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:
Sep. 13, 1977
Filed:
Apr. 17, 1975
Applicant:
Inventors:
Eric A Kolm, Brookline, MA (US);
Robert R Trottier, Woonsocket, RI (US);
Assignee:
Signal Science Systems, Inc., Framingham, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01H / ; H01H / ;
U.S. Cl.
CPC ...
334-8 ; 250206 ; 250209 ; 250210 ;
Abstract
A remote control unit for an electrical appliance includes a pair of photocells and one or more threshold devices connected to sense differential illumination of the photocells. The threshold devices, in turn, emit signals that initiate operation of a control device connected to the appliance. The threshold devices are preferably gaseous discharge lamps whose light outputs are sensed by radiation-response switching circuitry.