Abstract: A hexagonal protective and high temperature resistant system for the Space Shuttle Orbiter consists of a multiplicity of pockets formed by hexagonally oriented spacer bars 11 secured ot the vehicle substructure 12, a packing of low density insulating batt material 18 in each pocket, and a thin protective panel 19 of laterally resilient advanced carbon-carbon material surmounting the peripheral bars 11 and packing 18. Each panel 19 has three stepped or offset lips on contiguous edges, as M-1, M-2, M-3, the other three edges, as M-4, M-5, M-6, being non-stepped, i.e., flat so that complementary edges of abutting panels rest against the peripheral bars. At the center of each pocket is a fully insulated stanchion 15 secured to and connecting the substructure and panel for flexing the panel toward the substructure and thereby prestressing the panel and forcing the panel edges firmly against the spacer bars.

Abstract: A device for affixing two panels in abutting relationship to a support structure including an elongated base member with two transversely spaced, elongated areas each defining a planar surface for engaging the underside of the panels, an elongated locking projection integral with and extending from the base member with a height greater than the thickness of the panels, and areas for receiving fasteners to secure the base member to the support structure. The device also includes an elongated cap with an integral, elongated slot for engaging the locking projection and elongated panel contacting areas on each side of the slot for contacting the upper surface of the panels.

Abstract: A paneling structure and a retainer for use therewith. The paneling structure is of the overlapping type and has first paneling elements that are spaced farther away from the surface to be paneled and second paneling elements that are closer to that surface. The paneling elements themselves are of wood, plastic or the like. The retainer is appropriately Z-shaped and is provided with an engagement projection and a press-in projection which cooperates with the parts so as to hold the paneling structure together.

Abstract: A concealed connector for detachably coupling two panels together comprises a keeper entirely recessed within an edge of one panel and a rotatable latch outwardly projecting from a surface of the other panel. The latch includes a cam portion in the form of a partial thread which is inserted within the keeper recess for engagement with a flanged lip on the keeper. A stylus key is passed through a narrow access slot in communication with the recess and is selectively received within circumferentially spaced holes in the latch periphery. Turning of the latch in one direction by the key draws the abutting edges of the panels together in locked disposition while turning the latch in the other direction effects release.

Abstract: The specification discloses a method and associated products for adding stirrup reinforcements to a concrete pipe reinforcing cage in which a mat composed of a plurality of sinusoidal shaped stirrup members joined by tie wires is joined to a cage with the sinusoidal stirrup members oriented circumferentially with respect to the cage rather than longitudinally.

Abstract: A clip for attachment of metal planking to a T-bar, which comprises an elongated main body having parallel sides, a generally trapezoidal projecting portion, and an intermediate portion integral with and joining the longer base of said trapezoidal portion to a side of said main body portion, all of said portions being coplanar and the bases of said trapezoidal portion being parallel to said main body sides, said intermediate portion being shorter than said longer base to define a pair of opposed open slots between said projecting portion and said main body portion for receiving the edges of the metal plank; and an elongated ear normal to and integral with said trapezoidal portion at each inclined side thereof and extending from the longer base to the shorter base thereof, each said ear being operable, when one edge of a plank is secured in a slot and the free edge of the plank is manually pushed against said ear, to cam the free edge of a plank across said ear and into said slot.

Abstract: A guide mechanism for a case packer is characterized by a mounting member, a plurality of guide member fingers, and a plurality of expansion springs, each spring connecting a different finger to the mounting member and also biasing the bottom of the finger towards a converging position with the other finger bottoms. The springs act substantially vertically, enabling substantially unlimited universal pivoting of the fingers relative to the mounting member and thereby reducing the likelihood of finger breakage in the event of a jam.

Abstract: Method of and means for wrapping generally cylindrical products with plastic film in which the film extends from a supply roll over a supporting means and terminates in a free end. The product is placed on the supporting means, the free end of the film is transferred to the product and the product is rotated to draw film from the supply roll and cause it to be wrapped around the product. The wrapped product is removed from the supporting means and the film is severed.

