USRE11871E - sekowsky - Google Patents

Description

Il 87|. Bessuedl Nov. I3, |900. "o H. sEKnwsKY.

PIPE ELBow MACHINE,

'Applica-tion led July 3, 1900.A

l0 Sheets-Sheet I.

1HE Mamas FErERs cu., WASHINGTON, n4 c.

Reissued Nov. I3, |900.

No. ||,a7|.

H. sEKowsKY.

PIPE ELBOW MACHINE.

(Application led July 3, 1900..

1HE NoRsls PETERS ca wAsHlNmaN, n. c,

No. II,87|.' Reissued Nov. I3. |900.

H. SEKDWSKY. PIPE lELow MACHINE.

(Application filed July 3, IQOUJ l0 Sheets-Sheei 3.

'rHE mmm: Pim-Rs co., wAsmNczmu, n, c.

Reissued Nov. I3, |900.

H. sEKowsKY. PIPE ELBOW MACHINE.

(Application filed July 3, 1900.1

I0 Sheets-Shen 4.

. No. II,87I. Heissued Nov. I3, |900.

H. SEKOWSKY.

PIPE ELBOW MACHINE.

(Application led July 3, 1900.

I I0 SheeI's-Sheei 5,

iff-45,10, y l

1x: Nmems PETERS ca., wnsHmcmN, n. c.

Reissued Nov. I3, |900.

H SEKUWSKY PIPE ELBUw MACHINE.

(Application filed July 3 1900 1HE 'vonnis Fsrfrns co,y msm/mrow, n. c.

PIP'E ELBOW MACHINE.

(Application fled July 3, 190DXl l0 Sheets-Sheet 7.

1H: NdRRls PETERS o.. wAsmNcroN, n. 1:v

I0 Sheets-Sheet B.

NNNHI TAT/m J 1H: :vonnis PETERS co., wmncrom-u, c.

No;A ||,87|. Reissued Nov. I3,v |900. H. SEKWSKY.

PIPE ELBOW MACHINE.

l (Application filed July 3, 1900,)

I0 Sheets-Sheet 9 l l l l l l l I 4 l L l 1 l a l l l Allmfllllllllwl Illlllll me Noyms pzrsRs coA, wAsmNcraN. n. c.

Reissued Nuy. I3, i906.

H. SEKWSKY.

PIPE ELBOW MACHINE.

\Applcation tiled July 3, 190U,\

i0 Sheets-Sheet 30.

1H: Nomzls PETERS :o As 1 own n UNITED STATES PATENT OFFICE.A

HERMANN SEKOWVSKY, OF MILWAUKEE, `\VIbCOl\lS1N, ASSIGNOR TO THE NATIONAL ENAMELIN-G AND STAMPING COMPANY, OF NEYV YORK, N. Y.

PIPE-ELBOW MACHINE.

SPECIFICATION forming' part of ".Eteissuedll Letters Patent No. 1 1,871, dated November 13, 1900.v

original No. 643,913, ma February 2o, 1900. Appleman for reissue and .my s. 1900. serial No.' 22,463.

e it known that I, HERMANN SEKoWsKY,

a citizen of the Jnited States, residing at Mil* waukee, Milwaukee county, State of Wiscon- 5 sin, have invented certain new vand'nseful Improvements in Pipe-Elbow Machines, of which the following is a specification.

My invention relates to improvements in machines for making pipe-elbows.

The object of my invention is to provide a 4form of machine which will automatically form the blank or liatsheet into a cylindrical pipe, successively crimp or creasethe same to form an elbow, pressthe sides of the in '15 wardly-projecting plaits or creasestogether, 'and fold the same over n pon the inner surface of the elbow ina continuous succession of operations; also, to provide' means for automatically controlling the movement of the zo machine to stop the same after each elbow lis completed and set in motion as the successive blanks are placed upon the feed-table by the operator, whereby the duties of such operator are reduced to the placing of the blanks upon `J5 the feed-table and the removal ofthe completed elbows from the machine.

' In the followindescription referenceis had to the accompanying drawings, in Which--y Figure 1 is a plan view of a machine em- 30. bodying my invention. Fig. 2 is a side elevation ofthe same. Fig. 3 is a detail perspective view o1' the mechanism for actuating the blank-holding stops. Figs. 4 and 5 are elevations of the front and rear ends, respectively. Fig. o'is a longitudinal sectional View` of that portion ofA the machine above the frame-body with a po-rtion -of the latter broken away to showthe jaw-actuating mechanism at the frontend of the machine and the' parts directly connected therewith. Fig. '7 isa side View of thejaw-actuating cam and cam hub or sleeve. Fig. S is across-sectional view drawn on line '1 ot' Fig. 6. Fig. 9 is a cross-sectional viewdrawn on line U U of Fig. ii, showing the cam-hub and shifting-lever, together willi the actuating-lever ofthe head-collar clamp, Jac. Fig. l() is an enlarged detail view of the head as seen from'the side, the head being closed upon the shaft end. Fig. 11 is a 5o top view ofthe same. Figs. 12, 13, and 14. `are side, top, and'sectional Views of a com# pleted, elbow, illustrating the work done by the machine. Fig. l5 is a sectional View of the head-shaft rand bending-rolls drawn onl line VVof Fig. 1 and showing also .the pipe- 5`5 holder and its clamping-collar, together with the clanip-actuating-mechanism. Fig. 16 is a detail side view of the pipeholder and clamping-lever, showing the lever-actuatin g guides, together with the bending-rolls and a portion 6o of the head-shaft, .as-seen from the opposite side from that occupied by the feed-table. Fig. 17 is a detail side View. illustrating the mechanism for actuating the head, to flatten the pipe crease or plait against the end of the head-shaft, together with the mechanism for folding the plait upon the interior surface, of the pipe. Fig. 18 is a view of the machine as seen from the under side, showing the actuating mechanism located in the interior of the 7o frame-body. Fig. 19 is a detail side'view of the mechanism for actuating the clampingarins of the' head-collar. Fig. 20 is a sectional view drawn on line X Xof Fig. l, showing the head-frame,` collar,l and clamping ,75 mechanism as seen from the rear. Fig. 2l is a detail sectional view drawn'on line Z Z of Fig. 19. Fig. 22 is a detail side View of the clutch-actuating mechanism for starting and stopping the machine. Fig. 23 is a de- 8o tail top View of a portion of the mechanism shown in Fig. 22, illustrating the relation of the cross-shaft to the clutch-actuating rod. Fig. 24: is a sectional View drawn on line Y Y of Fig. 1, illustrating the connec-` tion between the cross-shaft and blan k-holder. Fig. 25 is an enlarged transverse sectional View drawn th rough the frame im mediately in front of the cross-shaft 58 and also showing the pipe-holder. Fig. 26 is a detail side View 9o of a portion of the pipe-holder, showing the punch and the lever-supporting spring. Fig. 27 is a detail View of an actnating-pawl 152 of the pipe-holder, showing the engagement of the holding-spring in the notch 169 when 95 the pawl is in-ils raised position. Fig. 28 isa detail top view of the mechanism for actuating the rod 87 from the gear-wheel 458, showing one of the supporting-bearings of the shaft in section.

