Title: Controlling device for grinding piezo-electric element

Abstract: A device for controlling the grinding of a piezo-electric element is designed to convert the frequency of an electric signal produced with grinding of a piezo-electric element into a lower frequency, using frequency converters and a local oscillator and then to select, by means of filters, a frequency generated from the frequency converters at the time when a desired grinding of a piezo-electric element has been obtained so as to bring the grinding operation to a stop in response to the selected signal.

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Other info:

Inventors: Moritani, Nakanobu (Tokyo, JP)

Application Number: 818325
Filing Date: 1977-07-22
Publication_date: 1979-02-06
Assignee: Kabushiki Kaisha Seikosha (JP)
Primary Class(es): 451/6
Other Classes:
US Patent Ref:

2340843	Feb, 1944	Bailey	51/165.
3097458	Jul, 1963	Richmond	51/165.
3579922	May, 1971	Mandonas	51/165.
3691695	Sep, 1972	Green	51/165.
4063910	Dec, 1977	Huguenin	51/165.

Other Refs:
Primary Examiner: Whitehead, Harold D.
Assistant Examiner:
Attorney: Burns; Robert E., Lobato; Emmanuel J., Adams; Bruce L.