Abstract: A metal container is deformed to have a sheared portion in a part of the wall thereof, a projecting portion formed adjacent to the sheared portion and outwardly projecting from the wall of the container, the projecting portion having a fractured side surface and the dimension of the projecting portion in a direction transverse to the side surface increasing in a direction outwardly of the container. A gas introducing passage thereby is formed to extend along the sheared portion and the fractured side surface and through the wall of the container.

Abstract: A method and apparatus are disclosed for making a series of coil springs pocketed within individual pockets in an elongate fabric strip comprised of two overlying plies capable of being thermally welded together. The fabric strip is fed along a guide path during which compressed coil springs are inserted between the piles with the axes of the springs substantially normal to the planes of the plies, whereafter the fabric plies are thermally welded together longitudinally and transversly to form a series of connected pocketed springs. After thermal welding, the pocketed springs are passed through a turner assembly during which the coil springs are reoriented within the fabric pockets to positions wherein the axes of the springs are transverse to the fabric strip.

Abstract: A pneumatic splicing apparatus for spun yarns comprising a splicing member having a splicing hole and a jet nozzle for jetting a compressed fluid into the splicing hole, control nozzles arranged on both the outer sides of the splicing hole to suck and to untwist the yarn ends, cutting devices for cutting the yarn ends, and yarn guiding means for inserting the yarn ends into the splicing hole. The control nozzles provides with a cylindrical sleeve slidably fitted in the nozzle hole thereof to change the position of a jet hole of the control nozzle relative to the yarn ends to be untwisted.

Abstract: In a double twist spindle assembly of the type including a central spindle having a bore therethrough and extending through a can, the spindle supporting within the can a lower yarn package and an upper yarn package each feeding yarn into the bore of the spindle above the packages, an improved device for guiding the yarn which is unwinding from the lower package to prevent its contacting the upper package comprising a disk between the packages and a corrolla device supported on the disc to guide the yarn from the lower package away from the upper package, and the corrolla device comprising plural interlaced leaf members which lie against the upper package and follow its shrinking diameter so that the corrolla automatically shrinks in diameter as the yarn is used up.

Abstract: In a gas turbine engine of the type wherein the fuel is injected through a pray injection nozzle into a combustion chamber, the improvement is a method and apparatus for modifying the characteristics of the fuel spray from the fuel injection nozzle so that fuels of higher aromatic content can be efficiently used in the engine. An electrode is disposed within the combustion chamber to provide a high strength electrostatic field in the vicinity of the injection nozzle so that the fuel spray from the nozzle becomes charged as it leaves the nozzle. The strength of the electric field is adjusted to provide a spray characteristic which produces optimum engine performance as determined by measuring an operating parameter of the engine such as the temperature of the gases exiting from the combustion chamber.

Abstract: An annular sleeve surrounds a turbine rotor and is fixed with respect to the turbine casing, the sleeve being elastically deformable in a radial direction. A wear ring is carried by the sleeve, the wear ring being composed of segments arranged end-to-end circumferentially. The adjacent ends of the segments are spaced apart when the turbine is cold or idling. The thermal expansions of the turbine rotor and of the sleeve and ring are so related that in one operating temperature range of the turbine the spaces between the adjacent ends of the ring segments close and the segment ends engage each other, and in a higher operating temperature range of the turbine the sleeve expands. Air leaving the compressor is directed against the sleeve and the stationary part carrying the sleeve. The wear ring and portion carrying the sleeve may be insulated. The sleeve may be mounted on a combustion chamber surrounding the turbine.

