Title:
Automatic detergent feeding control
United States Patent 2859760
US Patent References:
Device for recovering condensation waters
- - 1953491
Level regulator for viscous liquids
- - 1981530
Solution concentration control system
- - 2377363
Electric detection apparatus
- - 2483450
Apparatus for controlling the concentration of solutions which tend to foam
- - 2490634
Device for recovering condensation waters
- - 1953491
Level regulator for viscous liquids
- - 1981530
Solution concentration control system
- - 2377363
Electric detection apparatus
- - 2483450
Apparatus for controlling the concentration of solutions which tend to foam
- - 2490634
Inventors:
Borell, George L.
Publication Date:
11/11/1958
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Assignee:
Borell, George L.
Primary Class:
Other Classes:
137/392, 134/57D
International Classes:
A47L15/44; G05D21/02; G05D21/00
US Patent References: