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:
Dec. 27, 1994
Filed:
Oct. 19, 1992
Stephen Kaylor, Boca Raton, FL (US);
Gordon Yowell, Boca Raton, FL (US);
Predator Systems Inc., Boca Baton, FL (US);
Abstract
A control system for an electromagnetic device prevents overheating of the coils to permit optimizing design parameters without the need for excessive safety factors. A pull coil circuit feeds a high current to pull windings for a preset time interval after receipt of an initiating voltage. A hold coil circuit feeds a holding current to holding windings with a reduced flux after receipt of an initiating voltage only if it exceeds a preset voltage threshold. The hold current is cut off when the initiating voltage falls below a preset threshold. The pull coil circuit is rendered inoperative for a preset time interval after current is discontinued to ensure adequate cooling between operations.