Card – picture – or sign exhibiting – Illuminated sign – Edge illuminated
Patent
1976-12-06
1978-08-15
Pitrelli, John F.
Card, picture, or sign exhibiting
Illuminated sign
Edge illuminated
40452, 340380, 350 9630, G09F 1318
Patent
active
041062310
ABSTRACT:
The following specification discloses a low level lighting indicator readout or display of the type having a lighting source such as incandescent lamps that have been placed in a heat sink. The incandescent bulbs or lamps are connected to a logic network, so that one or a plurality of bulbs can be lit by the logic network in order to cause a particular display to be registered. The display is registered by means of the lamps passing light through a series of conductive light tubes such as fiber optic members that emanate therefrom to form a series of optical readouts in the form of dots, or segments, such as bar displays. The termination of the light pipes provide a matrix in the form of a dot pattern that can be driven to create various displays in the form of alpha numeric representations or other symbols. A specialized diffuser comprising this invention having miniaturized particles or spherical glass beads on the surface thereof at the interface between the lamps and the light pipes, allows for a transmission of light therethrough at low level voltages on the lamps.
REFERENCES:
patent: 2843002 (1958-07-01), Allison
patent: 3210876 (1965-10-01), Towne
patent: 3545114 (1970-08-01), Hurst et al.
patent: 3562746 (1971-02-01), Aron
patent: 3631478 (1971-12-01), McNaney
patent: 3739512 (1973-06-01), Ruppert
patent: 3768188 (1973-10-01), Kurtenbach et al.
Bethel George F.
Bethel Patience K.
Master Specialties Company
Pitrelli John F.
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