US557480A

US557480A - Skelp tongs

Info

Publication number: US557480A
Authority: US
Publication date: 1896-03-31
Anticipated expiration: 1913-03-31

Description

(No Model.) 2 sheets-sheet 1. i

P.BOYD.

SKELP TONGS. No. 557,480. Patented Mar. 31, 1896.

WITNESSES INVENTOR Ma@ QM @g/gm Mkmamm ANPREW B.GRAHAM. PHUO-UTNQWASHIN GTO". D.C.

(No Model.) 2 Sheets-Sheet 2.

P.B0YD. y SKEL? TONGS. u No. 557,480. Patented-Mar. 3l, 1896.

WITNESSES INVENTOR Mfwfw @MW c/9m mmmm UNITED STATES PATENT OFFICE.

PETER BOYD, OF VIIEELING, NVEST VIRGINIA, ASSIGNOR TO THE RIVERSIDE IRON WORKS, OF SAME PLACE.

sKl-:LP-ToNes.

SPECIFICATION forming part of Letters Patent No. 557,480, dated March 31, 1896.

Application led March Z9, 1895. Serial No. 543,670. (No model.)

To all whom it may concern.-

Be it known that I, PETER BOYD, a citizen of the United States, residing at lVheeling, in the county of Ohio and State of W'est Virginia,

have invented or discovered certain new and useful Improvements in Skelp Tongs, of which improvements the following is a specification.

Considerable difficulty is experienced in the 1o use of the lazy-tongs type of bell-welding tongs, for the reason that the pivots connecting the inner arms of the tongs are brought into line with each other when the grippingjaws are closed, or nearly closed, and thereby permit the gripping-jaws to swing or rotate on the intermediate pivots. Hence the workman will not be able to control the grippingjaws by the reins.

The object of the present invention is to provide a stop whereby this independent swinging or rotation of the jaws is prevented and the workman is enabled to control the gripping-jaws at all times.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of pipe-gripping tongs embodying my invention. Figs. 2 and 3 are similar views illustrating certain modifications of my improvenients.

In the practice of my invention the reins, consisting of the long arms 1 and short arms 2, are pivotally connected together in the usual manner by a pin 3, and to the ends of the short arms 2 are pivoted the arms 4 of the gripping-jaws 5, said arms being pivotally connected by a pin 6. The joint between the short arms of the reins and the arms 4is formed by passing a pin through the overlapping ends of said arms, and as these pivotpins come into line with each other as the jaws are closed the latter are free to move together on said pins, so that the workman loses control of the jaws. In order to overcome this diiiiculty, I form the joint by laterally recessing the sides of the

arms

2 and 4, thereby forming at the end of each arm a tongue 7 and a shoulder 8 at the rear of the tongue. As shown in Fig. 1, the shoulder is straight and passes at an angle greater than a right angle across the arm. The tongues are made of the same length, and in fastening the arms together the tongues overlap, the tongue in one arm passing into the recess in the other arm and the pivot-pin 9 passing through the tongues midway of their length. It results from this construction that while the tongues are free to turn in their recesses while opening the jaws the tongue on one arm will bear against the shoulder on the other arm, when the two arms are brought into line with each other, thereby preventing any further movement of the two armsthat is to say, the

arms

2 and 4 are free to be moved out of line with each other in one direction,` but are held as against such movement in the opposite direction. This holding of the

arms

2 and 4 as against movement out of line with each other in more than one direction can be effected, as shown in Fig. 2, by securing or burning strips 10 on the edges of the arms 2 in such manner that when the

arms

2 and 4 are brought into line with each other the free ends of the strips will bear upon the edges of the arms 4 and thereby hold the latter as long as the jaws are closed inline with each other. In the construction shown in Fig. 3 this holding of the jaws in line with the reins when closed is effected by means of a strip 1l having one end connected to the pivot-pin 6 of the jaws and provided with a slot l2, through which passes the pivot-pin 3. This strip extends back a short distance between the reins, which are provided on their outer edges with inwardly projecting lugs 13, adapted to .bear upon opposite sides of the strip when the reins are closed, thereby preventing any swinging of the closed jaws on the pins connecting the

arms

2 and 4.

lVhile I have shown and described several embodiments of my invention, the latter is not limited to such constructions, but consists in the provision in the lazy-tongs type of grippers of means for holding the grippingjaws when closed or approximately closed in line with the reins.

One of the reins is provided on its inner face With ribs or lugs 14, arranged a sufficient distance apart to permit of the entrance of the other rein, whereby the two reins are held together.

I claim herein as my inventionl. 4Pipe-drawing tongs vhaving in combina- IOO 1o j aws, the inner ends of the arms of the jaws and reins being pivotally connected, one pair of arms being provided with shoulders against which the ends of the other pair of arms will bear when the jaws are closed and thereby hold the reins and jaws in or approximately in line with each other, substantially as set forth.

In testimony whereof l have hereunto set my hand.

PETER BOYD.

lVitnesses DARWIN S. WoLoor'r, F. E. GAITHER.