US905773A - Grounding-clamp for electric wires. - Google Patents

Description

W. H. VIBBER. GROUNDING CLAMP FOP. ELECTRIC WIRES. urmm'non rum) APR. 11, 1908.

905,773. Patented Dec. 1, 1908.

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UNITED STATES PATENT ()FFICE.

\Ylllrll'llililt ll. VlBllllR, 01" NEW LONDON, CONNECTICUT, ASSIGNOR OF ONE-HALF TO THE GROUNDING-CLAMP FOR DON, CONNECTICUT, A CORPORATION.

ELECTRIC WIRES.

Patented Dec. 1, 1908.

Application filed April 11, 1908. Serial No. 426,563.

To all whom. it may c-mrvrn:

' Be it known that l g a citizen of the United States,

New London, in ll new and useful lni Ham )8 for Electric \Vircs' and I do herebv l residing at 10 county of New London have invented a provoment in Groundingdeclare the following, when taken in connection with the accompanying drawings and the letters of refere a lull, clear, and same, and which cc marked thereon, to be descriptlon ol the rawmgs constitute exact said (1 part of this specification, and represent, in-

Figure l a view ing-clamp constru my invention and wire in place.

in elevation of a groundctcd in accordance with shown with a groundingg. 2 a view on the same scale of the clamp in side elevation. Fig. 3 a

view of the clamp line a-b of Fig. 1.

in vertical section on the Fig. 4 a sectional view of the clamp on the line cd of Fig. 1.

My invention relates to an improvement in roundim clam )s provide a compact, convenand eliective grounding clamp object being to lent, durable constructed wlth cheapness and simplicity, to dispensing with for electric wires, the

particular reference to the use of solder, and to bringing the ground ing wire into direct cable to winch the contact with the pipe or clamp is applied so that the current will flow directly from the cable or pipe to the wire rather than through any intermediate parts with these ends sists in a ground having certain (I be hereinafter d In carrying out shown, I employ a sheet-copper and tially circular bod in view my invention coning clamp for electric wires, etalls of construction will escribed and pointed out 111 my invention as herein strap preferably made of bent to form a substanv 2 approximately correspending in diameter to the diameter of the pipe or cable clamp is'to be applied.

to which the grounding The said strap is made long enough to form two arms 3, 4,

projecting radially from the said body 2 and having alined perforations 5 for the reception of a bind end with a slotted an ordinary nut 7. are bent toward e contact at their clamp is in use, ant

ing screw 6 formed at one head and provided with The said arms 3 and 4 ach other so as to make extreme ends when the l the holes 5 are located so \l'narznan ill. Woman, I

l close to the said body 2 that the polygonal nut 7 engages with the body and is thereby l prevented from turning, compelling the turn- If preferred the head of.

is commonly done.

polygonal for the apl the screw may be made plication of a wrench.

For the reception of the I that portion of the strap forming the body 2 is upset from the inside at'a point opposite the said arms 3 and 4 so as to form a segmental inwardly opening groove or sent 9 running parallel with the length of the strap and therefore located in the plane of the clamp. This groove will substantially correspond in cross-sectional curvature to the curvature of the grounding-Wire 8 so that as the wire is forced out into this groove by the cable or pipe, it will make extended contact with the metal of the clamp. At the ends of the said roove the clam is formed with radial perforations 10 for tlie grounding-wire 8 into the groove. One of these perforations 10 will answer all purposes though it is more convenient to have two as shown. The grounding-wire .8 by bein in I troduced in this manner into theinside o the ly of the clamp is brought not only into I direct contact therewith, but also into direct contact with the pipe or cable by which it is forced into the said groove. Thisconstruction therefore provides for the direct passage of the urrent from the wire or cable to the grounding-wire. formed with an opening 12 whic may be used for solderin the wire to the clamp, if desired though this is not essential.

I claim:

1. A grounding clamp having a wroughtmctal strap bent to form a substantially circular body, and two radiall projecting arms which are perforated for tie reception of a binding-screw, thesaid body being formed with an inwardly opening groove-like seat for the reception of the grounding wire, and with one or more lateral openings leading into one or both ends of the said seat! 2. A'grounding clamp having a'wrought metal strap bent to form a substantially circular body, and two radiall which are perforated for the reception of a binding-screw, the said body being formed witlr'a-n inwardly o ening groove-like seat for the reception of t e grounding wire, and

ing of the screw itself rather than the nut as entrance of the projecting arms grounding-Wire 8,

The clamp is by reference with two lateral openings respectively 10-] the reception of solder, and also with a cated at the ends of the said seat for the en-. lateral opening leading into one endof the trance and exit of the wire. seat. I

3. A grounding clamp having a Wrought- In testimony whereof, I have signed this 1.5

5 metal strap bent to form a substantially cirspecification in the presence of two subscrib- 1ifzulerl' body, and two radially'extendinlg arms ing Witnesses;

' or t 1e reception of a binding screw,-t e said body being formed with an inwardly opening WHEELER VIBBER' groove-like seat for the reee tion of the Witnesses:

10 grounding wire; with a latera opening 10- BENJAMIN WHITE,

cated between the ends of the said seat for JAMES D. GAFFNEY.

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