US1646255A - Clamp - Google Patents

Description

Och 18 1927' H, J. MUEHLEMAN CLAMP Filed July 25, 1926 ,.@umlll INVENTR f7 @www Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

HENRY J'. MUEHLEMAN, OF HAMILTON, ONTARIO, CANADA.

CLAMP.

Application led July 23, 1926. Serial No. 124,427.

ductivity between the two conductors andv in which the connection between the conductors will be of great security, and which at the same time will be simple to manufacture and easy to place in position.

I attain'myrobject by formlng my clamp of a pair of clamping members between which the ends of the conductors are secured, and usually, though not necessarily,

a spacing member which is positioned between the conductors. In cases where the conductors are formed of different metals, for instance, one of aluminum, and the other of copper, one half of the spacing member and one of the clamping members w11l be formed of or lined with metal similar to one conductor and the other half of the spacing member. and the other clamping member will be formed of or lined with metal similar to the other conductor.

For clamping the parts together, I find that the tightest joint is obtalned by forming lugs on one clamping member and passing U-bolts around the back of the other clamping member, the legs of the U-bolts passing through holes formed in the lugs on the other memberA and having nuts screwed thereon.

The construction is hereinafter more speciically described and illustrated in the accompanying drawings in` which Fig. 1 is an end elevation of my improved clamp;

Fig. 2 a side elevation of the same;

Fig. 3 an end elevation of a modified form of spacing member; and

Fig. 4 an end elevation of a further modified form of spacin member.

In the drawings li e numerals of reference indicate corresponding parts ,in the diHerent figures. y

1 and 2 are the conductors to be connected, the conductor 1 being formed, for example, of copper, and the conductor 2 of aluminum.

These conductors are placed one at each side of a spacing bar 3, which is formed with opposite faces grooved for receiving the conductors. At the other side of each of the conductors are placed grooved members 4 and 5.

In order that I may have a good electrical contact between the conductors and the spacing bar and grooved members, I preferably form the grooves of V-form so that there will be a two-1ine contact between each conductor and the adjacent parts of the clamps as shown in Fig. 1, instead of a single line contact as would be the case if the conductor touched the bottom of the groove and the groove slightly larger than the conductor as is often the case.

In order to clamp the parts together to form a secure and effective joint, I form on the grooved member 4 lugs 6 havin holes formed therein for the passage of egs of U-bolts 7. The back of the grooved member 5 is preferably formed with a longitudinal strengthening rib 5 provided wlth indentations or grooves forming lsaddles to receive the, U-bolts, thus preventing slipping of the latter. Transverse ribs 5b are formed in alinement with the saddles to strengthen the member 5 and support the U-bolts. By screwing up nuts 8 on the legs of the U-bolts tightly against the lugs 6, a very tight connection may be obtained.

It will be understood, of course, that the parts of the clamp may be of any desired length and also that any desired number of U-bolts may be employed.

The spacing member shown in Fig. 1 is intended for one heavy and one light cable.

In Fig. 3 I show a modification of the spacing member which is adapted for use with two heavy cables, while in Fig. 4 1' show a modification of the spacing member which is adapted for use with two li ht cables. It will be noted, however, y t at where a light cable is employed, the spacing member is bevelled oil to each side as at l() to enable the spacing member to be received in the grooved member 4 or 5 as the case may be.

What I claim is:

In a clamp for connecting electricalv conductors, the combination of an upper grooved member having a 1o 'tudinal rib on its upper member, said lower member havin back provided with mdentations therem lugs thereon provided with holes throng forming a. saddle; a U-bo1t adapted to pass which the legs of the U-bolt are adapted to l0 around the said member and to sit in the pass.v 4

I saddle; transverse ribs in alinement with the Si ned at Hamilton, Ontario, Canada, this indentations, a lower grooved member, the 8th ay of July, 1926. groove whereof faces the groove of said HENRY J. MUEHLEMAN.

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