Like parts are ident fied by the same referl cnoerharacters thronghontthe several views.

IOO

1 is a head-shaft around which the blank or piece of sheet metal from which the elbonrv v tends through a longitudinal openingv in the shaft 1 and is connectedwith the head 3 by means of a cross-head 6, which is engaged, Fig. 10, in slotted bearings 7 in the head, whereby the latter may be drawn centrally against the shaft 1 by a pull exerted by the rod 5 or separated eccentrically from the shaftend upon the pivotal connection of the link at when the'rod 5 is moved forwardly.

To provide for the rotation of the head with the shaft without strain on the link 4 and rod 5, I have provided the shaft end with a bushingS, squarcd'on its exterior surface, Fig. 10, and projectingintoa socket 9 in the head, which socket should be sufciently large in its vertical diameter to permit the head to oscillate upon the link as a hingewvithout binding or cramping on the bushing S. Opposing surfaces of thc head and shaft end have a spiral trend, and the shaft end is provided with a lug 10, located on the shoulder formed bythe spiral pitch of the end face and projecting into a counterpart recess4 in the head 3.

Crimping-jaws 12 and 13, Fig. 4, are secured to a head-frame 14 and are arranged in pairs, the two jaws 12 being hinged together at 15 directly under the line of the shaft and head and connected at the sides with th'c headframe 11 by levers 16. The jaws 13 are connected with the upper portion of the headframe by arms 17 and with the lever 1G by links 18, the )arts being so arranged and proportioned that the jaws 12 and levers 1li and also the jaws 13 and links 1S form an inwardlymoving toggle in `each case, whereby an upward pressure exerted at the point of the hinged connection 15 of the jaws 12 will communicate motion to all the jaws to close them in the are of a circle of larger diameter than that of the shaft or head, the centerof which circle is above the axis of the shaft 1. As the jaws are. arranged to register withthe spiral opening between the head 3 and shaft end 2, they will when closed enter such opening on all sidesy except that' occupied by the lug 10, which in the construction shown is on the upper side when the shaft 1 is at rest.

The material from which the elbow is to be formed is fed into the machine in the form of la dat sheet-metal blank of the required size for the formation of an elbow. This is placed on the feed-table 1f) with its front edge bearing against the spring-actuated stop-pins 2O and its rear edge engaged' by a blank-holder 21, which is actuated by springs 22 to press the blank forwardly against the stops 20. \Vhen the machine is ready to receive-theblank, a rod 213, having arms 24 connected with the stop-pins, is oscillated', as hereinafter explained,'to retraetlhe latter against the tension'of their actuating-springs 25 when the blank is pressed forwardly by the blankholder 21 to the bending- rolls 26, 27, and 28, by means of which the blank is bent into cylindrical form around the head-shaft 1. As fthe blank leaves the bending-.rolls one of its end edges enters the annular space between the pipe-holder sleeve 2) and clamping-collar 30, and the other end edge'is at the same time engaged in the space between the open head-collar 31 and the shaft 1, the blank being guidedl by the collars around the shaft, so that as the rear edge of the .blank leaves the bending-rolls it springs upwardly and laps overthe-front edge, which has then completed the circuit of the shaft. The pi pe-holder 32, to which the sleeve 29 and collar 30 are secured, is then moved forwardly to force the front end of the cylindrical blank or pipe through the head-collar 31. It lwill be observed thata lever 33 is'eonne'ctcd with clamping-lips 34 of the collar 30 by means'of links 35. During the initial forward movement of the pipe-holder above referred to this lever engages a guide 3G, projecting from the bed-frame 37, which actuates the lever to d raw the collar 30 tightly around the rear end of the pipe, clamping the same rigidly upon the sleeve 2l). The upward movement of the lever 33 brings it into forcible contact with the 'punch 3S, carried by the pipe-holder, and the movementof the lever is communicated to the punch to drive the latter inwardly, as shown by dotted lines in Fig. 26, and thus indent the overlapping portions of the pipe at its real-end. The dent thus formed prevents the end of the pipe from spreading after fits discharge from the machine. The lever 33 is held in tho raised `or clamping position by means of i bent spring or catch 39, Figs. 25 and 26, un-

' til after the discharge of the completed el-l bow. The clamping-collar having been closed and the pipe-holder having completed its initial forward movement, the pipe is held thereby in position for crimping. The headcollar 31, which normally projects over the ICO IIO

joint between the head and shaftend,is drawn rearwardly, and the crimping-jaws 12 and 13 are closed about the pipe and force the latter "inwardly in the space between the head and shaft end, the indentation being ldeepest on the side 4opposite the lng 10, and therefore causing the pipe to bend in that direction.

' The jaws being withdrawn, the head-collar 31 is moved forwardly over the crease or crimp in thc pipe and clamped thereon, and theJ head is then drawn forcibly toward 'the shaft end to atten or press togetherthe sides of the interposed crease. The shaft then performs a single complete revolution, while the pipe is held from turning by the holder 32 and collars 29 and 30, respectively, the creased portion being discharged from between the head and shaft end over vthe lug lo, which folds the inwardly-projccting plait l-will not register with the joint between the head and shaft end, but will be advanced a distance equal to the spiral pitchof the plait or of the end face of the shaft. The pipe is then pushed forwardly by the pipe-holder for a short distance, and the operation of crimping, attening the plait or crease, and folding the same is repeated until a sufficient number of plaits or creases have been produced to form a right-angled elbow, when the forward movement of the pipe-holder 32 brings the lever. 33 into contact with a guide 40, which releases it from the catch 39 and opens the clamping-collar 8l), thus releasing the finished elbow.. The pipe-holder 32 is then withdrawn to its original position for the reception of the succeeding blank, and during its rearward movement a guide 41,carried.

thereby, engages .under the free end of a lever 42, which is connectedl with the rod 23 and lifts the lever to oscillate the rod and retract the stops 20, thus releasing the succeeding blank. The lever 42 is provided with a one-way hinge-joint 43, which permits the free end of the lever to be depressed by downward pressure exerted by theguide 41. will be observed that owing to the diagonal position of the guide upon the pipe-holder the forward movement ofthe latter causes the raised front end of the guide to inipinge on the upper surface of the-free end of the lever '42, and as the joint 43 permits the end of the lever to swing downwardly the guide passes over it without actuating `the main portion of the lever. When the pipe-holder moves rearwardly, the lowerrear end of the guide impingeson the under side of the end of the lever, and the guide then lifts the lever upon it to retract the4 stops 20, as heretofore lexplained. The jointed end of the lever is normally held in a horizontal position adapted to contact with the guide by means of a spring 45'.

Referring now more particularly to the acA tuating mechanism, 44 is adriving-shaft'provided with a pulley 45, through which motion is communicated to the machine from the source of power. The motion of the shaft 44 is com m unicated continuously to the bending-rolls 2G and 2.7 through the gear- wheels 46, 47, 48, and 40, shaft 50, pulley 51, belt 52, pulley 53, and gear-wheels 54 and 55, the latter being lix'edto the rolls. The roll 28 runs idle. 'lhe initial movement of the pipe-holder 32 is communicated to it from the shaft 5() through the imiter- gears 56 and 57, shaft 58, sleeve 178, and crank. 59, the latter being adapted. ,to engage a downwardly-prejecting arm (il) of the pipe-holder 32 when the latter has completed its rearward movement and to push the pipe-holder forwardly preparatory to crimping the pipe.

` The crimping-jaws are actuated by a cam .61,adjust-ably mounted upon a shaft 62 and secured to rotatev therewith by a suitable spline G3, (see Fig. 18,-) motion being communicated to the shaft 32 from the gear-wheel 47 through the sliding clutch 64, shaft 65, and gear- wheels 6G, 67, and 68, the latter being fast on thc shaft 62.

The jaws 12 are pivotally secured at 15 to a depending jaw-actuating bar (i9, which projects downwardly through suitable guides in the frame into the path ofthe cam when the latter is adj usted in its operative position, as hereinafter explained.

is anantifriction-roller located at the lower end of the bar G9 for contact with the cam. When the cam is in its operative position, the movement of its supporting-shaft 62 brings it first into contact with a lever cover the joint between the head and the shaft end 2 preparatory to the operation of the crimping-jaws. The continued movement of the cam brings it into contact with the roller 70 and forces the bar (i9 upwardly, thus causing the' crimping-jaws to movepinwardly to crimp or crease the pipe, as heretofore explained. r1`he cam is of such shape as to remain in contact with the lever 7 1 until the jaws are also actuated.

To retract the jaws after the cam has moved past the barili), I have provided an elbow-lever, Fig. 4, which is pivoted to the fram'e at 7S, with one arm 79 engaging a pin S0, projecting from the bar G9. ment of the bar 69 o'scillates the lever to swing the other arm 81 into the path of the cam, so that the latter as it moves past the bar 69 engages and actuates thearm S1 lo restoreit to. its normal position and retract the crimping-jaws through the medium of the arm 7E), pin SO, and bar GJ. The ljaws being restored to their normal positions, the head-collar 31 is moved forwardly over the seam by means ol' a spring 82, and on completing ils revolution the cam is shifted upon the sha-ft (52 out of the plane of the bar G9 until it is again desi red to actuate thejaws lo form the next succeeding crease or plait. In the construction shown ih'e cam is shifted once during each revel i Linn of the shaft G2', moving alternately to lin-'operative and inoperative position with the successive revolutions of the shaft;

The .Mechanism for shifting the cam is best The upward move- ICC) IIC

V90 71, which is pivoted to the frame at 72, with Figs. 18 and 21.

shown in Figs. 6 to 9, inclusive, taken with A cam-hub- 83 is provided with an annular groove 84, in which studs 85 of a stirrnp-shaped shiftinglever 8 6 are engaged. A rod 87 is secured to one endof th'is lever and connected with the machine-frame by a spring 88,'which tends to hold the lever 86, with the cam, in its forward-or inoperative position. The rearend of this rod 87 is,how ever, secured to an oscillatory shifting plate 89, which is provided with an arm 90, adapted to engage and actuated by a pin 91, projecting from the gear-wheel-68'on the rear end 'of the shaft 62, whereby the motion of the pin 91 may be communicated to the cam, 6 1 through the arm 90, shifting plate 89, rod 87,

and shifting-lever 86 to draw the cam backwardly into operative position. When the t cam is in such position, the pin 91 will obviconstruction is such that the holding-pin 94 is in position to enter the cross-channel 95 at the same time thatthe earn-adjusting pin 91 engages the arm 90. The holding-pin 94, having passed into the guide-channel 93, it holds the cam in 'its operative position during'one revolution of the shaft 62, as above stated,

' when a switch 97, located'in the channel and pivotally secured to thebase thereof, is carried by the rotation of the shaft under the pin 94 and serves as a wedge to force the pin y 94 backwardly out of channel 93, the rear portion of the switch 97 being of a thickness correspondin'gwith the depth of the channel, as illustrated in' Figs. 7 and 8'. Therefore as the switch pushes under the pin 94 the latteris pushed backwardly against thetension of its actuating-spring until the switch reaches a position with the lower end of the pin bearing upon its thicker portion, when the tension of the spring 88 retracts the rod 87 and actu'- atcs the shifting-lever 86 to move the cam to its inoperative position, the holding-pin 94 slippingr olf from the switch 97 over the intervening rib 96 into the channel 92 at a point slightly in advance of the cross-channel 9 5, so that the backward movement of the rod 87 will not be prevented by contact of the arm 90 with the adjusting-pin 91. The holding-pin 94 then remains in the channel 92 during the succeeding revolution of the shaft 62,

when it is again shifted into the channel 93 Y by the action of the pin 91 and theswitch97 98 is an arm projecting from the shiftinglever in a position to engage against and push the switch into position to receive the hold ing-pin. 94 and lift it out of the channel, as above explained.

