Card – picture – or sign exhibiting – Changing exhibitor – Single reel and web
Patent
1985-02-26
1989-01-03
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Single reel and web
40592, 40593, 40643, G09F 1118
Patent
active
047947152
ABSTRACT:
A roller-type map or shade holder is provided which is operated by an electric motor. In one embodiment, a simple drive clutch arrangement decouples the motor drive shaft from the map roller when the map is fully unwound or rewound.
REFERENCES:
patent: 326013 (1885-09-01), Brownlee
patent: 430902 (1890-06-01), Turner
patent: 1102921 (1914-07-01), Hodges
patent: 2729908 (1956-01-01), Miller
patent: 3003270 (1961-10-01), Palm
patent: 3293785 (1966-12-01), Krei
patent: 4525946 (1985-07-01), Olson
Chaikin Douglas A.
Contreras Wenceslao J.
Mancene Gene
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