Position monitoring methods and apparatus

Details Position monitoring methods and apparatus Position monitoring methods and apparatus

1978-10-30

1981-03-24

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9322, 101110, 101 99, 235 92MP, B41J 144

Patent

active

042573246

ABSTRACT:
Methods and apparatus for ascertaining movement of a device from a first position to a second position couple a ratchet member and pawl combination to that movable device. Clicks indicative of the movement of the device are generated by effecting relative motion between the ratchet member and pawl in accordance with the movement of the device from the first to the second position. An ascertainment is then made from the generated clicks whether the movement of the device has in fact resulted in the desired movement from the first to the second position. The invention is of particular utility in the monitoring of character segments in printing devices, but is not limited to such an application.

REFERENCES:
patent: 2239460 (1941-04-01), Levy
patent: 2447588 (1948-08-01), McNairn
patent: 3118096 (1964-01-01), Gavreau et al.
patent: 3141403 (1964-07-01), Brown et al.
patent: 3896298 (1975-07-01), Haydon
patent: 3941686 (1976-03-01), Juvinall
patent: 4015521 (1977-04-01), Neff

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