Shaft position detector and control device

Details Shaft position detector and control device Shaft position detector and control device

1989-08-24

1990-04-03

MacDonald, Allen

Boots, shoes, and leggings

364183, 318601, 25112901, 25112905, G05B 1100, G01R 3300

Patent

active

049145665

ABSTRACT:
Control and positioning devices wherein a digital position signal is generated indicative of the position of a moveable element between limits and is supplied to a comparator device and where a digital signal is also provided to the comparator device indicative of a selected position of the element where the comparator device compares the two digital signals and operates actuator device to move the element in a corrective direction toward the selected position where movement terminates upon arrival of the element at the selected position.

REFERENCES:
patent: 3155955 (1964-11-01), Davidson et al.
patent: 3584203 (1971-06-01), Patzelt et al.
patent: 3622766 (1971-11-01), David et al.
patent: 3752969 (1973-08-01), Kiffmeyer et al.
patent: 3942718 (1976-04-01), Palmieri
patent: 3976963 (1976-08-01), Kubler
patent: 4068163 (1978-01-01), Foxworthy
patent: 4312033 (1982-01-01), Sweeney et al.
patent: 4356554 (1982-10-01), Susnjara et al.
patent: 4417312 (1983-11-01), Cronin et al.

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