US1085664A

US1085664A - Wire-drawing block.

Info

Publication number: US1085664A
Application number: US47752909A
Authority: US
Inventors: Elbert H Carroll
Original assignee: Morgan Construction Co
Current assignee: Siemens Industry Inc
Priority date: 1909-02-13
Filing date: 1909-02-13
Publication date: 1914-02-03
Anticipated expiration: 1931-02-03

Description

E. H. CARROLL. WIRE DRAWING- BLOCK. APPLIUATION FILED r123. 13, 1909.

Patented Feb. 3,1914.

'IHHHHH U im m J m; fi gg r ELIBERT H. CARROLL, F WORCESTER, MASSACHUSETTS,

ASSIGNOR T0 MORGAN CONSTRUCTION GOMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSAGHUSETTS.

WIRE-DRAWING BLOCK.

A To all whom it may concern wire drawing block embodying my present the attendant.

invention. Fig. 2 is a plan view of the same shown in section on line 2-2, Fig. 1. Fig. 3 is a detached side view of the upper jaw of the gripping mechanism.

1 Similar reference letters and figures refer to similar parts in the different views;

The object of my present invention is to provide a wire drawing block with an improved gripping mechanism for holding the end of the wire at the beginningof the drawing operation, and to provide means for holding the wire gripping mechanism in a recess in the side of the wire drawing block during the rotation of the block in case the gripping mechanism is relieved from the strain on the wire, and I accomplish these objects by means of the construction and arrangement of parts as hereinafter de scribed and pointed out in the annexed claims.

In the type of drawing blocks to which my invention relates, the gripping mechanism when suddenly relieved from strain by the breaking of the wire, for example, is liable to be thrown violently outward by centrifugal force, striking against anything in its path and jeopardizing the safety of By my" present invention I provide a counteracting force to 're'tain t-he ripping mechanism in the recess of the lilock by the rotation of the block itself, and at the same time allowing the gripping mechanism to be freely withdrawn when the block is at rest to enable the end of the wire to be engaged. I

Referring to the accompanying drawings 1 denotes a wire drawing block of any known or usual form of construction, suitably mounted upon a table and connected with a driving mechanism in the manner of wire drawing blocks now in use. In one side of the wire drawing block I provide a recess 2 open at the top and sufiiciently large to receive the wire gripping mechanism 3, and

Specification of Letters Yatent.

Patented Feb. 3,1914.

Application filed February 13, 1909. Serial No. 477,529.

a draw bar 4 pivotally connected at 5 to the gripping mechanism and at 6 to a sleeve 7 held upon a fixed stud 8 carried by the wire drawing block. I I

The gripping mechanism comprises parallel bars forming jaws 9 and 10 of the gripp1n mechanism, pivotally connected on opp os1te sides by the

parallel links

11, 11, and 12, 1-2. Extending upwardly from the jaw 9 is an arm 13 and extending upwardly from the jaw'lO is a corresponding arm 14, said arms being preferably slightly curved and between the arms is interposed a blade spring 15 with its tension applied to separate the

arms

13 and 14 and bring the'opposing faces of the jaws 9 and 10 into contact. The gripping face of the jaw- 9 is preferably plane, while that ofthe jaw 10 is provided with teeth 16, said teeth, however, being preferably formed on a removable piece 17, having a projection 18 interlocking the jaw 10 to prevent the longitudinal movement of the toothed piece 17 The toothed piece 17 is held in position by means of a screw 19. In order to insert the end of the wire between the jaws 9 and 10 the

arms

13 and 14 are compressed by hand, causing the jaw 10 to be rocked on the

links

11 and 12 and separated from the jaw 9 sufliciently to allow the insertion of the e'nd of the wire 20. As the block 1 is started in motion to draw the wire 20 through the die box,'in the usual manner, the end of the wire will be firmly grasped by the gripping jaws 9 and 10, and

as the wire 20 is wound around the periphery of the wire drawing block, as shown in F igs. 1 and 2, the draft of the wire will draw the gripping mechanism into the recess 2 and within the periphery of the block, so that the coils of wire as they are successively wound thereon will be pushed upwardly ,over the recess 2. The

pivotal connections

5, 6 and 8 enable the gripping mechanismto be moved upwardly or downwardly or radially outward, as shown by broken lines at 21, Fig. 2.

