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Document |
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7554063 |
Heating apparatus
A heating apparatus including a housing defining a volume of air therein having an inlet and an outlet aperture. The heating apparatus also includes a heat generator having an elongate tubular...
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7446286 |
Heater strip for an electric heater, heater with such a heater strip and method for manufacturing the heater strip
A heater strip for use as a heating element in an electric heater is made up of a profiled strip made of a flat metallic material forming a resistor section and of mounting elements extending over...
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6414281 |
Hot-toe multicell electric heater
A multicell heater is shown with typically round outer tubing, containing a plurality of resistive heating elements having a common inner sheath. The inner sheath has a preferably non-circular...
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5118921 |
Metallic sheath heater with improved electrical connection between coil and sheath and method of manufacture thereof
A sheath heater includes a metal sheath, a coil-like heater, and a heat-resistant insulating powder. The starting form of the metal sheath has a small-diameter cylindrical portion at its distal end...
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4593182 |
Electric cartridge heater
A cartridge heater includes an inner casing in which a heating element is accommodated. This inner casing is surrounded by an coaxially arranged outer casing of larger diameter so that an annular...
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4510377 |
Small cartridge heater
A cylindrical core of a ceramic such as alumina (Al2 O3) has grooves in the form of a double lead thread. A coil of Nichrome V is placed in the grooves, starting in one lead of the thread and...
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4419567 |
Heating element for electric water heater
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...
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4358667 |
Cartridge-type electric immersion heating element having an integrally contained thermostat
A cartridge-type electric immersion heating element having an integrally contained, self-limiting thermostatic control included in its electrical circuit includes an electric resistance heating...
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4346287 |
Electric heater and assembly
An electrical heater comprising a heating element, a sheath surrounding the heating element and spaced therefrom, the sheath having an end spaced from an end of the heating element, electrical...
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4210799 |
Electric heating units
The invention is directed to a termination for a surface unit having a flat spiralled active heating portion and a single, downward and laterally-extending terminal leg. The termination is...
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4115686 |
Cartridge heater with improved thermocouple
A cartridge heater with improved thermocouple comprising a tubular metal sheath with a front end having a central opening therein, a metal plug engaged in and closing said opening, a filler of...
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3970822 |
Electric cartridge heater
An electric cartridge heater having a metallic tubular metal sheath with an elongate heating element of generally circular cross section therein, the heating element being substantially coaxial...
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3920963 |
Resistance heater with improved thermocouple
A resistance heater structure with a tubular metal jacket, which jacket is swaged inwardly to reduced diametric extent during manufacture of the heater; a thermocouple junction comprising two...
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3890485 |
Electric heaters
A sheathed electrical heater, preferably of the cartridge type, having a built-in thermocouple with its heat sensing junction at the inner end of the heater. The invention provides a construction...
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3831004 |
ELECTRIC HEATER
A cartridge or band heater having an internally threaded bushing secured thereof affording a secure mounting for electric wires or a conduit containing such wires.
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3617703 |
SURFACE-TYPE ELECTRIC HEATING TREATMENT ELEMENTS
A surface-type electric heating element with terminal pins disposed within opposite ends of a tubular metal sheath and connected to respective ends of the heating resistance within the sheath,...
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3512114 |
ELECTRIC RESISTANCE HEATER
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3310769 |
Cartridge heater
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3286214 |
Measuring resistance
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3254320 |
Electric heaters
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2831951 |
Cartridge heater and method of making same
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2824199 |
Electrical heating element
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2794504 |
Well heater
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