US1518654A - Device for forming eyes on metal strips - Google Patents

Description

Dec. 9, 1924. 1,518,654

' G. N. HAMMOND DEVICE FOR FORMING EYES ON METAL STRIPS Filed July 11, 1923 2 Sheets-Sheet 1 IN V5 11/ TOR Q A. HA MOND,

A TTOR/VEYS WITNESSES G. N. HAMMOND DEVICE FOR FORMING EYES ON METAL STRIPS Filed July 11, 1923 2 Sheets-Sheet 2 ATTORNEYS Patented Dec. 9, 1924.

UNITED STATES PATENT, OFFICE.

GILBERT NAHUM HAMMOND, OF POMONA, CALIFORNIA.

DEVICE FOR- FOIRMING EYES 0N METAL STRIPS.

Application filed July 11, 1923.

forming eyes in metal strips, and has for its object the provision of a device which is simple in construction and positive in action and which provides for a ready detachable carriage swingably mounted on the pin that forms a part of the usual spring shackle normally engaged by the eye on the end of said spring, the pin being rcmovably held by the eye forming support.

A further object of the invention is the provision of a device having a support which is equipped with a combined holding means for the usual pin adapted to be employed in the formed eye and a gauge prer determined by the thickness of the metal strip upon which the eye is formed.

Another object of the invention is the provision of a device having a slotted support and a swingable carriage detachably mounted on the support with the hangers for the carriage movable through the slotted portion of the support.

A still further object of the invention is the provision of a device having a support equipped with a jaw adapted to rigidly grip one end of the strip of metal to be formed into an eye and adjustable toward or away from the support with means for causing the jaws to grip the metal, said means being slidable with the jaw when the same is ad justed to a predetermined position.

lVith the above and other objects in view, the invention consists of certain novelfeatures of construction as hereinafter shown and described and then specifically pointed out in the claims.

In the drawings:

Figure 1 is a view in perspective of the eye-forming device secured to a table,

Figure 2 is a vertical section longitudinallv of the same,

Figure 3 is a fragmentary plan view of the support of the eye-forming device,

Serial No. 650,926.

Figure 4 is a fragmeneary view in perspective of a strip of metal having an eye formed upon it by my device,

Figure 5 isa view in perspective of the movable guide,

Figure 6 is a perspective view of the end of the support showing the slotted formation, and

Figure 7 is a view in perspective of the gauge plate. Referring more particularly to the drawings, 1 designates a table upon which a support 2 in the form of a plate is rigidly sew cured, with the forward slotted end of the plate projecting beyond the end of the table. The forward end of the plate is provided with slots 3 and 4 forming a tongue 5 between said slots and which is bevelled at G to provide a knife edge 7. The tongue 5 falls short of the outer ends of tongues 5 and 9, with the knife edge 7, shown more particularly in Figure 2, extending to one side of the axis of a pin 10.

Extending longitudinally of the support 2 with their inner edges in alinement with the outer edges of the slots 3 and 4 are rails 11 and 12 Each of these rails are provided at their ends with bosses having vertical perforations in which are inserted threaded pins 13. Each of these pins is provided with a wing nut 1 1 rigidly connected with the pin whereby turning of the nut turns the pin. As shown more particularly in Figure 3, the pins are provided with nuts 15 engaging the underface of the rails 11 and 1.2. The pins extend entirely through the table top 1 and are locked to the table bv means of a nut 1.6. The pins have a thread ed engagement with perforations in the support or plate 2.

Midway of the end of the rails 11 and 12 are provided similar bosses having perforations through which are inserted threaded pins 17. These pins likewise extend through the table top 1, are provided with looking nuts 15 functioning in thesame manner as the nuts on the pins 13, and engage threaded perforations in the support 2. These pins are provided with wing nuts 14 rigidly connected with the pins.

At the outer ends of the rails 11 and 12 are provided bosses 18 having vertical passages. Pins 19 are inserted through these passages and extend downwardly and lo- -ated in sockets formed in the outer end of the tongues 8 and 9.

