Abstract: The invention provides an insect trap including a housing having located therein a gas bottle or container, one or more modulators having a viscous medium to produce a pulsed flow of gas and a capillary tube interconnecting the gas bottle or container and a respective modulator; a conduit assembly interconnecting a modulator at one end and connectable to a gas bottle or container at another end; an attachment body for attachment to a gas bottle or container; and a method of producing a pulsed flow of gas from a container or source of said gas.

Abstract: The invention resides in an insect trap (10) comprising a housing (14) which has one or more access apertures (19) to permit entry of insects into a hollow interior (19B) of the housing (14) and a catchment tank (20) located below the one or more access apertures (19) for trapping of insects characterized in that there is provided an air diffuser (30) above one or more access apertures (19) and an air blower (37) or fan located adjacent to the air diffuser (30) for generating circulating air within the housing (14). Circulating air is then confined mainly to the housing interior (19B) and does not escape through the access apertures (19).

Abstract: The invention resides in an insect trap (10) comprising a housing (14) which has one or more access apertures (19) to permit entry of insects into a hollow interior (19B) of the housing (14) and a catchment tank (20) located below the one or more access apertures (19) for trapping of insects characterised in that there is provided an air diffuser (30) above one or more access apertures (19) and an air blower (37) or fan located adjacent to the air diffuser (30) for generating circulating air within the housing (14). Circulating air is then confined mainly to the housing interior (19B) and does not escape through the access apertures (19).

Abstract: A process for the catalytic oxidation of a hydrocarbon gas comprising the steps of releasing pulses of a compressed hydrocarbon gas into an expansion chamber (8) and passing the expanded hydrocarbon gas over a catalytic converter (11) to oxidize the hydrocarbon gas.

Abstract: A modulator (10, 10A) for changing a constant flow of gas to a pulsed or intermittent flow of gas, said modulator (10, 10A) including a housing component (11) and an insertion tube (15) for insertion into a hollow interior (16) of the housing component (11) wherein after insertion of the insertion tube (15) into the housing component (11), gas is generated either in situ within the hollow interior (16) of the housing component (11) and be caused to flow out of an outlet (23A) of the modulator (10, 10A) in pulses or alternatively gas is passed into the insertion tube (15) in a constant flow and upon reaching the hollow interior (16) of the housing component (11) is released therefrom through the outlet (23A) in a pulsed flow.

Abstract: A gas adaptor (10) adapted in use to reduce the pressure of a gas or flow rate of a liquefied gas, said gas adaptor (10) having means (14) for connection to a gas source; an adaptor body (13, 13A) having an internal bore (22) in which is located a ceramic insert (27); and a capillary tube or passage (24) in fluid communication with the internal bore (22) wherein in use the gas or liquefied gas is caused to flow through the internal bore (22) of the adaptor body (13, 13A) and through the ceramic insert (27) and subsequently through the capillary tube or passage (24).

Abstract: A process for the catalytic oxidation of a hydrocarbon gas comprising the steps of releasing pulses of a compressed hydrocarbon gas into an expansion chamber (8) and passing the expanded hydrocarbon gas over a catalytic converter (11) to oxidize the hydrocarbon gas.

Abstract: A container (10) for holding a supply of compressed fluid such as carbon dioxide has a length of tube (12) formed into a multi turn helical coil (14). A first valve (16) is provided at the lowest end (18) of the coil (14) for controlling the flow of fluid out of the container (10). A thermal insulating setable foam (20) envelopes the tube (12) and coil (14), though not the valve (16) which is disposed outside of the foam (20). A strap (26) extends about the coil (14) to bind the turns of the coil (14) together for added safety and strength. Coil (14), and setable foam (20) are disposed within a heat insulating housing (28). Inlet valve (22) is attached to an upper end of the tube (12) proximate the highest one of the turns of the coil (14).

Abstract: An apparatus for providing a continuous slow release of compressed gas includes a pressure vessel and a restrictor tube. The restrictor tube has a first open end located inside the pressure vessel and an opposite second open end located outside the pressure vessel. The restrictor tube has a small diameter so as to restrict the flow of gas therethrough and out of the pressure vessel. The pressure vessel is connected to a supply of compressed gas via a valve. When a volume of gas is transferred to the vessel, the gas enters the first opening, travels through the restrictor tube and out of the second opening to provide a slow continuous release of gas. In one embodiment, the pressure vessel is incorporated in an insect trap.

Abstract: A refrigeration system (12) is comprised of three expansion units (19A, 19B, 19C), with each having an expansion chamber (22) and three secondary chambers (24, 26 and 28), connected to a supply (16) of compressed refrigerant. The expansion chamber and secondary chambers are formed with progressively reducing volumetric capacity. The end of each of the the secondary chambers, is connected to a common bleed tube (29) having a bleed hole (34) for venting the refrigerant. The bleed hole opens to the outside of a housing (15) which houses the expansion units. The interior of the housing (15) is filled with a gel which changes state from a liquid to a solid at a predetemmined temperature. A valving arrangement (32) connects the expansion units to a supply of compressed refrigerant. The housing (15) together with a supply (16) refrigerant can be installed into a cooling box for cooling the space within the cooling box.