The mechanism for pressing together the sides of the plait formed in the pipe by the crimping-jaws is operated from a gear-Wheel" 100, which is actuated from the gear-wheel 68, and is best shownin, Fig. 6 and Figs.17 t 21. 'The backward motion of the rod 87-when the latter is actuated by the spring 88 to shift the cam to its inoperative position is communicated to a clutch 101, through the plate 89, `dog 102, slotted lever 103, pin 104, and clutchactuating lever 105, to couple the gear 100 withA the shaft 106. The motion of the shaft 106 is communicated to close the head-collar 31 upon thepipe, Figs. 19 and 20, through the miter-gears 109 and 110, shaft 111, crank 112,

tooth 113, crank 114, rod 115, bell-crank 116, rod 117, bellecrank 118, link 119,v lever 120, links. 121,..and clamping-arms 122, the latter being hinged together 'at 123. The links 121 are arranged to pass each other and are secured to the lever 120 in such a manner -that when the clamping-arms are closed the linkcoupling -124 will be in a position substantially on or a little beyond the line of centers, thus locking the clampin its closed position until the lever 120 is actuated in the opposite direction. The lever 4 120 Vis extended npwardly and provided with a handle 125, by means of which it may be manually operated.

The continued movement of the crank 112l it intocontact with a pin 129 and communicates motion to the clutch 101 to u'nconple the IIO gear from the shaft 106 through said pin y tis position to be engaged by anarm 134, depending from a rod or shaft 135, Fig. 21, to which the cran k-plate 89 is secured. When the jawactuating cam 61 is shifted to. it's operative position through the medium of the gear.

wheel'68, pin 91, arm 90, crank-plate89, and

.the other connections heretofore described,

the motion of the crank-plate is also communicated, Fig. 19, to the Vlever 126, througb'the shaft 135, arm134, bar .132, andV lever 131, to

push the lower end of the lever 12,6 forwardly, thus actuating thegjod 5 and head 3, through the intervening connections, to separate the head from the .shaft end. Motion is also simultancously com municatod to release vthe clamping-arms 122 of theheadcollar 31 through the lever 126, tooth 113, crank 114, and the intervening connections heretofore described. I have4 also provided the bar 132` with'a catch 13b,- which actuates a leverL 'pressed together by the action of the rod 5 in drawing the head-3 against the shaft end 2 the shaft and head are rotated to discharge the creased port-ion of the pipe from between themvove'r the lug 10.

. complshed, Fig. 17, by means of a spri iig-actu- 'the pin139 is adapted to engage, whereby the;

actuated coupling-pin 139, supported from the gear-wheel (i7 by a lever 140 and operating through guide-brackets 141 and l42,projecting from the gear-wheel. The actuating-spring 143 is located between the lower bracket 141 and a cross-pin 143, and` tends to drive the coupling-pin in the direction ofthe shaft. The

socliet144 is provided in the shaft 1, in which will be lifted to withdraw the pin 139 fiom the socket 144 and permit the shaft 1 to come to rest', this operation being arranged to take place when the lug on the shaft end 2 is uppermost. The pin 139 onbeing released from the socket 144 rides upon the `surface of .68 being of equal size.

the shaft 1 until again permitted to enter the socket.

Then the shifting-lever 3G is actuated to shit'tthe jaw-actuating cam to itsinoperative position, the motion ofsnch lever is communicated to the lever 145, Figs. .1, 17, and 18, through a lever 147 and connectingq'od 148 to withdraw the lug 146 from the path of the clutchpin lever 140, so that as the pin 139 registers with the socket it enters the latter and rotates the shaft at the same speed as that of the shaft 62, both being actuated through the gear-wheel 67 and the gear-wheels 67 and As soon, however, as the shifting-lever 86 is actuated to adjust the cam (il to ,its operative position a reverse movement is communicated to thelever 145 and the lng 146 readjnsted in a position to engage the clutch-pin lever 140 and lift the pin ont of its socket.

As heretofore explained, the cam l is shifted once during each revolution of the shaft G2, moving alternately to its operative and the cam G1 isinoperative, and will come to rest d u ring the intermediate revolution, when the cam is operative. The position of the clntchj This movement isae-l allow a sufficient interval after the shifting v of the cam and consequent adjustment of the 11151146 before the clutch-pin will register with tened and the lever 126 released from the prcssu re ol' the crank 112. The same interval is also allowed after the cam 61 is adjusted backwardly to its operative position for the shaft 1 to complete its revolution and come to rest before the cam actuates the crimpingjaws.

lhe mechanism for actuating the pipeholder in the intervals between the successive movements of the crimping-jaws is best shown in Figs. 1 and 2. The pipe-holder is provided with rearwardly projecting rack-- bars 149, which are adapted to slide in ways 150. An intermittent forward motion is communicated tothe racks and pipe-holder from a'sliding rod 151 through a pawl 152, ratchet '153, gear-wheels 154 and 155, shaft 156, and rack-actuating gears 157. The rod 151 is pro- -vided at its rear end with a depending catch S, which is adapted to be engaged vby a spring-snpported'latch 159, pivo'tally secured tothe upper end of a leverlGO, the lower end of which is looseljT connected with the rod 5,as shown in Figs. 6 and 17.

as heretofore explained, thehpper end of the lever 160 moves forwardly and the latch 159 snaps past the catch 158. With the reverse movement of the rod 5 the pressure of the latch 159 upon the catch 158 draws the rod 151 rearwardly, the pawl152 sliding freely over the ratchet-teeth of the wheel 153. A

