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:
Jan. 29, 1991
Filed:
Jan. 09, 1989
Elizabeth L Ratner, Lowell, MA (US);
David H Fox, Beverly, MA (US);
GTE Products Corporation, Danvers, MA (US);
Abstract
A lamp assembly includes a sealed lamp envelope enclosing a filament, a lamp base affixed to the lamp envelope and including a connector, and an automatic light control circuit located in the lamp base and electrically connected between the connector and the filament. The light control circuit includes a photosensor for controlling the power delivered to the filament in response to a sensed ambient light level. Preferably, the lamp base includes a cup-shaped portion affixed to the connector, and the light control circuit is mounted in the cup-shaped portion on a circuit board. The photosensor is mounted in a hole in a sidewall of the cup-shaped portion. The lamp assembly can be installed and operated in a conventional lamp socket.