Elevator system

Details Elevator system Elevator system

1975-05-05

1978-09-05

Schaefer, Robert K.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 118

Patent

active

041112849

ABSTRACT:
An elevator system with an asynchronous-synchronous interface between the system processor and each car controller. Each interface includes a serially accessed memory which intermittently receives command words from the system processor. The serially accessed memory repetitively reads out the commands to the car controller, and updates the commands in response to a new data word without interrupting the flow of data to the car controller. Each interface utilizes internal logic and timing for controlling its serially accessed memory, thus relaxing the memory capacity and processing speed requirements of the system processor.

REFERENCES:
patent: 3741347 (1973-06-01), Kirsch
patent: 3828892 (1974-08-01), Winkler et al.
patent: 3851734 (1974-12-01), Sackin
patent: 3851735 (1974-12-01), Winkler et al.
patent: 3903499 (1975-09-01), Oliver

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