Abstract: The invention relates to a chamber for the detection of leaks on foils (1). Said chamber comprises two frames (2, 3) which are connected together in an articulated manner, foils (4, 5) which are mounted on said frames, a test chamber (8) composed of the foils, a seal (12, 13, 18) arranged between the frames and at least one bore hole (7), preferably several bore holes, in at least one of the two frames (2, 3), which can be connected to the inlet of a vacuum pump (15, 16, 22). In order to improve the chamber's closing features, said chamber comprises an edge zone (14) wherein a vacuum can be created independently of the test chamber (8) and into which said bore holes (7) open out.

Abstract: Devices and methods for protecting components of imaging devices are provided. In the illustrative embodiment, a plano-concave protective cover is provided which is bonded to an imager window by applying a thick, quick-setting adhesive to the exterior of the cover and of the imager window.

Abstract: The invention relates to a method for operating a film leak indicator (1) comprising two films (5, 6), which are each tensioned inside a frame (3, 4) and which delimit a testing space (80) when a test piece (79) is introduced. In addition, said film leak indicator is equipped with two vacuum pumps (13, 20). According to the invention, the testing space (80) is firstly evacuated and the film leak indicator is switched over to a leak search mode after the evacuation is completed. In order to prevent the search for leaks from being impaired by fluctuating helium concentrations in the ambient air, the invention provides that, before starting the leak search process, the helium concentration of the ambient air is measured and this measurement is taken into account during subsequent leakage measurements.

Abstract: The present invention is an imaging device which in one embodiment is equipped with decode functionality and is configured to operate in at least one of four user selected modes. In a first, “message only” mode, the device stores into a designated memory location a decoded-out message corresponding to a decodable indicia. In a second, “image only” mode, the device stores into a designated frame storage memory location an image representation of a scene. In a third, “image plus message” mode the device stores into a designated frame storage memory location an image representation comprising a representation of a decodable symbol and into the same or other memory location the decoded-out message decoded from the decodable indicia, or data corresponding to the same.

Abstract: An air filter cabinet designed for a relatively large electronic air filter cells is adapted to receive and position a relatively smaller filter element without an associated loose fitting relationship and air leakage. A plurality of S-shaped adaptor elements are each removably interconnected to a respective guide rail in the cabinet to reduce the size of a cavity so as to accommodate the smaller filter element and secure it in a fixed position while preventing air leakage therearound.

Abstract: The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of light rays into an eye, wide field retinal illumination, reduced glare and reduced power consumption. The aperture stop blocks unwanted received glare light not forming part of the retinal image. The device is made especially well suited for retinal viewing through an undilated pupil if the aperture is sized in accordance with the diameter of an undilated pupil.

Abstract: The present invention provides an over-voltage surge protection device comprising a printed circuit board having a signal carrying conductive member having a plurality of nodes positioned therealong, and a conductive member running to ground also having a plurality of nodes positioned therealong. The nodes on the signal carrying member and ground member extend along a common path with corresponding ones of the signal carrying nodes positioned in adjacent, but spaced relation to the ground nodes. The peripheral edges of the nodes accumulate and discharge transient high voltage surges. Preferably, the nodes are shaped in the form of triangles due to this particular geometry's favorable ability to accumulate and discharge voltage, but may be formed in a variety of geometries.

Abstract: An air conditioning module having all the necessary components for conditioning air, is so sized and arranged that when placed in an internal compartment of a bus, has its respective openings register with an existing return air duct and a supply air duct on the bus. The compartments and modules are so arranged that they can be paired in back-to-back relationship, with one on each side of a longitudinal center line of the bus. Each of the modules has an intermediate partition dividing the module into an upper evaporator section and a lower condensing section. A mixer flap is placed in an intermediate position with respect to the partition such that its position may be selectively adjusted to thereby vary the amount of fresh air and return air that is passed through the condenser coil and evaporator coil, respectively.

Abstract: A module for a bus rooftop air conditioner is self contained in that it has all the necessary components including a compressor, if desired, which when supplied with electrical power, can provide conditioned air to the passenger compartment of a bus. In addition, an electrically powered heater is provided in the air flowstream such that heated air can also be supplied to the passenger compartment when desired. Multiple units provide for incremental capacity requirements to be met as well as limp home capabilities.

Abstract: A system for capturing and neutralizing HAP's (hazardous air pollutants) and VOC's (volatile organic compounds) at the source point by providing a closed loop remediation system which utilizes an air collection, treatment and control module containing a predetermined size bay of multiple interchangeable mini-biofilter cartridges that function to consume the pollutant and recirculate remediated air back to the source point of the pollutant. The system includes establishing a closed loop air system at a work station which generates and emits VOC's, capturing the VOC's in the air stream flow and transporting them directly into an adjacent biofilter module which contains selected microorganisms in mini-cartridges which biodegrade said VOC's and recirculates remediated air back to the source point of the pollutant.

