Vacuum cleaner with dirt detection

Details Vacuum cleaner with dirt detection Vacuum cleaner with dirt detection

1995-06-05

1997-03-11

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, A47L 928

Patent

active

056089449

ABSTRACT:
The disclosure describes a vacuum cleaner having a dirt sensor circuit usable with an audio detector. The circuit provides amplification of the audio signal, a pulse stretcher, sensitivity selection of a non linear characteristic and visual signal means to indicate high or low levels of dirt concentration.

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