Patent record; Patent # 657,574

[Trade Journal]

Publication: Western Electrician

Chicago, IL, United States
vol. 27, no. 12, p. 193, col. 2

ILLUSTRATED ELECTRICAL PATENT RECORD.

Issued September 11, 1900.

NO. 657,574

No. 657,574

657,574. High-voltage Insulator. Alf Sinding-Larsen, Frederiksvaern, Norway. Application filed December 11, 1899.

Combined with a main-line conductor carrying alternating or pulsating current and its insulating supports are a local circuit at each support and means for heating the supports included in the local circuit. (see cut.)

Keywords:	Insulator
Researcher notes:
Supplemental information:	Patent: 657,574
Researcher:	Bob Stahr
Date completed:	February 18, 2009 by: Bob Stahr;