Indicator using changeable path through transparent material

Details Indicator using changeable path through transparent material Indicator using changeable path through transparent material

1976-08-30

1978-08-08

Swisher, S. Clement

Signals and indicators

Bells

Gong type

116DIG28, 1161244, 200313, 200314, 200315, 200316, H01H 916

Patent

active

041049810

ABSTRACT:
An indicator comprises first means adapted for emitting a ray of light; and second means having an indicating surface for receiving the ray of light to permit the ray of light to illuminate the indicating surface. The first and second means are movable relative to each other to vary intensity of illumination of the indicating surface.

REFERENCES:
patent: 1823319 (1931-09-01), Dickinson
patent: 1990639 (1935-02-01), Dewhurst
patent: 2109790 (1938-03-01), Batcheller
patent: 2285374 (1942-06-01), Dohsmann
patent: 3144643 (1964-08-01), Andersson
patent: 3518386 (1970-06-01), Guberman
patent: 3632938 (1972-01-01), Stessel
patent: 3645227 (1972-02-01), Lahmer
patent: 4023003 (1977-05-01), Arthur et al.

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