US1843004A - Attachment for chain making machines - Google Patents

Description

Jan. 26, 1932. STAHL 1,843,094

ATTACHMENT FOR CHAIN MAKING MACHINES Filed March 18, 1951 3 Sheets-Sheet l Srmentor FRANK E.S TAHL attorueg Jan. 26, 1932. F. E. STAHL ATTACHMENT FOR CHAIN MAKING MACHINES Filed- March 18, 1931 3 Sheets-Sheet 2 Zmnentor FRANK E.STAHL A/w CIttorneg 5 Jan. 26,,1932.

F. E. STAHL ATTACHMENT FOR CHAIN MAKING MACHINES Filed March 18, 1931 3 Sheets-Sheet 3 HHI:

Zhwentor llllllillli 0% ec6 l C FRANK E.STAHL f W,

A; GttornegS Patented Jan. 26, 1932 UNITED STATES A ENT O FE FRANK eqsmm; or roNAwANnA, NEW YORK, ASSIGNOR, 'ro ooLUMBns MekI NON cHAIN CORPORATION, or ToN wANn NEw' YoBK, A CORPORATION on NEW l YORK 1 ATTACHMENT non. CHAIN MAKING MAcHINns Application filed March 18, 1931. Serial No. 523,522.

' the short link forming wire pieces-ic'alled link blanks are alternately turned on their axes so as to change theirrelative positions circumferentially prior to their presentation to the link forming devices as hereinafter explained. For example in manufacturing a cross chain for an anti-skid devicefor a motor ,vehicle tire in which the cross chain is made up of links formed from wire having a sharp longitudinal edge along one side such as shown and described in the United tates Patent dated December 23, 1930, No. 1,786,318, 'it is desirable, if the sharp edges of the links are to face, in use, at the exposed side when. on the tire was to takeia firm p 7 I stock is sheared off at the point ,25 to there grip on the-road or ice, that each of alternate pairs of link blanks be given approximately a quarter turn priorto its insertion through the next previously formed linkL;

The present invention, therefore, consists principally in. the herein described and claimed means embodied in a chain making machine forgiving such a turn to the pieces from which the links are formed.

Except as modified by my inventionthe wire feeding, cutting and link forming devices and mechanism for operating are substantiallythes'ame as in the corresponding type of link forming machine and therefore need not be described in great detail. 1 In the accompanying drawings illustrating one embodiment oftheinvention v V Figure 1 is atop plan viewof a link forming machine according'to the present invention." 1 Fig.2 is a detail on a larger scale of the mechanism for actuating the wire rocking means,*said mechanism appearing at the left hand end of Fig. 1. l

Fig. 3' is an elevation partly in section on the line III-III Fig. 2 looking to the left. Fig. dis a" detail in plan-view on a larger scale than in Fig. 1 of the wire shearing and rocking devices.

Fig. 5 is a detail in elevation and section on theline V'V Fig. l of the wire rocking devices. i

Referring to the drawings the wire 10 is drawn from a reel (not shown) through straightening rollers 11 by means ofan ordinary clamping device 12 on the end of lever arm 13, the latter being oscillated on the fulcrum point15 by means of a cam 14:. .On the cam 14 is a cam 17 that operates a lever 16 fulcrumed at 19 and grips wire 10 thereby preventing said wire 10 from being carried back by the return stroke of lever 13. "The wire 10 is fed into shear holder 22 the required distance throughhardened holder 21 that is rigidly held in a fixed block 20, said shear holder 22 being rigidly held in a block 23 that is-fastened to a slide 24 that ope-rates the bending fingers-24 for forming chain links around a mandrel 24 When slide 24 moves forwardthe wire quired length between'the holders 21 and 22. Said sheared-off portion shown at 10 in the holder 22, is then oscillated on its axis by meansof an oscillating holder 26. Ordinarily the locating head 27 has the internal passage shaped to fit the form of-wire with a bevel at the entering end 28.

Attached to the oscillating holder '26 is a lever 29, one end of which contains a roller 30 that is held ina slottedfork 31 on .the end of a piston 32 sliding in-housing 33,-the =latter being fastened to the top guide 3% by'means of screws 35. At the endof piston 32 and hous ing 33 are located screws 11 and 12 adjustable to limit-the travel of piston 32- in one direction. 15 designates a'plunger stop, the end of which is moved into and out of the housing 33 by means of a lever 16' fastened to shaft 31 crossing below and held in suitable hearings in the bed 17 of the former and timer bracket 19. The timer bracket 19' is mounted on the side of a bed 17 between cam wheels20? and 21 that operate the turning fingers andimandr'el respectively. On one end of shaft 31 is mounted timer lever 22 which carries two pivoted arms 23 each of which has a roller 24 attached to its free end. On the other end of lever 22 is a bolt 25 that slides in a slot in the end of a lever 26 fulcrumed onthe bracket 19 by means of-bolt 27. Between the end of lever 22 and 26 is stretched a tension spring 28 which governs the position of lever 22 Bolted fixedly to the sides of the rotating cam wheels 20 and 21 are dogs 30 During one rotation of the cam wheels 20 and 21 two links are formed, but during this rotation the timer lever 22 is fixed in the position towards cam wheel 20 as shown. In this operation the plunger 15 is carried below piston housing 33 thereby allowing the piston 32 to travel up against stop screws 12 under the action of spring 13. The piston. 32 carries lever 29 forward into the position shown in Fig. 5 and said lever 29 turns holder 26 with locating head 27 that has carried the stock into correct position for feeding the link blank into position ready to be formed on the mandrel.

