Control apparatus for elevator

Details Control apparatus for elevator Control apparatus for elevator

1986-04-14

1988-07-05

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187134, B66B 502

Patent

active

047548517

ABSTRACT:
A control apparatus for an elevator comprises a position detector responsive to cage movement, a non-volatile semiconductor memory for storing representation of cage position, and a microcomputer operated under program control for controlling the position detector to produce signals representing instantaneous cage positions and for continuously erasing and rewriting the contents of the non-volatile semiconductor memory based on the position detector signals. Thus, the stored contents can be reliably held even at the time of power failure, so that an expensive backup power source can be dispensed with.

REFERENCES:
patent: 4124103 (1978-11-01), Otto et al.
patent: 4317506 (1982-03-01), Quan et al.
patent: 4354171 (1982-10-01), Yoshida
patent: 4367811 (1983-01-01), Yoneda et al.
patent: 4368518 (1983-01-01), Terazono et al.

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