Cleaning machine for carpet, upholstery and draperies

Details Cleaning machine for carpet, upholstery and draperies Cleaning machine for carpet, upholstery and draperies

1987-09-11

1989-02-07

Swann III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

15319, 219327, 340540, G08B 2100

Patent

active

048034665

ABSTRACT:
A cleaning machine for carpet, upholstery, draperies, and the like is designed with a safety system to prevent the cleaning liquid from being inadvertently overheated. The system senses the electrical conductivity or the density of the liquid and then limits the heating to a temperature which has been programmed to correspond that conductivity or density.

REFERENCES:
patent: 1539039 (1925-05-01), Blanding
patent: 2879372 (1959-03-01), Dammond
patent: 3485245 (1969-12-01), Lahr et al.
patent: 4112538 (1978-09-01), Bates
patent: 4207649 (1980-06-01), Bates
patent: 4308636 (1982-06-01), Davis
patent: 4336627 (1982-06-01), Bascus
patent: 4443909 (1984-04-01), Cameron
patent: 4721950 (1988-01-01), Andrejasich et al.
patent: 4728941 (1988-03-01), Andrejasich

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