US1799446A - Tenter clip - Google Patents

Description

, April 1931- w. A. STELLING 1,799,446

TENTER CLIP Filed April 5, 1950 ATTORNEYS.

Patented Apr. 7, 1931 UNITED STATES WILLIAM A. STELLING, or rnovmnncn'n FINISHING MAQHINERY COMPANY, OF TION' OF RHODE ISLAND PATENT OFFICE TENTEB CLIP Application filed April 3, 1930. Serial No. 441,360.

of, while the clip is not functioning by gripe ping the work.

A still further object of the invention is to so mount the detent pawl that it will act by gravity to temporarily retain the swinging, jaw in open position.

The invention further consists in so arranging the detent pawl that it will engage "and'act thru the work-feeling member that controls the final closing movement of the pivoted jaw to retain that jaw in open position when swung back out of engagement with the work.

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 drawings.

Fig. 1 is a perspective view showing my improved tenter clip with the detent pawl acting to temporarily retain the swinging jaw in inoperative position.

Fig. 2 is a central sectional view thru the clip, showing the pivoted jaw in open or inoperative position.

Fig. 3 shows the swinging jaw as closed upon the work.

.Fig. 4 is a detail view in perspective of the detent pawl.

It is found in the practical operation of the standard tenter clip, that during the return travel of the chain when the pivoted jaw of the clip is not in engagement with the work, it will naturally swing forwardly and rest upon the face of the fixed jaw, and that the vibration of the parts during this return travel causes a detrimental Wearing action ing supportin of the gripping surfaces of these two jaws. I have shown one simple and effective means for preventing this wearing action, which is that of employing a detent pawl or member arranged to act upon the swinging jaw upon being moved from operative to inoperative position to retain this jaw out of contact with 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 construction of tenter clip by which these advantageous results may be accomplished IVith reference to the drawings, 10 designates the. body of the clip, which is provided with a lower fixed jaw 11 and two overhangarms 12 having bearings 13, drilled to receive a pivot pin 14 on which the swinging jaw 15 is pivotally mounted.

In order to hold the swinging jaw out of engagement with the work 16 the usual controller member 17 is pivotally mounted at 18 in the frame of the clip, which has a surface 19 arranged to ride upon the work and prevent the jaw from swinging down until the work is drawn outwardly from engagement with the controller, sufficiently to bite the -work. This swinging jaw is provided with a rearwardly extending arm 20 having a roll 21 engaging the wall 23 of the slot 22 in its controller member, by which construction it will be seen that as soon as the work 16 is withdrawn from under the controller member the jaw 15 is permitted to swing forwardly and grip the margin of the work and when the stretched work is released from the clip the biting edge 24 of the swinging jaw, will naturally in the standard construction of clip lie in engagement with the cooperating biting surface of the fixed jaw 11. In order to prevent this contact of the swinging jaw directly with the biting surface of the fixed jaw, I have provided a detent pawl 25 which comprises a shank portion 26 pivoted at 27 in the bracket 28, the rear end of the pawl being turned downwardly as at 29, and forked as at 30, and is provided with an antifriction roll 31 pivoted at 32 therein, and

the forwardly-extending end of this pawl is also provided with an anti-friction roll 33 which may come into engagement with a properly arranged finger to depress this end and lift the rear end of the pawl out of engagement with the wall 34 of the slot 22 of the controller member 17.

By this construction, it will be seen that when the swinging jaw 15 is moved by the usual means (not shown), during the travel of the chain, to open position, the rear end of this detent pawl 25 will drop into the slot in the controller member and engage the wall 34 thereof, thus thru this controller retain the swinging jaw in open or inoperative posi tion until such time as its roller 33 on the pawl comes in contact with its released finger (not shown) thru the travel of the chain, which again releases this swinging jaw to perform its normal work gripping function.

By the use of my improved jaw retaining detent, the swinging jaw of each clip is opened and closed but once, per chain revolution,-as against twice in the standard clip,

thus saving fifty percent (50%) of the wear and tear of the aw operating parts, also by retaining the upper jaw when swung back out of enga ement with the lower jaw, the wear from vi ration and chatter upon the workgrippingsurfaces of both jaws is obviated.

he foregoingdescription is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege ofresorting 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 claim:

1. A tenter clip having a fixed jaw, a coopcrating swinging jaw, a member for controlling the closing movement of said jaw, and gravity actuated means arranged to engage said member and releasably retain said swinging jaw when moved to released position.

2. In a tenter clip, a fixed jaw, a cooperating swinging jaw, a member movable relatively thereto and a detent pawl pivotally mounted to act automatically thru said member upon said swinging jaw to releasably retain the same when moved to released position.

5. In a tenter clip, a fixed jaw, a pivotally mounted cooperating jaw, a slotted controller member for controlling the closing movement of said pivoted jaw, and a detent member arranged to engage the wall of said slot in said controller when the pivoted jaw and controller are moved to released position.

6. In a tenter clip, a frame, a fixed jaw, a movable jaw, a controller member for controlling the movement of the movable jaw, a member pivoted on said frame provided with a roll at one end for engaging said controller member to obstruct its closing permitting movement. r

7 In a tenter clip, a'frame, a fixed jaw, a movable jaw, a controller member for controlling the movement of the movable jaw, a member pivoted on said frame having one .end positioned to engage said controller member to obstruct its closing permitting movement, an anti-friction roll on the opposite end of said member for engagement with the release finger.

8. In a tenter clip, a frame, a fixed jaw, a movable jaw, a controller member for controlling the movement of the movable jaw, a member pivoted on said frame provided with a roll at one end for engaging said controller member to obstruct its closing permitting movement, and an anti-friction roll on the opposite end of said member for engagement with the release finger.

In testimony whereof I aflix my signature.

WILLIAM A. STELLING.

3. In a tenter clip, a fixed jaw, a cooperating swinging jaw, a controller member for said swinging jaw, and a swin ing detent member movable relative to sai controller member mounted to act thru said controller member to releasablyretain said swinging jaw when moved to released position.

4. In a tenter clip, a fixedjaw, a ivotally mounted cooperating jaw, a control er mem ber for said pivoted jaw, a detent pawl pivotally mounted on the clip to be moved into retaining engagement with said controller to releasably retain said pivoted jaw when swung back to released position.

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