Appeal No. 2002-0343
Application No. 09/226,630
Claim 1 is the only independent claim on appeal, and it
reads as follows:
1. A fireset for a low energy exploding foil initiator
(LEEFI), the fireset comprising:
a first capacitor for storing a level of electrical energy
sufficient to fire the LEEFI, said first capacitor being in
electrical communication with the LEEFI;
second and third capacitors in electrical communication with
said first capacitor for storing lesser levels of energy than is
stored by said first capacitor;
a diode in electrical communication with said capacitors for
limiting charging of said second and third capacitors;
first and second resistors providing isolation among said
capacitors;
a trigger for directing a pulse of electrical energy;
a high speed switching transistor adapted to receive said
pulse of energy from said trigger, to dump said third capacitor;
a silicon controlled rectifier (SCR) having a gate portion
through which said third capacitor dumps, to short a first side
of said second capacitor to ground, to decrease the level of
energy stored by said second capacitor; and
a metal oxide semi-conductor field effect transistor
(MOSFET) in electrical communication with said second capacitor
and adapted to be turned on by energy from said second capacitor;
wherein said second capacitor discharges into a gate portion
of said MOSFET to turn on said MOSFET and dump said first
capacitor, thereby to fire the LEEFI.
2
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