US917269A - Machine for drilling stay-bolts and similar work. - Google Patents

Description

MACHINE I APPLICATION FILED HA3- 7, 1907.

Patented Apr. 6, 1909.

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WITNESSES: 211 7046 8 flwmwq/ J. A. EDEN, Jn. MACHINE FOR DRILLING STAY BOLTS AND SIMILAR WORK.

APPLIOATION FILED MAB. 7, 1907.

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FIG; 2.

INVENTOR WITNESSES: M

J. A. EDEN, JR. MACHINE FOR DRILLING STAY BOLTS AND SIMILAR WORK.

APPLIUATION FILED MAE. 7, 1907.

Patented Apr. 6, 1909.

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INVENTOR WITNESSES:

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AP PLIGATION FILED MAR- 7, 1907.

Patented. Apr. 6, 1909.

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INVENTOR 0 .J k N WOW i h k a a .5 [l j H 9 m fl Ad E N i i "0 W o. :zMW w WW 0/ W WITNESSES:

UNITED STATES PATENT OFFICE.

JAMES A. EDEN, 1a.,

'MACHINE FOR DRILLING STAY-BOLTS AND SIMILAR WORK.

Specification of Letters Patent.

Patented April 6, 1909.

Application filedv March 7, 1907. Serial No. 361,074.

To all whom it may concern:

Be it known that I, JAMES A. EDEN, Jr., a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Machines for Drilling Stay-Bolts and Similar Work, of which the -following is a specification.

Stay-bolts,for'boilers are ordinarily attachedto the opposite plates of a boiler, and are drilled from the outer end inwardly a suflicient distance to permit the escape of water or steam when a bolt breaks between the two plates, and thus to indicate the fact of a break.

The present machine is designed to receive bolts, such, for example, as the square-headed center-punched bolts or blanks made in the machine described in vmy application for patent for machines for making stay-bolts or the like pending concurrently herewith; and to drill a sufliciently long hole in the outer ends of said bolts.

The complete machine includes a recepta .cle 1n whlch the bolts are made to assume positions and to roll on to a carrier parallel upon which they are clamped and carried in succession to points in line with one or more drills. The drills are advanced and withdrawn at the proper times, and the bolts are then carried to a position at which the manner of use.

they are ejected from the carrier.

The machine operates with great rapidity and accuracy, the output being many times 'as great as that of apparatus previously used for such work.

Other points of advantage are referred to in detail hereinafter.

The accompanying drawings illustrate a machine embodying the invention.

Figure 1 is a plan of the complete machine. Fig. 2 is an end elevation of the same, partly broken away. Fig. 3 is a diagram of the finished product of the machine, showing Fig. 4 is a side elevation of the complete machine, omitting the feed tray. Fig. 4 is a detail. Fig. 5 is a transverse section approximately on the line ranged parallel to each -eral bolts on one another, as shown.

5-5 of Figs. 1 and 4. Fig. 6 is a diagram of the escapement mechanism for the carrier.

Referring to the embodiment of .the

invention illustrated, the bolts A are arother in a pile in a rece tacle such as the tray B, from which they. are fed to an intermittently rotating carrier, which I designate as a whole by the letter C. This carrier moves each bolt in succession to a plurality of drills, such, for example, as the three drills D, E and F. The first drill I) enters say one-third of the desired distance, and is then withdrawn, after which. the second drill extends the holea third of the distance farther, after which the third drill enters to the final depth. This division of work not only saves the drills, but permits of working on a plurality of bolts at once, and discharging them at a rate ap roximately three times as great as if all t e work had to be done by a single drill.

As shown in Fig. 3, the bolt A is designed to fasten together an inner boiler plate G and an outer one H, and is provided with a cen tral hole J extending from the outer end to well within the space between the two plates.

The bolts maybe carelessly stacked in the tray B, approximately parallel with each other. The feeding from this point is automatic, so that no skill is required to attend the machine. The tray is pivoted at K, and its outer end swings down about 15 degrees and up again slowly. The upward movement of the outer end of the tray rolls the bolts into a guide or trough L, keepingthe latter filled. The downward movement of the outer end of the tray is below the level of the pivot and throws the bolts into the back of the tray, clearing the hinge and relieving the bolts in the trough L from the pressure.

