US2490901A - Fastening-inserting machine - Google Patents

Description

Dec. 13, 1949 F. c EASTMAN EI'AL 2,490,901

mamas-Immune momma Original FiJLed llarch'6. 1946 5 Sheets-Sheet 1 Inven for-s Fred C Eastman Philip Barby 1949 F. c. EASTMAN ETAL 2,490,901

FASTENING IHSER'I'ING MACHINE Original Filed March e, 1946 5 Sheets-Sheet 2 Inventors Fr'ed CFaszman Philip E Barby K y F. C. EASTMAN EI'AL FASTENING-INSERTING MACHINE O-giginal Filed Ila-N116. 1946 Dec. 13, 1949" Ihven tors Red CEaszman Philip E. Bur-by 5 Sheets-Sheet 3 ir AH ngy Dec; 13, 1949 F. c. EASTMAN ETAL 1 FASTENING INSERTING MACHINE Original Filed March s, 1946 s Sheet-Sheet 4 In ven fans Fred C. Easiman Philip E Bu r55 By i/ziAi'i nay 13, 1949 F. c. EASTMAN EI'AL 2,490,901 FASTENING-INSERTING MACHINE Original Filed March 6, 1946 5 Sheets-Sheet 5 [nvenfors Fred C Easzman Patented Dec. 13, 1949 2,490,901 FASTENIN G-INSERTIN G MACHINE Fred C. Eastman,

Marblehead, and Philip, E.

Burby, Beverly, Mass., assignors to United Shoe Machinery Corporation,

Flemington, N. J a

corporation of New Jersey Original application March 6,

652,472. Divided an 24, 1947, Serial No. 7

1946, Serial N0.

(1 this applicationJaniiai-y 23,912

18 Claims. (Cl. 118.1)

This invention relates to fastening-inserting machines, the present application being a division of a copending appliation for Letters Patent for improvements in Shoe machines, Serial No. 652,472, filed on March 6, 1946. The invention is shown as applied to a toe-lasting machine having means for driving a plurality of fastenings around the toe endofthe shoe bottom to fasten the upper in lasted position, but it will be understood that it is not limited to machines of that kind or, in some aspects, to machines for operating on shoes.

The machine herein shown includes in its organization a plurality of fastening-inserting devices having fiuid-operated drivers movable independently of one another to drive 9. corresponding number of fastenings. As applied to such an organization, the invention provides novel means to cause different drivers to operate respectively at different times. In the construction shown the drivers are operated by pistons all of which are subjected at one time to the pressure of the operating fluid, and associated with the pistons are devices which hold them initially against movement by the fluid but are operated to release them in a variably predetermined order, the order of their release being preferably such that, for the most part, different pairs of fastenings are driven in succession. In this manner the application of excessive pressure to the work in the driving of the fastenings is avoided and insurance also is afforded against any undesirable drop in the presence of the operating fluid such as might result if all the drivers were operated simultaneously. Provision is further afforded, as herein shown by control of the above-mentioned releasing devices, for varying the number and arrangement of the fastenings driven by preventing selectively the operations of diiierent drivers.

The above and other features of the invention, including various novel details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and thereafter pointed out in the claims.

In the drawings,

Fig. 1 is a view in right-hand side elevation oi the greater portion of the machine in which the invention is herein shown as embodied, with parts broken away;

Fig. 2 is a plan view on an enlarged scale of the upper front portion of the machine, with parts broken away;

Fig. 3 is a section on the line IIIIII 'ofFig. 2; Fig. 4 is a view mainly in rear elevation of the portion of the structure toward which the arrow A points in Fig. 3 i

Fig. 5 is a sectionon the line V-V of Fig. 4; Fig. 6 isa sectionhn" the line VIVI of Fig. 5; Fig. '7 is a viewin right-hand side elevation of a portion of the means'for controlling the driving of the fastenings'; v

Fig. 8 is a sectionjon the line VIII-VIII of Fig. 9 is a vertical sectional view on an enlarged scale showing one of the fastening-inserting devices with the driver at the end of its operative movement; and Fig. 10 is mainly aplan view, with parts in section, showing the fastening-inserting devices in positions for driving the fastenings around the toe end of the bottom of a shoe.

