Device for indicating a symbol representing the location of a pa

Details Device for indicating a symbol representing the location of a pa Device for indicating a symbol representing the location of a pa

1979-06-08

1980-09-30

Yasich, Daniel M.

Signals and indicators

Indicators

By location

40495, G09F 1104

Patent

active

042248949

ABSTRACT:
The device comprises a casing in the form of a circular ring having two conically converging outer surfaces provided with symbols and two identical circular discs inserted in the casing and provided each with an arrow. The discs which lie in parallel planes are held together by a bolt and are rotatable in the casing independently of each other in both directions. On the inner side of the casing there are provided recesses, the number of which corresponds to the number of the symbols. In each disc there are provided locking means, which reenter in one of the recesses for locking the disc during its rotational movement.

REFERENCES:
patent: 2284903 (1942-06-01), Illmer
patent: 2537598 (1951-01-01), Mason
patent: 2596374 (1952-05-01), Crapster
patent: 3553867 (1971-01-01), Von Behren
patent: 3604134 (1971-09-01), Clark
patent: 3852900 (1974-12-01), Svec

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