The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 1985
Filed:
Feb. 22, 1983
David E Steffen, Chatham, IL (US);
DICKEY-john Corporation, Auburn, IL (US);
Abstract
A circuit is provided for a seed sensor which includes a light source and a light responsive element respectively positioned along a path of travel of seeds for producing a momentary change in signal level from the light responsive element in response to a momentary change of level of light incident thereupon from the light source due to the passage of one or more seeds therebetween. In accordance with the invention, the circuit comprises a pulse-producing circuit responsive to the change in signal level from the light responsive element for producing a discrete pulse signal in response to each change in the direction of the change in signal level. Predetermined ones of the discrete pulse signals are selected for counting.