Polarized electromagnetic relay with magnetic latching for an el

Details Polarized electromagnetic relay with magnetic latching for an el Polarized electromagnetic relay with magnetic latching for an el

1985-11-04

1987-04-21

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

335179, 335180, H01F 708

Patent

active

046600124

ABSTRACT:
The invention relates to a polarized electromagnetic relay with magnetic latching and sliding armature.
The magnetic circuit comprises a tubular frame enclosed by two flanges (22, 24), a permanent magnet (14) with axial magnetization fitted between one (22) of the flanges and a flux-diverter (26), and a cylindrical trip coil (30) mounted on a bushing inside the frame (20). The other flange (24) is fitted with a tubular sleeve (46) made of ferromagnetic material coaxially surrounding a part of the moving armature (16) with a uniform radial air gap (jl) interposed. The axial overlapping distance (L) of the armature (16) by the sleeve (46) in the latched position of the relay (10) is greater than the thickness (11) of the flange (24) and/or than that of the frame (20).

REFERENCES:
patent: 3755766 (1973-08-01), Read
patent: 3792390 (1974-02-01), Boyd
patent: 3886507 (1975-05-01), Johnston et al.
patent: 4072918 (1978-02-01), Read
patent: 4462013 (1984-07-01), Ueda et al.

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