Electronic cutout circuit for vacuum cleaners

Details Electronic cutout circuit for vacuum cleaners Electronic cutout circuit for vacuum cleaners

A - Human Necessities

47

L

15/53.1

A47L 9/28 (2006.01) G01P 1/10 (2006.01) H02H 7/093 (2006.01)

Patent

CA 1102056

- 13 - ELECTRONIC CUTOUT CIRCUIT FOR VACUUM CLEANERS ABSTRACT An upright vacuum cleaner having a brush roller rotatably driven by a belt from the cleaner motor and having a safety device for protecting the belt and motor when the brush rotation falls below a predetermined speed. The device includes a magnet in the brush rol- ler, a rotation sensing circuit for generating a pulse for each revolution of the magnet and a motor shut-off circuit controlled by the sensing circuit to shut-off power to the motor when the pulse rate falls below that desired.

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