An electric heater (100, 200, 300, 400, 600, 700, 800, 900) has at least one coil body (110, 210, 310, 410, 510, 610, 660, 670, 710, 810, 860, 910, 1010) in the form of a tube having any desired cross section, in the form of a partially slotted tube having any desired cross section or in the form of a slotted tube having any desired cross section and at least one electric heating element (120, 220, 320, 420, 520, 620, 621, 622, 720, 820, 870, 920, 1020), which is wound onto the coil body. The electric heating element is wound onto the coil body to both extend over sections of the inner side (515, 915) of the tube, partially slotted tube or slotted tube forming the coil body and sections of the outer side (516, 916) of the tube, partially slotted tube or slotted tube forming the coil body.

A method for joining primary and secondary members includes providing a primary member, a secondary member and a heating element which is joined to one of the primary and secondary members. The heating element includes an electrically insulating matrix material and an electrically conductive reinforcing clement extending through the matrix material. The method further includes bringing the other of the primary and secondary members and the heating element into engagement and controlling a flow of electrical current in the reinforcing element so as to resistively heat and fuse at least some of the matrix material of the heating element with a matrix material of the other of the primary and secondary members. The method may be used to join a primary member such as a composite tubular and a secondary member such as a component for terminating the composite tubular.

An electrical heating assembly (1), in particular for use in a heatable seat device, comprises a plurality of heating wires (11, 12, 13, 14, 15) and a support structure (8) adapted to fix the heating wires (11, 12, 13, 14, 15). The heating wires (11, 12, 13, 14, 15) are arranged to form a plurality of hot points (10), a respective hot point (10) being defined by a circular area of 6 mm in diameter in which there are present at least three sections of heating wire (11, 12, 13, 14, 15) which are not interconnected to each other within the area of the hot point (10).

A heated laminated windscreen including two sheets of glass joined by an inserted sheet, and including a system of conductive layers covering most of a surface of one glass sheet of the windscreen. The system is electrically powered by busbars at a top and bottom of the windscreen, with windows which are devoid of layers arranged at the top in the middle of the windscreen. The windscreen further including at least one additional busbar arranged laterally on edges and at the top of the windscreen.

Laminar heaters having a laminar heating element with a pair of electrically conductive busbars connected to opposite ends of the heating element and a plurality of areas. The heater has a first electrical resistance in a first area and a second electrical resistance in a second area. At least one of the first area or the second area comprises a plurality of perforations, and the difference between the first electrical resistance and the second electrical resistance arises from a difference in a perforation characteristic of the first portion relative to the second portion. A plurality of heaters or heating elements may be connected together in a system for heating a surface.

An aerosol generating device includes a heating element of which inner surface have different portions having different structures such that the portions of the heating element may heat corresponding areas of an aerosol generating article which is inserted in the aerosol generating device at different temperatures, thereby providing a good quality of aerosol to the user.

A multi-zone heater with a plurality of thermocouples such that different heater zones can be monitored for temperature independently. The independent thermocouples may have their leads routed out from the shaft of the heater in a channel that is closed with a joining process that results in hermetic seal adapted to withstand both the interior atmosphere of the shaft and the process chemicals in the process chamber. The thermocouple and its leads may be enclosed with a joining process in which a channel cover is brazed to the heater plate with aluminum.

A heater comprises a housing, multiple heating tubes arranged in the housing, a pair of retaining members installed in the housing, and a single heating wire. The housing has two opposite ends in a longitudinal direction thereof, with the heating tubes arranged in a row along the longitudinal direction. Each retaining member is strip shaped, with one of the pair of retaining members holding first ends of each of the multiple heating tubes, and the other of the pair of retaining members holding second ends of each of the multiple heating tubes. The single heating wire passes through the multiple heating tubes in sequence.

A plate shaped heater for heating a heat shrink tube on a cable includes a housing, multiple heating tubes arranged within the housing, and a heating wire arranged in the multiple heating tubes. The housing defines opposite ends in its longitudinal direction. The heating tubes extend along a transverse direction of the housing and are arranged in a row along the longitudinal direction of the housing. An arrangement density of the heating tubes in two end regions proximate two ends of the housing is greater than an arrangement density of the heating tubes in a middle region between the two end regions of the housing.

There is provided a technique that includes: a heat generator installed for each of control zones and configured to raise an internal temperature of a reaction tube by heat generation; a circuit configured to equalize resistance values in the respective control zones, wherein the circuit is a parallel circuit and is configured such that an output variable element is installed in one or more of output circuits constituting the parallel circuit.