Electromagnetic switching device
AssigneesSDS-Elektro GmbH, Matsushita Electric Works, Ltd.
InventorSepp Antonitsch
Life of this patent
Estimating the term…
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.
Claims59
An electromagnetic switching device comprising
- a. a bobbin with a coil mounted thereon, said bobbin forming a protective tube with a contact chamber at each end thereof and defining a longitudinal axis,
- b. said bobbin having embedded in it a plurality of terminals connected to said coil, pole shoes, and contact terminals connected to said pole shoes,
- c. an armature disposed in said tube having two free end portions each coated with contact material and each facing an end portion of at least one said pole shoe coated with contact material and extending from a wall of a respective said contact chamber, and
- d. at least one permanent magnet mounted between flanges of the bobbin at each end of the tube,
- e. said magnets and pole shoes being disposed symmetrically in relation to said longitudinal axis and at least one further axis perpendicular to said longitudinal axis.
Dependencies are inferred from the claim text.