OF NEW YORK, Y2, ASSIGNOR- 'l() E. W. BLISS COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

The drawings, Figs. 2 and 4, show the tray in the middle position of its oscillation. To

end is made higher than the diameter of a single bolt, preferably of a height equal to sev- This rolling of the bolts in the tray back and forth causes them to settle into parallel positions.

being controlled from fixed mately balancing the weight carrier C. The

The tray B is connected lg means of a link M with an operating arm .L upon a shaft 0. The link M mcludes a friction device M by which the lower end of the link isfrictionally clamped to the upper end, the joint hemg arranged to ield 1n case of any obstruction and avoid reaking of the arts. As these machines are fed by cheap abor, the blanks are thrown in in all positions, and many thin s besides blanks are occasionally thrown in, t e friction device is of great importance in connection with this oscillating tray. The shaft 0 has at" its opposite end (Fig. 4) an arm P oscillated slowly by means of a link Q connected with a crank-pin ,.upon a slowspeed gear R driven by means of a pinion S upon a shaft T which is rotated by means of a worm ear U anda-worm'V upona longitudinal s aft W upon. which is splined a large gear X rotated by-means of a inion Y upon the driving shaft Z of the macliine, the latter and loose 'belt pulleys a and b. The arm N is extended and provided with a counterweight c approxi- 'of the tray B and its contents. The trough L is preferably fixed, and inclined sharply downward to the tray B has a fixed upwardly projecting side 01 serving as a stop to determine the endwise position of the bolts in the tray, and to insure that the bolts shall be properly positioned for the drills. In order to provide for bolts of greater or less length, the opposite side (1 of the tray is made adjustab e, as by means of the slots and screws shown, or in any other suitable way. A similar arrangement of one fixed side 0 and one adjustable side e is provided for the guide or trou h L, and the latter is provided with over anging flan es ff or similar devices for holdingthe bo ts down against their tendency to bunch up under the effect of their own weight.

The carrier C consists of a pair of heads mounted upon a shaft 9 and having peripheral sockets in which the ends ofthe bolts rest. Each head consists .of a pair of plates, 72 h res ectively, which are angularly ad justa le re atively to each other, as by means of a set of holes k 7' (Fig. 2) which are arranged vernierwise around the plates, so

that by bringing oneor the other set'of holes in conjunction, and introducing a dowel i they will be held in the desired position of adjustment relatively to each other. This. adjustment causes the notches in in the plates to overlap in the manner indicated, so that the effective width of the notches may be varied in accordance with the diameter of the bolts to he carried.

It is to be noted that in order to reserve the center of the bolts always at t e-same point, it is necessary toshift not merel one of the plates but both of them simu taneof a set-screw m. It is bolts from beyond the pivot O means of screws They are therefore both mounted loosely on the shaft g, and are held in proper angular position thereon by means of one or more slots 72.. in the headsl 1' respectively, through which pass bolts h screwin at fixed points throu h one of the movab e lates. he head I a ljacent to the drills is pre erabl' fixed on the s aft, while the opposite head i carrying the plates 7:. and j and projecting radially beyond them so as to form end stops or gages for thebolts, dinally on the shaft 9 and fastened by means proposed torotate the carrier C with rapid intermittent movements, and it is advisable to provide a guard such as a pair of springs n to prevent the eing' thrown out in passing from the receiving position at the top to the first boring position.

It.1s important to clamp the bolts firmly in position while they are being bored, to

prevent any lateral strain upon the drills.-

or this purpose I provide a series of'holding pins 0 p g with their ends shaped to angles approximately tangential to the carrier, and backed by strong springs 1' adjustable by sin sockets in a frame t which has a lateral reciprocating movement in a frame it rigidly mounted upon the base of the machine. The movement of the sliding frame t is obtained by a to gle mechanism. Links '0 at the upper and? the sliding frame are connected to inner arms w of a vertical shaft 2:, the shaft having a central arm y on its outer side whichis connected by means of a link z to a roller running in a cam groove 4 of a disk 2 (Fig. 1) mount ed on the slowly revolving shaft 3 and which cam groove gives the roller and the rod z the desired movements backward and forward.

The three drillsare carried on the ends of spindles 5 which are provided with hearings in fixed standards 6 and 7, and the "ends of which are mounted in a carriage 8 which is reciprocated by means of a cam 9 also on the shaft 3 and engaging a roller 9 on an ower ends of is adjustable longituarm of the carriage. They are rotated by means of small pinions 10 arranged around the drum or wide gear); the center of which corresponds with the center of the carrier for the bolts, so that the drills are concentric with this carrier. The drum X is of sufficient width to be in enga ement with the pinions 10 on 'the drill spin es 5 throughout their necessary reciprocation.

The drumli and the parts driven directly thereby are rotated continuously. A very simple mechanism is provided for transforming this continuous movement into a guick intermittent movement of the carrier The shaft 9 of the carrier is rovided on its inner end with a locking 11 and a friction disk 12. A com lementary friction disk 13 is mounted fixed shaft .W of the. drum X, and is pressed outy on the end ofthe' and ready uided springs 14, so as to forma friction c the shaft W and the shaft There is a constarit frictional engagement, and the shaft 9 receives a quick movement between its release and its'locking by an escapement provided for the purpose.

