US1224450A - Horn for fastener-inserting machines. - Google Patents

Description

S. A. DOBYNE. HORN FOR FASTENER msammc MACHINES. APPLICATION FILED FEB. 21.19M-

Patented May 1, 1917.

1224,4509 H n m I "momma WASHINGTON. n c

S. A. DOBYNE.

HORN FOR FASTENER INSERTING MACHINES.

2 SHEETS-SHEET z.

Patented May 1 STEPHEN A. DOBYN E, OF ST. LOUIS, MISSOURI, A-SSIGNOR T0 CHAMPION SHOE MACHIN- ERY COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

HORN FOR FASTENER-INSERTING MACHINES.

Specification of Letters Patent.

Patented May 1,1917.

To all whom it may concern:

Be it known that I, STEPHEN A. Bowman,

pressed during the feeding of the work, and i is released during the insertion of the awl and during the driving of the fastener. In order to remove the work, it is necessary to depress the horn a suflicient amount so as to permit the work. which is usually a shoe, to be removed from the horn. The horn must, therefore, be depressed a considerable distance at this time. A. treadle is provided for the purpose of depressing the horn to remove the work, and since the spring must be strong in order to firmly support the work against the action of the awl and driver, considerable force is necessary to depress the horn. Where the operator must depress the horn hundreds of times a day, he will become very fatigued.

In the operation of a fastener inserting machine, after the work has been placed on the horn, the horn must be restored to raised position and the machine must thereafter be started to insert the fasteners. There such a machine is provided with two treadles, one

for the horn and the other for the clutch, the

operator will first depress the horn by the horn treadle, place the sleeve in position, release this treadle to permit the spring to raise the horn, and will then place his foot on the clutch treadle to start the machine. After the completion of the fastener inserting operation on the work, the operator will first remove his foot from the clutch treadle, and then place his foot on the horn treadle to depress the horn, to permit removal of the work.

Some of the objects of this invention, therefore, are to provide a horn mechanism which is so constructed and arranged that the horn can be dropped with the minimum of effort on the part of the operator, and whereby this horn mechanism is so interconnected with the clutch, that the operator may by a single movement, at the completion of the fastener inserting operation on the work, throw out the clutch to stop the machine and simultaneously drop the horn. 3

Another object is to construct horn mechanism which is controlled by a single treadle interconnected with the horn mechanism and the clutch, which upon depression will raise the horn and simultaneously engage the clutch, and which upon release thereof will automatically throw out the clutch and simultaneously cause the horn to drop.

Another object is to provide a novel automatic horn controlling mechanism which is independent of the manually or treadle controlled mechanism. '7

Further objects will appear from the detail description taken in connection with the accompanying drawings in which:

Figure 1 is a. side elevation of a fastener inserting machine embodying this invention,

Fig. 2 is a detail vertical section through the column, showing the automatic horn controlling mechanism in elevation,

Fig. 3 is a section on the line 3, Fig. 2, showing the mechanism in elevation,

Fig. 41 is an end elevation of Fig. 2,

Fig. 5 is a section on the line 5-5, Fig. 3,

6 is a perspective view of one of the pawls,

Fig. 7 is a perspective view of the cam plate for throwing out the pawls,

Fig. 8 is a vertical section showing the manually controlled mechanism for the horn, and

Figs. 9 and 10 are details, Fig. 10 being a section on line 1010, Fig. 9.

Referring to the accompanying drawings, 10 designates a column which has mounted thereon ahead 11 carrying the fastener inserting mechanism, which may be of any suitable type. The head. carries a main drive shaft 12, which is provided with a belt pulley 13, a clutch 14, a clutch shifting wedge 15 and a brake 16. All these parts may be of the usual construction.

