Richard E Hiltenbrand from 2652 S Holland St, Denver, CO 80227, age 73, Phone: 303 987-3189

Smoke Detector With Test Apparatus
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US Patent:

43743293, Feb 15, 1983
Filed:

Apr 24, 1981
Appl. No.:

6/257095
Inventors:

George A. Schoenfelder - Downers Grove IL
Gerald D. Rork - Sleepy Hollow IL
Richard E. Hiltenbrand - Naperville IL
Assignee:

Pittway Corporation - Aurora IL
International Classification:

G08B 2900
US Classification:

250574
Abstract:

A photoelectric smoke detector includes a light source and a light responsive cell and a smoke chamber therebetween all located within a generally cylindrical inner housing which is in turn concentrically located within a generally cylindrical outer housing. The inside surface of the outer housing is reflective, but the inner housing normally prevents light emitted by the light source into the smoke chamber from striking the outer housing. The inner housing contains one or more windows and is rotatable to move the windows to a position wherein light from the source can pass therethrough to the reflective surface of the outer housing and be reflected thereby back to the light responsive cell. The amount of light striking the reflective surface can be continuously adjusted between a normal condition when no light is reflected and a full test condition when a maximum quantity of light is reflected to the light responsive cell. Instead of having windows therein, the inner housing may alternatively have reflective portions thereon.

Richard E Hiltenbrand