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. 20, 1984
Filed:
May. 17, 1982
Applicant:
Inventors:
William G Kahl, Jr, Brookfield, CT (US);
John Baldwin, Danbury, CT (US);
Assignee:
Cerberus AG, , CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; G01J / ;
U.S. Cl.
CPC ...
250342 ; 250353 ;
Abstract
A passive infrared intrustion detector is provided with a lens which has a plurality of first lens segments, each for focusing infrared radiation from various beams of sensitivity onto an infrared detecting element. Associated with each of the first lens segments is a second lens segment, with a displaced lens center, which serves to focus light originating within the detector device into a radiated beam, which corresponds in space to the region of sensitivity of the infrared beams.