Abstract: A removable corner guard is provided. The removable corner guard is especially suitable for protecting the corners of, for example, control tables or tool boxes from deformations and from scratches. Further, the corner guard may be used as decorative addition to an otherwise plain control table or tool box. The device has a semi-rigid rubber housing which covers securing anchors having an internal skeleton. An extended ridge on a lower end of the corner guard locks the corner guard at the lower end of the edge of the control table. The corner guard may be adjusted to fit control tables or tool boxes of various sizes. A non-slip textured exterior surface may allow for the device to be easily transported.

Abstract: An RFID tag and a method for optimizing a Yagi-Uda antenna for a RFID inlay or integrated circuit is provided. The method has steps comprise: 1) selecting an electrically conductively first element; 2) generating an electrically conductive second element by taking a mirror image of the electrically conductive first element and trimming the second element; 3) generating a third element” along a line of axis of symmetry of the first two elements and on the opposite side of the first element as the electrically conductive second element; 4) adjusting the distance between the first three elements for optimum performance using Et(x)=EXP[a?x·b]+E?; and 5) optionally, if the electrically conductive first element does not contain an IC (integrated circuit) or RFID inlay, then adding an IC or RFID inlay adjacent to/or physically touching the electrically conductive first element along the line of symmetry.

Abstract: A passive, metal mount, UHF RFID tag with a high antenna efficiency is provided. The passive, metal mount, UHF RFID tag has a first securing surface and second securing surface which are both hinged at sides of a main body of the tag and which allow the tag to be secured to flat objects, round objects having various circumferences or to objects having unusual exterior surfaces. A pressure sensitive adhesive (PSA) tape secures the tag to the object. The tag allows the main body (or “form factor”) to be offset from a metallic asset which is tracked without the metallic object negatively interfering with the RFID. The metallic surface of the asset being tracked is used to activate the Patch antenna duality of the custom design inlay, thus increasing the radiation efficiency of the driven element (integrated circuit) and ultimately the read range.

Abstract: A passive, metal mount, UHF RFID tag with a high antenna efficiency is provided. The passive, metal mount, UHF RFID tag has a first securing surface and second securing surface which are both hinged at sides of a main body of the tag and which allow the tag to be secured to flat objects, round objects having various circumferences or to objects having unusual exterior surfaces. A pressure sensitive adhesive (PSA) tape secures the tag to the object. The tag allows the main body (or “form factor”) to be offset from a metallic asset which is tracked without the metallic object negatively interfering with the RFID. The metallic surface of the asset being tracked is used to activate the Patch antenna duality of the custom design inlay, thus increasing the radiation efficiency of the driven element (integrated circuit) and ultimately the read range.

Abstract: A removable corner guard is provided. The removable corner guard is especially suitable for protecting the corners of, for example, control tables or tool boxes from deformations and from scratches. Further, the corner guard may be used as decorative addition to an otherwise plain control table or tool box. The device has a semi-rigid rubber housing which covers securing anchors having an internal skeleton. An extended ridge on a lower end of the corner guard locks the corner guard at the lower end of the edge of the control table. The corner guard may be adjusted to fit control tables or tool boxes of various sizes. A non-slip textured exterior surface may allow for the device to be easily transported.

Abstract: The present invention generally relates to an RFID inventory and expiration date tag for an in-cabin airline metal chemical oxygen generator canister or other in-cabin assets (such as canisters) and a method of using the same. The tag is especially suitable for use in connection with metal oxygen or other gaseous metal canisters used in the aerospace industry. The RFID tag allows for the rapid, efficient, accurate, frequent and easy monitoring of the expiration date of the oxygen generator. The tag has a plurality of stacked layers including layers of polypropylene, polyester, UHF Inlay, fire retardant polypropylene and an acrylic adhesive. The tag extends directly outward from the generator at a tangent to approximately a ninety degree angle with respect to the generator.

Abstract: A pressurized supply of oil for lubrication and other purposes for a helical screw compressor is automatically and continuously maintained in an oil separator in the compressor discharge line by a check valve assembly which is controlled by the pressure differential between the compressor inlet and the condenser, a bypass around the valve's control element permitting equalization of pressure on its opposite sides to permit closing by a biasing element.

Abstract: An ice builder coil has two or more coil sections, one above the other, supplied with refrigerant from a low pressure receiver, each coil section having an individual vapor return line to the low pressure receiver, the flow through the lower coil section being controlled by an ice thickness sensor associated with the lower coil section.

