Floating head encoder

Details Floating head encoder Floating head encoder

1976-06-03

1978-02-21

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250233, G01D 534

Patent

active

040754782

ABSTRACT:
An optical encoder design is disclosed which maintains a constant fixed air gap between the commutator and light sensors. The encoder head is mounted on a partially compressed hollow bellows or other spring member biasing snubber posts adjacent to the light sensors against tracks on the commutator. The height of the snubber posts above the light sensors defines the air gap.

REFERENCES:
patent: 3770971 (1973-11-01), Somerset
patent: 3815125 (1974-06-01), May et al.

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