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:
Apr. 10, 2001
Filed:
Jan. 07, 1999
James W. Oram, Charlotte, NC (US);
Alan M Schulman, Highland Park, IL (US);
Glentronics, Inc., Glenview IL, US;
Abstract
A system for simulating the lighting cycle of the sun obtains a set of inflection points on a solar lighting cycle and also obtains the annual minimum sunlight value for a location at a predetermined latitude; reconstructs the daily and yearly solar cycle based about the set of inflection point and the minimum yearly value; determines the lighting period based upon the daily and yearly cycles; activates a lighting device for the determined lighting period; transmits a series of electrical pulses to the soil and receives a return signal from the soil, the return signal indicative of the conductivity of the soil; determines whether the conductivity indicates whether the soil has an adequate moisture level; and activates an LED to indicate the soil does not have an adequate moisture level.