As more fully disclosed in the above-mentioned copending application, the toe-lasting machine to which the present invention is shown as applied is provided with a plate 2 for positioning a shoe heightwise in the machineby engagement with the bottom face of the toe end of the insole, the position of the shoe lengthwise being determined by an end gage 4 arranged to serve as an abutment in contact with the toe-end face of the last and so formed thatit also centralizes the toe end of the last 'and sh'oe laterally. Early in a cycle of automatic operations of the machine, corresponding to one'revolution of a cam shaft 6 driven through a clutch 8, the end gage 4 is swung upwardly away from the shoe after the shoe has been clamped against the plate 2 by upward movement of a toe rest Ii) shown in Fig. 1. A

heel rest I 2 also is moved rearwardly into engage ment with the heel-end face of the shoe to assist in holding it against lengthwise displacement.

Shortly after the beginning of the cycle the mar- "gin of the upper about the toe end of the last is gripped by a pluralityof grippers, three of which are identified generally'by'the reference characters l4, l6 and 18in Fig. 3, and these grippers are operated to pull the upper in directions height- "wise of the last. In p'roper timerelation to the movements of the grippers a pair of toe-embracing wipers 20 (Figs, 3;9 and 10) are advanced and closed to engage the upper about the end and along the sides of the toe and are moved upwardly to wipe the upper heightwise of the last. Thereafter the wipersarefurther advanced and closed to wipe the marginal portion of the upper inwardly over an insole on thelast, the grippers being opened-"(to release the upper and being moved to positions such as not to interfere with means for thereafter fastening the margin of the upper to the insole.

For fastening the upper the machine is provided with a plurality of fastening-inserting devices each identified generally by the reference character 22, thesedevices being hereinafter frequently referred to as tackers sincethey are constructed to drive tacks. As shown in Fig. 10, these tackers are seventeen in number for driving a maximum of seventeen tacks about the end portion of the shoe bottom. Each tacker (Fig-9) includes a tack holder 24 and atack driver 26 movable in a driver passage 28 in the tack holder to drive the tack, the driver being detachably secured to a driver bar 30 which, as shown in Fig. 3, is guided by an upwardlyextending portion of the tack holder and may be considered a part of the tacker. Near its lower end each tack holder 24 is provided with a pair of tack fingers 32 arranged to extend inwardly through openings in its opposite si gles to support the tack in the driver passage prior-to the tack-driving.

operation. The tack fingers have vintegral therewith upwardly extending leaf springs .34 the upper ends of which are; secured tp the tack holder. When the driver 26, therefore, is operated to drive the tack it forces the tack fingers apart to permit it to pass between them, as shown in Fig. 9. Tacks are fed at the proper time in the cycle through flexible tubes 35 (Fig.1) into tack-receiving passages36 in the several tack holders by means fully described in the previously mentioned copending application, and when the drivers are retracted above the. lower. ends ,of these passages the tacks are admitted into the driver passages 28 where-theyare supported by the tack fingers in positions to be driven. a

One of the tackers, which may end tacker, drivesitstack in the V-shapedre cess between the wipers 20 when the latter are at the limits of their inward wiping movements:

over the shoe bottom, as will be evident from r Fig. 10. The other tackers drive their tacks through holes 38 in the wipers, one of which holes is shown in Fig. 9, the tapering lower ends of the tack holders 24 being seated in. recesses 40 in the upper faces of the wipers when the tacks.

are driven. In order, however, to provide room for the operation of the several gripper-son the upper, the tack holders occupy initially positions in which they are both upwardly andoutwardly retracted substantial distances from; their tack.- ing positions, as shown in Fig. 3. Tolpermit such outward retractive movements of the tack holders and to provide furtherfor adjustments of the tackers relatively to one another, each driver bar. its is pivotally mounted at its upper endon apin 42 (Fig. supported in a block 44 which is pivotally mounted on a pin 45 at-right angles .to the pin 42 and supported in a block 43 fast on the lower end of a piston rod 5i] through which the driverbar is operated. This piston rod extends upwardly into a cylindrical bore nor. cylinder- -52 formed in a casting 54 onthe irameof the machine and has fast on itsupperaend av piston 55 operated preferably by compressed air as hereinafter described,.the several cylinders and pistons being arranged in a semi-circular series (Fig. 2 By means also hereinafter described each piston 56 is held initially at the upper end of the cylinder in which it is mounted. It will be evident that the above-described connection between each driver bar 39 and block 48 provides a universal joint permitting the tacker to be swung laterally in any direction. By mechanism fully disclosed be. termed the in the above-mentioned copending application, which need not be herein described in detail, the several tackers are swung automatically at the proper time in the cycle of operations to positions over the recesses 40 in the wipers and the tack holders 24 are moved downward relatively to the driver bars 30 to position their lower ends in the recesses 40 with the tack drivers in alinement with the holes 38 in the wipers.