The horn spindle 20 has a vertical bearing in the column 10, and is provided with a horn 21 of the usual construction. This spindle has mounted thereonan externally threaded sleeve 22, having a head 23 pinned to the spindle, and provided with nuts 24; and 25 threaded on the sleeve to furnish an abutment for a strong spring 26. The other end of the spring bears against the movable abutment comprising an elongated sleeve 27 having a bearing in the boss 28 on a bracket 29 bolted to the column. The horn spindle 20 has a slidable bearing in the abutment 27, and this spindle is provided at its lower end with a reduced threaded end 52 adapted to receive a rectangular block 30, threaded and pinned to the spindle and bearing against the shoulder! formed on the spindle. This block bears at each end against the sides 31 of rectangular recesses formed in the abutment 27 in' order to keep thehorn spindle from turning. The abutment 27 has pivoted thereto a link 32 which is pivoted to one arm 33 of a bell-crank lever, having a second arm 34: connected to the arm 33 by a strengthening web or brace 35. This bell-crank lever is pivoted between arms 37 extending from the bracket 29. The arm 32L is connected by a link 38 to a treadle 39, which is pivoted at 40 to the base of the column. A. rod 41 pivotally connected at one end to the treadle, passes through the base of the column, and is provided with a spring 42 bearing at one end against the column, and at the other end against an adjustable nut and washer 43.

The rear arm of the treadle is pivotally connected to a yoke 4A embracing the counter shaft 45, and having a bore 16 adapted to receive the end of the clutch rod 47, which is provided with the usual spring 48. The clutch rod is provided with stop nuts 19 adapted to engage the yoke M, and with stop nuts adapted to engage a bracket 51 on the machine head 11.

The horn spindle has rigidly mounted thereon a sleeve 55, which is provided with blocks 56 for engaging the fork 57 on one arm 58 of a lever pivoted at 59 on the column, and having a segmental part 60 channeled to receive a toothed rack 61. A pair of arms 62 and 63 are pivoted at 59 on each side of the lever 58-59, and the arm 62 is provided with an integral segmental part 6% extending over the segmental part 60 and pinned to the lever 63. A plurality of pawls 65 are pivoted in recesses 66 in the segmental part (a, so as to engage the rack 61, and these pawls are pressed into engagement with the rack by means of plugs 67 moved by springs 68 in bores formed in lugs 69 on the segmental part 64-, and eachhaving an adjustable screw abutment 70. The part 64 is provided with spaced ears 71 adapted to receive a block 72, having a bearing on a pin 73 connected to the lower end of a rod 7 1-. The rod 74 .with the cams 79.

is connected to a lever 75, pivoted on the machine head, and oscillated by a cam wheel 76 on the drive shaft 12. A plate 77 is mounted on a lug 73 on the column, and this plate is provided with cams 79 adapted to be engaged by projections 80 extending laterally from the pawls 65.

The operation of the machine is as follows:

When the treadle is depressed, as shown in the drawings, the link 32 and the arm 33, which form the two members of a toggle, will be straightened so as to hold the abutment 27 in raised position, thereby causing the horn together with its spring to be carried to its highest position. In this position of the treadle the yoke 4:4: is also raised, so as to cause engagement of the stops as with the upper end of the yoke to hold the clutch rod 4:7 in raised position and throw in the clutch to operate the ma chine. During the operation of the machine, the horn is supported by a strong spring 26 in the usual manner, and is depressed by the automatic horn-depressing mechanism operated from the drive shaft through the arm 7 5 and the cam 76. The operation of this automatic device is obvious. Oscillation of the arm will cause oscillation of the lever 62-63, the pawls thereon will, during the movement of the lever 6362, engage the rack 61 to depress the horn, and these pawlswill be moved out of engagement from the rack during the return or downward movement of the lever 62*63 by engagement of the projection 30 During this automatic movement of the horn, the lower end of the horn spindle will slide in the abutment 27.

If, after the work has been completed, thetreadle is now released, the spring 4:2 will raise this treadle so as to release the clutch, and through the link connection 38 with the bell-crank lever break the toggle" connection 3233, so as to cause the abutment 27 together with the spring and the horn thereon, to drop a suflicient distance to permit the work to be removed from the born. The parts are so constructed and arranged that the clutch will be thrown out before the toggle is broken sufiiciently to lower the horn. This is accomplished as follows: When the treadle is completely depressed, the center toggle joint will be moved slightly over the center until stopped by the adjustable screw 53. The first movement of the treadle will, therefore, cause the rod 47 to belowered a suflicient distance to throw out the clutch before the toggle is broken sufficiently to drop the horn. Similarly, when the treadle is depressed, the horn is raised to its highest position, and at the end of this movement, the clutch is thrown. This is accomplished as follows: When the treadle is raised, and when the toggle is broken, the yoke 44 will drop with the treadle arm connected thereto, while the clutch rod 4:? will be stopped by the engagement of the stop 50 with the bracket 51. Toward the end of the treadle depressing movement, the yoke 4 will engage the stop 49 and engage the clutch, while the toggle joint is nearing or just passin over its center. The machine is rovided with the usual clutch and brake, which stops the mechanism in position with the lever 6263 in its lowest position, so that the pawls 65 are in engagement with the cams 19 to throw these pawls out of engagement with the rack 61. In this way the horn may be moved freely while the machine is at rest, especially since the clutch is only thrown at the end of the movement of the treadle.

