Abstract: A method for the compression of data applied to a system for the transmission of data in protocol data units between at least one emitter terminal and at least one receiver terminal. Each protocol data unit comprises a header field and a data field. A first sequence of N source protocol data units is associated with a second sequence of M protocol data units to be transmitted, M being smaller or equal to N. The data fields of the protocol data units transmitted comprise data that has been compressed (according to at least one compression algorithm). The data fields are then made up of data contained in the data fields that has been compressed, and also data allowing reconstruction of N source protocol data units.

Abstract: An improved gas turbine engine diagnostic system is disclosed which is particularly adapted for direct measurement of compressor performance, including efficiency and mass flow, for aircraft engines, without having to remove the engine form the aircraft. The system includes an instrumented compressor air discharge tube which has probes for total pressure, static pressure and temperature. The instrumented air discharge tube may be substituted for an existing air discharge tube for the engine to be tested, without having to remove the engine. Transducers attached to these probes provide signals which are connected to a data recorder or computer. Data can be taken as the engine is run, either on ground test or flight test. The total mass airflow output from the compressor stage for various engine performance settings can then be calculated using the static pressure, total pressure and air temperature measurements.

Abstract: A construction for a laminated card or label is provided including a transparent film having a pressure sensitive adhesive on one surface thereof and liner stock having first and second major surfaces. The first surface has a release coating adhered to the pressure sensitive adhesive on the film. Variable information may be printed on the second surface of the liner stock within the die cut area, and the die cut card removed from the transparent film and replaced printed side down onto the adhesive surface of the film, thereby laminating the card to the film. The card is then peeled away from remainder of the construction at the die cut around the film and folded with the indicia facing outward to laminate the sides the card together. The printed surfaces of the card are direct contact with the adhesive, thus preventing tampering of the card.

Abstract: A process for making steel wear plates for use as railroad car truck side frame/bolster damping components utilizes the sequential steps of heating, pressing, quenching and then tempering. The heating process includes bringing the wear plate to a temperature of approximately 1750.degree. F. so that the plate is essentially 100 percent austenite. Generally uniform pressure is applied to the plate while heated to bring the plate to a desired flatness. Quenching fluid is thereafter applied to the flattened plate, while maintaining pressure thereon, to bring the plate to a predetermined brinnell hardness, a predetermined temperature, and a metallurgical characteristic of at least 90 percent martensite. The plate is thereafter tempered at a temperature of from 910.degree.-940.degree. F. for a period of time sufficient to bring the plate to a brinnell hardness less than the hardness after quenching.

Abstract: A reusable fabric surgical drape such as a cardiovascular drape, for example, having a fenestration to be positioned at a surgical site and one or more slits formed in the drape. Each slit has overlapping edges which are releasably attachable together. The surgical drape may have one such slit extending from the fenestration to an edge of the drape, which, when opened, enables removal of the drape from the patient about any surgical equipment attached to the patient through the fenestration. One or more additional such slits may be formed in the drape and so positioned and shaped as to provide, when opened, reclosable surgical site fenestrations.

Abstract: A flush toilet system includes a bowl that is drained in a flush operation through a flow path including a trap and a siphon. A bypass passage supplies a back jet of water in the reverse flow direction in the flow path. A back jet valve assembly opens to permit back jet flow during only the first part of the interval during which flush water is supplied to the system from a water supply. The kinetic energy of the back jet is converted to static pressure to block or impede flow of flush water through the flow path. Water level increases in the bowl, and when the back jet flow is discontinued a siphon flush operation proceeds. The back flush valve assembly also releases water after the flushing operation in order to reseal the trap.

Abstract: A RE-TM-B magnet is produced by employing a circular tube placed between a upper punch and a lower punch, wherein a magnetic powder is loaded. After the loading, the powder is hot pressed in the tube by the action of the upper punch at a temperature of 400.degree. to 1000.degree. C. to produce an isotropic magnet compact. Subsequently, the compact may be hot worked at a temperature of 400.degree. to 1000.degree. C. to obtain an anisotropic magnet, if desired.

Abstract: A bridge plate assembly for use in moving vehicles between rail cars for unloading and loading has a sufficient length to span the space between adjacent rail cars and has sufficient width to accommodate vehicles of varying wheelbase. The plate assembly includes two load bearing plate members, positioned one on top of another, with one end of each plate member being formed and adapted to be attached to the end of a rail car. Each plate member has top and bottom face layers bonded to an intermediate low density core.

