Machine element or mechanism – Mechanical movements – Rotary to intermittent unidirectional motion
Patent
1992-02-19
1992-11-10
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Rotary to intermittent unidirectional motion
74435, 74665GB, 40505, F16H 2708, G09F 1102
Patent
active
051614219
ABSTRACT:
The present invention relates to a driving device for driving or operating elongate display members at signs for consecutive, repeated presentation of series of images, whereby said elongate display members (2) are driven through pairs of gear wheels (15, 16) having conical teeth and whereby a driving gear wheel (15) in each pair of gear wheels is provided on a drive shaft (6) and a driven gear (16) wheel in each pair is operatively connected with the elongate display member (2) to be driven. In this driving device, for being able to rotate the driving unit forming part thereof continuously in one and same direction of rotation and to ensure that the elongate display members can not come "out of phase" neither during rotation nor when they stand still in their display positions, the driving gear wheel (15) comprises a gear sector (20) which occupies only a part of the periphery of said driving gear wheel (15) such that said driving gear wheel (15), is in driving engagement with the driven gear wheel (16) only during a part of a revolution of said driving gear wheel (15) and the drive shaft (6) has a lock (21) which is provided to cooperate with said driven gear wheel (16) or with members non-rotatably connected therewith in such a manner that said driven gear wheel (16) is blocked against rotation during that part of the revolution of said driving gear wheel (15) when the gear sector (20) of said driving gear wheel (15) is out of driving engagement with the teeth (18) of said driven gear wheel (16).
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Braun Leslie A.
Krolikowski Julie
Prisma Skyltreklam AB
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