Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1979-01-08
1981-01-20
Moore, Christopher K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15391, 318461, 361 23, H02H 708, A47L 928
Patent
active
042453704
ABSTRACT:
A control circuit for effectively preventing damage to the blower or fan motor of a vacuum cleaner which could otherwise result from a jammed condition of the beater brush thereof. The control circuit effects discontinuation of the energization of the motor in the event the rotational speed of the beater brush drops below a preselected speed. The discontinuation of energization may be effected by the control a preselected period of time after the speed drops below the preselected speed. An indicating device may be provided for indicating such discontinuation of energization. A second indicating device may be provided for indicating a reduction in speed of the beater brush less than that sufficient to cause discontinuation of the energization but sufficient to warrant warning the user that a partial jamming of the beater brush has occurred. The control may be arranged to require manual operation of the operating switch of the vacuum cleaner to the "off" condition and subsequently to the "on" condition to re-energize the motor subsequent to such discontinuation of energization. The control includes means for causing the discontinuation of energization of the motor in the event the motor does not come up to a preselected speed within a preselected period of time after such operation of the control switch to the "on" position. The speed of the beater brush may be sensed by a Hall effect sensor responding to magnetic pulses from a magnet rotatable with the beater brush.
REFERENCES:
patent: 2323554 (1943-07-01), Mason
patent: 2421235 (1947-05-01), Basinger
patent: 2451816 (1948-10-01), Dunn
patent: 2467582 (1949-04-01), Corkran
patent: 2472526 (1949-06-01), Frazee
patent: 3266078 (1966-08-01), Brown et al.
patent: 3389321 (1968-06-01), Miller et al.
patent: 3536977 (1970-10-01), Porter
patent: 3728604 (1973-04-01), Grygera
patent: 3845375 (1973-11-01), Stiebel
patent: 4025832 (1977-05-01), Jones
patent: 4099291 (1978-07-01), Bowerman
patent: 4163999 (1979-08-01), Eaton et al.
Moore Christopher K.
Whirlpool Corporation
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