Zero reference rotation sense indicator

Details Zero reference rotation sense indicator Zero reference rotation sense indicator

1993-12-21

1995-10-03

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Control by direction of rotation of shaft or spindle

H01H 316

Patent

active

054553970

ABSTRACT:
In a system which includes a driven shaft that has limited angular rotation capabilities from a start position clockwise and counterclockwise through a common overlapping angular region, a device for enabling the determination of which desired direction the shaft should be rotated from the region in order to return to the start position including a first member connected for motion with the shaft rotation and a second member mounted for independent motion when moved by the first member in a first direction, the second member being held in the start position with motion of the first member in a second direction, and a sensor to sense the presence of the second member in the start position as an indication of the desired direction.

REFERENCES:
patent: 3192335 (1965-06-01), Todd et al.
patent: 3233053 (1966-02-01), Parks
patent: 3322912 (1967-05-01), Kuchta
patent: 4112265 (1978-09-01), Crepeau et al.
patent: 4247744 (1981-01-01), Birkle
patent: 4406934 (1983-09-01), Elszasz
patent: 4499409 (1985-02-01), Bauer
patent: 4762385 (1987-06-01), Prindle
patent: 4814743 (1989-03-01), Hanaki
patent: 4939320 (1990-07-01), Graulty

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