Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

1985-12-30

1987-07-21

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

250574, 356343, 356438, A47L 928

Patent

active

046808272

ABSTRACT:
In a vacuum cleaner for industry and household in which the speed control for the blower motor for the vacuum cleaner is effected by evaluating the dust concentration given at any time in the suction line by opto-electrical means (light transmitters, light receivers) it is proposed to use the signal pulses, which are derived from the light receivers depending on the measured dust particles, for controlling an additional light transmitter (luminous diode) which directly coacts with a light-sensitive resistor which is at the same time part of the control resistance of a triac connected in the motor circuit of the blower motor. Preferably, the optoelectrical dust concentration measuring arrangement may comprise a plurality of light transmitters and light receivers and may be arranged directly adjacent to the air intake opening of a vacuum cleaner housing.

REFERENCES:
patent: 4297578 (1981-10-01), Carter
patent: 4580311 (1986-04-01), Kurz
patent: 4601082 (1986-07-01), Kurz

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