Abstract: An annular sleeve surrounds a turbine rotor and is fixed to a stationary part, the sleeve being elastically deformable in a radial direction. A wear ring is carried by the sleeve, the wear ring being composed of segments arranged end-to-end circumferentially. The adjacent ends of the segments are spaced apart at all operating conditions of the turbine. The thermal expansions of the turbine rotor and of the sleeve and ring are so related that under operating conditions of the turbine, when the engine of which it forms a part is running, the sleeve thermally expands radially. The rate of thermal expansion of the stationary part is directly related to the rate of thermal expansion of the turbine rotor. Air leaving the compressor is directed against the sleeve and the stationary part carrying the sleeve. The wear ring and portion carrying the sleeve may be insulated. The sleeve may be mounted on a combustion chamber surrounding the turbine.

Abstract: A four-cycle internal combustion engine is provided with apparatus comprising a turbine in the inlet air flow path and an extracting compressor in the exhaust gas path. Where the internal combustion engine is an automobile engine and is operating under normal cruising conditions, the manifold inlet pressure is substantially less than atmospheric pressure and incoming air drives the inlet turbine to in turn drive the compressor. The arrangement is such that the inlet air is isentropically expanded while the exhaust gas back pressure is decreased. As a consequence, the energy of compression is reduced and the overall operating temperature of the internal combustion cycle is lowered with the result that more power is delivered for a given quantity of fuel.

Abstract: Coaxial bidirectional spool valves are provided for use in fluid systems such as hydrostat systems where flow can proceed in opposite directions, and which direct flow through a unidirectional or multidirectional function such as a filter assembly in the normal direction regardless of the direction of flow in the system. The valve includes a spool valve reciprocably movable between two limiting positions according to fluid pressure differential across the valve and engaging one of a pair of bungee followers in each position, thereby intercepting and controlling flow through a box junction of the fluid line with the lines leading to and from the filter assembly in a manner such that, regardless of the direction of flow in the fluid line, flow proceeds in the same direction in the connecting fluid lines to and from the function.

Abstract: An improved transmission from linear power to rotary power in a Stirling heat engine having at least one cylinder with power and displacement pistons linearly operable therein. The power and displacement piston shafts are each interconnected to a common drive shaft through an actuating arm. The power and displacement shaft connections to the actuating arms are through universal joints and their drive shaft connections are rotary connections. The rotary connections of the actuating arms to the drive shaft are eccentrics or cams angularly displaced from the longitudinal center line of the drive shaft and rotatably positioned relative to each other so as to provide the proper operational phase angle of the pistons. A timing shaft running through at least a portion of the drive shaft is translatable a discrete distance to change the relative rotational positions of the eccentrics or cams through 180.degree. of rotation displacement piston eccentric rotates 90.degree. while the power piston eccentric rotates 90.

Abstract: There is disclosed an air operated demand only hydraulic power unit for supplying hydraulic fluid under presure to one or more hydraulic working motors, comprising an extensible pneumatic power motor including an extensible power transmitting member, an extensible hydraulic slave motor including an extensible slave member powered by said power transmitting member, said slave motor being connected to each said hydraulic working motor to power same, valving for controlling the supply of air and oil to said power and slave motors, and a reset valve for insuring full volume cycling of said slave member in said slave motor. In one embodiment the reset is indicated by sensing the various pressure changes after all working motors are extended and then valving leftover oil to a reservoir. A second embodiment accomplishes the reset on a time delay basis.

Abstract: A prime mover has a tubular metal member of substantial length which, when both its exterior and its interior are subjected to a heating and cooling cycle, produces work strokes of substantial force, but too short to accomplish a wanted work. A mechanism connected to at least one end of the tubular member converts the short work strokes into strokes of increased lengths with a proportional decrease in force, but with the resulting work stroke lengths and force adequate to accomplish the wanted work.

Abstract: Energy is extracted from a high-temperature high-pressure working fluid by augmenting flow of the working fluid with a flow of gas having a molecular weight less than the fluid, utilizing some of the energy from the working fluid to induce addition and mixture of the gas in an ejector creating a flow of the mixed fluids having a greater mass and lower temperature than the initial flow of working fluid and supplying the mixed fluids to a turbine which converts the energy in the mixed fluids into mechanical energy. The exhausted fluids are separated and at least the augmenting gas is recycled to the ejector. The gas is selected from the group consisting of hydrogen, helium, nitrogen, air, water vapor, or an organic compound having a molecular weight less than the working fluid, and the working fluid is selected from the group consisting of an inorganic element, an inorganic compound, or a fluorocarbon.

