US2414180A

US2414180A - Safety ground clamp

Info

Publication number: US2414180A
Application number: US601593A
Authority: US
Inventors: George G Truax
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-06-26
Filing date: 1945-06-26
Publication date: 1947-01-14
Anticipated expiration: 1964-01-14

Description

Jan. 14, 1947. G, G, RUAX 2,414,180

SAFETY GROUND CLAMP Filed June 26, 1945 fiver/folflow e Dada;

Patented Jan. 14, 1947 UNITED STATES PATENT OFFICE l 2,414,180 SAFETY GROUND CLAMP George G. Truax, Renton, Pa. 3 .Applicationlu'ne V26, 1945, Serial No. 601,593

4 Claims. (Cl. 173-4273) tive is moving away from the point of ur on its return trip.

ment but to ecome automatically disengaged Referring to the drawing, I desi n t s the ca le from the rail as the locomotive approaches said which is wound on a reel carried on the upper point on its return path f tr v l, portion of the locomotive and is maintained in easy to apply to a rail, and. automatic in its disclamp member 5. Rai1 clamp member 5 comreaches a point ad acent th c n t on t extending arm portion 1 to the end of which wire turn tr1p toward Sald c nn t 4 is connected Rail-engaging portion 6 com- Further objects and advantages of the invenprises a ge rally channel-Shaped body adapted tion will appear from the fgflowjng description t0 fit over the rail head, the side Walls of said body and claims, and from the accompanying drawing, being w d y Converged r m the fr n d wherein: rear ends of the body to define a central con- Figure 1 is a perspective View showing t raj] stricted region adapted to closely fit and frictionconnector device applied to the rail of a mine ally engage the rail head when cable I is in tenrailway in operating position, sion. At diagonally opposite corners of portion Figure 2 is a view in side levatio of th 6 the side walls are formed with triangular lug nector device employed in Fi r 1,

elements

8, 8 adapted to underlie the rail head Figure 3 is a bottom view of th o n t when the connector has been rotated into gripvice of Figure ping position, said lug elements defining a pas- Figure 4 is a cross-sectional view taken on line Sageway for receiving the rail head in the Process 4-4 ofFigure 2. of mounting the connector thereon. To facilirdinarily the main passages in a mine are tate the automatic disengagement of the conried on a reel under tensio m t d on t up 40 of the inner side Wall surfaces of the channelhand when the locomotive returns to the junction neI-shaped body to allow the connector to be point. Quite frequently, the locomotive. operator, thus rotated out of engagement with the rail head when returning to the junction point with aloadby the upward component of force exerted by ed train, is unable to stop and frequently runs the cable on the approaching locomotive.

aver the cable, causing short circuits and other While a specific embodiment of a connector device for an electric mine locomotive has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that-no limitations be placed on the invention other than a defined by the scope of the appended claims.

What is claimed is:

.1. A rail clamp device comprising a generally channel-shaped body member adapted to engage a rail head and an arm extending laterally from said body member, the inner side wall surfaces of said body member converging to define a reduced intermediate section for said body member, diagonally opposite nd portions of said inner wall surfaces being downwardly and outwardly inclined. g 2. The structure of claim 1, and wherein an inwardly extending lug member is provided on the side wall opposite each of the downwardly and outwardly inclined surfaces, said lug members defining a rail head-receiving space with respect to said inclined surfaces.

3. A rail connector device for a mine locomotive comprising a generally channel-shaped body member adapted to engage a rail head and an arm extending laterally from the inner side wall surfaces of said body member converging from the front and rear ends of said member to define a reduced intermediate section adapted to frictionally grip a rail head, diagonally opposite end portions of said inner wall surfaces being downwardly and outwardly inclined, and the other diagonally opposite end portions of said inner wall surfaces being formed with inwardly projecting lug elements adapted to underlie the rail head. 7

4. The structure of elaim 3, and wherein said lug members define a rail head-receiving space with respect to said inclined wall surfaces, the space provided being such that the connector device may be rotated off the rail head by a light 20 upward force applied to the arm.

GEORGE G. TRUAYIIC. I

said body member,