The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 1979
Filed:
Apr. 17, 1978
Applicant:
Inventors:
Toshiyuki Kawaguchi, Inuyama, JP;
Tomio Hayashi, Gifu, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
174212 ; 174211 ;
Abstract
A rod-type insulator is provided with the optimum withstand voltage characteristics under a contaminated condition by selecting the ratio of the leakage distance per shed to the shed pitch to be between 3.8 and 5.0 and also selecting 4.5.ltoreq.l/p.ltoreq.6.0, where p is the distance between the adjoining sheds, i.e., the distance between a given point on the lower surface of one shed and another given point on the upper surface of the other opposing shed, and l is the leakage distance between the two points.