Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1976-03-26
1977-08-02
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250239, H01J 314
Patent
active
040398269
ABSTRACT:
A linear encoder especially adapted for location of the position of a magnetic read/write head of a disk memory system and having a modular light source and modular detector each easily replaceable and adjustable. The modularity of construction allows use of the encoder in other measuring systems of different mechanical configurations.
REFERENCES:
patent: 2788519 (1957-04-01), Caldwell
patent: 3806254 (1974-04-01), Ha et al.
patent: 3894232 (1975-07-01), Laspesa
Dynamics Research Corporation
Nelms David C.
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