Abstract: An enclosed mobile container having a refrigeration unit for providing conditioned air to a mixing chamber located at the front of the container. Air penetratable cartons containing perishable produce are stacked in rows along the length of the container to create a pair of supply air plenums running along each side wall of the container and a return air aisle running along the center of the container. A gas generator is mounted in the mixing chamber to add a ripening agent to the conditioned air. Fans force the supply air from the mixing chamber into the plenums under pressure so that the supply air is passed through the cartons into heat transfer relationship with the produce and the air is returned to the mixing chamber via the center aisle. A fresh air exchanger is mounted in the container for venting the ripening agent to ambient after the completion of a ripening cycle.

Abstract: A multiple blade centrifugal cutting machine having a planetary gear system for coordinating the motion of the blades so that the blades move into the work at the same speed to an equal depth to either sever the work element or strip away one or more layers of coating from the core of the work element.

Abstract: A bus air conditioning system with at least one air conditioning module installed on a bus roof. The air conditioning system having a pair of supply air openings for conducting the flow of conditioned air downwardly near the outer side of the roof and a return air opening whose position may vary substantially in the lateral direction from a longitudinal central axis of the bus for any given installation. The air conditioning system including a refrigeration circuit for circulating refrigerant serially through a compressor, a condenser coil, an expansion valve and an evaporator coil. The air conditioning system further including an evaporator section including an evaporator blower for causing return air to flow from said return air opening, into a return air compartment of the evaporator section, through the evaporator coil and then to the supply air opening. The air conditioning system further includes a condenser fan for causing outside air to flow over the condenser coil and then to be discharged outside.

Abstract: A method for improving the fluid dispense rate in a metering system utilizing speed includes the steps of modifying the fluid flow rate profile during a portion thereof so as substantially increase or decrease the speed of the motor during certain portions of a metering cycle in order to improve the efficiency of the metering system. For a variable speed pump producing a sinusoidal speed profile, the pump motor speed can be increased to increase the dispense velocity during the beginning and end of the dispense phase to reduce perfusion and improve metered volume precision or a motor speed profile can be applied which is inverted relative to that of the variable speed pump to produce a constant velocity flow. Alternately or in addition to the above, the home position of the variable speed pump can be shifted to produce fluid velocity during the entirety of a dispense portion of a metering system cycle.

Abstract: A heat pump having an indoor coil that operates as a condenser when the system is in a heating mode and an outdoor coil that operates as an evaporator when the system is in the heating mode. A variable speed indoor fan is used to move supply air over the indoor coil and a temperature sensor is arranged to provide ambient outdoor temperature data to a programmable computer. The computer contains a schedule for continuously adjusting the speed of the indoor fan in response to changes in the ambient temperature so as to maintain the temperature of the supply air at a constant level. In doing so, the compressor discharge pressure is also maintained within allowable limits and is held substantially constant.

Abstract: A de-icing and anti-icing composition in the form of an aqueous solution which includes a carbohydrate, a freezing point depressant and an anti-corrosion agent in the form of phytic acid and its salts.

Abstract: A novel method for analyzing the pulse train resulting from a scanned beam particle monitor is described. The method enhances signal-to-noise ratio and significantly reduces particle false alarm rate. Performed in the time domain, the method filters noise pulses that do not occur at the scanner frequency. The analysis further identifies particle-pulse-envelopes (PPE's) by performing a forward-looking and backward-looking autocorrelation. Gaussian fits are subsequently applied to identified particle-pulse envelopes, to determine particle characteristics, such as size and speed.

Abstract: An apparatus for measuring an operating parameter of a relay armature operating a pair of relay contacts, and for controlling the voltage that occurs between the pair of relay contacts when they open or close. The apparatus includes a microcontroller that senses a reference voltage, and a sensed voltage signal that comprises a voltage component representing a relay coil voltage, a power supply voltage component, and a voltage component induced by a motion of the armature. The microcontroller uses discrete digital samples of the signals to deduce the operating parameter. The microcontroller provides a control signal to cause the relay to open or close the relay contacts at a time when a predefined voltage occurs therebetween. The predefined voltage can be substantially zero volts. Methods of use of the apparatus to control the opening and closing of relay contacts are described.

Abstract: An organizer for filing loose sheets of material in an orderly manner that includes an open top housing having a pair of opposed parallel rails extending along the length of the housing. At least one frame assembly supported upon the rails that contains hangers upon which a plurality of sheet receiving envelopes are suspended. A slide closure is mounted upon the frame which can be moved from an open position wherein the envelopes can be removed or replaced on the fasteners and a closed position wherein the envelopes are prevented from being dislodged from the frame.