151 by means of a lug 102, carried by the gear-wheel c7, which lug is provided with an angular face adapted to engage a depending arm 163 of the rod 151 and push the latter forwardly, this motion of the rod 151 being communieated,l to 'the pipe -holder through the pawl 152, ratchet 153, and the intervening gears and rack-bars above mentioned. The lug 162 is so positioned on the gear-wheel 67 as to engage the arm y163 and actuate the pipe-holder as the shaft 1 completes its rotation and-afterv the clamping-arms 122 have released the head-collar 31. It will be nnderstood that as` the pipe-holder is clamped to ,the pipe continuously until the elbow is completed it will be drawn forwardly to a slight extent when the shaft 1 is rotated to fold the pipe-'crease and the creased portion is discharged from the spiral opening between the head 3 and the shaft end 2, this action being similar to that of a screw. "The nieveinent of the rod 151 is therefore gaged to actuate theipipe-holder and pipe snfhcientlyto bring the latter inte a position for the formation of the next crease after allowing for the forward movement of the pipe and pipeholder while the preceding crease is being folded.

`When the rod 5 is drawn rearwardly to Hatten the pipe-crease,

reverse movement is then imparted to the rod l pin 139 upon the gear-wheel 67 is such as to the shaft-recess to permit the seam to be ilat- When the elbowfis completed, a stud 164,1..

l the pawl being` then-held in its raised position 169 in the pawl.

by a spring-catch 168`,whi ch engages in a notch The clam p-holding lever33 of the pipe-holder simultaneously engages the guide 4U,` Fig. 16, and is depressed thereby to release the clampingcollar 30, as heretofore explained, when the pipe-holder is` re-v tracted to its extreme rearward position bya weight 170, connected with the pipe-holder by a iiexible connection 171. When the pipeholder has completed itsrearward movement, the stud 164 engages underneath the lever 165 and communicates a reverse movement to the pawl 152, releasing the pawl from the catch 168 and permitting it to rengage the ratchet 153 preparatory to `the next forward movement of the pipe-holder.

The mechanism for' automatically starting the machine when ready for the construction of an elbow or for stopping it when the same is completed is illustrated in Figs. 22, 23, and 24, the machine being controlled in this respect by means of the clutch `64. 1t will be observed that the clutch is operated byva fork 172 of a lever 173, the lower end of which is Vconnected with a rod 174, extending to the Y front endof the machine and provided with a handle 175, by means of which the clutch may be manually adjusted. The rod 174 is provided with an arm 176,-which when the clutch is uncoupled occupies a position in the path of a crank 177, projecting from a loose sleeve 178, located on the cross-shaft 581;.

The sleeve is adapted to be coupled to the `shaft by a key 180, which extends through an aperture therein and is adapted to register with a socket 181,(see Fig. 24) in the shaft 58,

' but is norm ally held out of engagement therei with by means of a lever 182, pivotally sccured to the sleeve, with one end attached to thekey 180 and the other end adapted to en gage under the end of the post 183, the upper end of which is connected with an elbow-lever 184. The blank-holder 21 is provided with an arm 185, which is arranged to eugage one arm of the lever 184 when the blankholder is drawn out for the insertion of a biank, this moiion ofthe blank-holder being communicated to the post 183 .through the lever 184 to raise the postand release the lever 182l from the lower end thereof, 'at the same time permitting the key 18() to enter the socket 181 and lock the sleeve to the shaft 58. Motion is then communicated from the shaft-50 to actuate the clutch 64 and couple the shaft 65 to the gear-wheel 47 through the bevelgears 56 and 57, cross-shaft 58, slee ve 178, crank 177, arm 176, rod 174, and clutch-shifting lever 173. When the sleeve 178 has completed its revolution, the lever '182 reengages under the end of the post 183, which depresses the engaged end of the lever and lifts the key out of its socket, thus permitting the sleeve to come to rest. It will be understood that the required movement of the lever 182 is very slight. Therefore a slight bevel on the upper surface of the lever or the lower end of the post 183 will permit the passage of the .lever under the post, the lever being depressed `by the weight of the post and its connections.

As the movement of the lever is an extremely communicatesits motion to open the clutch 64' through'the rod A174 and clutch-shifting lever 173, thus stopping all parts of the machine except the bending-rolls, through which theneXt blank is then fed.v The rearward movement of the pipe-holder actuates the stoplpins 20 by means ofl .a guide 41 and lever 42 to release the blank from the feedtable, as above explained. -189 is a screw for adjusting the feed-table 19, thecurvature'of the blank being regulated by the angle ofthe feed-tablelwith reference ,to the bending-rolls.

Reviewing the operation of the machine and assuming that the driving-pulley is cou- `Sie ICO

