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Primary Examiner: Sloyan, Thomas J.
Assistant Examiner:
Attorney: Weingarten, Maxham & Schurgin

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Title: Photoelectric control circuit for digital magnetic compass

Abstract: For use in an electro-optically sensed magnetic compass a photoelectric control circuit in which the duty cycle of the illumination source is varied to energize the source only until a valid electrical output signal is detected.

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Inventors: Fowler, John T. (Winthrop, MA, US)

Application Number: 495849
Filing Date: 1974-08-08
Publication_date: 1976-03-16
Assignee: The Laitram Corporation (New Orleans, LA)
Primary Class(es): 250/205 250/231.18
Other Classes:
US Patent Ref:

3746842

Jul, 1973

Fowler

340/347.

Other Refs: Other References: IBM Technical Disclosure Bulletin, Thomas et al., "Digital Feedback Light-Emitting Diode Control," 1/1974, Vol, 16, No. 8, pp. 2598-2600.