US934010A - Lifting-dog. - Google Patents

Description

n. BARRY @a E. EVANS.

LIFTING DOG.

APPLIGATION FILED SEPT. 28, 1908.

Patented sept. 14, `1909.

2 SHEETS-SHEET 1.

Masses @7267x5075- ana'djaryjg E?! f' Wyorzzey ZW@ 7a S D. PARRY & E. EVANS.

LIFTING DOG.

APPLIOATION FILED s211128, 190s.

934,01 O. Patented Sept. 14, 1909;

2 SHEETS-BHBET 2.

I I I I I I I I I I I I I I I I UNEF-D STAAN am@ DAVID PARRY, or nowLeIs, AND EvANnvANs, or PENYDAREN, MERTHYR, ENGLAND;

SAID EVANS ASSGNOR TO SAID PARRY.

LIFTINGr-DOG.

Specification of Letters Patent.

Patented Sept. 1d, 1909,

Application filed September 2S, 1908. Serial No. 455,168.

T o all whom it may concern:

Be it known that we, DAVID PARRY and EvAN EVANS, subjects of the King of England, residing at Dowlais, Glamorganshire, South Wales, England, and Penydaren, Merthyr, Glamorganshi're, South Wales, England, respectively, have invented new and useful Improvements in Lifting-Dogs, of which the following is a specification.

This invention has reference to liftingdogs for lift-ing such articles as metal ingots, castings, blocks of stone, and all other kinds of goods or packages for which dogs are or may be usefully employed as a means of lifting and handling goods.

This invention relates more particularly to lifting dogs, wherein means are provided by which they are rendered capable of acting automatically, that is, vwill not only when lowered or moved by a crane or other gear, close and grip the articles, but will of themselves open when suspended from the crane or other gear, and be in a position ready to engage withthe ingot, block, or other article.

The invention is illustrated in the annexed drawings, in which- Figure l shows a dog in its open position; Fig. 2 shows it in t-he closed. position; and Fig. 3 is an edge view of it.

In this dog there is employed in connec-` tion with the two sets of tongs type of levers a, jointed by the pin e, two sets of engaging and disengaging devices b, in the form, at

the lower end, of a loop with inclined sides and a horizontal transverse bar, the upper part being in the form of a rod. One of these devices is carried on each of the said tong levers, and upon the upper vertical members thereof; and they operate in connection with catches c on the angle of the lower members and cross members of the tong levers (or on the lower members), or at any other suitable place. The devices l) are connected at their upper ends to the operating and lifting chains or ropes CZ, the connection of the lower shackles z' of these chains, and the upper parts of the devices b, being by pins f, .which also pass through slots g in the upper members of the tong levers a.

The devices l) at their lower end pass through guide rings h on the upper halves of the tong levers, in which they arefree to move in all directions within limits One of the engaging and disengaging devices l) will be placed on one side of the dog, and the other on the opposite side, the object of this arrangement being that if the appliance is canted from t-he vertical plane, one set of such devices at lea-st is sure to 'come into action, and that will be sufficient.

Normally, when the dog is suspended by the :chains d, in a position for applying it on to, say, an ingot .or body to be liftedmarked x in dotted lines in Fig. Qf-the parts will be in the position shown in Fig. l; that is, the loops of the devices l) will be under the hooks c, so that the whole weight of the `dogs will be then rest-ing on these loops 7) and the hooks c. Then,when it is desired to lift a body, the dog is slung over it, and lowered a little, so that the horizontal members of the toi-ig levers a rest on t-he block, and take the weight of the dogs olf the chains; and the chains d being still further lowered, the devices I) will fall down, in which movement, the upper angle part of the loop of the devices b will slide down the back of the hooks c, and so will be pressed outward and off them, and become disengaged; and their upper rod portions will lie alongside the hooks. Then, when the lifting chains l are again pulled up, the devices ZJ-the upper rod parts of which are to one side of the hooks c-will not rengage, but will, owing to the inclined outer edges of these loops, slide up alongside of them without engaging. This further upward moveof the body and rest there, and the lower horizontal bar of each of the loops of the devices will then slide over the back of the catch c, until it has passed its tip, when it will fall inward under it; whereupon the lifting chains d are again raised, and the loop engages the hook c, and so the whole of the dogs are lifted up, they being then in the position shown in Fig. 1, ofi' the ingot. .With regard to the suspension chains d, their upper ends will be connected to the lifting fing with the adjacent levers, and

chain or rope, and their length can be anything that is desired. l

By this construction of lifting dog, the lifting and handling of articles, such as referred to, can be effected by the operator of like', where the dog levers have to be of strong and heavy construction.

What is claimed is 1. In lifting dogs, a pair of adjacent levers operating about a centrally disposed pivot, means connected with each lever for operating the same, having Vat their lower ends engaging devices which are capable of engagrevent the lifting dog operating when out o action.

2. In lifting dogs, a pair of adjacent levers each having integral horizontalland vertical portions, each horizontal portion having an aperture at the center of its length; a bolt which passes through the said aperture in each lever, and serves as a pivot therefor, and means connected with each lever for operating the same about the said bolt having a device at the lower end of each for engage ing with the horizontal members of the adjacent levers. l

3. In a lifting dog of Vthe kindherein re ferred to, levers, a hook on the lower half of the levers, and an engaging loop on the upper half of saine, connected with the slinging or supporting chains, the back surfaces of said hooks being inclined downVn ward and outward, and the Vloops being inclined at the sides, whereby whenV they are disengaging from the hooks, and lie against same, and are lifted, they slide over the side of the hooks, and do'not engage.v

' 4, A dog of the kind herein referred .to

having hooks c yonfthelower para-engaging devices t with loops at the upper-part, and

having limited' up and downmotion in said upper parts of the levers, andv lifting chains connected with said devices Z), which are raised and loweredl y-said chains,substantially as set forth.

In testimony Vwhereof we'have signed our presence of RICHARD WILFRED REEs, CHARLns EDGAR KENNY.

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