Miniature thermomagnetic relay

Details Miniature thermomagnetic relay Miniature thermomagnetic relay

1984-05-15

1985-03-12

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

Thermomagnetic

335146, H01H 5100

Patent

active

045048096

ABSTRACT:
A miniature latching thermomagnetic relay is disclosed which offers high contact forces, small size, and low cost. Ferromagnetic material is placed upon heaters in a low thermal conductivity substrate. A permanent magnet beneath the substrate attracts a moving element above the substrate. Contact points on the substrate and the moving element from electrical connections.
A control signal causes a heater to warm the ferromagnetic material, changing the saturation flux density of the material. This results in an unbalanced force on the moving element, causing it to rock about a pivot point to open or close connections as desired. Planar fabrication techniques may be used to construct the relay.

REFERENCES:
patent: 3760310 (1973-09-01), Carson
patent: 4414519 (1983-11-01), Anderson

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