US1205971A - Electric insulator. - Google Patents

Description

C. BUSCHEUI, ELECTRIC HJSULATOR. APPLICATlON HLED APR-.10, 1915.

laiented Nov, E28, 1916.

perdafi w s M Attorney.

C; B'USCHETTI. ELECTRIC INSULATOR. APPLIGATION FILED APR-10.1915. 1 305,97 1. Patented N0v.'28, 1916.

2 SHEETS-SHEET 2.

Attorney UNITED srArns ra rnnr OFFICE.

OLAUDIO BUSCHETTI, OF MILAN, ITALY.

ELECTRIC INSULATOR.

Application filed April 10, 1915.

To all whom it may concern:

Be it known that I, CLAUDIo Buscrrn'r'rr, a' subject of the King of Italy, residing at 115 S. Cristoforo, Milan, in the Kingdom of Italy, have invented certain new and useful Improvements in Electric Insulators, of

which the following is a specification.

In order to connect lnsulators with their supporting rods, metallic members such as screw-threaded sleeves, caps or pins were hitherto used and secured to the insulator by screwing or more often by cement, or putty. In any case these members were manufactured independently and separately they are liabl to be broken up, by shocks and the constant oscillation of the electric 'sulating lines, and secondly they completely and rigidly fill the cavity of the insulator within which the metallic portion is fixed so that when the temperature of the insulator becomes higher than it was at the time the ocmenting tool: place it is liable to be fractured owing to the pressure exerted from within by .the cement due to the expansion of the heated metal. This is caused by the difierence in the thermal co-efiicients of expansion of these two materials and the inmaterial. In addition thereto, chemical reactions take place between the putty'or cement or metal thereby producing an increase in the volume and thus cause the bursting of the insulator without the assistance of heat. The present invention eliminates these drawbacks as the metal which is to constitute the connecting member of the insulator, is fixed directly on the surface which. is to receive the same, without the use of cement, putty or any mechanical elements but merely by means of a gavanoplastic process. It is obvious that the galvanic deposit may connect the insulator with other metallic parts which have not been obtained electrolytically.

In the accompanying drawingsr Figure 1 illustrates, in section and elevation, one

Specification of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 20,563.

form of the connection effected in' accordance with the invention. Fig. 2 illustrates a modification in section.

a is the metallic sleeve formed with a screw-thread, which has been provided in the insulator (Z directly by electrolytic means; into this sleeve the pin or support of the in sulator may be introduced by screwing, irrespective of the fact whether the screwthread has been obtained during the electrogalvanic deposition or whether it has been formed subsequently. The screwed connection may be replaced by any other connection, for example mechanical, electrical, or by solder. F or instance, Fig. 2 illustrates another form which may be given to the electro-galvanic connection. (Z is the insulator and b is a metallic sleeve formed with a screw-thread screwed on to the galvanic deposit a which is partly or wholly covered thereby. The said sleeve may be connected with any pin or support having an internal or external screw-thread, or by any other mechanical means. The method above described may also be used for connecting insulators with one another.

What I claim and desire to secure by Letters Patent of the United States is 1. In combination, an electric insulator body, a recessed portion thereon, a. metallic 'freely within said recessed portion, means upon the projecting portion for attaching another sleeve thereto and a sleeve thereon adapted to be secured to a supporting member, substantially as set forth.

2. In combination, an electric insulator body, a recessed portion thereon, a metallic sleeve electrolytically deposited upon the inner portion of the recess and projecting freely within said recessed portion, a thread upon the projecting portion and a sleeve thereon adapted to be secured to a supporting member, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

CLAUDIO BUSCHETTI.

Witnesses AUGUSTA RronANY, LYLE RoBB.

Images