It will therefore be seen that the invention accomplishes its objects. The horn controlling mechanism is so constructed and arranged that the horn may be lowered and raised with the minimum effort on the part of the operator, in view of the fact that the greatest resistance encountered is near the end of the upward movement of the horn, at which time the toggle members are nearly straight, so that the leverage is at this time the greatest. The horn is dropped automatically upon releasing this treadle, so that the horn will always be in lowered position at the time when the machine stops. At the same time, the horn can be raised to position the work preliminarily, since the clutch is thrown at the very end of the movement of the treadle, and the horn can, therefore, be held in raised position without starting the machine, after a little practice by the operator. After the horn is raised, the spring is supported by an abutment, which is in turn supported by toggles which are straightened, and the pressure will, therefore, come on the toggle links, and not on the treadle, so that the operator need not exert undue pressure on this treadle during the operation of the machine. The automatic mechanism is simple in construction and effective in its operation. By arranging the parts as shown the pawls as well as the rackmay be made wide and deep, in order to resist the heavy spring, so that stripping of the pawls, and ratchet will be prevented. It will be noted, of course, that the pawls are placed in such relation that one will engage the teeth, while the other is midway between two teeth, so as to permit fine adjustment. It will be noted that when the horn is raised, the automatic mechanism is connected to the spindle above the manually controlled mechanism, and is, therefore, independent thereof, so that it is not necessary to move this heavy manually controlled mechanism up and down. This is of great advantage, since it is highly desirable to keep the Weight of the moving parts down to a minimum so as to reduce the inertia of the moving parts as much as possible.

It is obvious that various changes may be made in details of construction without departing from the spirit of this invention, and it is therefore to be understood that this invention is not to be limited to the specific construction shown and described.

Having thus described the invention what is claimed is:

1. In a machine of the class described, a, machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, means operating intermittently during the operation of the machine for depressing said horn against the action of said spring, a movable abutment for said spring and slidable in said frame, and manually controlled means constructed and arranged to move said abutment to one position adapted to raise said horn and to another position adapted to drop said horn.

2. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position,

means operating intermittently during the operation of the machine for depressing said horn, a movable abutment for said spring and slidable in said frame, a treadle, and means connecting said treadle to said abutment.

3. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, means operating intermittently during the operation of the machine for depressing said horn again the action of said spring, a movable abutment for said spring and slidable in said frame, a horn spindle slidable in said abutment, and a treadle connected to move said abutment adapted to raise and lower said horn.

4. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, mechanism having a connection to said horn above said. spring for intermittently depressing said horn against the action of said spring. and a treadle connected with said abutment and adapted to raise and lower said horn.

5. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, mecha nism for intermittently depressing said horn against the action of said spring, treadle, a bell crank lever mounted in said frame and connected with said treadle, and a link connecting said abutment and said bell crank lever.

6. In a machine of the class described, a machine frame, a drive shaft, a clutch therefor, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, mechanism for intermittently depressing said horn against the action of said spring, a treadle, and connections from said treadle to said clutch and said abutment adapted to raise said horn and engage said clutch.

7. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a. movable abutment for said spring, said horn having a bearing in said abutment, mechanism for intermittently depressing said horn against the action of said spring, and a treadle connected with said abutment and adapted to raise and lower said horn.

8. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, said horn having a bearing in said abutment, a stop between said horn and said abutment adapted to limit the upward movement of said horn, mechanism for intermittently depressing said horn against the action of said spring, and a treadle connected with saidabutment and adapted to raise and lower said horn.

9. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, mecha nism for intermittently depressing said horn against the action of said spring, a treadle, connections between said treadle and said horn adapted to cause said treadle to raise said horn, and a stop adapted to engage said connections and position said horn in raised position.

10. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, mechanism for intermittently depressing said horn against the action of said spring, a treadle, connections between said treadle and said horn adapted to cause said treadle to raise said horn, and an adjustable stop adapted to engage said connections and adjustably po sition said horn in raised position.

11. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, a bracket mounted on said frame and forming a bearing for said abutment, mechanism for intermittently depressing said horn against the action of said spring, and a treadle connected with said abutment and adapted to raise and lower said horn.

12. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, a bracket mounted on said frame and forming a bearing for said abutment, mechanism for intermittently depressing said horn against the action of said spring, a treadle, and operating connections between said treadle and said abutment and mounted on said bracket.

13. In a machine of the class described, a machine frame, a horn or work support having a bearing in said frame, a spring for maintaining said horn in raised position, a movable abutment for said spring, a bracket mounted on said frame and forming a bearing for said abutment, mechanism for intermittently depressing said horn against the action of said spring, a treadle, operating connections between said treadle and said abutment and mounted on said bracket, and a stop on said bracket adapted to engage said connections.

14. In a machine of the class described, a horn or work support, a spring for maintaining said horn in raised position, a drive shaft, mechanism controlled thereby for depressing said horn periodically against the action of said spring, a clutch for said shaft, a treadle connected to shift said clutch, and an operating connection between said treadle and said horn extraneous of said depressing mechanism, adapted to raise said horn when said clutch is shifted to start the machine.

15. In a machine of the class described, a horn or work support, a spring for maintaining said horn in raised position, a drive shaft, a mechanism controlled thereby for depressing said horn periodically against the action of said spring, a clutch for said shaft, a treadle connected to shift said clutch, and a yielding operating connection between said treadle and said horn eX- traneous of said depressing mechanism, adapted to raise said horn when said clutch is shifted to start the machine.

16. In a machine of the class described, a horn or work support, a spring fOr maintaining said horn in raised position, a drive shaft, mechanism controlled thereby for depressing said horn periodically against the action of said spring, a clutch for said shaft, a treadle "connected to shift said clutch, and a connection between said treadle and said horn and operating through said spring, adapted to raise said horn when said clutch is shifted to start the machine.

17. In a machine of the class described, a horn, a spring adapted to raise said horn, and horn depressing mechanism comprising a pivoted arm connected to said horn and having a rack thereon, a second pivotally mounted arm having a plurality of pawls arranged circumferentially thereon constructed to engage said rack to depress the horn, means for operating said second arm, and means for automatically disengaging said paWls from said rack during each cycle of operation of the machine,

adapted to release said horn and permit the' spring to raise it into clamping engagement With the Work.

18. In a machine of the class described, a horn, a spring adapted to raise said horn, and horn depressing mechanism comprising a pivotally mounted arm connected to said horn and having a rack thereon concentric with the pivot of said arm, a second arm pivoted concentric With said first arm and having a plurality of pawls arranged circumferentially thereon constructed to engage said rack to depress the horn, means for oscillating said second arm, and means for automatically disengaging said pawls from said rack during each cycle of operation of the machine, adapted to release said horn and permit the spring to raise it into clamping engagement with the Work.

19. In a machine of the class described, a horn, a spring adapted to raise said horn,

and horn depressing mechanism comprising a pivoted arm connected to said horn and having a segmental rack thereon, a second pivotally mounted arm embracing said first arm and having a plurality of paWls thereon constructed to engage said rack to depress the horn, means for operating said second arm, and means for automatically disengaging said paWls from said rack during each cycle of operation of the machine, adapted to release said horn and permit the spring to raise it into clamping engagement with the Work.

20. In a machine of the class described, a horn, a spring adapted to raise said horn, and horn depressing mechanism comprising a pivoted arm connected to said arm and having a segmental rack thereon, a second pivotally mounted arm having a segmental part extending over said rack, a plurality of paWls arranged along said segmental part and adapted to engage said rack to depress said horn, means for operating said second arm, and means for automatically disengaging said paWls from said rack during each cycle of operation of the machine, adapted to release said horn and permit the spring to raise it into clamping engagement with the Work.

In testimony whereof I aifix my signature in the presence of these two Witnesses.

GEORGE AUSTIN, WM. H. OHAMBERLIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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