Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1977-04-18
1978-10-10
Jackmon, Edith S.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
58 50R, 340324M, 362 23, G04B 1930, G08B 2300, G04B 1106
Patent
active
041189248
ABSTRACT:
An improved form of illuminated display, particularly for electric wristwatches and the like. A light-reflecting dial face is provided, and a plurality of prisms formed of light-transmitting plastic arranged thereon. A miniature incandescent lamp is attached to the underside of a transparent cover or crystal for directing illumination upon the reflecting surface. An angled surface of the prism directs the light reflected thereon from the reflecting surface upwardly through indicia formed at the top of each prism. In a preferred embodiment, the indicia are formed by raised numerals, the radially inward halves thereof being inclined with respect to the reflecting surface. Watch hands are formed of translucent plastic, and have inclined lower surfaces with reflecting material thereon to allow the hands to be illuminated by the miniature lamp.
REFERENCES:
patent: 2172765 (1939-09-01), Kollsman
patent: 2173316 (1939-09-01), Sproule
patent: 2536557 (1951-01-01), Levesque
patent: 2988631 (1961-06-01), Hershey et al.
patent: 3005907 (1961-10-01), Dupree
patent: 3590773 (1971-07-01), Ruppert
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