Lugs 21 projecting upwardly from the tongues 8 and S) are adapted to be inserted in perforations 22 located on the inner end of gauge plates 23. A second perforation 24 is formed midway of the ends of each plate 23 and adapted to receive the adjacent post 19. The lugs 21 and the posts 19 prevent shifting of the gauge plates. These gauge plates are interchangeable with gauge plates of varying thicknesses, the thickness of said plates being determined by the thickness of the strip 25 of metal which isadapted to be inserted in the eye-forming device with the inner end of the strip located between the horizontal pin 10 and the bevelled tongue It will be seen that the pin 10 resting on the gauge plates 23 at its outer end will be raised sufficiently above the support 2 to permit ready insertion of the strip of metal 25.

This strip of metal is held in place on the support 2 by means of a guide-bar 26. The guide bar 26 extends longitudinally of the support and is rigidly secured to its upper face and within the confines of. the alined threaded pins 13 and 17. A movable guide bar 27, which is adjustable towards or away from the other edge of the strip of metal 25, is slidable transversely of the support 1 and provided with an operating handle 28 which is held in position by means of the guide bar 29. A set screw having threaded engagement with a vertical passage in the guide 29 locks thevhandle 28 in any one of its predetermined positions with the inner. edge of the guide bar 27 in engagement with one side edge of the strip of metal 25.

vA swingable carriage 29 is provided with a pair of hangers 30 and 31 which are of a V-shaped formation and adapted to be hooked over the pin 10 as shown in Figures 1 and 2. The hangers 30 and 31 are respectively formed integrally with tracks 32 and 33. These tracks are spaced from each other and connected at their lower end to an enlarged sleeve 34 which is integrally formed with the hollow barrel 35 forming a. handle for the movable carriage 29 Movable between the tracks 32 and 33 is a cross head having upstanding arms 37 which are slidable in said tracks. A jaw 38 which is substantially V-shaped has a gripping edge 39. This jaw is provided with trunnions 40. shown in dotted lines in Figure 2, which are pivotally mounted in the opposite spaced arms 37. I

Projecting rearwardlv of the jaw 38 arelug 46 formed at one end of an operating lever 47. The lever is provided with ears 48 disposed in an opposite direction from the lug 46, with the ears pivotally mounted on a pin 49. This pin is mounted in ears 5O projecting laterally from a slidable sleeve 51 on the barrel 35.

A. cylindrical member 52 projects downwardly from the cross head 36 and is provicled with an internally threaded passage into which is screwed one end of an adjusting rod 53. At a point adjacent to the lower end of the threads 54 on the rod 53- and at the upper end of the enlarged cylindrical member 34 where the tracks 32 and 33 are connected with the member 34 is a collar 55.

The rod 53 extends entirely through the hollow barrel 35 and is provided with an operatinghandle 56 which when actuated, rotates the rod 53 and moves the cylindrical member 52, the cross head 36 and likewise the aw 38 towards or away fromthe pin 10. The sleeve 51. carrying the operating lever 41 and the operating rod 43. is likewise carri-ed towards or away from the pin 10 simultaneously with the jaw 38.

A lug 57 formed integrally with the cylindrical extension 52 depending from the jaw, projects laterally, outwardly from the tracks 32 and 33 and is movable therebetween. A. threaded perforation is provided to receive the threaded. end 58 of a rod 59. The lower end of-the rod carries an eye 60 engaged with a pin 61 mounted in cars formed on the collar 51 and above the ears 50. The rod 59 is likewise carried upwardly with the jaw 38. A spring 62 having one end con nected to the pin 61 and its other end secured to the pin 1-5 is adapted to maintain the operating lever 47 in outward relation with the barrel 35.

