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:
May. 17, 1977
Filed:
Oct. 06, 1975
Applicant:
Inventors:
Aaron A Galvin, Lexington, MA (US);
James B Edson, Concord, MA (US);
Assignee:
American District Telegraph Company, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340214 ; 3402 / ;
Abstract
For use in a multiple zone intrusion alarm system having a central control unit and a plurality of remote transceivers or other sensors, apparatus for testing the operability of the transceivers wherein the control unit includes means for deactivating all of the transceivers, and each transceiver includes means by which that transceiver can be reactivated by connection of a test circuit thereto. The test circuit is operative to measure background noise levels and alarm levels for the associated area being tested.