Electric heating elements

Details Electric heating elements Electric heating elements

1975-12-22

1977-01-04

Albritton, C. L.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

29611, 219335, 317 9AC, 338228, F24H 100

Patent

active

040015475

ABSTRACT:
Our invention relates to electric heating elements for heating liquid within a tank, and particularly to heating elements for use in domestic commercial water tanks, wherein the element comprises a metal mounting member secured to the wall of the tank and a sheath portion carried by the mounting member and extending through a hole in the tank wall for immersion in the water in the tank. The sheath portion contains a resistance conductor and insulation which electrically insulates the conductor from the sheath, so that water in the tank is heated when the resistance conductor is electrically connected to a source of electrical energy.
Our invention provides means for protecting the electric heating element from damage which may otherwise be caused by a sudden surge of high voltage, such as that which may be caused by lightning disturbances in the immediate vicinity.

REFERENCES:
patent: 2614200 (1952-10-01), McNair
patent: 3859721 (1975-01-01), Cunningham et al.
patent: 3916145 (1975-10-01), Skinner

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