Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1981-03-02
1983-12-06
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219316, 219318, 219523, 338229, 338241, 338333, H05B 382, H01C 100, F24H 120
Patent
active
044195672
ABSTRACT:
The heating element has an outer connector assembly including a cylindrical threaded portion adapted to be threaded into a boss on the heater water tank and a sheathed continuous electric resistance heating rod which has both ends secured to the connector assembly and which extends generally perpendicular to the heater tank centerline when installed. The heating rod is formed in a serpentine, generally W-shaped pattern with respect to the centerline of the cylindrical threaded portion, which provides the heating rod with an effective length greater than the inside diameter of the water tank, permits the heating rod to be inserted and withdrawn through the bore of the tank boss and permits the heater rod to be rotated, as the connector assembly is being threaded into and out of the tank boss, without striking any obstructions inside the water tank, such as the cold water dip tube, the hot water pipe and the anticorrosion anode. The heating rod is so bent that the portions between the ends thereof extend in the generally W-shaped pattern in first and second vertically spaced horizontal planes as either a single double W or a pair of double W's.
REFERENCES:
patent: 2446555 (1948-08-01), Sage
patent: 2533615 (1950-12-01), Osterheld
patent: 2544458 (1951-03-01), Higgins
patent: 2606271 (1952-08-01), Morris
patent: 2649532 (1953-08-01), Woodman
Fehrmann George L.
Murphy Robert A.
Apcom, Inc.
Bartis A.
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