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:
Dec. 12, 2000
Filed:
Dec. 10, 1998
Heinrich Wolfgang Steinel, D-33442 Herzebrock-Clarholz, DE;
Other;
Abstract
An automatic switching device for flourescent light has a light sensing element that reacts to ambient light and a switching unit designed to react to an output signal from the light sensing element and to activate or deactivate the flourescent light. The switching unit has a reference threshold generator. The flourescent light is activated or deactivated depending on whether the output signal from the light sensing element exceeds or falls below a threshold generated by the reference threshold generator and the threshold level depends on the luminosity sensed by the light sensing element. The switching unit further includes a delay designed for preventing signal processing by the switching unit for a present period of time upon switching on of the flourescent light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile