Abstract: A portable security system comprising a control unit and one or more modular sensors adapted to detect the presence of various alarm conditions within a monitoring location. The control unit is operably connected to the modular sensors via sensor cables, and further comprises a portable housing allowing a user to easily transport and deploy the portable security system within a monitoring location. The control unit further contains an auto-dialer, which transmits an alarm call to an alarm recipient once the system detects the alarm condition. The housing may further have a storage compartment covered by a hingedly attached housing lid which stores the modular sensors when the system is not in use, allowing the user to transport the system in a unitary package.

Abstract: A shock tube apparatus may include a plenum to hold a volume of gas. The plenum may include a hollow chamber having a first end and a second end located opposite one another along a longitudinal axis, the first end of the chamber defining a shock egress opening. A valve assembly may be positioned at the first end of the chamber to seal the shock egress opening. A piston may be positioned within a recess located at the second end of the chamber. The piston may separate a first volume located between the piston and the first end of the chamber from a smaller second volume located between the piston and the second end of the chamber. A tension supporting rod may connect the valve assembly to the piston. A release valve may be in fluid connection with the second volume and a switch may be operable to open the release valve to release gas from the second volume and trigger opening of the valve assembly to generate a shock wave through the shock egress opening.

Abstract: High-power pressure wave source for generating pressure waves that can be repeated by igniting a combustible fluid mixture and by increasing its rate of combustion up to detonation. The high-performance pressure wave source has a channel, which expands toward one of its ends and forms a combustion chamber, a feed means for the components of the fluid mixture, and an igniting means in the area of the narrow end of the channel, a discharge means for the waste gas in the area of the wide end of the channel, and a membrane closing the wide end of the channel on the front side, as well as a plurality of vortex generators distributed over the length of the channel.

Abstract: A bird-scaring device for scaring birds without injuring the birds or without using loud noises. The bird-scaring device includes an air dispensing device. An actuator for actuating the air compressor is operationally coupled to the air compressor. A tubular membrane is elongate and has a first end, a second end and peripheral wall extending therebetween. The first end is selectively fluidly coupled to the air dispensing device such that the air dispensing device may inflate the tubular membrane. The peripheral wall of the tubular membrane has a plurality of elongate wires therein. Each of the wires is resiliently flexible. Each of the wires is coiled such that the tubular membrane is in a coiled orientation when it is not inflated. The air compressor forces air into the tubular membrane such that the tubular membrane is selectively inflated into an extended orientation.

Abstract: A pulsed combustion acoustic wave generator includes a tubular barrel having an inlet end and an open outlet end, a fuel controller for metering a controlled quantity of fuel into the inlet end of the barrel, an oxidant controller for metering a controlled quantity of oxidant into the inlet end of the barrel and an igniter extending into the inlet end of the barrel that is controllable by an operator to ignite a mixture of fuel and oxidant in the inlet end.

Abstract: A security dye pack disguised as a bundle of currency for deterring robberies includes a housing formed from a stack of currency bills sewn together and having a hallow chamber formed therein. A substrate disposed within the chamber has a flexible central region through which electrical conductors extend for making electrical interconnections between opposing ends of the substrate. Electrical components are mounted on both sides of the flexible central region to generate an actuating signal upon detecting removal of the security dye pack from the protected premises. Canisters containing dye or other active chemicals are secured at opposing ends of the substrate to emit dyed or other active chemicals in opposing directions when expended. The flexible central region of the substrate allows the security dye pack to be bent into a U-shape. Batteries are arranged in a side-by-side relationship in an elongated narrow case to facilitate bending of the security dye pack.

Abstract: A mobile, radio-controlled (RC) airplane flies around an airport in a random pattern, as controlled by an operator with a range greater than needed to scare away birds from runways. The RC airplane includes a receiver to control the launching of a special purpose cracker cartridge having a capsule which burns with a faint smoke trail for a predetermined period of time, after which the projected capsule explodes with a brilliant flash, loud noise, and a small cloud of smoke. By this technique, birds are actually chased out of the path of a runway at an airport. Further, this device can be used to scare birds from agricultural areas, as well as in military training exercises to simulate return fire from attacking aircraft or for use as scare shells during military or paramilitary field training. The cannon firing mechanism which launches the exploding capsule is controlled by a manually operated transmitter from the ground.

Abstract: An apparatus for repelling birds or beasts by exploding gunpowder automatically and repeatedly to make explosive sounds. The apparatus comprises a housing, a body plate on which most of other parts of the apparatus are mounted, an electric motor, a disk-like gear mechanically connected to the electric motor via reduction gears, a gunpowder striking hammer and a driving link, respectively, rotatably secured to the body plate and being actuated by the rotation of the disk-like gear, a gunpowder supply plate driven by the driving link, a gunpowder band winding spool, a bottom plate for placing the gunpowder band, and a switch assembly operated by the rotation of disk-like gear and electrically connected with a timer, a dry cell battery, and the electric motor.

Abstract: Chemiluminescent mixtures utilize mono and di-alkyl substituted 9,10-bis(phenylethynyl)anthracene derivatives to provide higher chemiluminescence efficiencies. The preferred fluorescers are 2-ethyl-9,10-bis(phenylethynyl)anthracene and 1,4-dimethyl-9,10-bis(phenylethynyl)anthracene.

Abstract: A sound engine comprising a firing chamber, an output horn, an igniter, a valve system, an electromagnetic control device, and a source of electrical signal impulses. The igniter is mounted about the firing chamber. The valve system is arranged generally adjacent the firing chamber for permitting the controlled separate introduction of fuel and air into the firing chamber. The valve means comprises a source of fuel, a source of air, a fuel shuttle valve, and an air valve. The fuel shuttle valve and the air valve are integrally connected. The electromagnetic control device is connected to the valving system for causing movement of the valving system in response to electrical signal impulses. The electromagnetic control device includes voice coils, magnetic field windings, and a housing. An output area occurs relative to the firing chamber to permit sound output from the firing chamber. The output area includes suitable mounting flanges for attaching horns thereabout.

Abstract: A device for scaring birds thereby aiding in the prevention of crop destruction due to the birds feeding thereon comprises in combination an actuator, such as an air gun which ejects at increased velocity a gaseous stream in a predetermined path, a frame including a target disposed in an impinging relationship to the gaseous stream path so as to be moved between rest and operative positions responsive to the gaseous stream, and visual scaring member operatively connected to the target for scaring birds, the visual member being reciprocally operable between inactive and active positions in response to the target being moved between the rest and operable position, respectively. According to another embodiment of the present invention, automatic controls are provided for disabling the device during night hours and/or during periods of increased wind velocities which could potentially damage the device.

Abstract: Solid materials having a flash point of less than 500.degree. C. are rendered fire alarming by providing for the presence thereon of micro capsules containing a bromofluoroalkane having a critical temperature of at least 100.degree. C., the micro capsules having an external diameter of from 200 to 260 microns, and the wall of the capsules consisting of a polymer, treated to release the bromofluoralkane suddenly at a predetermined temperature to provide a detonation having a maximum sound level of 10-12 kHz.