US580558A

US580558A - Tongs

Info

Publication number: US580558A
Authority: US
Publication date: 1897-04-13
Anticipated expiration: 1914-04-13

Description

(Nd Model.)

B. SCOTT. TONGS.

No. 580,558. Patented Apr. 13, 1897.

v 1 7L! 122 \I E i HiWEfiSES: INUEN U I RMK Oz/(ML M Y CQ SZZW A TTY EDXVARD SCOTT, OF PITTSBURG, PENNSYLVANIA.

TONGS.

SPECIFICATION forming part of Letters Patent No. 580,558, dated April 13, 1897.

Application filed May 19, 1896.

To (all ZU/LONL it may concern:

Be it known that I, EDWARD SCOTT, a citizen of the United States of America, residing at Pittsburg, State of Pennsylvania, have invented certain new and useful Improvements in Tongs, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in tongs for lifting ingots and other bodies of metal; and the object of my invention is to provide a simple and practical method of opening and releasing the tongs from the body of metal. The methods heretofore employed required the services of several men, but with my improved method one man can easily operate the tongs.

A description of my improvements will be fully shown and described in the accompanying drawings and specification, in which- Figure 1 is a side View of the tongs having my improvements attached thereto and the legs opened to receive the body of metal. Fig. 2 is also a side view with a portion of the tongs removed and showing the means for opening and closing the tongs.

Similar figures refer to similar parts in the several views shown.

To put my invention into practice, I provide a suitable pair of tongs 1, having holes 2 formed in its legs. The eyebolts 3 are loosely secured within the said holes. The right-angular blocks 4 are loosely pivoted to the said eyebolts by the pins or rivets 5. The links 7 and 8 are then pivoted to the said blocks by the pins or rivets 6 and at right angles to that of the pins 5. The said links are then loosely pivoted together by the pin or rivet 9. A flange 10 is formed upon the link 7 and beyond its pivoted point and serves as a stop or lock to prevent the turning of the links past their center. A handle 11 is secured fast to the link 8 for the purpose of operating the links. Attached to the upper ends of the legs are the chains 12. A ring 13 is secured to the said chains, connecting them together. A rod 14:, having a hook or eye 14 formed upon its upper end, is secured to the said ring. Upon the lower end of the said rod is formed the head 15. The plates 16 and 17 are loosely mounted upon the rod,

in the county of Allegheny and Serial No. 592,207- (No model.)

and the spiral spring 18 is arranged between the plates and loosely surrounds the rod. The U-shaped link 19 is loosely mounted to the said plates and is held secure by heads 20 to the plate 16. A chain 21 is attached to the link and also attached to the clevis 22, the said clevis being loosely secured to the pivotbolt 23, which secures the legs of the tongs together. The object of this arrangement is to transfer the strain from the legs to the center of the tongs, chains, &c., when the object is lifted by the tongs, as will be readily understood in the operation. The tongs are attached to a crane by the ring 13.

In operating the tongs the legs and jaws are spread apart, as shown in Fig. 1. The jaws are then let down over the body to be lifted. The handle 11 is then lifted up at right angles to the tongs and turned sidewise, so as to open the links, as shown at Fig. 2 by the dotted lines. This operation closes the jaws upon the body or object to be lifted. The object is then transferred to the place desired by means of the crane. In releasing the object or body from the tongs the handle is again lifted up at right angles to the tongs and turned, which operation closes the links and draws the legs inwardly and the jaws outwardly, thereby releasing them from the object.

It will be readily seen that when the object is suspended by the tongs they may be readily and easily opened, as the weight is almost entirely suspended by the chains, &c. The holes 2 may be located at various points along the legs and the eyebolts attached thereto according to the size of the object to be lifted.

Having thus fully shown and described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination with a pair of tongs, a

means of relieving the strain from the legs,

consisting of the following parts: the chains 12 secured to the upper ends of the tongs, the ring 13 secured to the said chains, the rod 14 secured to the said ring, plates 16 and 17 loosely connected to the said rod, spiral spring 18 surrounding the said rod and adapted to operate between the said plates, the U shaped link 19 loosely secured to the said plates and adapted to operate therewith, the chain 21 connected to the said link and the clevis 22 connecting the said chain to the pivoted point of the tongs, all parts arranged and adapted to operate, substantially as shown and described.

2. In combination Withthe herein-described tongs, a means of opening and closing the said tongs consisting of the following combination of parts: the eyebolts 3 loosely pivoted or secured to the said tongs, the angular blocks 4 pivoted to and at right angles to said eyebolts, links 7 and 8 pivoted together and their ends pivoted to and at right angles to pivoted points of said blocks, the handle 11 secured fast to one of the said links and adapted to operate the said links, substan- I tially as and for the purpose specified.

In testimony whereof I affiX my signature in presence of two Witnesses.

EDWVARD SCOTT. Vitnesses:

JAS. J. MCAFEE, RICHARD S. HARRISON.