WILLIAM K GIAMAS
Radio and Television Technicians in Cambridge, MA
License number
Massachusetts 8758
Expiration Date
Dec 31, 2012
Type
Master Technician
Address
Address
Cambridge, MA 02140
Professional information
Keyhole Lighting Fixture
US Patent:
6305814, Oct 23, 2001
Filed:
Nov 23, 1999
Appl. No.:
9/448561
Inventors:
William Giamas - Cambridge MA
International Classification:
E05B 1508
US Classification:
362100
Abstract:
An improved apparatus for illuminating keyholes comprised of an annular top housing made of rigid material, having recessed and through holes, and a recessed oval pocket having within two through holes. Top housing (12) is slidably over an annular bottom housing (30) made of the same material as top housing (12), also having recessed and through holes. A printed circuit board (40) having transistor (52), resistor (54), and male power connector (64), mounted and soldered directly on its surface, is housed and affixed within top housing (12), by screw (46), plastic spacer (44), and nut (48). A photoresistor (56) is housed within a pocket (20) and located on top housing (12), its two leads are inserted through two holes (22), located within pocket (20), and soldered directly to printed circuit board (40). A light emitting diode (58), positioned a predetermined distance below a keyhole, and having its two leads soldered to printed circuit board (40), is also housed within top housing (12). Battery (60), housed within top housing (12), provides power to printed circuit board (40) by plugging a female connector (66) into a male connector (64).