Abstract: A bleed valve assembly which includes a bleed valve seat having a bleed orifice partially defined thereby and a piezoelectric crystal mounted adjacent thereto so that upon bending of the crystal, as by energization thereof, pressure contact is made with an intermediate valve element. The valve element is in turn adapted to move against the bleed valve seat to close the same. When the bleed valve assembly is closed in the manner above described, pressure is permitted to build up in the orifice to modify the position of a main valve with which the bleed valve assembly is utilized. In addition the crystal is beam mounted within a bore in which the valve seat is positioned and essentially in contact with said bore solely at spaced peripheral edge positions thereof.

Abstract: A valve which is normally biased in a first operative position is provided with control means including a first pressure fluid orifice for directing such fluid to a control member for changing the operative position of the valve. The device further includes a housing which communicates with said first orifice and which has a bleed orifice assembly having a second or bleed orifice. The bleed orifice assembly further includes a bleeder valve seat and a piezoelectric crystal mounted adjacent thereto so that upon bending of the crystal, as by energization thereof, pressure contact is made with an intermediate valve element. The valve element is in turn adapted to move against the bleeder valve seat to close the same. When the bleed orifice assembly is closed in the manner above described, pressure is permitted to build up in the first orifice to activate the valve.

Abstract: An improved flueric cartridge initiator (FCI) comprising a heat resistant or composite material resonance tube, a hardened high strength thermal disk and copper seals, in combination with an ignition train is made safe utilizing specific fluid dynamic phenomenon associated with the operation of the resonance tube. The present device uses simultaneous dual fluid inputs to create a Boolean AND logic element in order to reduce inadvertent firing functioning of the FCI.

Abstract: A flueric cartridge initiator comprising a heat resistant or composite maial resonance tube, a hardened high strength thermal disk and copper seals, in combination with an ignition train comprising potassium dinitrobenzfuroxane initiating charge, a double-base flake propellant transfer charge, and an extruded multi-perforated main charge propellant.

Abstract: A flueric initiator for a fuel-air explosive bomb possesses a sealed hous containing a pressurized gas, a plurality of igniter devices and a means for rupturing the housing and ejecting the igniter devices into the atmosphere. Each igniter device consists of a small gas container, a resonance tube, and explosive charge adjacent to the closed end of the resonance tube, and a nozzle connected to the gas container and communicating with the housing plenum through one or more vents. The housing is initially charged to a pressure considerably higher than the functioning pressure of the nozzle-resonance tube combination.

Abstract: An improved pneumatic match utilizes a vented conically shaped nozzle flare ositioned in a downstream region of a convergent nozzle to permit the match to be used in applications where fast functioning time is a necessity and where the fluid activating medium comprises a low helium pressure source or only high pressure air.

Abstract: A self-sealing fluidic explosive initiator utilizes a tapered sliding inner leeve, having a nozzle element, resonance tube and an explosive charge proximately disposed adjacent the resonance tube, to mate with a fitting sleeve for terminating a gas supply flow to the nozzle, and for containing the products of explosion of the initiator upon activation of the explosive charge. The initiation of the explosive charge is used to move a piston cutter valve.

Abstract: A flueric through bulkhead rocket motor ignitor in which a flueric thermal nergy generator is used to set off a pyrotechnic/explosive pickup charge that in turn sets off a donor pyrotechnic/explosive charge that transmits its energy through a thick metallic bulkhead that is utilized to maintain pressure integrity of a rocket motor, and the donor charge transmits its energy to a pyrotechnic/explosive pickup charge that in turn sets off a receptor charge that is utilized to ignite a solid propellant composition.