Photoelectric smoke detector
Thornton, Jr. , et al. July 30, 1
U.S. patent number D279,872 [Application Number 06/524,874] was granted by the patent office on 1985-07-30 for photoelectric smoke detector. This patent grant is currently assigned to American District Telegraph Company. Invention is credited to Robert B. Powers, Hugh P. Thornton, Jr..
| United States Patent | D279,872 |
| Thornton, Jr. , et al. | July 30, 1985 |
Photoelectric smoke detector
Claims
The ornamental design for a photoelectric smoke detector, as shown and described.
| Inventors: | Thornton, Jr.; Hugh P. (Acton, MA), Powers; Robert B. (Norwell, MA) |
|---|---|
| Assignee: | American District Telegraph
Company (Jersey City, NJ) |
| Appl. No.: | 06/524,874 |
| Filed: | August 22, 1983 |
| Current U.S. Class: | D10/106.5 |
| Field of Search: | ;D10/104,106,121 ;340/628,629,630,693 |
References Cited [Referenced By]
U.S. Patent Documents
| D215040 | August 1969 | Abe |
| D220662 | May 1971 | Buhrer |
| D276417 | November 1984 | Fenne |
| 1490273 | Jul 1967 | FR | |||
| 0563044 | Jun 1975 | CH | |||
| 0633122 | Nov 1982 | CH | |||
Other References
|
Pyrotronics, 7/1975, front page, Fire Detector, upper top of page.. |
Primary Examiner: Bullock; B. J.
Assistant Examiner: Gitlin; Suzanne N.
Attorney, Agent or Firm: Grover; James H.
Description
FIG. 1 is a left side elevational view of a photoelectric 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.
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