Compressed air is conducted to the upper ends of the. several cylinders 52 to operate the tack drivers through a passageway 58 (Figs. 2 and 3) formed in the casting 54 and closed above by a cover plate 50 on the casting, this passageway leading directly to the middle cylinder and communicating also with the upper ends of the other v cylinders through a semi-circular passage 62 in the casting, The passageway 58 communicates at its rear end'with a vertical passageway 64 arranged to communicate at times through a port 56 with a valve chamber 68 formed in a casing secured to the casting 54 and receiving compressed air through a pipe 12 leading from'any chamber 68 is a slide valve 14 mounted on a rod 16 and confined between flanges l8 and 88 on the rod. When the rod is moved downwardly,

as hereinafter described, to a position determined by engagement of the flange 80 with the casing NJ it opens the port 66 to the chamber 68 to admit compressed air to the upper ends of the several cylinders 52, and when it is moved upwardly from that position it closes communication between the chamber 68 andthe port 66 and opens communication between this port and an exhaust passage 82 in the casting 54 to permit exhaust of the air from the upper ends of the cylinders. For returning the pistons 56 and thereby retracting the tack drivers air is admitted to the lower ends of the cylinders through passageways 84 in the casting from-a semi-circular passageway tl'i which is closed underneath by a plate 88 on-which the casting 54 rests. Air is conducted to this semi-circular passageway through a horizontal passageway 99 and a vertical passageway 82, the latter being arranged to communicate with the valve chamber 68 through a small port 94 when the valve 14 is moved upwardly beyond the position in which his shown in Fig. 3. The valvealso controls an exhaust port 96 through which air is conducted from the lower ends of the cylinders to the exhaust passage 82. The port- 94 is smaller than the port 66 leading to the upper ends of the cylinders to prevent the tack drivers from being retracted so rapidly as to involve danger of breakage of parts.

The valve 14 is operated by downward and upward movements of a substantially semi-circular horizontal plate 98 (Figs. 3, 7 and -8) through which-an-enlarged lower section Hill of the rod '15 extends, the valve being moved downwardly I ends to forwardly extending arms of a pair of '75 bell-crank levers H2 mounted-to swing on studs rods "18 are pivotally connected at their lower IIIkonthe-frameand therods H arepivotally connected' at their lower ends to forwardly extending arms of another pair of bell-crank levers: II6;fast on a'rockshaft H8; Upwardly extending arm of a bell-crank lever 1-124 mounted to turn on a'shaft I26 on the frame, and-the other armof the-bell-crank lever I24 carries'a roll I 28 in engagement with'the periphery of a cam I 30 on the-cam shaft 6. A'spring I32 connected to the bell-crank lever I24 holds the roll against the cam and,iwhen"permitted by a-drop I34 on the cam, moves the plate 98 downwardly to movethe valve 14 into position to admit compressed air through the port 66 to the upper ends of the cylinders" 52 for operating the tack drivers. The spring I02 (Fig. 3) permits the plate $i8t0ib6mOVd farther downwardly, for a purpose hereinafter'explained, after the valve has been stopped in the proper position by engagement of the flange 86 on the rod'16 with the. casing I0. After the driving of the tacks a rise I36 on' the cam I36 moves the plate 98 an'd'the valve upwardly to open the upper ends of the cylinders 52 to the exhaust passage 82 and to admit air to the lower ends of the cylinders through the port 94 to retract the drivers, the valve closing the exhaust port'96. Thereafter a short drop I38 on the cam causes the valve to return to the positionin which it is shown in Fig. 3. in which the port 94 is covered by the valve and both ends of the cylinders are open to the exhaust passage 82.

