US2017315A - Tenter link - Google Patents

Description

'cfc. l5, 1935. F. A. LANE 2,017,315

TENTER LINK Filed July 28, 1932 INVENTOR. fia/ af/J.

ATTORNEYS.

Patented Oct. 15, 1935 UNITED STATES PATENT OFFICE TENTER LINK Application'July 28, 1932, Serial N0. 625,329

This invention relates to an improved construction of link for the chain of a tentering machine, and one of the objects of this invention is to provide a simple and eifective means for releasably retaining v the swinging jaw, which moves toward the fixed jaw to grip the work, in open position and out of engagement with the iiXed jaw during its travel back to position for again gripping the cloth passing through the machine.

Another object of this invention is the provision of interengaging portions carried wholly by the iixed jaw and the movable jaw and independent of the usual feeler member for holding the movable jaw out of engagement with the xed jaw while the link is not functioning to grip the work.

Y Another object of the invention is the provision of a construction having a detent pawl which will move by gravity to temporarily retain the swinging jaw in open position.

A further object of the invention is the provision of an abutment on the overhanging back portion of the xed jaw and a detent pawl carried by the swinging jaw to swing by gravity and engage this abutment and maintain the swinging jaw in open position, all independent of the feeler or control member which is operated by engagement with the cloth.

A still further object of the invention is the provision of an attachment which may be added to the link without materially changing the construction thereof which will function to maintain the movable jaw open during a desired portion of its travel.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:-

Fig. 1 is a perspective view of the tenter link looking at the back thereof.

Fig. 2 is a central sectional view through the link showing the gate or swinging jaw as held in open position.

Fig. 3 is a view simiiar to Fig. 2 showing the swinging jaw in closed or gripping position with apiece of fabric fragmentally shown therein.

Y Fig. 4 is a perspective view of the gate with the attachment for mounting the pawl secured in position thereon.

Fig. 5 is a perspective detail View of the attachment for mounting the pawl.

Fig. 6 is a perspective View showing a modied construction of link with the abutment and pawl positioned at one side oi the center of the link.

(Cl. 2li-62) Fig. 'l is a fragmental detail showing the notch in the overhanging portion of Fig. 6.

It is found in the practical operation of the standard tenter clip or link, that during the return travel of the chain when the swinging jaw 5 of the clip is not in engagement with the work, it will usually swing forwardly and rest upon the face of the xed jaw, and that the vibration of the parts during thisreturn travel causes a detrimental wearing action of the gripping surfaces 10` of these two jaws.' I have shown one simple and effective means for preventing this wearing action, which is arranged to act upon the swinging jaw upon being moved from operative to inoperative position to retain this jaw out of contact with 15 the fixed jaw during the time the clip is not working and to retain the jaw in that position until again called upon to function; and the following is a detailed description of the present embodiment of my invention and showing one 20 construction of tenter clip by which these advantageous results may be accomplished.

With reference to the drawing, I0 designates the body of the tenter link which is provided with the usual pivot ears II and I2 at its opposite ends 25 for connection to other similar links to form a chain'to travel the rails of the machine.

The body of the link consists of a Xed jaw I3 at its front edge and an overhanging back portion I4 providing spaced pivot bearings I5 through 30 which the hinge or pivot pin I'I extends. Hingedly mounted upon this pivot pin is the swinging jaw or movable gate I8 having end bearings I9 and central bearing 2l in the arm 2i). which bearings I9 and 2| are spaced to receive the pivot pin I1 35 to suitably mount the gate in position. This arm 20 extends upwardly beyond the body and serves as an opener to be engaged by a portion of the tenter machine to swing the gate to open position.

The gate or movable jaw is also provided with the bifurcated extension 22 having a roller 23 bridging its spaced arms at their outer ends to be engaged by the feeler member 24 pivoted as at 25 on a portion 26 xed on the base I0. This feeler 45 24 is slotted as at 2l to receive the roller 23 and control the dropping of the gate by its movement into the slot 29 in the base in the usual and accustomed manner when the work or cloth 28 is withdrawn from between the jaws.

It is often convenient to retain the gate in open position, particularly while the links of the chain are traveling back from one end of the machine to another in inoperative position, in order that the movable jaw will not rest upon the xed jaw and through chattering or vibration of the machine wear the fixed jaw and provide an undesirable groove therein; and to accomplish this I have provided an attachment having a body portion 3B, and side walls 3|, each of which are provided with openings 32 at one end and openings 33 at the other end, both sets being aligned for the reception of a pivot pin. This attachment is positioned upon the arm-.20 in such position that the pivot pin Il extends through the openings 3?. while the base 30 is riveted through opening 34.

to the gate by means of a pin 35', whereby the'- same is fixed to the swinging jaw. When clamped in this position the attachment extends at an angle to the opener arm 2`01and'provid'es'a pointY of pivotal attachment for a pawl or` latch member 35 which is pivoted by means of 4a pin 36 extending through the openings 33- inl the attachment, and when in this position the end portion 31 of this pawl, which carries a roller 38, will drop by gravity' into engagement with the overhanging back I4 of thedevice and will beheldY in one desired position of adjustment by the rollengaging the abutment 39l providedy by the: insertion of a pin-.4&3y into the overhanging back Hl` of, the link. When the latch is thus eng-aged with abutment 39 the gate or movable jaw` will be held out of engagement with thefixed jaw,.as illustrated in Fig. 2, and it will be retained inf-this position until it moves about the machinev and the cloth is again positioned along the lower jaw, after which the pawl will be engaged and suitably' moved downwardly by-a portion of the machineengaging a roll 4I mounted on the end 42 thereof to liftthe engaging end of this'pawlvv over the abutment 39and permit dropping ofl the gate intoengagement with the fabric.