Abstract: An internal combustion engine comprising a primary engine unit and an auxiliary engine unit, in which a clutch of the auxiliary engine unit is engaged at a proper phase difference between both engine units.

Abstract: A method and device for cooling molds circulating in a horizontal plane, in which siphon action is used to pass cooling liquid from a top gutter through the molds. In this way the whole cooling system is becoming constructively simplified, such that production speeds can be increased, with the consequent greater length of the cooling system, but without its becoming unduly complicated. This effect is realized irrespective of the nature of the machine or the number of molds.Method and device are especially advantageous when applied with the manufacture of plastics tube, more particularly yet with the manufacture of plastic corrugated tube.

Abstract: There is provided a method and apparatus for cooling elongate product, such as wire. A housing is provided to define a chamber with an inlet for the product and an outlet for the product, both the inlet and outlet being larger in area than the product. Within the chamber liquid is sprayed against the product to cool it, and suction is utilized to withdraw air and liquid from the chamber at a rate which results in an air-wiping effect on the product by the air entering the chamber through the inlet and outlet.

Abstract: A well type open top refrigerated display case has a primary air conduit extending around the cabinet and main fans for circulating air through the primary conduit and across the open top of the cabinet in the form of an air curtain. Defrost fans are mounted in the case to draw ambient air from above the refrigerated display case into an upper portion of the primary conduit at a higher pressure than the air pressure in the region of the open top. Defrost control means are provided for energizing the defrost fans at the start of a defrost cycle to propel a portion of the higher pressure ambient air out of the primary conduit through an air opening to collide with an air curtain flowing across the open top, the flow of the air curtain being thereby reversed and caused to flow over the top of and outside the display case. A further portion of ambient air is drawn downwardly by the main fans to flow through the primary conduit and assist in defrosting the coils.

Abstract: A refrigerated display case of the wide island type having side-by-side, upwardly opening product display wells, uses its primary air circulating fans and a defrost fan to draw ambient air into the inlet and outlet of the air conduit of one product well, circulate it through the conduit of that well, transfer it to the air conduit of the second well, circulate it through the second conduit, and discharge it to atmosphere through the inlet and outlet of the second conduit. The case incorporates a solid center partition having an opening near the bottom of the case in which the defrost fan is mounted to transfer the air from one product well to the other. A splitter panel and sill at the upper end of the partition prevent the intake air from becoming mixed with the exhausted air. During a defrost cycle the air can be drawn into the first well and exhausted from the second well for the full duration of the cycle.

Abstract: A three phase absorption system containing two or more reactor systems for binding refrigerant in a thermally reversible chemical reaction to absorbent materials within the reactor systems, means for supplying heat to, and removing heat from the reactor systems, means for recovery of at least part of the sensible heat energy from reactors in each of the reactor systems, and means for conveying, expanding, evaporating and condensing refrigerant gas from the reactor systems.

Abstract: The present invention relates to a self-contained air conditioning unit and more particularly to a control system having a plurality of sensing means wherein a frost monitoring control is initiated in combination with the outdoor fan in a selected outdoor heat exchanger surface temperature and outdoor ambient temperature range and frost present on the surface of the outdoor heat exchanger, and a second stage defrost initiated in combination with an auxiliary heater at a below preselected temperature.

