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. 29, 1998
Filed:
May. 19, 1997
David W Knoble, Tupelo, MS (US);
Khosrow Jamasbi, Belden, MS (US);
Robert D Munson, Tupelo, MS (US);
James V Olson, Indianapolis, IN (US);
Thomas Lighting, Tupelo, MS (US);
Abstract
A dimming control for a high intensity lighting system uses a single additional control wire for control of the dimming function. The lighting system operates on multi-phase power. A transmitter for transmitting a control signal over the single control wire is connected between two of the phases of the multi-phase power supply, or between one phase and neutral. The transmitter, upon the occurrence of a predetermined condition, transmits a control signal to the single control wire. The control signal is a rectified portion of the power supply. The predetermined condition is motion as sensed by a motion sensor, operation of a timer, or operation of a manual switch. A receiver connected to the control line receives the control signal and switches the light to a low light output mode. The is accomplished by changing the capacitance of the ballast circuit for the light. Each lamp of the lighting system has a receiver connected to the single control wire.