公开(公告)号：US3583226A

公开(公告)日：1971-06-08

申请号：US3583226D

申请日：1966-01-24

Applicant: GRAVIMETRICS INC

Inventor： CODINA JORGE G

IPC: G01V7/00 ,  G01R7/04

CPC classification number: G01V7/00

Abstract: A gravimeter employs a levitational magnetic field to suspend a magnetic body which is counterbalanced by the upward pull of the field and the downward pull of the gravitational force. As the force changes, the body moves incrementally up or down. An electrical feedback signal is used to restore the body to its original position. The signal thus increases or decreases with increases or decreases in the gravitational force and provides a means for obtaining a direct reading of the changes in the force as well as the rate at which the force is changing.

公开(公告)号：US3721984A

公开(公告)日：1973-03-20

申请号：US3721984D

申请日：1971-07-12

Applicant: GRAVIMETRICS INC

Inventor： CODINA J

IPC: G01R33/02

CPC classification number: G01R33/02

Abstract: A levitational magnetic field suspends a magnetic body in space and when shielded from the earth''s magnetic field, its upward pull and the pull of gravity are equal and opposite and the body is suspended. When unshielded, the electromagnet is additionally exposed to the earth''s magnetic field as well as to the levitational field and the body remains suspended. In both cases, an electrical signal dependent upon the intensity of the levitational field is produced. The difference between the value of this signal when the electromagnet is shielded and when the electromagnet is not shielded provides a measure of the intensity of the earth''s magnetic field.

Abstract translation: 悬浮磁场在空间中悬挂磁体，并且当与地球的磁场屏蔽时，其向上的拉力和重力的拉力相等并且相对于身体悬挂。 当非屏蔽时，电磁体另外暴露于地球的磁场以及悬浮场，并且身体保持悬挂。 在这两种情况下，产生取决于悬浮场强度的电信号。 当电磁体被屏蔽时和当电磁体不被屏蔽时，该信号的值之间的差异提供了地球磁场强度的测量。

公开(公告)号：US3664196A

公开(公告)日：1972-05-23

申请号：US5991970

申请日：1970-07-31

Applicant: GRAVIMETRICS

Inventor： CORDINA JORGE

IPC: H01J7/28 ,  C03B9/38 ,  C03B11/12 ,  F28D15/02 ,  F28D15/06 ,  G01P15/13 ,  H01J23/033 ,  G01P15/08

CPC classification number: G01P15/132

Abstract: An accelerometer for measuring the acceleration of a body in any direction with extremely high sensitivity and accuracy, utilizing a mass which is free to move incrementally in any direction but which is then returned to a stable position by means of a servocontrolled electromagnetic field.

公开(公告)号：US3480908A

公开(公告)日：1969-11-25

申请号：US3480908D

申请日：1968-05-16

Applicant: GRAVIMETRICS INC

Inventor： CODINA JORGE G

IPC: G01V1/18

CPC classification number: G01V1/181