Door-operated safety shutoff system

Details Door-operated safety shutoff system Door-operated safety shutoff system

1981-09-11

1984-04-03

Rimrodt, Louis

Textiles: fiber preparation

Drying

19 80R, 19 98, 19200, F16P 308, D01G 3100

Patent

active

044398948

ABSTRACT:
A safety system operatively connected with a door, includes an air line, a pressure difference generator communicating with the air line and operatively connected with the door for altering the pressure of air in the air line when the door moves from a closed position to an open position and a pressure-responsive switch operatively connected with the air line for presenting an output indication in response to the alteration of air pressure in the air line.

REFERENCES:
patent: 3303303 (1967-02-01), Miller
patent: 3814877 (1974-06-01), Aluarez
patent: 4238651 (1980-12-01), Tann

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