Shaft rotation sensor

Details Shaft rotation sensor Shaft rotation sensor

1980-04-28

1982-07-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

403345, G01D 536, G01P 336

Patent

active

043385176

ABSTRACT:
A modular incremental rotary shaft encoder is preassembled within its housing and then installed and aligned upon the shaft of which rotation is to be sensed. The encoder housing loosely confines a thin disc assembly having a shaft receiving aperture dimensioned to be a press fit upon the shaft. The encoder is installed simply by pressing the housing and the disc assembly therein upon the shaft and fixing the housing to the shaft support. The disc assembly plane of rotation and the disc to detector gap are fixed by inserting a slender elongated installation tool through the housing cover into engagement with the disc assembly and pressing and bending the disc assembly against a fixed stop while the shaft and disc assembly are rotated. A pointed tool is inserted through the housing against the disc assembly to hold the latter against rotation while the shaft is carefully rotated to provide for rotational indexing of the disc assembly.

REFERENCES:
patent: 3400275 (1968-09-01), Trump
patent: 3417650 (1968-12-01), Varrin
patent: 3894232 (1975-07-01), Lapesa
patent: 3900732 (1975-08-01), Costales
patent: 3995156 (1976-11-01), Angersbach et al.
patent: 4132890 (1979-01-01), Garcia et al.

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