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:
Jan. 26, 2016
Filed:
Dec. 19, 2011
Michael J. Hayes, Collinsville, CT (US);
Laura B. Hayes, Collinsville, CT (US);
Mark I. Jurras, Canton, CT (US);
Michael J. Hayes, Collinsville, CT (US);
Thomas A. Hoopes, Sandy, UT (US);
Mark I. Jurras, Canton, CT (US);
DYNO NOBEL INC., Salt Lake City, UT (US);
Abstract
An ignition circuit () includes: an igniter () having first () and second () terminals; a first diode () electrically connected in series with the igniter at the first terminal; a second diode () electrically connected in series with the igniter at the second terminal. The first and second diodes each have an anode terminal () and a cathode terminal (), wherein like terminals of the first and second diodes are electrically connected to the igniter, thereby defining proximal terminals and distal terminals. A capacitor () is electrically connected across the distal terminals and connectable in parallel with a series-connected energy source () and switch (). The energy source and a switch are electrically connectable across the distal terminals via test lead wires. Current flow through the igniter sufficient to ignite the igniter is prevented until an ignition voltage is applied to the distal terminals that is equal to or greater than the reverse breakdown voltage of the first diode or the second diode.