Signals and indicators – Navigation devices
Patent
1978-01-17
1979-09-04
Yasich, Daniel M.
Signals and indicators
Navigation devices
116204, 198349, 209583, 250223R, G02B 5124, G01N 2130
Patent
active
041666739
ABSTRACT:
Signal device for providing machine-readable indicia on an object, the device allowing the form of the indicia to be deliberately changed, but not accidentally. Reflective indicating means are slidable in a series of parallel tracks. Magnetic attraction between the track and the indicating means cause the indicating means to engage detents in the track and remain in selected locations.
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Blodgett Gerry A.
Blodgett Norman S.
Mekontrol, Inc.
Yasich Daniel M.
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