Watlow Electric Manufacturing Company

Michael W Ruhr

Louis P Steinhauser

Mark Denis Everly

Richard T Williams

Mark Hoven

Mark L G Hoven

Richard T Williams, Jr

Curt St Clair

Brad McDonnell

Mark L Hoven

A heater system includes a heater bundle. The heater bundle includes a plurality of heater assemblies. Each heater assembly includes a plurality of heater units and an insulating material, and each heater unit defines at least one independently controlled heating zone. The heater bundle includes power conductors electrically connected to each of the independently controlled heating zones in each of the heater units. The heater bundle includes a power supply device configured to modulate power to each of the independently controlled heater zones of the heater units through the power conductors. A voltage is selectively supplied to each of the independently controlled heating zones such that a reduced number of independently controlled heating zones receives the voltage at a time or at least a subset of the independently controlled heating zones receive a reduced voltage at all times.

Heater bundle for adaptive control and method of reducing current leakage

An electrical heater and method includes heating member, a cable, and a connector. A resistance heating element is within a sheath of the heating member. A proximal end of the sheath is inserted into a slot of a first fitting and welded to the first fitting with first and second leads extending into the first fitting. The second fitting is threadably engaged with the first fitting. The second fitting defines a central bore disposed about the axis. An end of a power cable extends into the second central bore. A first wire is coupled to the first lead. A second wire is coupled to the second lead.

Compact robust connector assembly for high voltage electrical heaters

A method of controlling a heating system is provided that includes having at least one heater assembly, the heater assembly comprising a plurality of heater units, each heater unit defining at least one independently controlled heating zone, supplying power to each of the heater units through power conductors electrically connected to each of the independently controlled heating zones in each of the heater units, and modulating power supplied to each of the independently controlled heating zones. A voltage is selectively supplied to each of the independently controlled heating zones such that a reduced number of independently controlled heating zones receives the voltage at a time, or at least a subset of the independently controlled heating zones receive a reduced voltage at all times.

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Hannibal, MO, United States of America

Michael W Ruhr