Dispensing – With recorder – register – indicator – signal or exhibitor
Patent
1986-02-05
1988-03-29
Rolla, Joseph J.
Dispensing
With recorder, register, indicator, signal or exhibitor
222 52, 222644, 134113, 137 5, 137 93, 324441, 324445, B67D 508
Patent
active
047337982
ABSTRACT:
The invention includes a method and apparatus for controlling the concentration of wash water in a ware washing machine. A preferred ware washing machine (10) includes a reservoir (11) for holding wash water, a normally closed valve (17) for directing clean water to a dry detergent supply (13), an electrodeless conductivity cell (12) for monitoring the conductivity of the ware washing solution, and a controller for activating the normally closed valve (15) in response to the difference between the measured concentration and the actual concentration. A preferred concentration controller includes an adjustable amplifier (48) which provides an amplified concentration signal which is equal to a reference signal when the concentration of the solution is equal to the desired concentration. In addition, a preferred conductivity cell (12) includes a thermistor (46) which, in effect, increases or decreases the voltage of the signal produced by the secondary coil to remove the apparent concentration changes solely associated with changes in temperature of the washing solution.
REFERENCES:
patent: 2370609 (1945-02-01), Wilson et al.
patent: 2715722 (1955-08-01), Relis
patent: 3095121 (1963-06-01), Douty et al.
patent: 3253741 (1966-05-01), Russell et al.
patent: 3307744 (1967-03-01), Burford
patent: 3319637 (1967-05-01), Gore et al.
patent: 3389332 (1968-06-01), Ketcham
patent: 3595438 (1971-07-01), Daley
patent: 3603873 (1972-09-01), Ciruis
patent: 3680070 (1972-07-01), Nystuen
patent: 3850344 (1974-11-01), Burge et al.
patent: 3876106 (1975-04-01), Powell et al.
patent: 3999687 (1976-12-01), Baer et al.
patent: 4020865 (1977-05-01), Moffat et al.
patent: 4056470 (1977-11-01), Carpenter
patent: 4063663 (1977-12-01), Larson et al.
patent: 4076146 (1978-02-01), Lausberg et al.
patent: 4389972 (1983-06-01), Hirakura et al.
patent: 4426362 (1984-01-01), Copeland et al.
patent: 4440314 (1984-04-01), Vetter et al.
Instruction Book, The Foxboro Company, 1984.
Brady Daniel F.
Johnson Charles B.
Larson Spencer B.
Ziegler David B.
Ecolab Inc.
Handren Frederick R.
Rolla Joseph J.
LandOfFree
Method and apparatus for controlling the concentration of a chem does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for controlling the concentration of a chem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling the concentration of a chem will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1084767