Endless belt power transmission systems or components – Plural belts or plural output loads
Patent
1986-04-24
1987-06-30
Novosad, Stephen J.
Endless belt power transmission systems or components
Plural belts or plural output loads
474903, F16H 702
Patent
active
046767673
ABSTRACT:
The present invention relates to a driving device for signs having movable display screens which are multilateral and simultaneously rotatable by means of a driving unit for providing a number of continuously recurrent pictures corresponding to the number of sides on the display screens. Some of the display screens comprise two toothed pulleys of which one is adapted to cooperate with a toothed belt for transferring the driving power of the driving unit from a preceding display screen. The other pulley is adapted to cooperate with another toothed belt for transferring the driving power to a succeeding display screen. In order to facilitate setting of the display screens relative to each other by tightening and loosening of said toothed pulleys and by preventing toothed pulleys for the same display screen from rotating relative to each other during setting, both toothed pulleys for the display screen form part of a toothed twin-pulley as toothed portions which are fixedly connected to each other. The toothed twin-pulley further comprises a clamping device with clamping members positioned axially outside the toothed portions. At least one clamping means is provided on the clamping members and extends transversely to the axis of rotation of the toothed twin-pulley for tightening to clamp the clamping device on a shaft journal on the display screen.
REFERENCES:
patent: 2412114 (1946-12-01), Zonis
patent: 2933934 (1960-04-01), Haroldson
patent: 3299551 (1967-01-01), Llobet
patent: 3525271 (1970-08-01), Raines
patent: 3696685 (1972-10-01), Lampredi
Bui Thuy M.
Novosad Stephen J.
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