Magnet for catching thereon foreign bodies within reticulum or r

Details Magnet for catching thereon foreign bodies within reticulum or r Magnet for catching thereon foreign bodies within reticulum or r

1987-09-15

1988-06-07

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

For magnetizing or demagnetizing

335302, 335306, H01F 1300

Patent

active

047499788

ABSTRACT:
A bar magnet and an instrument and method of manufacture thereof, in which the magnet is integrally formed of a single material and has circular magnetic poles at selected side portions thereof. The bar magnet is formed by snuggly fitting around an integral bar of magnetizable material, magnetic members of higher magnetic permeability than that of the magnetizable material of the integral bar, at a plurality of local locations along the length of the bar and applying a current to a coil surrounding the bar such that the bar is permanently alternately magnetized north and south axially along the sides of the bar. The coil extends axially up and surrounds the bar and metallic members, and is enclosed in a yoke. The bar magnet is applicable for use in extracting metallic substances from the stomachs of cattle.

REFERENCES:
patent: 3153177 (1964-10-01), McFadyen
patent: 3462720 (1969-08-01), Miyata
patent: 3512023 (1970-05-01), Anthony
patent: 3753183 (1973-08-01), Aspinwall et al.
patent: 3858134 (1974-12-01), Budd
patent: 4283698 (1981-08-01), Fujisawa
patent: 4494047 (1985-01-01), Schwalm

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