Electrical brush sensor apparatus useful for analog-to-digital c

Details Electrical brush sensor apparatus useful for analog-to-digital c Electrical brush sensor apparatus useful for analog-to-digital c

1974-09-13

1976-12-21

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

307223R, 307247A, 310247, H01H 1900, H03K 1756, H01R 3900, H02K 1300

Patent

active

039990222

ABSTRACT:
An analog-to-digital converter or encoder utilizes a combination of a standard photoelectric encoder and improved slow-friction long-lasting brush-type encoder which together with the necessary code conversion circuitry will produce an absolute unambiguous decimal digital readout and a visual display of the readout all contained in a single compact housing which can be mounted in direct association to the object being measured. The encoder circuit also has an internal clutch arrangement whereby the encoder systems can be selectively disconnected from the input to allow the encoder to remain at zero or some other reference point while the relative positions of the encoder and the object whose position is being measured are changed. The unambiguous output is generated by sensing the position of the first order, or least significant readout digit and utilizing the position to selectively control energization of a preselected one of a pair of sensors associated with the next higher order digit both in the same encoder system and between the systems.

REFERENCES:
patent: 2008053 (1935-07-01), Whiteside
patent: 2264998 (1941-12-01), Miner, Jr.
patent: 2675448 (1954-04-01), Knudson
patent: 2948795 (1960-08-01), Brinster et al.
patent: 3043922 (1962-07-01), Laviana et al.
patent: 3146322 (1964-08-01), Farrell
patent: 3437766 (1969-04-01), Ahrens
patent: 3445705 (1969-05-01), Fuller et al.
patent: 3505549 (1970-04-01), Wacek

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