Mine safety inspection indicator

Details Mine safety inspection indicator Mine safety inspection indicator

1978-08-15

1979-05-22

Yasich, Daniel M.

Signals and indicators

Indicators

Operator movable

40109, 101354, 116309, 116321, 346 78, B41F 3114, G07C 300, G09F 900

Patent

active

041553268

ABSTRACT:
A mine safety inspection indicator including a plurality of rotatable wheels having indicia printed on one side thereof and attached to a panel having windows therein so that the indicia is selectively visible through the windows, and further including slideable indicators whose position is correlated with indicia for giving further information, the wheels and slideable indicators including printing members cooperable with recording paper and a pressure member so as to provide a permanent record of a mine safety inspection; the device also includes a slideable warning panel which may be moved to a position out of view or moved to a visible position for giving a warning of a dangerous condition in a mine.

REFERENCES:
patent: 1711981 (1929-05-01), Andres et al.
patent: 2868293 (1959-01-01), Kearse
patent: 3431845 (1969-03-01), Hooper
patent: 3436015 (1969-04-01), Bradford
patent: 3599224 (1971-08-01), Hahn
patent: 3709144 (1973-01-01), Sims
patent: 4058079 (1977-11-01), Taylor et al.

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