The operation of my device When it is desired to form an eye 63 on a strip of n'ietal, as shown at 25 in Figure 4, the guide bar 27 is moved away from the longitudinal. center line of the support 2 after the release of the set. screw 30 until the strip will fit between the guide bars 26 and 2?. locking the guide bar 27 in position. The strip of metal is moved forwardiyuntil its forward end is located slightly beyond the vertical diameter of the pin shown in Figure 2. a

The operating handle 56 is rotated until the jaw 38 is moved suiiiciently upward whereby the biting edge 39 of said jaw will engage the strip of the metal. at a point substantially in a line with the vertical diameter of the pin'lO. The lever 4 is then grasped and pressed into engagement with the barrel. when the biting edge 39 will firmly grip the end of the metal strip 25 and rotation of the carriage 29 will cause the inner end of the metal to be pulled foris as follows:

The screw 30 is then reset for fit) wardly and bent around the pin and curved into an eye, as shown at 63 in Figure l. If necessary the jaw 38 may be released from the metal and a second grip may be taken. Further oscillation of the carriage 29 will complete the eye on the metal strip 25. Before the metal is bent into shape gauge plates will be selected of the same thickness as the metal and be positioned as shown in Figure 1. This raises the pin 10 at the same height above the support 2 as is the upper surface of the plate and the upper surfaces of the gauge plates are in the same horizontal plane with the upper face of the metal strip 25.

lVhen it is desired to release the carriage 29 from its swinging position on the pin 10 the crank 56 is operated in a direction to withdraw the jaw 38 from its close association with the pin 10. The carriage 29 is located in substantially horizontal position when the hangers 30 and 31 may be released from the pin 10. The strip of metal 25 may then be readily removed from the support 2 with the pin in position in the eye. By the adjustment of the wing nuts 1-iiand 14. the rails 11 and 12 may be properly positioned horizontally in order that the outer edges of said rails will be in engagement with the ends of the pin '10 and aid in maintaining said pin in position on the support 2.

The carriage 29 may be applied to the support 2 and likewise to the pin 10 by placing the carriage in a horizontal position after the crank 56 has been rotated to withdraw the jaw 38 sufficiently from the ends of the hangers 30 and 31 when the hangers may be hooked over said pin.

It. will be noted that the hangers 30 and 31* operate in the slots 3 and 1, thereby -iern'iitting the upper end of the carriage to work at a point slightly to the rear of the forward end of the support 2 and provide for better fulcruming of the carriage 29 on the pin 10.

Vhen the crank 56 is operated for causing the cylindrical slide 52 to move towards or away from the pin 10, the sleeve 51, operating lever 47, and operating rod 13 will be carried towards or away from the pin simultaneously with the jaw 38.

lVhat I claim is:

1. A device for bending the ends of metal strips to form eyes comprising a support provided with spaced parallel slots at the forward end and running longitudinally for a portion of the length of the support, spaced rails mounted in spaced relation above the support with a rail adjacent each slot, means for adjusting the rails relative to the support, a gauge plate mounted ad jacent each slot and at the end of the support, posts removably mounted in the forward end of the rails and having connection with the forward ends of the support upon one side of the slot, the gauge plates being provided with perfo'ations adapted to receive the posts, the space between each gauge plate, forward ends of the rails and posts adapted to receive the ends of a pin around which the metal strip is adapted to be bent, a detachable carriage swingable on the pin, a jaw pivotally mounted on the carriage, means for rocking the free end of the jaw into engagement with the pin, and means for moving the jaw toward or away from the end of said carriage.

2. A device for bending the ends of metal strips to form eyes comprising a support provided with spaced parallel slots at its forward end with the slots running longitudinally for a portion of the length of the support, spaced rails mounted in spaced relation above the support, means for adjusting the rails relative to the support, interchangeable gauge plates located on an end of the support, and upon opposite sides of the slots, means for maintaining the gauge plates in position, a pin located between the forward end of the rails and the forward end of the support, and resting upon the gauge plates, the gauge plates raising the pin a distance above the support equal to the thickness of the metal adapted to be provided with an eye, guides mounted on the support for directing the strip of metal longitudinally of the support, a carriage provided with spaced arms having hooks engage-able over the pin with the arms movable through the slotted portion of the support, a aw pivotally mounted in the carriage having a gripping edge, means on the carriage for moving the gripping edge into engagement with the strip of metal resting on the support, the spaced arms on the carriage forming tracks in which the jaw slides, and means for adjusting the jaw towards or away from the pin.

