1
Philip S Carter, John F Krumme: Alternating current electrically resistive heating element having intrinsic temperature control. Iris Associates, C Michael Zimmerman, March 17, 1981: US04256945 (393 worldwide citation)

The heating element consists of a substrate or core of a non-magnetic material having high thermal and electrical conductivity, clad with a surface layer of a ferromagnetic material of relatively low electrical conductivity. When the heating element is energized by a source of high frequency alterna ...


2
Philip S Carter, John F Krumme: Shielded heating element having intrinsic temperature control. Metcal, Hall Myers & Rose, October 20, 1987: US04701587 (244 worldwide citation)

A heating structure is described having both a return conductor and a heating element consisting of a substrate of a non-magnetic material having high thermal and electrical conductivity, clad with a surface layer of a ferromagnetic material of relatively low electrical conductivity.


3
Philip S Carter: High power self-regulating heater. Metcal, Hall Myers & Rose, March 21, 1989: US04814587 (187 worldwide citation)

An improved performance ferromagnetic self-regulating heater. Constant alternating current is applied to a layered structure including at least one ferromagnetic layer. One or more layers of non-magnetic material is added to the ferromagnetic layer in such a way that the power factor of the heater i ...


4
Philip S Carter: High efficiency autoregulating heater. Metcal, Hall Myers & Rose, May 17, 1988: US04745264 (45 worldwide citation)

The impedance of an autoregulating heater is greatly increased by employing in one embodiment a return conductor in the form of a helix surrounded by and insulated from a magnetic conductor; the two conductors connected in series or as a transformer across an a.c. source whereby the current in the m ...


5
Philip S Carter Jr, Michael Hodges, John P Ekstrand, Andrew Tomlinson: Thermal induction heater. Metcal, Howard L Rose, April 5, 1994: US05300750 (42 worldwide citation)

A heater employs a ferromagnetic or like material heated by a varying magnetic field to heat the ferromagnetic material wherein the ferromagnetic material has a large cross-section comprised of many members of small cross-section insulated from one another and wherein for medical applications each m ...


6
Mark J Cowell, Kevin Ladd, Philip S Carter Jr: Self regulating heater. Metcal, Shlesinger & Myers, October 31, 1989: US04877944 (40 worldwide citation)

A self regulating heater comprises a non-conductive, magnetic core having a coil wound about it and providing pole pieces extending into contact or very near contact with a surrounding ferromagnetic member which in turn may be surrounded by and in intimate contact with a non-magnetic low resistance ...


7
Philip S Carter Jr: Temperature control in which the control parameter is the degree of imperfection in the impedance matching. Metcal, Hall Myers & Rose, January 3, 1989: US04795886 (29 worldwide citation)

A temperature control system is disclosed for controlling heating current to a heater having an impedance which varies substantially with temperature. The change in impedance of the heater changes the degree of mismatch between the power transmission system and the heater resulting in a change in th ...


8
Philip S Carter Jr, Frank A Doljack: Thermal seed for treatment of tumors. Metcal, Howard L Rose, July 28, 1992: US05133710 (15 worldwide citation)

A heater (seed) and system for subjecting body tissue to closely controlled hyperthermia or higher temperatures includes a core of ferromagnetic material having a high resistivity or resistivity of a non-conductor enclosed with a bio-compatible non-magnetic conductive sheath and excited by a coil po ...


9
Philip S Carter Jr: Transverse electric heater. Metcal, Howard L Rose, March 16, 1993: US05194708 (10 worldwide citation)

A temperature self-regulating heater has a thin first layer of high magnetic permeability, a second layer of electrially conductive non-magnetic material forming a substrate and a heat conductive dielectric disposed between the layers. A varying (preferably r.f.) magnetic field is imposed upon the e ...


10
Philip S Carter Jr: Parallel supply for multiple loads from a single power supply. Metcal, Howard L Rose, July 7, 1992: US05128602 (5 worldwide citation)

A single constant voltage power supply concurrently supplies a plurality of independent loads each with an independently selectable constant current load without interaction between the loads (currents) by employing a plurality of parallel connected circuits of electrical lengths equal to (2n-1)90.d ...