Accession Number : AD0783387

Title :   Magnetic Suspension Balance.

Descriptive Note : Final rept. 15 Jun 71-15 Jun 74,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE DEPT OF PHYSICS

Personal Author(s) : Beams,Jesse W.

Report Date : 26 JUL 1974

Pagination or Media Count : 12

Abstract : The servo-controlled magnetic suspension balance was improved and simplified. It now weighs the freely suspended mass to at least one part in 1,000,000. The upward force exerted by the balance on the suspended body is strictly linear with the current in the control circuit over ranges in the order of 100,000 to 1,000,000. A number of applications of the balance are outlined. The servo-controlled magnetic torsion balance has been simplified and improved until the suspended body has no observable angular restoring torque when it is given an angular displacement. Also it has no observable friction per se from zero to maximum rotor speeds. When desirable a reliable restoring torque (over a wide range of values) can be built into the torsion balance. A few examples of the use of this device are mentioned. (Author)

Descriptors :   *Balances, Suspension devices, Magnetic devices, Measuring instruments, Control, Servomechanisms

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE