US670891A - Machine for making clamps. - Google Patents

Description

No. 670,891. I 4 Patented Mar..26, l90l. F. P. CADY.

MACHINE FOR MAKING CLAMPS.

(Application filed Oct. 15, 1900.)

(No Model.) 2 Sheets-Shunt I.

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Patented Mar. 26, l90l. F. P. CADY.

MACHINE FOR MAKINGGLAIPS.

(Application filed Oct. 15, 1900.)

. No. 670,89l.

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. (No llndol.)

UNlTliD STATES PATENT @FFICE.

FRANK I CADY, OF CLEVELAND, OHIO, ASSIGNOR, TO DANIEL W. AYLWVORTII, OF SOUTH HAVEN, MICHIGAN.

MACHINE FOR MAKING CLAMPS.

SPECIFICATION formingpart of Letters Patent No. 670,891, dated March 1901- Application filed October 15, 190i]- s'erial No. 83,098. (No model.)

To all whom it may concern:

Be it known that I, FRANK P. CADY, a citizen of the United States, and a resident of Clevelanchcounty of Cuyahoga', State of Ohio, have invented certain new and useful Improvements in Automatic Machines for Making Clamps, of which I hereby declare the following to be a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to automatic machincry for manufacturing a slitted and curved metal clamp adapted for use in securing the crossing of the wires in wire fences.

The invent-ion consists in the feeding, cutting, and forming devices and in the detailsof the various parts, as hereinafterdescribed, shown in the accompanying drawings, and specifically pointed out in the claim.

In the accompanying drawings, Figure l is a rear view of the machine. Fig. 2 is a side view. Fig. 3 is an enlarged vertical section taken through the center of the metal ribbon from which the clamps are formed. Fig. 4is an enlarged vertical section of the machine on line X X, Fig. 3. Fig. 5 is a detail view of completed clamp. Fig.'6 is a detail illustrating the first part of the act of forming the curved wings. Fig. 7 shows the completion of the act. Fig. 8 is a detail view of cam which operates the sliding plate which holds the forming and withdrawing pins. Fig. 9 is a detail of forming-dies, and Fig. 10 is a detail of forming-pins and sliding head.

In the views, 1 is the frame, and 2 the driving-shaft, upon which are the driving and fly wheels 3 and t and the eccentric 5, which, by means of the connecting-rod 6, rotates the shaft 7 of gear 8, through which the shaft 9 is also rotated in the opposite direction. Upon the forward extremities of these shafts are mounted the rollers 10 and 11, the upper one, 10, being provided with the annular projection and the lower one with the annular groove 13. Between these rollers is fed the m etal ribbon 14., in which is pressed the groove as it traverses the r9 ls. A ratchet-wheel 16 and dog 17 prevent the roll-shafts from turningbackward, but permit this beingdone when it is desired to remove a faulty ribbon there-from. As soon as the ribbon-has passed through the rolls it enters the guide-plates 18 and 19 and passes out the required distance to form a blank for a clamp. It then rests at the forward part upon a tongue 20, projecting from the inclined plate 21, upon which it is finally discharged. Before it is discharged from the machine, however, it is cut off and formed, as shown in Fig. 5, with acentral tongue 22 and curved side portions 23. This is accomplished by means of the following mechanism: Upon the main shaft 2 is placed the eccentric or crank 24, which reciprocates the cross-head 25 by means of the connectingrod 26. Upon this cross-head is placed the knife-edge 27, which upon the upward movement of the cross-head shears off the metal ribbon against the outer edge 23 of the upper guide. Simultaneously with this movement the two dies 29, separated at the center. at t0 the width of the central tongue 22 of the clamp, rise and press upward the side wings 23 of the clamp, shearing them from the tongue by passing on either side of the metal strip 31, which is supported in the head 32 of the machine. At this momentthe pins 33, secured to the sliding head 34, are placed tical wings against the tapered extremity of the die-block 36, when the wings will be pressed over thepins 33 and will take the finished shape (shown in Fig. 5) ready to drop upon the inclined plate for removal.

The reciprocating slide 34 is operated by rock-arms 37 and 38, link 39, and cam 40 upon the main shaft, a roller l1 following the camgroove, which is circular for a portion of its curve, thus giving a moments rest to the slide while the metal is being bent over the pins.

I do notlimit myself to any one form of detail, of which there are many equivalents which could be equally well adapted to use in their place; but

What I claim as new, and desire to secure by Letters Patent, is

In an automatic machine for manufacturing clamps for the purpose described, feeding and grooving rollers, guides through 7 which the metal ribbon is fed, a reciprocating head, provided with a cutter and slitting dies, fixed dies, above said reciprocating head against which said cutter and slitting dies 5 act, pins secured to a reciprocating head, upon which the side portions of the clamp are bent when the dies have separated them from the central portion, projecting dies underneath which said pins pass so constructed and 10 arranged as to bend down the detached side portions upon the pins as the clamp passes, and means for operating the various parts, substantially as described. 7

In testimony whereof I have signed my name to this specification in the presence of [5 two subscribing Witnesses.

FRANK P. OADY.

Witnesses:

WM. M. MONROE, RALPH R. RULE.

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