Electromagnetic switching device

Details Electromagnetic switching device Electromagnetic switching device

1975-07-31

1976-10-19

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Polarity-responsive

335151, 335154, H01H 5122

Patent

active

039873838

ABSTRACT:
An electromagnetic switching device comprises a bobbin with a coil mounted thereon, the bobbin forming a protective tube with a contact chamber at each end. Embedded in the bobbin are a plurality of terminals connected to the coil, pole shoes, and contact terminals connected to the pole shoes. An armature is disposed in the tube and has two free end portions coated with contact material facing end portions of the pole shoes that extend from opposite walls of a respective one of the contact chambers. At least one permanent magnet is mounted between flanges of the bobbin at each end of the tube, these magnets and the pole shoes being disposed symmetrically in relation to the longitudinal axis of the tube and at least one further axis perpendicular to such longitudinal axis.

REFERENCES:
patent: 2993104 (1961-07-01), Zimmer
patent: 3587011 (1971-06-01), Kurz
patent: 3768051 (1973-10-01), Kurpanek
patent: 3789333 (1974-01-01), Kurpanek

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