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:
Jan. 02, 1979
Filed:
Jan. 14, 1977
Manfred W Wilms, Goleta, CA (US);
Joslyn Mfg. and Supply Co., Chicago, IL (US);
Abstract
A spark gap protector includes a gas tube spark gap device received in a supporting base. A failsafe device for permanently shorting the spark gap protector to ground after an extended discharge includes a spring biased cage and a solder pellet. An extended surge current fuses the solder pellet resulting in movement of the shorting cage to a failsafe, shorted condition. The cage normally grasps a conducting ring spaced from a shorting contact member by a thin insulating spacer defining an auxiliary gap thereacross. In case the spark gap device vents so as to become substantially inoperative, and the cage does not operate to short the device, the auxiliary gap provided backup protection at a breakdown voltage somewhat greater than ordinarily supplied by the gas tube spark gap device.