The Singer Company

Robert M Hohenstein

William C Albert

Lincoln S Ferriss

A damping mechanism suitable for use with a vibrating beam accelerometer comprising a piezoelectric block mounted between the vibrating beam force transducer and the pendulum of the instrument. The proof mass, or pendulum, is mounted for pendulous motion about a pair of hinge means. Vibration of the instrument causes opposite charges to appear on electrodes which are on two opposite faces of the block. These charged electrodes are connected to each other by a resistor and so a current will flow through the resistance to neutralize the charge. The resistor will then dissipate the vibration energy as heat. This energy dissipation is effectively damping.

Piezoelectric damping mechanism

An electrostatic motor which is well suited for an electrostatic gyro rotor spin up, spin down system which provides positive starting at any rotor position, choice of clock-wise or counter-clockwise rotation, spin up and spin down modes with automatic coast and stop modes, choice of full speed along with having zero induced rotor voltage and non-displacemental force generation is shown.

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Glen Ridge, NJ, United States of America

Robert M Hohenstein