Stoves and furnaces – Heaters – Surface
Patent
1977-10-31
1979-05-08
Sprague, Kenneth W.
Stoves and furnaces
Heaters
Surface
237 1A, 165115, 165135, F24J 302
Patent
active
041530438
ABSTRACT:
Apparatus for heating and maintaining the temperature of water in a hot water tank of a solar hot water system and method of making same are provided wherein such apparatus comprises a thermally insulating container disposed around and in spaced relation from the tank with the container having a bottom portion defining a sump for a heat transfer liquid employed in the system and a device for maintaining the level of such liquid in the sump beneath the tank during normal system operation to thereby assure maintenance of an air space substantially completely around the tank with the air space cooperating with the insulating container to assure the temperature of water in the tank is maintained with minimum loss; and, the apparatus may also employ a pressure sensitive shut-off device in the cold water supply to the tank which cooperates with the air space to assure operation of the system with substantially no likelihood of contamination of the cold water supply.
REFERENCES:
patent: 1250260 (1917-12-01), Wilcox
patent: 3254703 (1966-06-01), Thomason
patent: 3991936 (1976-11-01), Switzgable
patent: 4037579 (1977-07-01), Chubb
Reynolds Metals Company
Sprague Kenneth W.
Yeung James C.
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