Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1975-11-14
1977-09-27
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
200 6104, 417212, 250577, 417215, F04B 4900, E04H 316, H01H 2900
Patent
active
040508536
ABSTRACT:
A small well fills with rain water and a float in the well rises to interrupt a light beam that falls on a photoelectric cell. The photoelectric cell keeps a control circuit open as long as it is exposed to the light beam and closes the control circuit in the absence of a light beam. The photoelectric cell turns on a blower to inflate a swimming pool cover and simultaneously energizes a lamp bulb to evaporate the water in the small well. When the rain ceases the lamp bulb evaporates the water in the well to lower the float and thereby stop the blower and turn off the lamp bulb. A selector switch has a normal first position to ready the rain-responsive control circuit and has a second position for energizing the blower directly when a person desires to inflate the swimming pool cover for use of the swimming pool in the absence of rain.
REFERENCES:
patent: 2070617 (1937-02-01), Offott
patent: 2305090 (1941-12-01), Kronquest
patent: 2361235 (1944-10-01), Pick
patent: 2710715 (1955-06-01), Gorham
patent: 3193637 (1965-07-01), Russell
patent: 3333072 (1967-07-01), Haggard, Jr.
patent: 3440396 (1969-04-01), Greene, Jr.
patent: 3810262 (1974-05-01), Strand
patent: 3848627 (1974-11-01), Page
Norburg et al., entitled "A Rapid-Response Rain Gauge," from J. Phys. E. Instrum. (Aug. 1971).
Brown Boniard I.
Freeh William L.
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