nected with a source of power and the clutch 64 uncoupled from thegear-wheel 47, the first blank is fed over the table '19 without inserting it in the blank-holder 21, the stoppin lever 42 being manually actuated to elevate the stop-pins and permit the blank to pass to the bending-rolls. .Thelatterbeingcontinuously actuated from the driving-pulley, the blank will be at once wound uponV the shaft 1, with its; front andrear ends loosely engaged by the clamping-collars 31 and "30 of thehead and pipe-holder. A second blank is then. placed upon the' feed-table, the blank-holder 2l beingfdrawn outwardly to engagethe blank between it and the stop-pins. The movement of the blankholder is com municated to conple the sleeve 178 to the cross-shaft 58,` as above explained, and the initial forward movement of the pipe-holder is then communicated to it from the cross-shaft 58 through the sleeve 178 and crank 59, when the lever 33 of the pipe-holder-clam ping collar 30 is engaged by the guide 36 and lifted to clamp the rear end of the pipe securely to the pipe-A holder 32, the pipe being sim ullaneously dented andpushed forwardly through the headcollar in a. position to be acted upon by the crimping-*jaws in producing the rst crease. The crank 177 then actuates the arm 176, which communicates its niotion to the clutch 64 to couple the shaft G5 with the gearfwheel -IIO to res-t; The gear-wheel 47 and shaft 65 be- *ing coupled together motion is then commit' nicated from the latter through the cam 61 to retract the head-collar 31 and actuate the crimping-jaws to form the first pipe-crease and then retract the jaws, after which the head-collar isnioved forwardly overthe pipecrease by the reaction ofthe spring 82, which also communicates its motion throughfthe Ashifting-lever 86 to the lever'145 and lug14=6 to permit the coupling of theshaft 1 with the gear-wheel 6,7 and simultaneously actuates the clutch'101 to couple the gear-wheel 100 with the shaft 106. The motion of the gearwheel 67-is .then communicated through-the shaft 106 and intervening mechanismto successively clamp the head-collar-upon the pipe, draw the head forcibly` against the shaft'end to flatten the inwardly-projecting pipe crease or plait,and uncouple the shaft 106 from the gear-wheel 100. As soon as the pipe-crease is flattened, as above stated, the coupling-pin 139, carried by the gear-wheel 67, enters the socket in the shaft 1 and-rotates the latter to fold the plait on the inner surface of the pipe, after which the cam is Ashifted to its operative position by means of the pin 9 1, carried by the gear-wheel 68, which simultaneously comm unicates its motion through the arm 134 and intervening connections to open the clamp-A ing-arms of the head-clamp, pushthe headrod 5 forwardly to swing the head 3 outwardly from the shaft end, and through the shifting-1ever and its connections to readjust the lever 145 and lug'l46 in positionto uncouple the shaft 1 and gear-wheel 67. Thecontinued movement of the gear- Wheel 67 then brings the coupling-pin lever into contact with the lug 146 and uncouples the shaft, .the gear-wheel lug 162 then actuating the pipeholder through therod 151 and `intervening pawl-and-ratchet mechanism. The operation of crimping the pipe and flattening and folding the plait is successively repeated until the elbow is completed, when the pipe-holder clamp-lever is depressed by the guide 40 to release the elbow, as heretofore explained, and theclutch 64 simultaneously actuated 4to uncouple the shaft 65 and gear 47, the pawl 152 being at the same time raised and the pipe-holder retracted to its original position by the weight 170. The rearward movement of the pipe-holder is communicated through the actuating-lever ol' the feed-table stop-pins to release the next succeeding blank, which is then fed inl 0 the bendingrolls by the blankholder.- The machine then awaits the action of the operator in inserting the next blank in the holder 21, from which the succeeding movements of the machine are controlled, as above explained.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a pipe-elbow machine, the combina'- Aof the axis of the shaft, ailug projecting from the shaft end into a recess in the head, and means for actuating the head upon said shaft, opposing surfaces of the head and shaft'being formed with la spiral pitch, terminating in said lng.

4. In a pipe-elbow machine, the combination of `a shaft having one end formed'with a spiral pitch, a head adjustably secured to said shaft end, at oneside ofthe axis thereof, and

means for alternately oscillating` said head and rotating the shaft and head.

5. In a pipe-elbow machine, the combination of a shaft, a head 'a'djustably secured to one end thereof, the opposing faces of the head and sha-ft end being formed with a spi ral pitch, means for creasingr a pipe-cylinder in the space between the shaft and head, and means for rotating the shaft with the head.

6.' In a pipe-elbow machine, the -combination of a shaft, a head adj ustably secured to one end thereof at one side of the shaft-axis, anda lug projecting from the shaft and er1- gaged in a recess in the head. i '7. In a pipe-elbow machine, the combination of a shaft, a head adjnstably secured to o ne end thereof at one side of the shaft-axis, a; bar, angular in cross-section, projecting from the shaft and loosely engaging a socket in the head, means for creasing a pipe-cylinder in the space between the shaft and head,

ICO

and means for rotating the shaft and head.

the shaft end, means for holding a sheet-metal cylinder non-rotatably on said shaft and head, and means for rotating the shaft. 4,

9. In a pipe-elbow machine, the combination of a shaft having one end face formed with a spiral pitch, a head adjustably secured thereto, with the opposing face thereof also formed with a spiral pitch, means for adjusting said head with reference to the shaft end, a non-rotatable pipe-holder and means for rotating theshaft.. 10. In a pipe-elbow machin`e,.the combination of a shaft, a head adjustably secured to one end thereof, a non-rotatable pipe-holder "means for adjusting the head to and from adapted to hold a section of pipe over said- I shaft and head, means for crimping-the pipe between the shaft end and head,'and means for rotating the shaft, the opposing faces of the head and shaft end being provided with tion of a shaft having one end thereof formed l a spiral pitch.'

11. In a pipe-elbow machine, the combination of a shaft, a head adjustably secured to one end thereof, a lug projecting from the shaft, and engaged in a socket in the head, means for creasingthepipe between the head and shaft, and means for rotating the shaft.

' 12. In a pipe-elbow'machine,the combination of a shaft, a head adjustably secured to one end thereof, a non-rotatable pipe-holder, y

means for creasing the pipe between the head and shaft, and means for rotating the shaft.

v13. In a pipe-elbow machine, the combination of a shaft, ahead adj ustaloly secured to one end thereof, a lug projecting from the` shaft and engaged in a .socket in the head, a hinge connectingsaid head and shaft between the lug and the axis of the shaft and head, and means for rotating the shaft.

14. In a pipe-elbow machine, the combination of a hollw shaft, a head adj ustably secured to one end thereof, a rod extending through said shaft and secured to the headf by a hinge connection; a lug projecting fx om the shaft and engaging a socket in the head, a hinge securing said shaft and head together between the lug and shaft end, means for actuating said rod to oseillate the head uponthe shaft end, and means `for rotating the shaft.

l5. In a pipe-elbow machine, the combination of a hollow shaft, a head adjustably sethereto, crimping-jaws adapted to enter the space between the head and shaft end, means for oscillating the head upon the sha-ft end and means for rotating the shaft.

17. Ina pipe-elbow machine, the combination of a shaft, a head adjustably secured thereto, crimping means adapted to enter the Space between the head and shaft end, means for oscillating the head upon' the shaft and means for rotating the shaft, the Opposing surfaces of the head and shaft end being' formed with a spiral pitch.

1S. In a pipe-elbow machine,tl1e combination of a shaft, ahead adjustably secured thereto with the opposing faces of 'the head and shaft end formed with a spiral pitch, a hinge securing the head to the shaft end at one side of the axisof the shaft, crimping means adapted to register with the opening formed by oscillating -the head upon said hinge, means for actuating the crimping means and means for rotating the shaft.

