Infrared intrusion detector

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Description

FIG. 1 is a perspective view of an infrared intrusion detector showing our new design;

FIG. 2 is a side view;

FIG. 3 is a front view; and

FIG. 4 is a bottom view.

Referenced Cited
U.S. Patent Documents
3486026 December 1969 Bez
3653021 March 1972 Litman et al.
Other references
  • Mountain West Alarm Supply Co., Catalog A-78, .COPYRGT.1977, p. 21, Infrared Burglar Detector.
Patent History
Patent number: D262869
Type: Grant
Filed: Apr 26, 1979
Date of Patent: Feb 2, 1982
Assignee: American District Telegraph Company (New York, NY)
Inventors: John K. Guscott (Lynnfield, MA), Gianfranco D. Zaccai (Newton, MA)
Primary Examiner: Susan J. Lucas
Law Firm: Weingarten, Schurgin & Gagnebin
Application Number: 6/33,756
Classifications
Current U.S. Class: D10/106
International Classification: D1005;