Electrostatic measuring tuning fork and means for limiting mecha

Details Electrostatic measuring tuning fork and means for limiting mecha Electrostatic measuring tuning fork and means for limiting mecha

1991-10-07

1993-09-07

Wieder, Kenneth A.

Electricity: measuring and testing

Electrostatic field

Using modulation-type electrometer

84457, 310370, 331156, 333200, G01R 2912

Patent

active

052432920

ABSTRACT:
An electrostatic measuring apparatus for measuring unknowns such as the electrostatic potential of a surface in a non-contacting manner, including a tuning fork and a sensing electrode, and in which the frequencies of two different vibration modes of the fork are separated by a slotted supporting structure which is united with the fork, and in which harmful amplitudes of vibration of the fork are avoided by an amplitude limiting structure integral with the sensing electrode. The amplitude limiting structure includes arms extending around the ends of the tines.

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