Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Including compensation for thermal change of electromagnetic...
Patent
1991-04-12
1992-02-18
Kozma, Thomas J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Including compensation for thermal change of electromagnetic...
336 73, 336 87, 336136, 336179, H01F 1516
Patent
active
050899309
ABSTRACT:
A differential transformer is provided comprising an elongated bobbin having primary and secondary coils wound about separated sections. A ferromagnetic armature is movably disposed within a core of the bobbin for movement between the separated sections. A tube of electrically conducting material surrounds the bobbin core. The tube is formed of a material whose resistance varies with temperature in the same manner as the primary coil.
REFERENCES:
patent: 2494579 (1950-01-01), Pimlott et al.
patent: 3183126 (1965-05-01), Curtis et al.
Kozma Thomas J.
Pickering Controls, Inc.
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