US681518A - Tongs. - Google Patents

Tongs. Download PDF

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Publication number
US681518A
US681518A US5571901A US1901055719A US681518A US 681518 A US681518 A US 681518A US 5571901 A US5571901 A US 5571901A US 1901055719 A US1901055719 A US 1901055719A US 681518 A US681518 A US 681518A
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Prior art keywords
levers
tongs
tong
bits
pivoted
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Expired - Lifetime
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US5571901A
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Richard H Stevens
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/12Grabs actuated by two or more ropes

Definitions

  • My invention is designed to overcome this difficulty and provide tongs which can be used upon widely-different sizes and thicknesses of metal; and to that end it consists in combining with the tong-levers other levers pivoted to them and provided with bits and providing actuating connections for the bitlevers, which are independent of the tonglevers.
  • 2 represents a central tong support or carrier, to the lower end of which are pivoted the tong-levers 3 3.
  • the pointed bits 5 5 are removably secured in the lower ends of forked lovers 6 6, which are pivotally mounted at the lower ends of the tong-levers, and the upper ends of the levers 6 6 are connected by links 7 to a pivot-pin 8 upon the support 2.
  • the links 7 7 are shown as being of substantially the same length as the lower arms of the tong-levers, so that when the levers are swung a parallel motion results, the levers 6 6 moving toward or from each other in parallel lines.
  • the upper tong-levers 9 9 as provided with adjustable counterweights 10 for opening the tongs when released and have shown chains 11 connected to these lever-arms and extending to the double operating-hook 12, the stem of which is hollow to receive the chain 13, which supports the tongs.
  • the operatingchains 14 extend over pulleys or sprocketwheels 15, mounted upon stub-shafts secured at either side of the double hook-shank.
  • the mechanism for swinging the bits may be varied widely, and they may be swung through difierent paths and at different rates without departing from my invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Table Equipment (AREA)

Description

No. 68l,5l8. Patented Aug.- 27, I90l. R. H. STEVENS.
TONGS.
(Application filed Apr. 13, 1901.) (No Model.)
l l H 1 W 14 H i l WITNESSES INVENTOR mm, wi m Mull UNITED STATES PATENT OFFICE.
RICHARD H. STEVENS, OE BRADDOOK, PENNSYLVANIA.
TONGS.
SPECIFICATION forming part of Letters Patent No. 681,518, dated August 27, 1901.
Application filed April 13 1901. Serial No. 55,719. (No model.)
To aZl whom it may concern:
Beitknown that I, RICHARD H. STEVENS, of Braddock, Allegheny county, Pennsylvania, have invented a new and useful Tongs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming a part of this specification, in which The figure is a side elevation showing one form of tongs constructed in accordance with my invention.
Heretofore in the handling of slabs, ingots, and other pieces of metal tongs have been used with pointed bits secured in their jaws and adapted to engage the metal piece, and with such tongs where ingots or slabs of different thicknesses and sizes are being handled it has been necessary to use a number of sets of tongs, each set having only asmall range in its capacity for handling metal by reason of the fact that beyond certain sizes the bits as they swing in in a curved path will not properly bite upon the piece.
My invention is designed to overcome this difficulty and provide tongs which can be used upon widely-different sizes and thicknesses of metal; and to that end it consists in combining with the tong-levers other levers pivoted to them and provided with bits and providing actuating connections for the bitlevers, which are independent of the tonglevers.
In the drawing, in which I show a preferred form of my invention, 2 represents a central tong support or carrier, to the lower end of which are pivoted the tong-levers 3 3. In order to pass each other properly at the common pivotal point, I bend these levers laterally in opposite directions, as indicated at 16 in the figure, the pivot-bolt 4 extending through these bent portions. The pointed bits 5 5 are removably secured in the lower ends of forked lovers 6 6, which are pivotally mounted at the lower ends of the tong-levers, and the upper ends of the levers 6 6 are connected by links 7 to a pivot-pin 8 upon the support 2. The links 7 7 are shown as being of substantially the same length as the lower arms of the tong-levers, so that when the levers are swung a parallel motion results, the levers 6 6 moving toward or from each other in parallel lines. I have shown the upper tong-levers 9 9 as provided with adjustable counterweights 10 for opening the tongs when released and have shown chains 11 connected to these lever-arms and extending to the double operating-hook 12, the stem of which is hollow to receive the chain 13, which supports the tongs. The operatingchains 14 extend over pulleys or sprocketwheels 15, mounted upon stub-shafts secured at either side of the double hook-shank. In operating these tongs the chains are wound up or paid out in the usual manner to raise or lower the tongs and to swing the jaws in or out, and when the jaws are so moved the levers 6, carrying the bits, are swung at the same time, so that the bits are moved in and out in substantially parallel lines.
The advantages of my invention flow from the pivoting of the bits to the tong-levers, together with means for swinging the bits when the tong-levers are swung in or out. This enables the bits to properly engage the metal, no matter what the size of the piece, provided it is within the limits of the capacity of the tongs.
The mechanism for swinging the bits may be varied widely, and they may be swung through difierent paths and at different rates without departing from my invention.
I claim-- 1. The combination with tong-levers, of levers pivoted to said ton g-levers and provided with bits, and actuating connections for the bit-levers which are independent of the tonglevers; substantially as described.
2. The combination with a tong-support and tong-levers pivoted thereto, of levers pivoted to the tong-levers, bits carried on the pivoted levers, and links connecting the upper portions of the bit-levers t0 the t0ng-sup port; substantially as described.
In testimony whereof I have hereunto set my hand.
RICHARD H. STEVENS.
Witnesses:
H. M. GORWIN, L. M. REDMAN.
US5571901A 1901-04-13 1901-04-13 Tongs. Expired - Lifetime US681518A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674302A (en) * 1970-12-10 1972-07-04 Dominion Bridge Co Ltd Ingot and mold handling tongs
US4678220A (en) * 1986-02-14 1987-07-07 Gabriel Edwin Z Shovel-like coupling devices with automatic material handling features
CN110524447A (en) * 2019-08-30 2019-12-03 西南电子技术研究所(中国电子科技集团公司第十研究所) Clamp force adaptive BGA device smooth transfer fixture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674302A (en) * 1970-12-10 1972-07-04 Dominion Bridge Co Ltd Ingot and mold handling tongs
US4678220A (en) * 1986-02-14 1987-07-07 Gabriel Edwin Z Shovel-like coupling devices with automatic material handling features
CN110524447A (en) * 2019-08-30 2019-12-03 西南电子技术研究所(中国电子科技集团公司第十研究所) Clamp force adaptive BGA device smooth transfer fixture

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