Title: Apparatus for cutting audio disks

Abstract: The disclosure applies to an audio recording apparatus which receives audio signals, generally from a tape recorder, and forms grooves in a spiral pattern on a recording disk. The apparatus typically includes a turntable for rotating the recording disk, a cutter for cutting grooves in the disk, and a cutter transducer for modulating the instantaneous position of the cutter as a function of the audio signals. An electromechanical subsystem is responsive to control signals for directing the unmodulated position of the cutter; i.e., its unmodulated radial position with respect to the center of the disk and its unmodulated vertical position or depth. In accordance with the invention, there is provided a system for automatically generating the control signals which control operation of the electromechanical subsystem. When no modification of the unmodulated radial position is called for, none is made, thereby eliminating wasteful pitch modifications.

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Inventors: Bottali, Louis J. (Ridgefield, CT, US)
Finger, Robert A. (Yonkers, NY, US)
Gravereaux, Daniel W. (New Canaan, CT, US)

Application Number: 835604
Filing Date: 1977-09-22
Publication_date: 1979-06-05
Assignee: CBS Inc. (New York, NY)
Primary Class(es): 369/47.37
Other Classes:
US Patent Ref:

2611038	Sep, 1952	Graham	179/100.
2738385	Mar, 1956	Bachman	179/100.
2792454	May, 1957	Redlich	179/100.
2792455	May, 1957	Redlich et al.	179/100.
2847514	Aug, 1958	Evans	179/100.
2948783	Aug, 1960	Scully	179/100.
2963556	Dec, 1960	Redlich	179/100.
3075052	Jan, 1963	Terry	179/100.
3223789	Dec, 1965	Ooms	179/100.
3850436	Nov, 1974	Rabe	274/42.

Other Refs:
Primary Examiner: Konick, Bernard
Assistant Examiner: McElheny, Jr., Donald
Attorney: Olson; Spencer E.