Control system for smoke exhauster

Details Control system for smoke exhauster Control system for smoke exhauster

1995-04-28

1997-04-22

Gordon, Paul P.

Boots, shoes, and leggings

364143, 318 66, 454906, G05B 1101

Patent

active

056234007

ABSTRACT:
A smoke exhauster includes a CPU, two motors and a switching circuit connected to the CPU. The switching circuit includes a common contact, a parallel contact for connecting the motors in parallel, and a series contact for connecting the motors in series. The common contact is connected to the parallel contact for allow higher power supply to start the motors, and the common contact is connected to the series contact for reducing power supply to the motors in order to reduce the rotational speed of the motors. The motors are connected in series after the motors are started.

REFERENCES:
patent: 4458185 (1984-07-01), Matty et al.
patent: 4992709 (1991-02-01), Griffin
patent: 5174248 (1992-12-01), Couetoux
patent: 5466995 (1995-11-01), Genga

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