US1247023A

US1247023A - Wire-twisting chuck.

Info

Publication number: US1247023A
Application number: US13024816A
Authority: US
Inventors: Gary B Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-11-08
Filing date: 1916-11-08
Publication date: 1917-11-20
Anticipated expiration: 1934-11-20

Description

G. B. SMITH. WIRE TWISTING CHUCK. APPLICATION FILED nov. a. 1916.

v Patented Nov. 20, 1917.

GARY B. SMITH, or CHICAGO, ILLINOIS.

WIRE-TWISTING CHUCK.

To all whom it may concern:

Be it known that I, GARY B. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful W'ire-Twisting Chuck, of which the following is a specification.

The present invention is a wire twisting chuck, adapted to be used in a wire twisting machine of the character disclosed in my Patent No. 1,165,550, granted December 28, 1915.

The object of the invention is the provision of a novel and improved chuck for use in a wire twisting machine and embodying a chuck member mounted for rotation and having a passage extending therethrough for the passage of the twisted wire, means being provided for cooperation with the chuck member to cause the same to grip and release the wire as necessary, the present chuck being exceedingly simple, compact, and inexpensive in construction, and at the same time being thoroughly practical and eflicient in use.

\Vith the foregoing and other objects in View which will'appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein Figure l is a longitudinal section of the chuck illustrating the same in released position.

Fig. 2 is a cross section taken on the line Fig. 3 is a view similar to Fig. 1 of a modified form showing it in wiregripping position.

In carrying out the invention, there is provided a tubular shaft 1 which is journaled for rotation in any suitable manner for rotating the chuck.

The chuck member 5, which is tubular or hollow, has one end threaded securely upon one end of the shaft 1. The member 5 is rovided with a longitudinal restricted bore fextending from the tapered or reduced free end 6 of the member 5 to the enlarged chamber or bore 8 of said member. The enlarged Application filed November 8, 1916.

Specification of Letters Patent. Patent d Nov. 20, 1917.

Serial No. 130,248.

bore 8 and bore of the shaft 1 allow the tw sted wire to pass readily therethrough and with little friction, and the reduced bore 7 is arranged for the snug reception of the twisted wire whereby the wire can be gripped properly. The wire is fed longitudinally through. the bore 7 and is adapted to be twisted when the member 5 is gripped thereto, as will hereinafter more fully appear. The member 5 is provided with a number, in this case three, of longitudinal radial slots 9 extending from the bore 7 to the periphery of the member 5, and providing.

spring jaws 10 which are normally separated or which spring apart when released. The bore 7 is provided between the jaws 10, whereby when. said jaws are forced :together they will grip the wire. The slots 9 extend beyond the inner end of the bore 7 so that the jaws 10 can spring. The member'5 has an annular peripheral rounded'rib 11 at that end which is fastened to the shaft 1, the purpose of which will hereinafter appear.

As a means for closing the jaws 10 upon the wire, a sleeve 2 is slidable upon the memher 5 and has a threaded end 3 remote from the rib 11 screwed within the counter bore 12 ofa head 12. That end ofthe head 12 remote from the rib 11 is tapered or contracted, as at 13, to fit the tapered end 6 of the member 5 when the head 12 and sleeve 2 are slid toward the shaft 1, and the tapered or reduced end 13 has. an aperture 14 aliningwith and slightly larger in diameter than the bore 7. The .wire passes loosely through the aperture 1 1.

The sleeve 2 is provided with longitudinal slots 4 extending to that end of the sleeve adjacent to the rib 11 and providing spring tongues 4L having the curved keepers 15 at their free rear ends to snap over the rib 11 when thehead 12 and sleeve 2 are slid rearwardly, the tongues 1 being resilient so as to spring apart and snap inwardly toward one another. When the keepers 15 fit over the rib 11, they hold the sleeve 2 and head 12 in rearward position, and when the sleeve 2 and head12 are forcibly moved forward away from the shaft 1, the keepers 15 will leave the rib 11 and snap in front of the same to holdthe sleeve and head in place, as seen in Fig. 1. I

In order to enable the head 12 to be slid longitudinally; and. to rotate with the memher 5, the head 12 is provided at its rear end with an annular peripheral rib 16 in front of which is a longitudinally movable nonrotatable collor 17 disposed between said rib and a nut 18 threaded upon the head 12 and held in place by a jam-nut 19. Two annular sets of anti-frictional balls 20 are disposed between the ball races of the collar and the rib 16 and nut 19, to let the head rotate with little friction. A fork 21 has its ends p'ivoially engaging outstanding trunnions 22 carried by diametrically opposite portions of the collar 17. The fork 21 is adapted to be connected to suitable means {not shown) for sliding the collar 17 longitudinally, any suitable means being employed for this purpose. The head 12 is thus journaled for free rotation within the collar 17, and the collar can be moved longitudinally for sliding the head and sleeve correspondingly, without impending the rotation of the head and sleeve with the member 5 when necessary.

