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:
Jun. 10, 1997
Filed:
Mar. 21, 1995
Simo P Hakkarainen, Bethlehem, PA (US);
Russell L MacAdam, Allentown, PA (US);
Scott C Miller, Lehighton, PA (US);
Ian Rowbottom, Chalfont, PA (US);
Joel S Spira, Coopersburg, PA (US);
Lutron Electronics Co., Inc., Coopersburg, PA (US);
Abstract
A plurality of spaced ceiling mounted fixtures or other controllable electrical appliances have wide angle radiation detectors mounted within each fixture and wired internally of the fixture to a dimming circuit or to a ballast. The radiation detectors have sensitivity over a wide angle and are fixed over a small opening in the fixture. A narrow beam radiation transmitter selectively illuminates one of the radiation detectors without illuminating the others. The dimming circuits or ballasts within the fixtures can be further controlled by external dimmers, occupancy sensors, timeclocks, photosensors and other types of input devices.