Superconductive gravimeter

Details Superconductive gravimeter Superconductive gravimeter

1990-02-23

1991-04-30

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Superconductive type

335222, 73382G, H01F 722

Patent

active

050122169

ABSTRACT:
A superconductive gravimeter comprises a spool (12, 14, 16) and a circumferential magnet (20, 22, 24), both of which are covered with superconductive material (48, 52, 58, 60) except at the magnetic field gaps (54, 56, 62, 64) between them. A force rebalance coil (28, 30) lies in these gaps and supports a superconductive plate (70) above them. Leakage flux flows through the space between the plate and the circumferential magnet. Variations in gravity result in variations in the weight of the plate, resulting in variations in the height of the space, resulting in variations in the flux in the space, which are detected by a pick up coil (74).

REFERENCES:
patent: 3629753 (1971-12-01), Kawabe et al.
patent: 4910486 (1990-03-01), Yumura et al.

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