Abstract: A refrigerant apparatus having an accumulator for receiving binary refrigerant from the evaporator of the apparatus. An expansion valve is connected in parallel with a capillary duct for increasing the refrigerant delivery from a preselected minimum determined by the capillary tube to controlledly flood the evaporator. The lower boiling point component of the binary refrigerant is caused to be separated in the accumulator for delivery to the compressor during flooded operation of the apparatus so as to increase the proportion of the low boiling point component in the binary refrigerant to provide increased refrigeration capacity to meet the increased demand. Upon decrease in the demand, the accumulated liquid refrigerant in the accumulator is gasified for returning the system to the normal ratio of components of the binary refrigerant. The expansion valve is caused to operate as a function of the temperature of the space refrigerated by the evaporator in effecting the desired flooding operation.

Abstract: A system and method for managing energy in large multistage refrigeration systems and the like having a hot gas defrosting system by continuously monitoring operating parameters and controlling to optimize the refrigeration system compressor pressures and defrosting cycles. A multiplicity of remote sensors is disposed at the appropriate points in the refrigeration system to produce analog electrical signals representative of the evaporator air temperature, evaporator refrigerant temperature, and similar temperatures, and pressures such as the head pressure, booster suction pressure, intermediate suction pressure, and the like. A signal processor is provided to receive signals from the sensors, to condition the analog signals, convert to digital signals and to feed a digital computer which has a memory for storing system design pressure and temperature parameters and refrigerant characteristics.

Abstract: The present refrigeration apparatus includes a single condenser and compressor, two evaporators, and more particularly an electronically controlled valve system that delivers refrigerant to one evaporator in preference to the other, but will cause the valve system to deliver refrigerant to the other evaporator after a predetermined amount of time.

Abstract: A combination of an internal combustion engine and an absorption type refrigeration system is designed to make a simultaneous use of both of the engine exhaust gas the heated engine cooling water. The internal combustion engine and the absorption type refrigeration system are combined such that the exhaust gas is utilized as the heat source for a gaseous refrigerant generator having the highest operating temperature in the system while heated engine cooling water is utilized as the heat source for another generator which operates at a temperature lower than the operating temperature of the first-mentioned generator.

Abstract: An evaporative cooler according to the invention comprises a one-piece, three-layer pad wrapped around an open-sided cylindrical barrel-like structure. Water is sprayed uniformly over the interior surface of the pad while a centrifugal blower draws air in through the pad from the outside. A novel base design renders it possible to replace the standard square base coolers with the cooler of the present invention. The cooler can be used either with downward or side delivery systems and can easily be adapted to being mounted in a window. The top, base, and barrel are separately fabricated of a non-heat conducting material and are so shaped that they can be nested or stacked for economy of space in storage or shipping.

Abstract: The present invention relates to a chiller of the type wherein water is used as refrigerant and lithium bromide or a similar compound as absorbant. A conduit or line is provided leading from the refrigeration pump which conveys dilute aqueous lithium bromide or similar compound, from the evaporator section. The line is provided with a valve for blocking fluid flow when not in use and for tight closure of the line. According to one embodiment, the conduit or line is adapted to be connected to a conduit leading to a purge storage tank through which dilute lithium bromide is introduced into the absorber.

Abstract: A straight bar knitting machine has a variable draw mechanism including a draw cam, means following the draw cam, a first differential input member, means for varying the ratio with which movement of the draw cam following means is transmitted to the first differential input member, a second differential input member and means for controlling the movement of the second input member so as to provide a lead of the carrier in each direction of carrier traverse. The control means include a cam mounting movable conjointly with the first differential input member, cams on the mounting of fixed throw, means for moving the cams in step with the means for varying the transmission ratio to the first differential input member and cam follower means for engaging the cams and connected to second differential input member so as to ensure that the fixed throw establishes the desired extent of carrier lead at the end of each traverse at varying draw widths.

Abstract: Apparatus for the wet treatment of lengths of textile material in hank form has a plurality of chambers through which the lengths of material pass in succession and transport means which convey the length of material. To enable more or less elastic types of material to be subjected to wet treatment under desired uniform treatment conditions, the quantities of material contained in the individual chambers are monitored by sensing devices which control the rate at which the material is conveyed by the transport means.

