Position signaller which compensates for backlash in its gear tr

Details Position signaller which compensates for backlash in its gear tr Position signaller which compensates for backlash in its gear tr

1987-02-11

1987-11-17

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

74409, G01D 534

Patent

active

047076011

ABSTRACT:
A signaller part (13) is coupled drivewise with a transmitting element (2), on the one hand by a force transmitting connection and on the other hand in a form-locked and slip-free manner via a transmission (5, 6, 8, 9, 10) which exhibits backlash. The transmission element (2) is compulsorily coupled with a machine part (4) the position of which is to be adjusted. As a result of its transmission ratio the transmission (5, 6, 8, 9, 10) only permits a reduced speed of the signaller part (13) relative to the transmitting element (2). When, after reaching the selected position, the machine part (4) attempts to move away from this position in a direction of movement which opposes the preceding adjustment movement, then the signaller part (13) is initially moved by and with the transmitting element at unreduced speed as a result of the backlash of the transmission, i.e. the departure from the selected position is indicated with increased accuracy.

REFERENCES:
patent: 4123653 (1978-10-01), Bovio
patent: 4363026 (1982-12-01), Salmon

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