A jam-nut 23 is screwed upon the end 3 of the sleeve 2 and bears against the rear end of the head 12 for holding said parts in adjusted position. The nut 23 and head 12 have the respective sockets 2 1 and 25 or other suitable means for the engagement of a wrench or other implement to adjust the parts.

In operation, the wire embodying a number of strands is passed through the aperture 14 of the head 12 and through the member 5 and shaft 1, and the member 5 is rotated continually during the operation of the machine. When the head 12 is moved forwardly to bring the tapered end 13 thereof away from the tapered end 6 of the member 5, the jaws 10 are allowed to separate, thereby releasing the wire, so that the twisted portion of the wire can be slid through the tubular member 5 to bring the untwisted portion near the jaws 10. During the time that the head 12 is moved forwardly it is in a passive condition, that is,

.. it can either remain stationary or rotate.

The keepers 15 are snapped in front of the rib 11 in the meantime to hold the head in place. Now, when the untwisted portion of the wire is brought adjacent the jaws 10, the head 12 is slid backwardly by moving the collar 17 correspondingly, and the tapered end 13 of the sleeve will engage the tapered end 6 of the member 5, thereby forcing the jaws 10 toward one another, causing them to grip the wire tightly therebetween, and consequently that portion of the wire gripped by the jaws 10 will be rotated with the member 5 carried by the shaft 1. This results in the twisting of the wire. When the sleeve 2 is moved rearwardly. the keepers 15 are forced back over the rib 11 and snap over said rib for holding the head in position so that it cannot move forwardly accidentally as would be liable to release the jaws 10. The head 12 can rotate freely within the collar 17 at any position of the cellar, and the collar can be readily adjusted longitudinally by any suitable means, it being noted that the collar is non-rotatable. When the wire is twisted up tight, the jaws are again released to allow the twisted portion of the wire to be again fed through the tubular member 5 for a new operation, reference being had to the aforesaid patent which will clearly suggest the utility of the chuck herein disclosed.

The head 12 can be adjusted or screwed relative to the sleeve 2 to properly space the tapered end 13 of the head and keepers 15 of the sleeve.

The modified form illustrated in Fig. 3 is of the same general construction as the form above described, with the exception that the rib 11 of the member 5 is eliminated and the tongues 1 of the sleeve 2 are provided at their free ends with inturned lips or portions 15 that overlap the rear end of the member 5 when the tapered portions are in engagement to hold the jaws in wire gripping position, as seen in Fig. 3. "Vhen the head 12 and sleeve 2 are forced forwardly, the lips 15 ride onto and are separated by the member 5, the tongues 1 being sprung apart so that the frictional engagement of the tongues with the member 5 will hold the parts in position with the tapered portions separated, as when the keepers 15 above described are in front of the rib 11. However, with the modified form, when the head 12 and sleeve 2 are slid rearwardly, the lips 15' snap easily behind the member 5, with little force being necessary to slide the parts, whereas with the form above de scribed, it is necessary for the keepers 15 to be separated to move over the rib 11.

hen the tongues l snap into position to hold the head and chuck in relative position, this relieves the strain between the collar 17 and head 12, and the jaws will be maintained in gripping position by the tongues a and corresponding parts alone.

The head 12 and sleeve 2 can be made to rotate with the chuck member 5, as by applying one or more pins or lugs 26 to the member 5 and projecting such pins into one or more slots 4.

This chuck can be used for various other purposes, and is not restricted to the particular use described.

