Appeal No. 1997-0281 Page 4
Application No. 08/351,874
13. A capacitive discharge ignition system
responsive to a power source for igniting fuel to
power a turbine engine, the system comprising: a
capacitive energy storage device; power conditioning
circuitry responsive to the power source for pumping
approximately two joules or more of energy into the
capacitive energy storage device; an igniter plug
for igniting the fuel; output circuitry for
delivering the energy from the energy storage device
to the plug; a passive network having only two
terminals which connect the network to the
capacitive energy storage device and the output
circuitry for completing a path discharging the
capacitive energy storage device into the igniter
plug; the passive network comprising (1) a solid-
state switch for alternately providing high and low
impedance paths between the two terminals, thereby
selectively discharging the capacitive energy
storage device into the output circuitry and the
igniter plug, and (2) a breakover diode responsive
to a predetermined value of a voltage differential
()V) between the two terminals for effecting the
switching of the path between the two terminals
provided by the solid-state switch from a high
impedance value to a low impedance value, thereby
controllably discharging the capacitive energy
storage device into a spark gap of the igniter plug
by way of the output circuitry.
Besides the appellant‘s admitted prior art (AAPA), the
references relied on in rejecting the claims follow:
Roberts 3,349,284 Oct. 24, 1967
Hirosawa et al. 3,367,314 Feb. 6, 1968
(Hirosawa)
Wolf et al. 4,449,497 May 22, 1984.
(Wolf)
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007