Electropneumatic door control system

Details Electropneumatic door control system Electropneumatic door control system

1983-02-15

1989-05-02

Chin, Gary

Boots, shoes, and leggings

187103, G06F 1520

Patent

active

048274151

ABSTRACT:
An electropneumatic door control, particularly for the control of doors in public transportation, which includes for the purpose of detecting the respective position of the door linear motion sensors (1, 2) which are mounted on the pneumatic door cylinders (4, 5) or on the axes of rotation of the door wings, and whose output signals are evaluated by electronics (3). The electronics (3) include a computer which automatically detects the end positions as well as the motion behavior of the door or obstructions, respectively, and triggers a monitoring function, if necessary. The proposed door control increases reliability and eliminates previously used limit switches and electropneumatic differential pressure switches.

REFERENCES:
patent: 2832588 (1958-04-01), Newkirk
patent: 4300661 (1981-11-01), Hmelovsky
patent: 4300663 (1981-11-01), Hmelovsky et al.
patent: 4342379 (1982-08-01), Games et al.
patent: 4376971 (1983-03-01), Landgraf et al.
patent: 4476678 (1984-10-01), Hall
patent: 4478131 (1984-10-01), Liermann et al.

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