Ceramaspeed Limited

Zortech International Limited

Ali Paybarah

Joseph A McWilliams

A radiant electric heater comprises a dish-like component (,) of thermal insulation material having a base (,) and an upstanding peripheral wall (,). At least one heating element (,) is supported inside the dish-like component, and reinforcing means (,) is secured to the outside of the dish-like component at the outside thereof. The reinforcing means (,) comprises at least one strip (,A,,A) extending across the base (,) and at least partly up the peripheral wall (,) of the dish-like component (

Radiant electric heater

An electrical resistance heating element is made from an electrical resistance material having the following composition in weight percent:

Method of manufacturing an electrical resistance heating means

A radiant electric heater having an electric heating element in the form of an elongate electrically conductive strip supported on edge and partially embedded in a layer of microporous thermal and electrical insulation material in a support dish is manufactured by placing an elongate electrically conductive strip on edge in a groove in a press tool, such that a portion of the strip protrudes from the groove, the groove being formed of a pattern corresponding to that required for a heating element in the heater. A predetermined quantity of powdery microporous thermal and electrical insulation material is arranged between the press tool and a support dish of the heater, and the insulation material is compressed into the support dish with the press tool, the material being compacted to form a layer of a desired density and simultaneously compacted against the portion of the strip protruding from the groove, to secure the strip on edge in partial embedment in the layer of the insulation material.

Method of manufacturing a radiant electric heater

A wound coil which is rotating about its axis is cut and severed against a stationary member by moving a rotatable cutting blade incorporating a circular cutting edge towards the rotating coil and the stationary member such that the cutting blade rotates about the axis of the arcuate cutting edge against the wound coil, becomes inserted between adjacent turns of the wound coil and cuts the wire forming the coil against the support. Once the coil has been cut, the cutting blade is moved away from the coil. A roller is provided to limit movement of the cutting edge of the cutting blade in the axial direction of the coil.

Apparatus for cutting wound coils

A close wound coil is formed by a sequence of steps including supplying a wire to be formed into a coil onto a rotating mandrel by means of a guide wheel and urging the wire against the mandrel by means of a pressure wheel so as to form a coil. The formed coil is allowed to free itself from engagement with the mandrel from a point immediately following that at which the wire is urged against the mandrel by the pressure wheel to the end of the mandrel so that the formed coil, although carried by the mandrel, is unrestrained relative to the mandrel.

Coil winding method and apparatus

Vibrations that arise during the winding of a coil of wire onto a rotating mandrel are damped by surrounding the coil with a tube such that the tube is spaced from the coil and by supplying fluid to the tube. The tube extends in the axial direction of the coil along at least a part of its length and, due to the spacing between the tube and the coil, conducts fluid such as water in a confined manner towards at least one end of the tube and releases the fluid from the end of the tube, for example in a region of the coil adjacent to and/or remote from the winding of the coil.

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Droitwich, United Kingdom

Ali Paybarah