The locking plate 11 is rovided with locking notches 15 corres on ing in interval with the feeding interva s and adapted to be enga ed by a bolt 16 (Fig. 4) sliding in a suita ly fixed guide, and attached to the end of the arm 17 upon a transverse shaft 18 which is connected by means of a link 19 with an arm 20 of a lever, the other arm 21 of which is provided with a roller lying in the path of a cam 22 upon the disk 2. When the cam or tap et 22 strikes the arm 21 the'bolt 16 is with rawn, and the shaft g allowed to turn, the tappet 22 being so short that the osibolt 16 will be released and will be in tion to jump into the next notch of the ocking plate so as to hold the carrier in the next position. The locking bolt is normally pressed toward the lockmg plate 11 by means of a spring 23 (Fig. 6). Where, however, the movement ofthe carrier is very rapid, as com ared with that of the disk 2, an additiona stop may be provided for preventing the carrier from overrunning its intended interval before the locking bolt 16 can slip into place. Such a means is shown in Fig. 5, and comprises a locking pawl 24 havin an outwardly projecting arm 25 upon which bears an arm 26 on the outer end of the shaft 18. A spring 27 presses upon the arm 25 and holds the pawl 24 against the notched plate 11. Now when the locking bolt 16 is withdrawn, the pawl 24 is immediately pressed yieldingly against the plate 11, and, as the latter rotates, the hooked end of the pawl drops into the next notch, the positions being such that this action takes place intermediate between two successive positions of the disk. When the stop 22 has passed, and the locking bolt 16 is released for action, the pawl 24 is withdrawn. To permit the withdrawal of the pawl 24 while the locking bolt 16 is still held back, a spring 28 (Fig. 4*) may be introduced between the shaft 18 and the locking vbolt 16.

parts may be made by those skilled in the art without departure from the invention.

What I claim is 1. In a ma hine of the class described, a pivoted receptacle adapted to receive bolts and open at its discharge end so that bolts may roll out of said end, and havin a flat bottom and a rear wall of greater hei ht than the diameter of a bolt, .and means for oscillating it about its pivot above and below a.

horizontal position whereby bolts laid on said bottom in various positions are caused to assume positions parallel to the pivot so as to roll out of the discharge end.

2. In a machine of the class described, the combination of a fixed downwardly inclined trough L for feeding bolts to a carrier, and a tray B having its open end pivoted adjacent to the upper end of the trough L and having a fiat closed bottom upon which the bolts may be laid in various positions, and a rear wall of greater height than the diameter of a bolt, and means for oscillating said tray to cause the bolts to assume'posltions parallel to the pivot so as to roll into said trough.

3. In a machine of the class described, a movable carrier comprising two plates and having a notch for receiving a bolt and transferring it from one point to another, the opposite sides of said notch being formed by edges on the respective plates and both plates being adjustable so as to receive bolts of different diameters with their centers always in the same line.

4. In a machine of the class described, a movable carrier having two members each provided with a plurality of notches for receiving bolts and transferring them from one point to another, and one adjustable relatively to the other to cause the notches to overlap so as to reduce the effective width thereof and adapt them for bolts of different diameters. I

5. In a machine of the class described, a carrier 0 having a pair of heads with peripheral sockets for receiving bolts, a shaft g on which said heads are mounted, each head comprising a pair of notched plates h, j, and h, j, respectively, the lates of each pair being angularly adjustabfe relatively to each other to vary the effective widths of the sockets, and each head being angularly adjustable on said shaft to maintain the centers of the bolts always in the same lines.

6. In a machine of the class described, a notched carrier comprising a shaft, pairs of notched plates arranged to receive a bolt, one pair for receiving each end of the bolt, the notched plates being angularly adjustable relatively to each other, and a plate angularly fixed on said shaft and adjustably attached to said notched plates for determining their angular position on the shaft.

7. In a machine of the class described, a notched carrier,- a series of holding pins 0, p

and g, a frame t having socketsparryjng said my name in the presence of two subscribing pins, spring?i 1?- in 'sgjd sockegs pressmg saig i wltnesses.

ins outwar y, an means or movm' g sai ame toward or away from said earner to 3 JAMES EDEN 5 cause said ins to engage or to release bolts Witnesses:

in the note es of the carrier. DOMINGO A. USINA,

In witness whereof, I have hereunto signed 1 THEODORE T. SNELL.

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