The blocksdllon the lower ends of the piston rods 50 are guided in their downward and upward movements by a substantially semi-circular extension I40v (Figs. 3, and 6) of the casting 5A3, portions of the blocks lying in guideways I42 in the-extension. Pawls I 44 pivotally mounted on holders I46 which are secured to the extension I40 are normally held by springs I 46 with their upper ends under the blocks 48 and against the extension Mll'adjacent to the uideways. Even though compressed air is admitted, therefore, to the upper ends of the cylinders 52, operation of the tack drivers is prevented by the pawls until.

they are moved out from under the blocks For thus operating the pawls to release the blocks the plate 98 carries a plurality of L-shaned members I 50 arranged to engage tail portions I52 oi the pawls and thus to swing the pawls out from under the blocks in response to continued downward movement of the plate 98 after the valve 14 has opened the port 66 to the chamber 68. In order to avoid such increase of pressure of the toe end of the shoe on the toe rest III as would result from simultaneous operation of all the tack drivers, and also to restrict the amount of compressed air needed at any one time to operate the pistons 56, the construction shown is such that some of the drivers are operated respectively at difierent times. Each of the L-shaped members I50 is provided with a stem I54 extending downwardly through a hole in the plate 98, and threaded on the stem below the plate is a nut As illustrated, the member I50 controlling the pawl associated with the end tacker, i. e., the one which drives the tack at the extreme end of the toe, is held by its nut I56 in fixed relation to the plate 68'-.(Figs.'3 and l), whilethe nuts associated with the other members 'I50are spaced more or less below-the plate. Accordingly; the end tacker is the first to-drive'its tack, the driving of -the othertacks being delayed until such'times as the plate 68 engages thecorresponding nuts I56 and operates the respective pawls. The springs I63 are of 'suflicient strength to support the other members I50 whil'estill maintaining the pawls in their operative positions until the plate 98 has moved downwardly along the stems I54 to engage the'nuts I56; It will beevident-that these nuts may be so adjusted as to'cause the tacks to be.

driven in'anydesired order. Preferably, as illustrated, the two tackers'located at opposite sides respectively of the end tacker drive their tacks simultaneously after the driving of the end tack, after which the next two tackers operate'simultaneouslyandso on until'all the tacks are driven. Also threaded on all'the stems I54 except the middle one are locknuts I58 for holding the nuts I 56 fin adjusted positions.

All theL-shaped members I50 except the one associatedwith the end tacker are maintained in proper relationitoithe corresponding pawls I56 by forked members I60" (Figs. 4:and5) supported by the fixed p1ate'88 and extending downwardly at opposite "sides of the L-shapedmembers. All the forked membersexcept'the two members associated with the tackers which'are next adjacent to the end tacker are provided with stems I62 extending upwardly through the plate Stand havingfastton their upper ends handles I as (see Fig. 2). A spring I66 (Fig. 4) confined between each of these forked members and a washer I68 engaging the lower faceof the plate as provides rgear I16 (Fig.4) from which a stem :bearing in the sufficient friction between the plate and the washer and also between the plate and the hub of the-handle I64 to prevent the member I66 from 'turningtoo freely. In-this manner the corresponding L"-shaped members IEII'are maintained in proper relation to the respective pawls the hub of eachhandle I6 l'having thereon a projection' I10 (Fig. 2) arranged to engage the side of the casting 54 to determine the proper position of the forked'memb'er I605 Each of the two forked. members I 60 associated with the tackers which arenextadjacent to the end tacker has an upwardly extending portion'mounte'd 'to turn in a plate 80," and in this upwardly extending-portion is threaded a screw H2 (Fig. 5) the head of which'is mounted'in a recess in the plate 88 to support the member rotatably. Formed on this member are gear teeth I'I I engaged by a II'a extends upwardly-through a bearing in the plate handle I being fast on the upper end of this stem. A'spring I82 between each gear I76 and washer I84 engaging the plate 33 provides fric- ISII in proper relation tothe pawl "It l which it controls, the'proper position of the forked member I66 be ing. determinedbya pin I86 (Fig. 2) in engagement with a lug I88on the hub of the handle In addition to maintaining the members I56 in operative relation to the pawls I5 3 which they controlgthe forked members I60 may be turned by thehandles I64, I80 associated therewith to move-any of the corresponding members I60 selectively into such operatethepawls to'release the correspondin tack drivers when the plate-6e is moved down wardly. The member: I 56 'associatedwith the end tacker-may, however, be turned and held in such a position that it will-notoperate*thezcorrespond positions that'they will not ing pawl. In this manner the number and arrangement of the tacks which are driven may be varied at will by rendering diiferent tack drivers selectively inoperative. It will be evident that when any such drivers are rendered inoperative delivery of tacks to the corresponding tack holders also should beprevented. This may be done, for example, by disconnecting the flexible tack-delivery tubes 35 from those tack holders and providing a suitable receptacle to catch the tacks delivered from those tubes.

