Tape drive sensor

Details Tape drive sensor Tape drive sensor

1976-11-01

1979-01-16

Dahl, Lawrence J.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

242 57, 242 7552, G01D 534

Patent

active

041350847

ABSTRACT:
A device for sensing the torque of a tape driving shaft transferred to a driven shaft, and indicating absence of tape to be driven. The shafts are resiliently coupled, and apertured opaque discs are coupled to the respective shafts. Radiation emitting and sensing elements on a movable bifurcated arm are held by the tape in alignment with the disc apertures to sense torque, and are moved clear of the discs if no tape is present.

REFERENCES:
patent: 1919607 (1933-07-01), Thompson
patent: 2147711 (1939-02-01), Martin
patent: 3263038 (1966-07-01), Walker
patent: 3497158 (1970-02-01), Calaway
patent: 3938890 (1976-02-01), Flavell

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