Magnetometer
Patent 5189368 Issued on February 23, 1993. Estimated Expiration Date: 
February 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3129410 3500176 3526002 3750008 InventorAssigneeApplicationNo. 726367 filed on 09/24/1976US Classes:324/304, Using optical pumping or sensing device102/417, Magnetic324/301Using a magnetometerExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmInternational ClassG01V 003/00AbstractA magnetometer is desclosed in which a gas cell containing atomic vapor is pulse pumped at one of the transitions of the gas in the cell. After the pulse has passed through the gas cell, thereby causing alignment of all the individual atomic moments along the propagation direction of the pulse, a probe beam reads out the Larmor precession frequency of the freely precessing atoms in terms of the frequency of the amplitude modulation of the probe beam caused by the free precession within the gas cell. The system is suitable for laboratory measurements of the absolute value of a magnetic field and for packaging in an expendable battery powered water-born buoy becuase of the low power consumption of the subject system.Other References
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