' During the rotation of the wire drawing block the draft of the wire holds the grip in the recess 2, but in case the wire should break or become released from the grip, the centrifugal force of the rotating block would tend to throw the gripping mechanism outward. In order to prevent this and keep the gripping mechanism in the access; the following construction has been lprovided: At-

- recess 2, into the tached to the sleeve 7 is a radial-arm 22, which is pivotally connected by a link 23 with a radial arm 24, projecting from a sleeve 25 which is pivoted upon a fixed stud 26, carried by the base of the wire drawing block. Projecting from the sleeve 25 is an arm 27 forming with the arm 24 a bell crank lever and which is provided with a counterweight 28 arranged to counter-balance the grlpping mechanism. In case the gripping.

mechanism is radially withdrawn from the position shown by the broken lines 21, Fig. 2, the counterweight 28 will be carried intothe position denoted by the broken lines 28, Fig. 2, by the rocking of the sleeve 7, but when the wire drawing block is in rapid motion the counter.- weight 28 will be maintained in the position shown byfull lines in Fig. 2, being thrown outwardly by centrifugal force,

thereby rocking the sleeve 7 and throwing the draw bar 4.- into the re Lss until its in ward motion is stopped by ts contact at 29,

' an angle with the draw bar, as shown, in"

machines of this class.

the coils of'wire are, wound and pushed gradually upward they are received upon the upright posts 31 in the usual manner in In order to disconnect the coil of wire from the grip to allow .the removal of the coil from the block-the

arms

13 and 14 are compressed by the operator who reaches his arm over the coiled wire and gains access to the gripping mechanism through the open top of the recess The pivotal pin Got the draw bar 4 is inclosed in slots 32 formed in ears 33 projecting from the side of the sleeve 7, in order to permit a slight longitudinal movement of the draw bar for convenience the jaws to receive the end of the wire without movement of the block.

I claim 1. The combination of a rotating wiredrawing block, provided with a recess in its side, a gripping mechanism pivotally con.-

nected with said block and arranged to be swung into and out of said recess, and means operated by centrifugal force for automatically holding said gripping mechanism in said recess when the block is in rotation.

2. The combination of a wire drawing block, a gripping mechanism pivotally connected to said block, a pivot on-said block parallel with its axis of rotation for said force when the block in adjusting nism held approximately in surface of said block'when to said block, and

gripping mechanism, and means arranged to hold said gripping mechanism from outward movement on said pivot when said block is in rotation. I

The combination of a wire drawing block, provided with a'recessto receive a gripping mechanism, a gripping mechanism 7 pivotally connected to said block and held in said recess by a pivot on said block in one end of said recess parallel with the axis of rotation of the block, and means arranged to hold .said gripping mechanism. from swingingon said pivot out of said recess. 1

when said blockis-in rotation. t 'kThg h 1 100 a grippin mec anism' ivota 1 connected to-said b%0ck,.a stud dh said block, an arm provided with a counterbalance pivoted on said stud, and a series of levers connecting said gripping mechanism and said arm, arranged to swingsaid gripping mechanism inward by outward movement of said counterbalance.

5. The combination of a Wire drawing block, a gripping mechanism pivoted to said block and arranged to" swing outwardly by centrifugal force when .said block is in rotation, a weight movable by centrifugal is rotated, said weight being operatively connected with said gripping mechanism to counterbalance the cen-. trifugal force applied to the latter.

combination of a wire drawing 6. The. 'comblnation of a wire drawing block, a gripping mechanism pivotally united to said block, a radial arm attached to said gripping mechanism, a stud attached to said block, a bell crank lever on said stud,

a link connecting said radialarm with one arm of said bell crank lever, and a counterbalance onthe other arm of said lever.

"7. The combination of a wire drawing block, a gripping mechanism pivotally connected with said block, said grippingmechanism held approximately in line with the surface of the block by'the draft ofthe wire when theblock is. in

rotation, and means for holding said gripping mechanism from ou t" ward movement when the draft of the wire is relieved during the rotation of'the block.

8. The combination of; a wire drawing block, a gripping mechanism pivotally con nected with said block, said gripping mechasaid block is in rotation,.- and means. for, holding said gripping mechanism from outward movement when the wire is released from said pp mechanism during the rotation of said block;

#9. The combination block having a recess in'its side, of a fixed stud carried-by the block in said recess, a sleeve mounted on said stud, a gripping mechanism connected with .said sleeve and capable of a swinging movement radially contact with the with a wire drawing aiitognatic yielding means;

l I l 1 for holding saidgripping mechanism from swinging radially outward on said stud operative by the rotation of the block.

10. The combination of a wire drawing block, a gripping mechanism pivotally connected to said block, an arm radial with said pivot attached to said gripping mechanism, and means connected with said radial arm for swinging said gripping mechanism on its pivotal connection with said block, to carry said gripping mechanism toward the center of the block, when said block is in rotation.

11. The combination of a wire drawing block provided with a recess, a draw bar pivotally connected with said block, a gripping mechanism pivotally connected with.

said draw bar, and yielding means controlled by said draw bar said draw