Communications: electrical – Audible indication – Ultrasonic pest control
Patent
1977-01-14
1978-10-17
Pitts, Harold I.
Communications: electrical
Audible indication
Ultrasonic pest control
340381, 361414, G02B 516, G08B 500
Patent
active
041212061
ABSTRACT:
A light-emitting message character display device suitable for use in high ambient light levels such as are encountered in aircraft cockpits at high altitudes utilizes optic fiber light guides for converting one or more primary light sources into corresponding illuminated message characters emanating from the output ends of the light guides. The device includes (1) a light guide support member having a light receiving surface with a plurality of openings and a visual message character display surface with corresponding openings arranged to provide arrays of a plurality of bar segments of predetermined visual message characters; and (2) a plurality of groups of light guiding optic fibers disposed between and supported by the light receiving and message character display surfaces of the light guide support member. The light admitting ends of each group of optic fibers are bundled together in closest packing configuration into one opening of the light receiving surface and the light emitting output ends of each group of optic fibers are bundled together in closest packing configuration into one opening of the visual message character display surface and define and occupy essentially the entire area of a visual message character bar segment. Sub-miniature incandescent lamps which can be used as the primary light sources for the message character display device are provided with unequal-length terminal pins to permit each pin to be inserted into and contacted with separate printed circuit boards utilizing conventional lead sockets.
REFERENCES:
patent: 3522474 (1970-08-01), Piel
patent: 3600058 (1971-08-01), Kato
patent: 3803597 (1974-04-01), Kirner
patent: 3819442 (1974-06-01), Brushenko
patent: 3875479 (1975-04-01), Jaggar
patent: 3887803 (1975-06-01), Savage
patent: 3916514 (1975-11-01), Salminen
patent: 3960629 (1976-06-01), Goldsworthy
Ackerman Bodnar Corporation
Pitts Harold I.
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