US845724A - Lewis. - Google Patents

Description

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F. E. WHIDDBN.

LEWIS, APPLICATION FILED MAY 17, 1906.

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vFRANK E. WHIDDEN, OF CONCORD, NEW HAMPSHIRE.

Specicaton of Letters Patent.

Patented Feb. 26, 1907.

Application filed May 17, 1906. Serial No 317,394.

To rif/ZZ whom t may concern:

joined to arm Athat in its downward direc- Be it known that I, FRANK E. WHIDDEN, a j tion it will slant toward end a of the arm A citizen of the United States, residing at Ooncord, in the county of Merrimack and State of New Hampshire, have invented a new and useful Lewis, of which the following is a specification.

My invention relates to improvements in a lewis for the lifting of heavy blocks of granite and other stone; and the objects of my improvement are, rst, to provide a lewis made of one piece of metal, and, second, to obviate the necessity of drilling more than one hole in the block to be lifted or of making a dovetailed hole, and thereby to cheapen the cost of handling the stone. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the improved lewis. Fig. 2 is an end elevation, and Fig. 3 shows the lewis inserted in the stone to be raised and the method of connecting with the lifting-tackle.

Similar letters refer to similar parts throughout the several views.

The lewis is made of one piece of steel or other substance of sufiicient strength and, as shown in Fig. l, consists of two arms A and B. The arm A may be of any size to secure the necessary strength and of any desired shape, the only necessary feature being that at or near one end a there shall be a point or bearing which will press against the stone when that is being raised. As shown in the drawings, Figs. l and 2, arm A is a flat piece of steel of a thickness equal to the diameter of arm B, the edges being chamfered or otherwise worked to be more pleasing to the eye. At or near the end a of arm A is a hole c to receive a ring or link O. At or near the other end a is a bearing of some form, which in operating the device presses against the upper face of the stone. In the drawings it is shown as a pyramidal projection d, although it may be of any form or may be the end a of the arm itself. The arm B is of a cylindrical or boltshaped form of any desired length and diameter. It is either of one piece with or solidly fastened to arm A and preferably at a point nearer end a than end a. Arm B may project from arm A at any angle, providing the direction of a force exerted upward on ring O shall not be parallel with the length of B; butin practice in order to insure that arm B be not pulled out while operating it is desirable it be so the stone and slant toward the center.

with reference to a plane parallel with the top face of the stone when the device is in position for operation-that is, when arm B is inserted into the drill-hole of the stone and the bearingpoint on the end a of arm A rests against the stone. In Fig. l of the drawings this plane is represented by the line a b.

In the use of the lewis a hole is drilled into the stone of a sufficient diameter and depth to easily receive the arm B of the lewis and allowing but little, if any, play. This hole should have the same angle with the face of the stone as B has to the plane c1l b, as described, and the top of the hole should be a little to one side of the longitudinal center 1fpf T e better Way is to commence the hole a distance from the center sufficient to bring the bottom of the hole practically at the center of the stone. After the hole is drilled arm B is inserted therein, the lifting-tackle attached to ring O, and when the power is applied end c of arm A is raised, causing the bearing point on end c to press against the stone and arm B to press against the upper side of the drillhole. As B enters the stone slantingly, it is impossible to Withdraw it by a lifting force applied to the end a of A, while the fulcrum d presses the stone at a point opposite the end a. After the stone has been lifted and placed in its desired position the lifting force of course will be withdrawn, and arm B can be easily taken out by a slight pull in a direction parallel with the drill-hole.

To carry out the idea of my invention, the arms must be immovable in respect to each other during the `operation of raising and lowering the stone, although when not in use some might prefer to have the joints flexible; but it would still be within the spirit of my device; also the end a of arm A might be made in the form of a separate arm without violating the principle here disclosed.

I claim- 1. A lewis composed of one solid piece, having two arms.

.2. A lewis composed of one piece, having two arms, joined angularly to each other.

3. A lewis made in one piece having two arms, angularly joined, and one arm projecting on both sides of its juncture with the other arm.

4. A lewis made in one piece having two arms joined angularly to each other, one arm IOO IIO

i being adapted for insertion into a drill-hole of the stone to be lifted, and the other arm having means for fastening lifting-tackle thereto.

5. A lewis made in one piece having two arms joined angularly to each other, one arm being adapted to be inserted into a drill-hole in the stone to be lifted, the other arm provided at one end with means for attaching lifting-tackle, and at the other end with a bearing to press against the surface of the stone to be lifted.

6. A lewis having three arms solidly attached to one another, one arm being adapted to be inserted into a drill-hole in the stone to be lifted, and joined angularly with a second arm, which second arm has means for attaching lifting-tackle and the third arm having a bearing, which, when the 'first arm is in position in the drill-hole of the stone, bears upon the surface of the stone.

FRANK E. VHIDDEN Witnesses:

ETI-IEL M. DAY, M. A. CONWAY.

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