1f). In a pipe-elbow machine, the combination of a shaft, a head hinged thereto at one side of the. axis of the shaft, a set of crimping-jaws arranged to entei the space between! lated on said hinge, alug projecting from the shaft end and entering a recess in the head, .and means for successively actuating the crii'nping-jaws and rotating the shaft and head. i

20. In a pipe-elbowmachine, the combination of a shaft, a head hinged thereto at one Side of the axis of the shaft, a set of crimping-jaws arranged to enter the space between the head and shaft when the latter is oscillated on said hinge, a lug vprojecting from the shaft end and entering a recess in the head, and means for successively actuating the crimping-jaws and rotating the shaft and head, the opposing faces of the shaft and vsaid shaft, to cover the joint between the head and shaft end,'and means for successively actuating the crimping means and r0- tating the shaft and head.

22. In a pipe-elbow machine, the combination of a shaft, a head hinged thereto at one side of the axis of the shaft, a set of crimping-jaws arranged to enter the spaceQbetween the head and shaft when the latter is oscillated on said hinge, a lug projecting from the shaft end and entering a recess in the head, a collar adapted to be shifted longitudinally of said shaft, to cover the joint between the .head and shaft end, and means for successively actuating the crimping-jaws and rotating the shaft and head, the opposing faces of the shaft and head being provided with a spiral pitch.

23. In a pipe-elbow machine, the combination of a shaft, a head hinged thereto at one side of the'axis of the shaft, a setof crimpingjaws adapted to register with the joint formed by the head and shaft end, a collar adapted to be shifted longitudinally of the shaft, to cover the joint between the head and shaft end, and means fersuccessively actuating the crimping-jaws, collar, head and shaft.

24. In a pipe-elbow machine, the'combination of a shaft, a head hinged thereto at one side of the axis of the shaft, with the oppos- .ing faces of the head and shaft end formed with a spiral pitch, a set of crimping-jaws adapted to register withthe joint formed by the head and sha-ft end, a collar adapted' to beshifted longitudinally of the shaft,"to cover the joint between the head and shaft end and means for successively actuating the-crimping-jaws, collar, head and shaft.

25; In a pipeeelbow machine, the' combination of a shaft, a head hinged thereto at one side of the axis of the shaf-taset ef crimpingl jaws adapted to register with the joint formed IOO by the head and shaft end, a collar adapted to be shifted longitudinally of the shaft, lo cover the joint betweenthe 'head and shaft end, a pipe-holder cooperative with said collar, to hold the pipe in position for the formation of the elbow, and means for successively actuating the c1iiiipi1ig-jav\'s, collar, head and shaft.

26. In a pipe-elbow machine, thecombination of a shaft, ahead hinged thereto at one side of the axis of the shaft, with theepposing'faces of the head and shaft end formedwith a spiral pitch, a set of crimping-jaws adapted to register with the joint formed by the head and shaft end, a collar adapted to be shifted longitudin ally of the shaft, to cover the joint between the head and shaft end, a pipe-holder cooperative with said collar,'-to hold the pipe in position,for the formation of the elbow, and means for successively actuat- 4 ingthe crim ping-jaws, collar, head and shaft.

27. In a pipe-elbow machine, the combinaitio'n of a shaft, a head adjustably secured -thereto, with the opposing faces of the head and shaft end formedA with a spiral pitch,

'means for oscillating the head upon the shaft end, crimping-jaws adapted to enterthe space between the head and shaft'end, an open collar adapted to be shifted longitudinally to cover thejoint between the head and shaft end, clam ping-arms adapted to engage said collar, a pipe-holder cooperative with said collar, to hold the pipe'in position-upon said headq and shaft, and means for s'uccessivelyactuating thecrimping-ja-ws, head, collar, clamping` arms and shaft.

28. In a pipe-elbow machine, Athe combination ofv ashaft, a head adjustably secured thereto, with the opposing faces of the head and'shaft end formed with a spiral pitch, a lug projecting from the shaft and engaged in a'slot in said head, means for oscillating the head-u pon the shaft end, crimping-jaws adapted to enter the space between the head and shaft end, an open collar adapted to be shifted longitudinally, to'covei` the joint between the 4 head and shaft end, clamping-arms adaptedto engage said collar, a pipe-holder coperative with said collar to hold the pipe in position npon'said head and shaft, and means for successively' actuating the crimping-jaws,`

head, collar, clamping-arms and shaft.

29. In a pipe-elbow machine, the combination of ashaftfa head adjustably secured thereto, with the opposing faces of thc'head and shaft end formed with a spiral pitch, a lng projecting from the shaft and engaged in a slot in said head, a hinge'conu'ecting the head and shaft end between the lng and the axis of the shaft, means for oscillating the head upon the shaft end,crimpingjaws adapted to enter the space between the head and shaft end, a'n

open collar adapted to be shifted longitudinally to cover'the joint between the head and shaft end, clamping-arms adapted to engage said collar, a pi pe-holder cooperative with said ecllar, to hold the pipe in position upon said'.

head and shaft, andI means for successively actuating the crimpingjaws,- head, collar, clamping-arms, and shaft.

30. In a pipe-elbow machine, the combinaformed with a spiral pitch,a pipesholder ad apted to hold the pipe upon said shaft and head, means for intermittingly.actuating the pipeholder, cri m pin g-jaws adapted to register with the joint between The head and'shaftend,and

means for actuating said jaws to crimp the' pipe in the intervals betweenthe successive movements of the pipe-holder.

