Pulse-producing transducer

Details Pulse-producing transducer Pulse-producing transducer

1981-09-16

1984-05-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250233, G01D 538

Patent

active

044463677

ABSTRACT:
A linear or annular optical grating cooperates with a detector unit having two detectors on the front face of a carrier member of rotational symmetry and being either directly rotatable through a rear-face screwdriver slot, or via a cam-operated lever, the cam being rotatable by screwdriver action. The two detectors are aligned along a diameter line of the carrier member and will produce two phase-shifted pulse trains upon relative movement between the detection unit and the grating. The preferred field of application is matrix printers, the grating defining print position.

REFERENCES:
patent: 3902063 (1975-08-01), Oelsch et al.
patent: 4247769 (1981-01-01), Warner

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