Abstract: An oil separator, for use in the compressor discharge of a refrigeration system, has a turbine wheel on which refrigerant vapor impacts positioned within a vessel so that the oil is slung outwardly and impinges on the side walls of the vessel and the oil-free vapor is deflected 180.degree. to flow upwardly through the turbine wheel for discharge from the vessel.

Abstract: A flow control valve in a unitary casing has a seat for a manual stem valve on one side of the valve opening and a seat for a check valve on the other side, the check valve being lightly urged toward closing position against differential pressure in the flow stream and being receptive to external pressure control.

Abstract: An axial flow helical screw compressor with a slide valve and slide stop mounted end to end in communication with the intermeshing rotors has means for changing the volume ratio during operation by stepwise movement of the slide stop and for changing the capacity during operation in infinitely variable fashion, both in response to system operating conditions. In the event of interference between the movements of the slide stop and slide valve, the components are designed so that the movements of the slide stop overpowers that of the slide valve.

Abstract: Fragmentary water ice is produced in an enclosure by metering water into a flowing body of liquid refrigerant having a greater density than the water or ice, lifting the ice out of the refrigerant and through a zone of further cooling in which the adhering liquid refrigerant, itself, is cooled and drained from the ice, and discharging the ice through an opening in the enclosure.

Abstract: A variable volume ratio screw compressor has a side load inlet port for the injection of refrigerant vapor into the interlobe volume. In order to improve efficiency, overcompression and undercompression are avoided by varying the location of the radial discharge port to give the compressor an internal volume ratio matched to the pressure of the system in which the compressor operates. This is accomplished in the present application by locating a pressure sensing port no earlier than and preferably later in the compression than the side load injection port, but early enough in the compression that it will not communicate with the discharge port. The pressure that is sensed in the sensing port is used to predict the actual peak pressure in order that maximum efficiency may be obtained as a result of matching the internal volume ratio to the pressure ratio of the system.

Abstract: A method of cooling the oil in screw compressors equipped with automatic variable volume ratio by automatically relocating the proper ports for the injection of liquid refrigerant into the interlobe volume of the compressor in response to the instantaneous internal volume ratio so that the refrigerant injection is done at an optimum time to insure efficient use of the refrigerant.

Abstract: A method of operating an electric drive motor for an axial flow helical screw type compressor having a slide valve member and slide stop member mounted beneath the intermeshing rotors such that the slide member controls communication between the work chamber defined by the rotors and the casing to the outlet port and the slide stop member and the valve member together control the working fluid inlet to the bores of the rotor by sensing the drive motor current and full load operation of the compressor in order to incrementally adjust the slide members in opposite directions depending upon whether or not the motor current is increasing or decreasing to thereby continuously seek the position of the slide members at which such current is at a minimum.

Abstract: An axial flow helical screw type compressor has a slide valve member and slide stop member mounted end to end beneath the intermeshing rotors such that the slide valve member controls communication between the work chamber defined by the rotors and the casing to the outlet port and the slide stop member and the valve member together control the working fluid inlet to the bores of the rotors, the slide valve member and the slide stop being independently movable. Control means for the slide valve member and slide stop include position sensing means for these two members, inlet and outlet pressure sensing means, and means for feeding these inputs into programmable circuitry to control the positions of the slide member and slide stop.

Abstract: An axial flow helical screw type compressor has a slide valve member and a slide stop member mounted end to end beneath the intermeshing rotors such that the slide valve member controls communication between the work chamber defined by the rotors and the casing to the outlet port and the slide stop member and the valve member together control the working fluid inlet to the bores of the rotors, the slide valve member and the slide stop being independently movable. Control means for the slide valve member and slide stop include position sensing means for these two members, inlet and outlet pressure sensing means, and means for feeding these inputs into programmable circuitry to control the positions of the slide member and slide stop.

Abstract: An automatic variable volume ratio screw compressor has a plurality of ports for the injection of liquid refrigerant into the interlobe volume. These ports communicate with the interlobe volume at different effective distances from the discharge port so that the injection of liquid refrigerant may be done at the latest possible time during compression for effective use of the refrigerant, and without risking exposure to the open discharge port.The selection of the port is done automatically in response to the instantaneous internal volume ratio.

Abstract: A radial and thrust bearing mounting particularly adapted for a helical screw type compressor, is provided in which the radial load is isolated from the thrust load to prevent the thrust bearing from carrying any substantial radial load, and in which adjustment of the axial discharge end clearance between the faces of the rotors and the discharge end of the housing cover is provided.