Apparatus for determining a reference position of a moving membe

Details Apparatus for determining a reference position of a moving membe Apparatus for determining a reference position of a moving membe

1981-10-07

1984-08-28

Brigance, Gerald L.

Communications: electrical

Continuously variable indicating

Via radiant energy beam

250231SE, 34087028, G08C 1916

Patent

active

044686668

ABSTRACT:
The apparatus comprises a first marking element rigid with a disk rotationally driven in synchronism with the translation movement of the member and a detector which delivers an electrical signal upon the passage of the marking. The disk makes many complete rotations for the complete stroke of the member. A second marking element is rigid with the member and a second detecting device delivers an electrical signal upon the passage of the marking in front of the detector. The logic circuit C processes these two electrical signals so as to produce a signal 10 which gives the instant when the moving member passes through the reference position.

REFERENCES:
patent: 3749925 (1973-07-01), Hertrich
patent: 3818224 (1974-06-01), Schmidt
patent: 3922654 (1975-11-01), Hobson, Jr.
patent: 4109389 (1978-08-01), Balcom et al.
patent: 4263506 (1981-04-01), Epstein

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