Liquid heaters and vaporizers – Stand boiler – Fluid fuel burner
Patent
1977-10-31
1978-11-28
Sprague, Kenneth W.
Liquid heaters and vaporizers
Stand boiler
Fluid fuel burner
122448R, 126351, 236 25R, F23N 108, F22B 904
Patent
active
041270851
ABSTRACT:
In an automatic water heater having a casing, a support base, a water tank with an outlet in its top wall, and a hot water intake in its bottom wall, a combustion chamber in said base including a bonnet having an exhaust outlet, and a flue pipe axially disposed through said tank connected to said bonnet outlet, the improvement which comprises a cast iron gas burner supported on said base having a gas inlet. A series of spirally arranged continuous copper pipe coils are nested within the bonnet overlying said burner having a cold water inlet at said base and an outlet connected to the hot water intake. A hot water delivery pipe at one end is connected to the tank outlet and has at least one water faucet. An electronic igniter extends into the combustion chamber and includes an electrical circuit with power means for intermittently activating said igniter. A gas delivery pipe is connected to said gas inlet and includes a normally enclosed solenoid actuated gas valve. A normally open water pressure switch is mounted upon said hot water delivery pipe in communication with its interior and connected to the normally closed gas valve whereby, opening of a faucet closes said switch to open said gas valve and momentarily energize said igniter.
REFERENCES:
patent: 1862630 (1932-06-01), Morrow
patent: 2814279 (1957-11-01), Thomas
patent: 2901175 (1959-08-01), Keppel
patent: 2972445 (1961-02-01), Keppel
patent: 3139067 (1964-06-01), Van Den Broek et al.
Katz Donald J.
Katz Wilfred L.
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