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:
Jul. 16, 1991
Filed:
Nov. 16, 1989
Paul A Taylor, Heston, GB;
Kidde-Graviner Limited, Debry, GB;
Abstract
A circuit arrangement for electrically firing a load, such as the rocket motor of a projectile, at a predetermined time after it has been ejected from a predetermined path (such as the barrel of a gun) comprises a capacitor which is charged up through bore-rider contacts sensing ejection of the projectile, a resistor and two diodes. A further diode blocks a capacitor discharge path in which the load is connected. Closure of the bore-rider contacts initiates two timers. These are of different type, so as to minimize the risk of double failure, and have the same predetermined time period. At the end of this period, they respectively close switches which abruptly shifting the potential on the positive plate of the capacitor to zero. The diode 32 in the capacitor discharge path is now unblocked and discharge current passes through the load and fires it.