A mobile heater that can be easily moved to any location and can be stored and transported in a compact configuration is disclosed. The mobile heater comprises of a housing with a removable combustion chamber that can be removed and reattached as desired and one or more wheels that are movably attached to the housing, means for containing a combustible fuel within said housing, means for controlling and delivering the combustible fuel from said means for containing a combustible fuel to a nozzle...

A pressureless electric water heater for domestic use having a cylindrical double-walled tank for holding a quantity of a heat transfer liquid such as water. Cold water enters a copper coil immersed in the heat transfer liquid. The heat transfer liquid is heated by an electric heating element that extends down a double-walled top. The inner walls and the outer walls of the tank and the upper and lower walls of the top may be spaced apart using any convenient spacing distance, in order to accommo...

An improved aquarium heater and particularly an aquarium heater that has a protective device adjacent to an electric heating coil to cut off the electric circuit when the heater is overloaded to prevent the heating coil from continuously heating to avoid risks and hazards includes a glass tube housed a circuit board in an upper section thereof, a heating coil located below the circuit board connecting to the circuit board, a control plug sealed the top opening of the glass tube, and a protective...

A water heater comprising a water-tight tank having a combustion chamber located in the bottom portion of the tank. A combustion air blower is operable to draw combustion air into the combustion chamber through a vertical tube in which the air flows from atmosphere downwardly into the combustion chamber. Combustion air entering the combustion chamber supports combustion of gas emanating from burners positioned in the combustion chamber. The products of combustion (flue gases) are drawn upwardly ...

A ceramic heater capable of reducing temperature uniformity at the periphery of through holes such as insertion holes and vacuum suction holes is provided, which protects wafer against thermal shocks and has improved controllability for temperature control parts such as thermocouples and temperature fuse. Further, a ceramic heater capable of uniform resin curing is provided. A heat generation body is disposed on the surface or inside of a ceramic substrate. Further, corners for the insertion hol...

Disclosed herein is a heater comprising a wall-engaging member mountable to a wall, an extendable arm including proximate and distal ends. The proximate end being mounted to the wall-engaging member. The heater also includes a heat projecting heater-head mounted to the distal end of the extendable arm. Wherein the heater-head is reciprocally movable between a first position where the heater-head is in close proximity to the wall-engaging member and a second position where the heater-head is dist...

A ceramic heater including a ceramic body and a heating element buried in the ceramic body under the surface of thereof is provided, wherein metal pads are disposed on the outside of the ceramic body and electrically connected to the heating element, outer leads are joined by a braze layer onto a metal plated layer covering each of the pads, and the braze layer contains an amount of 500 ppm or less by weight of palladium in a brazing metal material based on Au, Cu, or Ni. The plated layer may be...

A scroll compressor is provided with a thermostat selectively closing when predetermined temperatures are reached to deliver current to a heater associated with a motor protector switch. The thermostat is able to more quickly close in response to undesirable conditions in the compressor, than would be the case with the motor protector switch typically found at the motor. The circuit associated with the motor protector switch preferably includes at least two heaters, with the normal heater associ...

A pyrolysis heater particularly for the cracking of hydrocarbons in the production of olefins has a burner arrangement in the firebox which directly heats the hearth of the firebox such that it becomes a radiant surface. This improves the heat flux in the lower portion of the firebox and produces a more uniform vertical heat flux profile over the firebox elevation. The base burners may fire horizontally across the hearth or may comprise porous ceramic burners as a part of the hearth. The base bu...

A water heater including a water tank, a water inlet line for adding water to the water tank, a water outlet line for withdrawing water from the water tank, at least one electric resistance heating element extending into the water tank to heat water in the water tank, at least one water temperature sensor operable to sense a water temperature, and a control circuit capable of conducting electric power to the electric resistance heating element. The control circuit controls the conduction of elec...