Title: Elevator control

Abstract: An apparatus for selecting a floor, and slowing down and leveling an elevator is described. At least one wire or rod extends vertically along the elevator shaft. The wire or rod is of a nonmagnetic material and has magnetic coatings thereon along selected segments of its length. A number of magnetic sensors are mounted to the elevator. A circuit responsive to the sensor outputs produces control signals dependent on the length of each segment of magnetic coating.

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Inventors: Richmon, Sidney (Richmond, VA, US)

Application Number: 856957
Filing Date: 1977-12-02
Publication_date: 1980-05-20
Assignee:
Primary Class(es): 187/284 187/394
Other Classes:
US Patent Ref:

2598214	May, 1952	Borden	187/29.
2792080	May, 1957	Dunlop	187/29.
2840188	Jun, 1958	Savage	187/29.
2938603	May, 1960	Loughridge	187/29.
3223200	Dec, 1965	Lejeune	187/29.
3407905	Oct, 1968	Gingrich	187/29.
3765510	Oct, 1973	Richmon	187/29.
4007811	Feb, 1977	Ozawa	187/29.

Other Refs:
Primary Examiner: Truhe, J. V.
Assistant Examiner: Duncanson, Jr., W. E.
Attorney: Griffin, Branigan & Butler