In some instances where a back wall is not provided on the link an abutment surface 43 will bev formed by notching the edge as at 44 of one of the overhanging portions of the body and by providing a modied attachment 45 for mounting the pawl. In this casethe attachment is mounted adjacent the bearing' I9- and will be lockcdfthere: to and move with the gate and will-` be: in such position that the pawlV mounted thereon will. engage this abutment and' hold the gate in the desired open position as it swings about'the pintle pin to-such openv position.

By these arrangementsthe swinging jaw of the clip is closed upon the work and there retained and is held out of engagement with the lower jaw during its return movement and thus materially increases the life of thelink throughreductionv of wear. t

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which -the device is susceptible, the invention being defined and limited only by the terms of the. appended claims.

I claimz- Y 1. A device for pivotally mounting a pawl on the gate of a tenter clip comprisingl a body having side walls with openings therein. adjacent one end to receive the pivot pin of said gateand openings adjacent the other end to pivotally mount a pawl. Y

2. A tenter clip having a stationary jaw and a cooperating swinging jaw, asupport movable in response to movement of the swinging jaw, a -xed catch provided on the stationaryjaw and a latch pivotally mounted intermediate its end on said movable support to be positioned to engage said other end to receive the pivot pin of the swinging gate.

4.y A tenter clip having a stationary jaw' and a cooperating swinging jaw, a support movable in response tomovement of the swinging jaw, a fixed catch provided on the stationary jaw and a latch pivotally mounted intermediate its end on said movable: support to be positioned to engage said catch when the swinging jaw is opened to hold said jaw in open position, said body having a surface formedr to engage-a portion of the surface of the swinging'jaw and be secured thereto.

5. A tenterI clip having a fixed jaw, a cooperating swinging jaw, a movable supportv onsaid swinging jaw, a catchy secured on said fixed jaw andi a latch pivotally mounted on said movable support4 to engage said catch when the jaw is open to hold the jaw in such open position, the engaging surfaces of said latch and catch being such that pressure on the swinging jaw will prevent their release, said latchk extending on the opposite side of the pivot from saidv catch to be engaged for releasing said latch.

6.A1tenter clip having a xed jaw, a cooperating swinging jaw, a fixed catch provided on the xed jaw, a latch, and means pivoting said latch onthe-swinging jaw in such position as to cause one portion to move into engagement with said catch when the jaw is open to hold the jaw in such open position, said latch extending on the 0pposite side of the pivot from said catch to be engaged for releasing said latchbyy a movement towards the fixed jaw.

7. A tenter clip having a fixed jaw, a cooperating swinging jaw, a iixed abutment provided on said xed jaw, and a pawl pivoted on said swinging jaw in position to engage'said abutment and hold the swinging jaw in open position, the engaging surfaces of said latch and catch being such that the pressure on the swinging jaw will prevent their release, said pawl extending on the opposite side'of the pivot to be engaged to release the pawl.

8. A tenter link comprising a xed jaw, an overhanging support, a cooperating swinging `iaw pivote'd on said support, a stationary projecting pin on said support and a pawl pivotally mounted on said swinging jaw to be positioned thereby to engage said pin and maintain the swinging jaw in open position, the engaging surfaces of said latch and catch being such that pressure on the swinging jaw will prevent their release, said pawl extending on the opposite side of the pivot in a position to be engaged to release the pawl.

9. A tenter link comprising a fixed jaw, an overhanging support, a cooperating swinging jaw pivoted on said support, a stationary abutment on said support and a pawl mounted on said swinging jaw to move therewith and be positioned thereby to engage said stationary abutment and maintain the swinging jaw in open position, said pawl having an arm extending on the opposite side of the pivot, to be engaged by a portion of the tentering machine for releasing the pawl from engaging position.

10. A tenter link comprising a fixed jaw, anv Il overhanging support, a cooperating swinging jaw pivoted on said support, a stationary abutment on said support and a pawl mounted on said swinging jaw to move therewith and be positioned thereby to engage said abutment and maintain the swinging jaw in open position, said pawl having an arm extending therefrom, an anti-friction member provided on said arm to be engaged by a portion of the tentering machine for releasing the pawl from engaging position.

11. A tenter link comprising a xed jaw, an overhanging support, a cooperating swinging jaw pivoted on said support, a stationary abutment on said support and a pawl mounted on said swinging jaw to be moved thereby and be positioned to engage said abutment and maintain the swinging jaw in open position, and an anti-friction member positioned on said pawl to engage said abutment, the engaging surfaces of said latch and catch being such that pressure on the swinging jaw will prevent their release.

12. A tenter clip having a fixed jaw, a cooperating swinging jaw, a ixed abutment provided on said fixed jaw, an arm xedly attached on said swinging jaw, and a pawl pivoted on said arm to move therewith to engage said abutment and hold the swinging jawI in open position, said pawl extending on the opposite side of the pivot to be engaged to release the pawl by a movement towards the fixed jaw.

13. A device for pivotally mounting a pawl on the gate of a tenter clip comprising a body having a side wall to receive the pivot pin of the gate and a base plate at an angle thereto to extend along l5 and engage the rear surface of the gate to mount the device in position on the gate.

FRANK A. LANE.

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