Importance is attached to the adjustment between the sleeve 2 and head 12, due to the ad antages flowing therefrom. Thus, by adjusting the sleeve and head relatively, the relative position of the chuck member and head when held in a gripping position can be re ulated. For example, by adjusting the sleeve and head to separate the tapered portion 13 and keepers 15, the chuck member when held by the keepers'15 will not be advanced so far toward the member 1 2 as when the keepers 15 are nearer said member, and consequently, the jaws will not be forced inwardly so far, to provide for a looser grip or the-gripping of the twisted wire-cable or other member of larger diameter. By adjusting the sleeve and head toward one another, the chuck member being held by the sleeve will force the chuck member farther into the head 12 whereby to force the jaws closer toward one another to more tightly grip the wire or the like, or to grip a wire or other member of smaller diameter. In this manner, it is possible to adjust the chuck for wire or articles of various diameters, within certain-limits, and to control the gripping tension.

Having thus described the invention, what is claimed as new is:

1. A chuck embodying a rotatable member having normally separated spring jaws, a head upon said member, said head and member having cooperable tapered portions for forcing the jaws toward one another to gripping position, means operable for slidin the head and member relatively for bringing the tapered portions into and out of engagement, and interengageable means carried by said head and member for holding them in position against accidental displacement longitudinally.

2. A chuck embodying a rotatable tubular member having normally separated spring j aws, a head slidable upon the tubular member, said head and tubular member having cooperable tapered portions for forcing the jaws toward one another to gripping position, the head having an annular peripheral rib, a member engaged upon the head, and a longitudinally movable collar surrounding the head and disposed between said rib and second mentioned member.

3. A chuck embodying a rotatable tubular member having normally separated spring jaws, a head slidable upon the tubular member, said head and tubular member having tapered portions cooperable for forcing the jaws toward one another to gripping position, the head having an annular peripheral rib, a nut screwed upon the head, a non-rotatable collar surounding the head and disposed between said rib and nut, antifrictional means between said collar and the rib and nut, and a fork straddling the collar and having its ends trunnioned thereto.

4:. A chuck embodying a rotatable member having normally separated spring jaws, a head movable upon said member, said head and member having cooperable tapered portions for forcing the jaws to gripping position, and resilient means carried by one of said parts and engageable with the other for holding the head and member in position against accidental displacement.

holding said head and member in position relative to one another.

6. A chuck embodying a rotatable member having normally separated spring jaws, a head movable upon said member, said head and member having codperable tapered portions for forcing the jaws :to gripping position, and a sleeve. connected to-the headand movable upon said member, said sleeve having resilient means engageable with said -m-ember for holding the head and member in position relative to one another.

7 A chuck embodying a rotatable member having normally separated spring jaws, a head movable upon said member, said head and member having cooperable tapered portions for forcing the jaws to gripping position and a sleeve connected to the head and movable upon said member, said sleeve having slots extending to that end remote from the head and providing spring tongues, said tongues having means engageable with said member for holding the head and member in position relative to one another.

8. A chuck embodying a rotatable member having normally separated spring jaws, a head movable upon said member, said head and member having cooperable tapered por-.

tions for forcing the jaws to gripping position, and a member adjustably' connected with the head, the two members having interengageable means for holding the head and first mentioned member in position relative to one another.

9. A chuck embodying a rotatable member having normally separated spring jaws, a head movable upon said member, said head and member having cooperable tapered portions for forcing the jaws to gripping position, and a sleeve 'adjustably connected with the head and movable upon said member, said sleeve having resilient means engageable with said member for holding the head and member in position relative to one another.

10. A chuck embodying a rotatable mem- 1 her having normally separated spring jaws,

a head movable upon said member, said head. and member having cooperable tapered portions for forcing the jaws to gripping position, and a sleeve threadedly connected with the head and movable upon said member, said sleeve having slots extending to that end remote fro-m the head and providing spring tongues, said tongues having means at their free ends engageable with said member for holding the head and member in position relative to one another.

11. A chuck embodying a chuck member having jaws movable toward one another to gripping position, a member movable relatively t0 the chuck men'iber, means whereby the relative longitudinal movement of said members moves the jaws into gripping position, and adjustable means carried by one of said members and engageable with the other for holding said members at different relative positions when the jaws are in grip ping position. 12. A chuck embodying two members movable longitudinally relative to each other, one having spring jaws movable toward each other into gripping position, said members having cooperating means for moving the jaws to gripping position as said members are moved longitudinally relative to one another in one direction, and adjustable means carried by one of said members and engageable with the other member for holding them in dilferent relative positions when moved longitudinally in said direction.

in testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

GARY B. SMITH. Witnesses:

MoNRoE E. MILLER, P. AGNES RocKELLI.

Eagles oi this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, ID, CB