Abstract: A friction wedge for use in damping relative movement between the bolster and the side frame of a railroad car truck includes a body formed and adapted to be positioned in a pocket of one of the bolster and side frame. The body has spaced body portions integrally joined by an intermediate connecting portion. Each of the spaced body portions has a friction surface formed and adapted during normal use to be in frictional contact with a wear resistant surface on the other of the bolster and side frame. The spaced friction surfaces on the wedge body are effective to increase the resistance to bolster/side frame warp movement over and above the resistance provided by a continuous friction surface which is equal in width to the distance between the outside of each of the spaced friction surfaces.

Abstract: A tri-fold label or business form is provided. The tri-fold label includes a label ply and a liner ply, both having respective first and second sides. Through a series of die cuts and lines of perforations, first, second, and intermediate panels may be defined on the label ply. An additional panel, one or more side panels, and a removable tab may also be provided. The liner ply remains adhered to portions of the label when folded and applied to a surface to facilitate removal of various panels of the label.

Abstract: The position of a slide valve in a screw compressor in a refrigeration system is controlled using a gaseous medium sourced from the higher pressure one of two or more sources of such fluid. Preferred sources are refrigerant gas in a closed compression pocket in the working chamber of the compressor and refrigerant gas in the discharge passage downstream of the compressor's discharge port. The multiple sources of such gas are connected to a solenoid valve which, when open, permits gas to act on the piston which controls the position of the slide valve. Due to a check valve arrangement, it is always the one of the sources of gas which is at higher pressure that acts on the slide valve actuating piston. The adverse affects of refrigerant gas out-gassing and gas bubble collapse associated with use of hydraulic fluid rather than a gaseous medium to modulate compressor capacity are avoided while advantageous use is made of compressor overcompression in the control of slide valve position.

Abstract: A drainage fixture for a sanitary device, such as a sink, lavatory, or bathtub having a drainage socket with a drain hole includes a drainage funnel and a stationary disk inserted into the drain hole of the sanitary device. A plunger, including a plunger head and a guide element, for closing the drain hole is positioned under the stationary disk so as to be movable between a closed and an open position. The drainage funnel has an upper rim portion forming a sealing collar for the plunger head in the closed position. The upper rim portion is recessed in the drain hole so as to provide space for a longitudinal movement of the plunger head between the closed and the open positions.

Abstract: This invention relates to a syringe assembly which includes a housing having a barrel having a forward fluid discharge end; a plunger disposed within said barrel and having a threaded rod extending therefrom; a threaded nut element for engaging said threaded rod for threaded advancement of said plunger relative to said barrel; and a control lever for positively engaging and positively disengaging said threaded nut element with said threaded rod, said control lever having a first arm member connected to said threaded nut element and being pivotably mounted for pivot between an engaged position wherein said first arm member positively engages said threaded nut element with said threaded rod, and a disengaged position wherein said first arm member positively disengages said threaded nut element from said threaded rod.

Abstract: Noise reduction in a screw compressor based refrigeration system is achieved by the use of multiple compressor discharge and/or suction lines. The lines are configured and/or fabricated from materials which reduce system noise which would otherwise be induced by vibration as well as the system noise associated with gas pulse energy in the discharge gas stream flowing from the compressor.

Abstract: Tandem magazines store tray blanks of different size for loading product in different pack patterns. Each magazine has a depending cam device that engages unique lugs on the tray conveyor to allow the lowermost blank to be received on the tray conveyor, and then to be gripped by the unique lug for transport downstream toward the load station. Since only one magazine is used at one time these cam devices can be deactivated as desired. One of the two blank withdrawing means associated with each magazine is located under the tray blank conveyor and operates in timed relationship with it. The blank withdrawing means are also selectively deactivated for the same reason.

Abstract: An oil separator for a refrigeration system employing a screw compressor includes a generally cylindrical, vertically upstanding housing the bottom of which defines an oil sump and the top of which is penetrated by discharge conduit connecting the oil separator to the refrigeration system condenser. The center line of the discharge conduit is parallel to but offset from the center line of the separator housing so that the discharge conduit is non-concentric with the housing. As a result, an enlarged tangential inlet to the interior of the separator is made possible which is unimpeded by the discharge conduit. The cross sectional flow area through which the mixture discharged from the compressor passes prior to entering the separator can therefore likewise be increased. As a result, pressure drop in the refrigerant gas as a result of the oil separation process is reduced and overall system efficiency is enhanced while the diameter of the separator housing is minimized.