3. A device for bending the ends of metal strips to form eyes. comprising a support provided with spaced slots at one end, a pin mounted at said end of the support, means for removably retaining said pin on the support, a carriage swingablv mounted on the pin provided. with spaced hangers adapted to be hooked on the pin with the hangers movable through the slots, tracks formed in the spaced hangers, a cross head slidable in the tracks and provided with a longitudinally threaded passage, a jaw pivotally mounted on the cross head and movable with the cross head towards or away from the pin, a barrel depending from the hangers, a rod rotatably mounted within the barrel with one end having a threaded engagement with the internally threaded passage in the cross head, means for rotating the rod for moving the cross head and jaw towards or away from the pin, a sleeve slidably mounted llii on the barrel, a lever pivotally mounted onthe slidable sleeve, and means operatively connecting the lever with the movable jaw.

4.. A device for bending the ends of metal strips to form eyes, comprising a support provided with spaced slots at one end, a pin mounted at said end ol 'the support, means for ren'iovably retaining said pin on the support, a carriage provided with spaced hangers adapted for swingably mounting the carriage on the pin, with said hangers movable through the slots, at cross head slidably mounted between the spaced hangers and provided with a longitudinally threaded passage, a jaw pivotally mounted on the cross head and having a biting edge rock; abletowards or away from the pin, a barrel depending from the hangers, arod rotatably mounted within the barrel with one end having a threaded engagement with the internally threaded passage in the cross head, asleeve slidably mounted on the barrel, a lever pivotally mounted on the slidable sleeve, means operatively connecting the lever with the movable jaw whereby actuation of the lever rocks the jaw, and means connecting the cross head with the slidable sleeve whereby rotation of the rod in the barrel causes simultaneous movement of the cross head and said sleeve.

5. A device tor bending the ends of metal strips to form eyes comprising a support provided with spaced slots at one end, a pin resting on the ends or the support, longitudinally disposed bars located above the support, bolts connecting the bars'adjacent the slotted end or the support to said support, said bolts and end of the bars forming stops to limit the inward and upward movement of the pin, a c'n'i'iage provided with hangers swing-ably supported on the pin, the hangers being movable through the slots, and means adapted to clamp the free end of the strip of metal to the pin whereby when the carriage is revolved upon the pin the metal of the strips will be bent around the pin to form an eye.

6, in a device for bending the ends of metal strips to form eyes comprising a support provided with spaced slots at one end, a pin loosely mounted at said ends of the Support, a stop for preventing" inward and upward movement of the end of the pin, a

carriage provided with spaced hangers readily removable from and swingably suspended t'rom the pin, said hangers being movable through the slots, and means on the carriage adapted to rigidly engage a strip of metal and lock the free end of the strip to the pin whereby when the carriage is rotated the meta] will be bent to form an eye around the pin, said carriage and pin being readily disengaged from the support by an outward sliding movement of said pin longitudinally of the support.

7. In a device for bending the ends of metal strips to form eyes comprising a supportprovided with spaced slots at one end, apin loosely mounted at said end of the support, a stop for preventing inward and upward movement of the end of the pin, a carriage provided with spaced hangers readily removable from and swingably sus pended from thepin, said hangers being movable through the slots, and means on P the carriage adapted to rigidly engage a strip oi" metal and loclr the free end of the strip to the pin whereby when the carriage is rotated the metal will be bent to form an eye around the pin, a portion of the support between slots being cut away at its free end to permit the gripping element of the car riage to move upwardly between. the slots and engage the metal strip, said carriage and pin being readily disengaged from the support by an outward sliding movement oi. said pin longitudinally of the support.

8. A device for bending the ends of meta strips to form eyes, comprising a support provided with spaced slots at one end GX-V tending longitudinally tor a portion of the length of the support, a pin resting on the slotted end of the support, a stop to limit the inward n'iovement of the pin, a carriage provided with hangers receiving the pin where "1y the carriage swingably supported from the pin, means carried by the carriage adapted to clamp an end of the metal strip to said pin, said carriage, hangers and pins being readily removed from the free end of the support by an outward sliding movement of the pin longitudinally of the support. Y

GILBERT NAHUM HAMMOND.

Images