Means for controlling electromagnetic device having hermetically

Details Means for controlling electromagnetic device having hermetically Means for controlling electromagnetic device having hermetically

1975-09-29

1977-09-06

Harris, George

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

H01H 4736

Patent

active

040472370

ABSTRACT:
The invention relates to hermetically sealed contacts, electromagnetic devices using such contacts, as well as method and means for controlling such electromagnetic devices.
A hermetically sealed contact (reed switch), comprising a capsule enclosing at least two peripheral elastically mounted magnetically controlled cores permanently anchored in the ends of the capsule and a central elastically mounted magnetically controlled core at least partially overlapping the peripheral ones and secured in a supporting member arranged in the capsule intermediate of the inner ends of the peripheral cores, is, according to the invention, characterized by that the supporting member is made elastic and the elasticity thereof is less than the transverse elasticity of the central magnetically controlled core, the latter being secured symmetrically with respect to the elastic supporting member so that when a magnetic flux is applied to the cores, it gives rise to an electromagnetic force of attraction between the magnetically controlled cores, and the central core comes in or out of contact with one of the peripheral cores.
The electromagnetic device of the present invention uses the hermetically sealed contact (reed switch) described herein above and comprises at least one magnetizing coil arranged externally of the capsule and connected to a power supply.

REFERENCES:
patent: 2264124 (1941-11-01), Schreiner
patent: 2834848 (1958-05-01), Ellwood
patent: 2905784 (1959-09-01), Ducati
patent: 3325685 (1967-06-01), Hoel
patent: 3359463 (1967-12-01), Jones, Jr.
patent: 3445729 (1969-05-01), McNulty

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