Abstract: A vertical axis flow through type clothes washing machine with a basket driving transmission which imparts a wobble action to the basket during wash and conventional rotational motion during spin operations. The transmission supports the basket such that when the input drive shaft rotates in its wash direction, the central basket axis is canted relative to the substantially vertical axis of rotation of the drive shaft. As the shaft rotates, the central basket axis describes an inverted cone thereby imparting the wobble action to the basket which is prevented from rotating about its own axis. When the drive shaft rotates in the opposite direction for spin, the central axis of the basket is substantially coaligned with the vertical axis of rotation of the input drive shaft, and the basket is rotated about its own axis for centrifugal extraction of liquid from the clothes in the basket.

Abstract: Two generally flat, circular plates, one having an attached threaded male cylindrical shaped extension and the other an attached mating threaded female cylindrical shaped extension are threaded together through the ring of a trailer hitch tongue until the plates are in contact with the ring and held locked in threaded engagement by a latch to prevent the unauthorized use of the trailer. The latch is spring loaded and is extended through an opening in the side of the male cylinder to engage any one of a number of internal grooves coaxial with the cylinder, cut in the female cylinder, to provide the locking function. A single lobe cam contained within the male cylinder is mounted on the end of a conventional lock cylinder which, in turn, is rotated by a matching key.

Abstract: A central door-lock system has a plurality of door latches each including a detent displaceable between an open position securing the respective door to the respective doorpost and a closed position permitting the respective door to separate from the respective doorpost, a manual door-opening handle, mechanism including a primary latch member connected to the handle and connectable to the detent and movable between a lock position preventing this handle from displacing the detent between its open and closed positions and an unlock position permitting the handle to displace the detent between the open and closed positions, and a secondary latch member displaceable between a lock position urging the primary latch member into the respective lock position while permitting the primary latch member to move into the respective unlock position, an unlock position permitting the primary latch member to move freely between the respective lock and unlock positions, and an antitheft position positively holding the primar

Abstract: A control device for a magnetic cylindrical lock having a cylindrical housing and a cylindrical plug disposed for rotational and axial movements in the housing, comprises a longitudinal bore in the plug, magnetic rotary members arranged for rotation across the longitudinal bore, and arresting means for blocking the rotation of the plug in one axial position of the latter and for permitting the rotary movement in another axial position.

Abstract: A tumbler lock having an outer cylinder and an inner cylinder rotatably mounted therein with springless plate-shaped tumblers which move freely in guide slots. Tumbler locks of known construction can be opened by unauthorized persons because an object can be inserted through the windows in the plate-shaped tumblers required for the insertion of the key, wedged against the side faces of the windows and the tumblers lifted from their locked state. This is foreclosed in the invention because the side flanks of the windows in the area of the key guide which are parallel to the direction of the motion of the tumblers are covered by protective strips connected with the inner cylinder.

Abstract: A rekeyable cylinder lock includes removeable spacers between top and bottom tumbler pins, and a key bit device for removing a spacer from the pin chamber through the key way. The key bit device includes bitting thereon to position the spacer in the top pin chamber and a cut in the opposite side thereof adapted to capture the spacer from the top pin chamber and remove it from the lock. In another embodiment of the invention, a key bit device is provided for placing a spacer into a pin chamber of the lock to rekey the lock. It includes a mechanism, such as a spring, in a cut on the back side of the key bit that is adapted to force a spacer out of the cut and into the pin chamber in the lock.

Abstract: Lock and key device with the lock comprising a barrel for driving at least one bolt, rotatably mounted in a fixed hollow shaft and containing fittings the cooperation of which with wing couples formed on the key in its operational portion unblocks the barrel relative to the shaft as to a rotary movement when the key is completely driven-in, means being provided in the lock and on the key for limiting the driving-in of the key inside the lock to the unblocking position of the fittings, a longitudinal undeceiver of the key cooperating with a barrel slot, distinguishing a wing couple from another wing couple for the introduction in a correct position of the key inside the lock.

