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:
Apr. 12, 1994
Filed:
Jul. 21, 1993
Avi Wrobel, El Segundo, CA (US);
Other;
Abstract
An illuminating module with battery backup consisting of an array of light-emitting diodes is provided wherein the module combines the battery backup with the LED array in a self-contained light bulb-like unit which can be retrofitted into an existing incandescent light bulb socket. The batteries and the LED array are attached to a planar baseboard which further includes two base connectors. The base connectors are adapted to fit into existing light bulb sockets and are rotatably mounted on an edge of the baseboard to enable screwing them into light bulb sockets while the baseboard is kept stationary. The backup batteries are recharged from an external source of electrical current flowing through the base connectors. An automatic switching device switches the supply of electrical power for the LED array from the external source of electrical power to the backup batteries, when the flow of external electrical power is disrupted. A circuit causes the LED array to flash on and off to indicate interruption of external power, to prolong battery life, and to make the module more conspicuous in emergency conditions.