VACUUM TORSION MICROBALANCE
PICATINNY ARSENAL DOVER N J FELTMAN RESEARCH LABS
Pagination or Media Count:
IN WORKING WITH A MANOMETER FOR VERY LOW PRESSURES, THE NECESSITY OF MEASURING FORCES OF THE ORDER OF FROM 10 TO 110 MG AROSE. An instrument based on the principle of the torsion balance was used for this purpose. A torsion balance with a quartz wire 25 microns in diameter was used its error for suspending hanging weights of 10 mg and more does not exceed one percent. In making use of a torsion balance for measuring force, it should be kept in mind that the bal-ANCE BEAM IS NOT TO BE LOADED WITH PARTS HAVING SIGNIFICANT WEIGHT. The torsion microbalance developed for the above purpose differs from those known through the literature on the subject in that instead of using the torque of the extremity of the wire, the magnetoelectric compensation of the torque of the load is used, and the value to be measured appears as the current strength in the compensating coil.