The manner of operation of the machine, in so far as it is of interest with reference to the present invention, will now be briefly summarized, the operation of the machine as a whole being more fully described in the previously mentioned copending application. The operator presents the shoe to the machine in the position determined by the plate 2 and the end gage 4, positioning the margin of the toe end of the upper in the several grippers, and then starts the machine by actuation of the clutch B through a treadle (not shown) Substantially at the beginning of the cycle of operations the toe rest H1 is moved upwardly to clamp the shoe against the plate 2, and near the beginning of the cycle also the heel rest I2 is moved rearwardly into engagement with the heelend face of the shoe. Substantially as soon as the shoe is engaged by the toe rest the grippers are closed on the margin of the upper and they are then moved upwardly to pull the upper, the end gage 4 being withdrawn from operative position. In proper time relation to the movements of the grippers the wipers 2!! are advanced and closed to engage the upper about the toe end of the last and are moved upwardly to wipe the upper heightwise of the last. Thereafter the wipers are further advanced and closed to wipe the marginal portion of the upper inwardly over the insole, the grippers releasing the upper and being moved to positions where they will be out of the way of the tackers. Before the completion of the inward wiping movements of the wipers the mechanism hereinbefore referred to for positioning the tackers begins to swing them inwardly toward positions over the shoe bottom and to move the tack holders 24 downwardly, these movements of the tackers being completed and the lower ends of the tack holders being seated in the recesses M! (Fig. 9) in the wipers after the completion of the movements of the wipers. At this point the machine preferably comes to a stop for reasons ex lained in the previously mentioned application. If the operations thus far have been satisfactorily performed, the operator again starts the machine to cause it to complete its cycle and drive the tacks. Immediately after such starting of the machine the tacker-controlling plate 98 begins to move downwardly, first operating the valve 14 to admit compressed air through the port 65 above all the driver-operating pistons 56, the lower ends of the cylinders 52 being open to the exhaust passage 82, and then by its engagement with the nuts I56 causing the L-shaped members I59 to operate the pawls M4 and thereby to release the driver-operating pistons in the order predetermined by the adjustments of the nuts I56. If any of the members l5 l have been turned to such positions as to prevent them from acting on the pawls, the corresponding drivers remain idle. As herein illustrated, the end tacker is first operated and thereafter different pairs of tackers in succession in the manner previously explained. It will be understood that each piston, upon its release by the corresponding pawl, is

immediately forced downward by the compressed 1 air above it to drive the corresponding tack and to clinch it on the usual metal plate on the bottom of the last (Fig. 9). After the driving of the tacks 5 the parts of the machine are returned in the proper order to starting positions. In this portion of the cycle the valve 14 is movedupwardly by the plate 98 far enough to admit compressed air through the restricted port 94 to cause the return of the pistons 56 into positions where they are again held by the pawls M4, the upper ends of the cylinders 52 being simultaneously put into communication with the exhaust passage 82. The valve M then receives a short downward movement to cover the port 94 and to leave both ends of the cylinders in communication with the exhaust passage. It will be understood that in the return of the tackers to starting positions the several tack holders 24 are lifted clear of the wipers before the latter receive their retractive movements.

Having described the invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, means for holding said drivers initially against movement by the fluid, and additionalmeans for releasing the drivers in such order as to drive different fastenings respectively at diiferent times.

2. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, devices associated respectively with said different drivers for holding them initially against movement by the fluid, and means for operating said devices to release the drivers in such order as to drive difierent fastenings respectively at different times.

3. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, means for holding said drivers initially against movement by the fluid, and additional means for releasing the 45 drivers in such order as to drive diiferent pairs of fastenings in succession.

4.. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated members associated respectively with diiferent 50 drivers for operating them, means for subjecting all said members to the pressure of operating fluid at one time, means for holding the members initially against movement by the fluid, and additional means for releasing the members in such 55 order as to cause different fastenings to be driven respectively at difierent times.

5. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated members associated respectively with different 60 drivers for operating them, means for subjecting all said members to the pressure of operating fluid at one time, devices associated respectively with.

said different members for holding them initially against movement by the fluid, and means for operating said devices to release the members in such order as to cause different fastenings to be driven respectively at diflerent times. 6. In a fastening-inserting machine, a pluralit of drivers for driving fastenings,. fluid-operated members associated respectively with different drivers for operating them, means for subjecting all said members to the pressure of operating fluid at one time, means for holding the members ini- 75 tially against movement by the fluid, and additional means for releasing the members in a variably predetermined order.

'7. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated pistons associated respectively with different drivers for operating them, cylinders in which said pistons are movable, means providing a passage in open communication with all said cylinders, a valve for admitting operating fluid to said passage, means for holding the pistons initially against movement by the fluid thus admitted, and additional means for releasing the pistons in a predetermined order.

8. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated pistons associated respectively with different drivers for operating them, cylinders in which said pistons are movable, means providing a passage in open communication with all said cylinders, a valve for admitting operating fluid to said passage, devices arranged to hold said pistons initially against movement by the fluid thus admitted, and means for operating said devices to release the pistons in such order as to cause different iastenings to be driven respectively at different times.

9. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated pistons associated respectively with diflerent drivers for operating them, cylinders in which said pistons are movable, means providing a passage in open communication with all said cylinders, a valve for admitting operating fluid to said passage, devices arranged to hold said pistons initially against movement by the fluid thus admitted, and a member movable to operate said valve to admit the fluid and further movable thereafter to operate said devices to release the pistons in a predetermined order.

10. In a fastening inserting machine, a plurality of drivers for driving fastenings, fluidoperated pistons connected respectively to the different drivers, cylinders in which said pistons are movable, means for admitting operating fluid to opposite ends of said cylinders to operate and to return the drivers respectively, devices for holding the pistons against operative movements after the drivers have been thus returned, and means for operating said devices to release the pistons in a predetermined order for the driving of the next fastenings.

11. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, and means for preventing the fluid from operating one or more of said drivers selectively to vary thereby the number of the fastenings driven.

12. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated members associated respectively with different drivers for operating them independently of one another, and means for holding one or more of said fluid-operated members selectively against movement by the fluid to vary thereby the number of the fastenings driven.

13. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, controlling means for holding said drivers initially against movement by the fluid, and additional means for thereafter releasing the drivers to render the fluid efiective to operate them, said additional means being adjustable to prevent such release of one or more of the drivers and thus to vary the number of the fastenings driven.

14. In a fastening-inserting machine, a plurality of fluid-operated drivers movable independently of one another to drive fastenings, devices associated respectively with said drivers for holding them initially against movement by the fluid, and members movable to operate said devices in a predetermined order to release the corresponding drivers, said members being mounted for movements selectively into positions to prevent them from thus operating said devices.

15. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated members associated respectively with different drivers for operating them, means for subjecting all said members to the pressure of operating fluid at one time, controlling means for holding the members initially against movement by the fluid, and additional means for releasing the members in a predetermined order, said additional means being adjustable to prevent such release of difierent members selectively.

16. In a fastening-inserting machine, a plurality of drivers for driving fastenings, fluid-operated members associated respectively with different drivers for operating them, means for subjecting all said members to the pressure of operating fluid at one time, devices arranged to hold said members initially against movement by the fluid, and controlling members for operating said devices in a predetermined order to release the corresponding fluid-operated members, said controlling members being mounted for movements selectively into positions to prevent them from acting on the corresponding devices.

17. In a fastening-inserting machine, a plurality of drivers movable independently of one another to drive a corresponding number of fastenings into the bottom of a shoe in a group extending around an end portion of the shoe bottom, and means for selectively preventing operative movements of any of said drivers to vary thereby the number and arrangement of the fastenings driven.

18. In a fastening-inserting machine, a plurality of drivers arranged to drive a corresponding number of fastenings into the bottom of a shoe in a group extending around an end portion of the shoe bottom, fluid-operated members associated respectively with said difierent drivers for operating them independently of one another, and means for holding any of said members selectively against movement by the fluid to vary thereby the number and arrangement of the fastenings driven.

FRED C. EASTMAN. PHILIP E. BURBY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,546,819 Bagshaw July 21, 1925 1,821,966 Goddu Sept. 8, 1931 1,967,282 Boynton July 24, 1934 2,273,268 Hunter Feb. 17, 1942 2,420,290 Willhavck May 13, 1947 Certificate of Correction Patent No. 2,490,901 December 13, 1949 FRED O. EASTMAN ET AL.

It is hereby certified that errors appear in the printed specification of the above numbered patent requiring correction as follows:

Column 1, line 33, for the word presence read pressure; column 5, line 42, after semi-circular insert downward; column 6, line 74, for however read moreover;

and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oifice.

Signed and sealed this 2nd day of May, A. D. 1950.

THOMAS F. MURPHY,

Assistant Oomjz'saicner of Patents.

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