US1094852A - Insulator-pin. - Google Patents

Description

J. LHEQHT & J. o. GAPBN.

' INSULATOR Pm APPLICATION FAILED AUG. 4, 1911.

1,094,852. Patented Apr. 2 8, 1914.

UNITED STATES PATENT OFFICE.

JULIUS L. HECHT, OF EVANSTON, .AND JOTHAM C. GAPELL OF OAK PARK, ILLINOIS,

ASSIGNORS OF ONE-HALF T0 ELECTRIC SERVICE SUPPLIES COMPANY, QF PHILA- DELPHIA, PENNSYLVANIA, A CORPORATION 0F NEW JERSEY.

INSULAT OR-PIN.

Specification of Letters Patent.

Application tiled August 4, 1911.

To UZ] Awhom 'it may concern.'

Be it. known that we, J ULIUs L. HECHT, a resident ot Evanston, in the county of Cook and State of Illinois, and J oTHAM C. GAPEN, a residentot' Oak Park, in the county of Cook and State of Illinois, citizens of the United States, have invented new and useful Improvements in Insulator-Pins, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

lOur invention relates to improvements in insulator pins of that class in which is provided a strain taking base, heldl in .position by a bolt passing through the cross arm, which bolt is adapted to receive the insulator.

One of the objectsof our invention is to provide a pin of this type which may besecured upon the cross arm of the conductor carrying pole prior to the erection of the pole, in position to receive the insulator after the pole has been erected.

It is a further object of our invention to provide an insulator pin of this type of such construction that the insulator may be rotated to any position even. though the base portion is Xed, so that the conductor receiving groove in the insulator will be in valinement with the'conductor.

.For the purpose of disclosing our invention we have illustrated one embodiment thereof in the accompanying drawings.

Insaid drawings Figure l is a transverse sectional view ot' an insulator pin constructed according to our invention and shows the supporting pin attached to a cross arm; F ig.

2 is a perspective view showing the pin mounted on a cross arm.

In the construction illustrated we provide a base member l which preferably consists Y of a hollow tubular portion provided with tapering angularly disposed strengthening ribs 2. The hollow base portion terminates in a rectangular bottom 3 which is somewhat curved or inclined in transverse section as shown in Fig; 1. This curvature not only acts as a water shed to shed the rain or moisture, but also permits the bottom to fitover the curved or rounded top on the cross arm t and places the strain on the outer edges of the cross arm. The rectangular bottom is provided with a paiiuot downwardly extending lips 5 which fit over the 55 sides of the cross arm to prevent the base lower end as at 6 to receive the securing nut 7. The upper end of the bolt 5 is provided" with a collar S arranged during .the erection ot the pole to engage an internal annular flange E) formed in a recess'lO in the base o5 member. "We have shown the collar 8 as being integrally formed with the bolt 5, butv it will be understood that any form of collar may be used if desired. as for instance, a nut may be secured upon the threaded portion 11 I0` of the bolt.A The bolt 5', at its upper end, is threaded as at 11 to receive the threaded thimble 12 of the insulator 13.

"We have shown in the drawing the collar S in the position which it finally assumes 'I5 after the insulator has been secured upon the pin. In this position it willbe notedy there is a slight clearance between the collar 8 und the annular flange 9. This clearance is particularly provided so that the thimble 12 80 of the insulator will engage the upper surface of the support 1 in order to insure as much ot the lateral strain as is possible being taken by the support and to relieve as much as possible the bolt 5 from any-lateral 85;y

strain. In securing the base 1 to the cross arm prior to the erection of the pole.l however, it is customary to have the collar engage the annular tiange 9 in thebase member to hold the base member in position until after the pole has been erected and the insulator secured in position. This collar Aalso serves the additional purpose of preventing the bolt from dropping out of the base and cross arm when a damaged insulator is re-KL moved prior to the installing of a newA in#yk sulator.

In the erection of electrical transnnssion\.

lines it is desirable that as much of the equipment as possible be assembled prior to the erection ot the poles. It-is therefore desirable that the insulator pins be secured in position prior to the erection oi' the poles` It is' also desirable that some means be providcdafter the erection ot the pole whereby the insulators which are to be used may be readily secured to the pin and then aimed so that the conductor receiving groove will be in proper alinement with the conductor. The collar 8 serves to lock the base member l to the cross .arm prior to the erection of the pole and at the same time does not interfere with the rotation of the insulator to properly aline the groove thereof with the conductor and does not interfere with the proper engagement between the thimble l2 and the top surface of the base. j

While we have shown and described one embodiment of our invention it will be understood that various modifications and changes may be made therein without departing from the spirit of our invention as set forth in the accompanying claims. y

Having thus described our invention, what we claim as new and desire to secure by Letters IPatent is:

l. The combination with an insulator support comprising a hollow base mounted upon a cross-arm, a bolt for securing said base in positionl on the cross-arm screw-threaded at both endsl one end projecting beneath the cross-arm to receive a nut and the other end projecting above the base, of an insulator comprising a conductor-carrying member and an internally screw-threaded thimble screwing on said projectingend of the bolt engaging the top of the base and clamping the base onto the cross-arm, and laterally projecting means on the bolt below the top of the base and independent of the insulator for preventing the bolt from dropping through the arm when the base and bolt alone are assembled on the cross-arm, said means permitting a free vertical movement of the bolt with respect to the base to allow the insulator to be properly adjustedlon the base and at the Sametime have its tliimble seat on and clamp the base in position;

2. The combination with an insulator support comprisin a hollow base mounted upon a cross-arm, a lolt for securing said base in position on the cross-arm screw-threaded at both ends, one end projecting beneath the cross-arm to receive a nut and the other end projecting above the base,l of an insulator com risin a conductor-carr in@r member formed of insulating material and having a wire receiving groove in the top thereof and an internally screwthreaded thimble serewing on the projecting end of the bolt engaging the top of the base and clamping the base onto the cross-arm, and laterally projecting means on the bolt below the top of the base and independent of the insulator for prel venting the bolt from dropping' through the arm when the base and bolt alone are assembled on the cross-arm, said means permitting a free vertical movement of the bolt with respect to the base to allow the groove in the top of the insulator to be properly alined and at the same time have the thimble of the insulator seat on and clamp the base in position.

3. The combination with an insulator support comprising a hollowbase mounted upon a. cross-arm7 a bolt for securing said base in position on the cross-arm screw-threaded at both ends, one end projecting beneath the cross-arm to receive a nut and the other end projectingl abovefthe base, of an insulator comprising a conductor-carrying member and an internally screwthreaded thimblc screwing on the projecting'end of the bolt engaging on the top of thebase and clamping the base onto the cross-arm, and a collar on said bolt arranged to engage a shoulder formed in said base below the top thereof to prevent the bolt from dropping through 'the base and arm after the bolt and base have been assembled on the cross-arm, said collar permitting a free vertical movement of thc bolt with respect to the base to allow the insulator to be properly adjusted on the base and at the same time have 'its thinible seat on and clamp the base in position.v

. In witness whereof, we have hereunto subscribed our names in the presence of two wit;- nesses.

JULUS L. HECHT. JGTHAl'v C. GAPEN.

Witnesses:

J. W. PORTER, A. V. HORN.

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