. tion of a shaft,a head hinged to one end thereof at one side of the axis of the shaft, with the j opposing ,faces of the head and shaft` end 31. In a pipe-elbow machine, the combinal opposing faces of the head and shaft end formed with a spiral pitch,a pipe-'holder adaptedto hold the pipe upon said shaft and head, a clamp adapted to rigidly bind the pipe upon the said holder, means for intermittingly actuating the pipe-holder, crimping-jaws adaptedto register with the joint between the head and shaft end, andl means for actuating the ,at one side of the axis of the shaft, with the said jaws to crimp the pipe in the intervals 4 between the successive movements of the pipe-holder. r

In a pipe-elbow machine, the combination of a shaft, a headadjnstably secured to one end thereof and adapted to oscillate ec` centrically thereon,` the opposing faces of the head and shaft being formed with a spiral pitch, a pipe-holder adapted to hold the pipe upon the said shaft and head, a clamp adapted to rigidly bind the pipe upon the pi pe-holder,

an open head-collar adapted to be shifted with respect to the joint between th e head and shaft end, clamping-arms adapted to bind the headcollar around the pipe over said joint, crimping-jaws adapted to register with the joint between'the shaft and head, means for intermittently actuating the pipe-holderA and -means for successively actuating the crimping-jaws, head-collar, clamping-arms, head and shaft in the intervals .between the snccessive movements oft-he pipe-holder.

34. In a pipe-elbow machine', the combination of a shaft, a head adj ustably secured to one end thereof and adapted to oscillate eccentrically thereon, the opposing faces of the head and shaft end beingrformed with a spiral pitch, a head-collar, a pipe-holder, a clamping-collar connected therewith, a set of bending-rolls arranged to bend a sheet of metal blank around the shaft, with its ends engaging under said collars, means for moving the pipe-holder forwardly, a `lever for actuating said clamping-collar to secure the cylindrical blank to thepipe-holder,erimpingjaws adapted to register with the joint between the shaft and head and means for rotating the shaft.

35. In a pipe-elbow machine, the combination of ashaft provided with an enlarged e'nd, a head adjustably secured to the shaft end and adapted to oscil late eccentrically thereon, the opposing faces of the head and shaft end being provided with a spiral pitch, a headcollar, a pipe-holder, a clamping-collar connected therewith, a lever for actuating the clamping-collar, a punch carried by the pipevholder and adapted to be actuated by the clamping-collarlever to dent the pipe engaged by said collar, crimping-jaws adapted to register with thejoiu t between the head and shaft end, and means for rotating the shaft.

3G. In a pipe-elbow machine, the combination of a shaft provided with an enlarged end, a head adj ustably secu red to the shaft en d and adapted to'oscillate ecceutrically thereon, the opposing faces of the head and shaft being provided with a spiral pitch,a head-collar, a pipeholder,a clamping-collar connected therewith, a set'of bending-rolls adapted to bend a sheetmetal blank into cylindrical form around said shaft with its ends engaging under said eollars, a lever for actuating the clamping-collar, a punch carried by the pipe-holder and adapted to be actuated by the clamping-collar lever to dent the pipe engaged by said collar, crimping-jaws adapted to register with the joint between the head and shaftend, and means for rotating the shaft.

37. In a pipe-elbow machine, the combination ofa shaft,a pipe-holder adjustably mounted thereon, a clamping-collar connected withv the pipe-holder, a head-collar located at one end of the shaft, and a set of bending-rolls arranged to bend a sheet-metal blank into cylindrical forni around said shaft, said collars being adapted to engage and guide the front and rear endsof said blanks around the shaft and hold the cylinder thereto.

38. In apipe-elbow machine, the combination of a shaft provided with an enlarged end, and having the end face formed with a spiral pitch, a head formed to lit said shaft end and hinged thereto at one side of the axis of the shaft, means for adjusting the head-upon said hinge,a pipe-holder adjustably mounted upon the shaft, a clamping-collar connected with the pipe-holder, an adjustable head-collar adapted to cover the joint between the shaft and the 'hea-d, a set of bending-rolls adapted to bend a sheet-metal blank into cylindrical form around the shaft, in a position with the ends of such cylinder engaged by said collars,

a lever for clamping the pipe-holder collar upon said cylinder, means for crimping the cylindrical pipe in the slm-cc between the head and shaft end, and means for actuating said head to flatten the' crimped or creased portion of the pipe, and rotating said shaft to discharge such portion of the pipe from between the shaft and the head.

3U. In pipe-elbow machine, the combinatjon of a shaft, a pipe holder adj ustably mounted thereon, a set of bending-rolls adapted to bend a sheet-metal blank around said shaft, a feed-table, blank-holding stops adapted to retain the blanks thereon, a spring-actuated blank-holder adapted to engage the blank between it and said stops and means carried by the pipe-holder, for rctracting said stops during its rearward movement, and releasing the blanks,whereby thelatter are permitted to enter the bending-rolls.

40. In a pipe-'elbow machine, the combination of a shaft having one end formed with a spiral pitch ou the end face, a head adjustably secured thereto, crimping-jaws adapted to register with the joint between the head and shaft end, a pipe-holder, a clamping dcvice connected therewith, a feed-table, means for automatically feeding sheet-metal blanks therefrounand bending the same into cylindrical form around said shaft, pawl andratchet mechanism arranged to intermittently actuate the pipe-holder, and means for successively actuating the crimping-jaws in the intervals between the successive moveL ment of the pipe-holder.

41. In a pipe-elbow machine, the combination of a shaft having one end face formed with a spiral pitch, a head hinged thereto, at one side of the axis of the shaft, a head-frame, a set of crimping-jaws secured to the` headframe and linked together so as to form an v inwardly-moving toggle, an actuating-shaft, a jaw-actuating cam4 located thereon, andal sliding bar connected with said jaws and adapted to be actuated by said cam to close the jaws, said jaws being adapted to register eccentrically with the joint between the shaft and head.

42. In a pipe-elbow machine,'the combination of a shaft having one end face formed with a spiral pitch, a head hinged thereto atone side of the axis of the shaft, a head-frame, a set of Acrimpiii 1;-ja.,.vs secured to the headframe and linked together so as tor form an inwardly-moving toggle, adapted to register eccentrically with the joint formed by `the head and shaft end, an actuating-shaft, a jaw-actuating cam located thereon, a sliding bar connected with said jaws and adapted to be actuated by the cam to close the jaws, and means for adjusting the head upon'its shaft.

43. In a pipe-elbow machine, the combination of a shaft having one end face formed with a spiral pitch, a head hinged thereto at one side of the axis of the shaft, a head-frame, a set of crimping-jawssecured to the headframe and linked together so as to form an inwardly-moving toggle adapted to register eccentrically with the -joint formed by the head and shaft end, an actuating-shaft, a ja-wactuating cam located thereon, a sliding har

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