Apparatus having floating magnet unit with light reflecting mirr

Details Apparatus having floating magnet unit with light reflecting mirr Apparatus having floating magnet unit with light reflecting mirr

1990-05-02

1991-07-02

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Combined

324 97, 324228, 324259, 324262, 340551, G01R 3312, G01R 3300, G01R 1338, G08B 1324

Patent

active

050292757

ABSTRACT:
A detector of ferromagnetic materials having a permanent magnet floating in a contaier and restrained under the influence of a soft ferrite mass spaced below it to rotatable movement about a vertical axis centrally of the container. The magnet has a normal at rest position from which it is rotatable when a ferromagnetic material moves through its magnetic field. The magnet carries a curved mirror onto the concaved face of which a light beam is focused, and which beam in an at rest normal position of the magnet is reflected by the mirror onto a zero point of an observer's readout scale. When the magnet is caused to rotate from its at rest position by a ferromagnetic material moving through its magnetic field, the light beam is caused to move away from the zero point; and when the ferromagnetic material has moved out of the magnetic field, the magnet and light beam return to their normal positions but with some oscillation before doing so. Electro-magnets associated with the magnet are subject to energization by an attendant, and when energized they serve to curb such oscillation.

REFERENCES:
patent: 2151627 (1939-03-01), Vacquier
patent: 2319529 (1943-05-01), Britten, Jr.
patent: 3276030 (1966-09-01), Stauffer
patent: 3423672 (1969-01-01), Stockton
patent: 3508142 (1970-04-01), Filloux
patent: 4156178 (1979-05-01), Stockton
patent: 4848002 (1989-07-01), Carmona et al.

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