Smoke detector

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Description

FIG. 1 is a left side elevational view of a smoke detector, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a side elevational view taken 90 degrees from FIG. 1;

FIG. 5 is a reduced bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D246635 December 13, 1977 Boldt et al.
D249481 September 19, 1978 Conforte et al.
4099178 July 4, 1978 Ranney et al.
Other references
  • Honeywell, 9/1978, front of article, Smoke Detector in middle right side. Hareware Age, 7/1978, p. 133, Smoke alarm, Model #SM870, located in lower right corner.
Patent History
Patent number: D279769
Type: Grant
Filed: Aug 19, 1983
Date of Patent: Jul 23, 1985
Assignee: American District Telegraph Company (Jersey City, NJ)
Inventors: Hugh P. Thornton, Jr. (Acton, MA), Robert B. Powers (Norwell, MA)
Primary Examiner: B. J. Bullock
Assistant Examiner: Suzanne N. Gitlin
Attorney: James H. Grover
Application Number: 6/524,589
Classifications
Current U.S. Class: D10/106