Communications: electrical – Digital comparator systems
Patent
1987-10-26
1989-01-31
Orsino, Joseph A.
Communications: electrical
Digital comparator systems
340 81R, 40612, 40590, 116 63P, E01F 900
Patent
active
048019186
ABSTRACT:
This invention relates to an arrow board. The arrow board comprises a cabinet having an operative face and a rhomboidal array of lamps arranged in the operative face. A wing board is hingedly attached to the operative face at its transverse medial line. The wing board defines a mask for the lamps and is movable from a first position, in which it extends across the operative face on one side of the board to define an arrow configuration of exposed lamps pointing in one direction, to a second position on the other side of the face in which it defines an arrow configuration of exposed lamps pointing in the other direction.
REFERENCES:
patent: 1199545 (1916-09-01), Hammond
patent: 1976213 (1934-10-01), Briechle
patent: 1992827 (1935-02-01), Kunneke
patent: 2081790 (1937-05-01), Braun
patent: 2141188 (1938-12-01), Arbuckle
patent: 2186000 (1940-01-01), Arbuckle
patent: 2214275 (1940-09-01), Hart
patent: 3553645 (1971-01-01), Finkel
patent: 3622980 (1971-11-01), Elledge
patent: 3883846 (1975-05-01), Bruner
patent: 4087785 (1978-05-01), Dodich
patent: 4094083 (1978-06-01), Fund
patent: 4152854 (1979-05-01), Berry
patent: 4163332 (1979-08-01), Salam
patent: 4318238 (1982-03-01), Macarle, Jr.
patent: 4593265 (1986-06-01), McKenney
patent: 4731945 (1988-03-01), Howard
Buckingham Danny W.
De Bruyn Svend R.
Jackson Jill D.
Orsino Joseph A.
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