Abstract: A casing for holding a key in one of two pivoted positions. The key pivots about an axis extending along one edge thereof when a lock is turned by the user of the key. An indicator may be attached to the key for extension through a small opening in the casing or housing when the key is in one position and for retraction below the level of the casing periphery when the key is in the opposite position. In a second embodiment, a portion of the casing may be pierced along three edges and arranged so that, when the key is in one position, the pierced portion is pushed above the casing periphery and, when the key is pivoted to the second position, the pierced portion is coextensive with or below the casing periphery. In a third embodiment, an indicator may be pivotally fastened in position between halves of the casing for movement (a) above and (b) even with or below the periphery of the casing when the key is pivoted.

Abstract: A rolling stand has a conventional housing defining a pair of parallel and spaced axes defining a plane. Respective rolls have roll ends journaled in the housing at the axes and roll bodies axially symmetrical about the respective axes and having centered on the respective axes complementary roll-body surfaces of noncylindrical shape and each formed by rotation of a continuously curved generatrix about the respective axis. One of these contoured rolls is displaceable axially relative to the other roll from an end position to another position, and the roll-body surfaces form at the plane in the other position a uniform nip and in the end position a nonuniform nip. This system is set up to be able to displace one of the rolls axially relative to the other of the rolls between the end position and the other position. These contoured rolls may themselves define the nip, or may engage and deform other rolls that define it.

Abstract: A gas chromatograph Fourier transform infrared (GC/FTIR) system includes a GC oven having a flexible capillary column therein for separating components of a sample. The column discharges effluent directly into a light pipe associated with an FTIR spectroscope. An auxiliary flow of carrier gas is added to the effluent at the light pipe to convey constituents through the light pipe free from tailing or peak broadening.

Abstract: An engine knocking detection device has a diaphragm to be disposed in contact with the engine cooling water so as to resonate with pulsations of the pressure of the cooling water caused by engine knockings, and output elements responsive to the vibration of the diaphragm to produce an electrical output signal to be utilized for the control of engine spark timing. The water-contacting surface of the diaphragm is coated with a layer of a hydrophilic material operative to prevent attachment or adhesion of air bubbles to the water-contacting surface of the diaphragm whereby the sensitivity of the diaphragm to the water pressure pulsation is improved.

Abstract: A device for testing an air brake system of a locomotive, an air brake system having a compressed air source, a conduit for the ingress and egress of compressed air and a brake valve which is communicatively connected to both the compressed air source and the ingress/egress conduit. The device is particularly for testing the functionality of the brake valve of the air brake system. The testing device includes a trackside stand for placement in proximity to a locomotive servicing site, and a storage reservoir for holding a predetermined volume of compressed air. The trackside stand is further comprised of a conduit having one end for communicative connection to the storage reservoir and an opposite end for communicative connection to the ingress and egress conduit of the locomotive air brake system.

Abstract: A method for high speed leak test for a metallic cover with a pull tab. When one wants to test whether a metallic cover with an opening-defining score line and a pull tab for breaking off a part of the cover defined by the score line has a leak, the cover is put in a closed chamber. The closed chamber is divided into an upper closed portion in which the tab is present and a lower closed portion in which the tab is absent, thereby making the cover the boundary. Pressurized air is then injected into the upper closed portion to test whether the cover has a leak by measuring the change in the air pressure within the lower closed portion.

Abstract: A device for monitoring the leakage of cooling gas for a turbogenerator stator into the stator water-cooling system is disclosed. The device is located next to the generator so that the operative elements are at the generator storage tank operating water level. As cooling accumulates in the storage tank together with cooling water, the gas displaces the water in the leak monitor until the water level rises to a predetermined, adjustable level. When this level is reached, the gas is vented and the water level is restored to equilibrium. Each cycle is recorded on a leak trip counter. When the leakage rate exceeds a predetermined value, an alarm is triggered.