At the end of the revolution of cam wheel 20 the dog 30 rises under roller 24 and carries it upward through the lost motion range until roller arm 23 makes contact with the lever 22 the lever 22 being carried by spring 28 over toward cam wheel 21 going a little beyond the vertical towards cam wheel 21 against stop screws 29*.

This operation also permits the plunger 15 to rise into the piston housing 33 to hold the piston against movement by the spring. While the lever 22 has been changing its position the cut off slide 23 has been in the forward position with piston 32 in the forward position in housing33. When the slide 23returns the piston 32 contacts with the stop plunger 15 by means of stop screws 11". As the slide 23.continues to move the lever 29 is thrown over into the opposite position and carries the link blank into the next forming positionwhere it remains for one revolution 1 of cam wheel 21 after which the holder 27 is returned to the original position and the operation repeated.

From the foregoing it will observed that the full line position, Fig. 5, represents the block 23 in wire feeding position. lVhen said block is moved-from the full line position to broken line position the wire is cut to form the link blank, the pin 23 on the block supporting the arm 29 and-holding it in the same relation to said block 23. When the pin 15 is moved up to stop the piston 32 and the block 23 is returned with the cut blankinthe rocking holder 26 to wire feeding position the arm 29 of the rocking holder is swung to the right on its pivot in the fork at 31 thereby imparting a turn to the rocking blank holder and to the wire blanktherein. From this position it is fed to the link formers as before stated.

In the construction showndt willbe noted that after two link blanks are turned and upon the next two cutting movements of the block 23 the pin 15 is not elevated to arrest the piston 32, hence the block and link blank therein are each returned to blank feeding position without rocking the holder 26 and the cut blank therein. Hence pairs of the link blanks are fed to the link formers with their sharp edges out of line or in endwise angular relation to each other. In practice the ends of the links can be subsequently welded in a welding machine and after the links are welded they are subjected to the twisting operation so that the sharp edges of the faces of the links are all on one side of the chain and in substantially the position and relation to one another as shown in said. Letters PatentNo. 1,786,318 hereinbefore referred to.

The forms of the parts can be changed without departing from the gist of the invention as claimed.

What I claim is:

1. The combination in a chain making machine. having a wire stock feeding means, means for shearing the stock into link blanks, link forming means and means for turning alternate blanks on their axes prior to their presentation to the link forming means. I

2. The combination in a chain making machine having a wire stock feeding means, means for shearing the stock into link blanks, link forming means and means for turning the alternate blanks on their axes prior to their presentation to the link forming means, said last named means consisting of a holder from which the link blanks are protruded to the link forming means, and cam actuated means for rocking said holder.

3. The combination in a chain making machine having. a wire stock feeding means, means for shearing the stockinto link blanks, link forming means and means for turning the alternate link blanks on their axes prior to their presentation to the link forming means, said last named means consisting of a holder from which the link blanks are protruded to the link forming means, and cam actuated means for rocking said holder, said camactuated means operable with alternate operations of the link forming means.

4. The combination in a chain making machine having wire stock feeding means, link forming means, aholder for receiving a link blank prior to its presentation to the link forming means, and means for rocking said holder on its axis to rock the link blank therein.

5.. The combination in achain making machine having wire stock feeding means, link forming means, a holder for receiving inv succession link blanks each prior to its presentation tothe link forming means, and means for rocking said holder'on its axis to rgck alternate link blanks supplied to said holder;

6. The combination in a chain making machine having a wire stock feeding means, means for shearing the fed stock into link blanks including a sliding block, a link blank holder in said sliding block, means for rocking said holder, and means for causing the intermittent actuation of said rocking means to change the position of alternate link blanks circumferentially.

7 The combination in a chain making machine having a Wire stock feeding means,'

means for shearing the fed stock into link blanks including a sliding block, a link blank holder in said block, rocking means for said holder to change the position circumferen tially of alternate linkblanks supplied to said holder and means for timing the operation of said rocking means. a

8. The combination in a chain making machine having a Wire stock feeding means, means for shearing the fed stock into link blanks including a sliding block, a link blank holder in said block, rocking means for said holder to change the position of alternate link blanks supplied to said holder and means for timing the operation of said rocking means to change the position circumferentially in said holder of alternate link blanks supplied to said holder.

9. The combination in a chain making machine having a wire stock feeding means, means for shearing the fed stock into link blanks including a sliding block, a link blank holder in said block, rocking means for said holder to change the position of alternate link blanks supplied to said holder in form ing the chain and means for timing the operation of said rocking means to change the position circumferentially in said holder of alternate link blanks supplied to said holder.

10. The combination in a chain making machine having a Wire stock feeding means, means for shearing the fed stock into blanks including a sliding block, a link blank holder in said block, rocking means for said holder to change the position circumferentially of certain of said link blanks supplied to said holder in forming the chain and means for timing the operation of said rocking means.

FRANK E. STAITL.

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