Abstract: A pre-inked stamp device comprising a holder or mount and a die, said mount comprising a shell, a stamp core reciprocally movable relative to said shell, and a handle affixed to said core for reciprocally moving said core; the improvement wherein said shell and core are formed with complementary elongated ribs that contact and guide the core within said shell during relative reciprocal movement.

Abstract: Propellant charge device for recoilless weapons of the type having a barrel open at both ends with the propellant charge device being positioned behind a projectile and insertable into the front end of the barrel. The propellant charge device includes an elongated casing having a powder charge portion, a cavity portion and a tamp portion axially sequentially arranged within the casing and extending from the front to the rear thereof. The casing has a length such that it extends within the barrel of the weapon from the position thereof behind the projectile substantially over the entire length of the barrel.

Abstract: Disclosed is a safe/arm detonator assembly for use with an oil well perforating gun assembly having two housing members sealingly isolated from well bore fluid and which are rotatable from a safe position wherein a detonator and a booster are held out of alignment, to an armed position wherein the detonator and booster are moved into alignment. The detonator assembly is further arranged to be installed in a well perforating gun assembly such that the gun assembly may be transported with the detonator assembly in the safe position, and rotated to the armed position at the well site without disassembling the gun assembly. A safety pin is further disclosed which may be included in one of the housing members to cover and protect the booster from accidental detonation when the detonator assembly is in the safe position.

Abstract: A turntable, for a vehicle such as an automobile, which employs several detectors arranged to determine whether an automobile is located on the turntable in a desired position. Since the desired position depends on the size of the automobile, at least three detectors are used, one for small, one for medium, and one for large automobiles. The output of the detectors is displayed by visual indication. When an automobile is detected in a proper position, the driver may energize the turntable driving motor to rotate the turntable any desired amount, for example, 180 degrees. As the turntable approaches the angular position in which it is to stop, a cam-follower signals the approach to that position, deenergizing the motor and may apply a brake. The turntable, however, coasts to its final position where a plunger is biased into a socket to lock the turntable. Upon restarting the turntable, the plunger is removed from the socket.

Abstract: A tracked vehicle system comprises a load-carrying vehicle formed by two bogies each of which has two co-axial rollers, the two bogies being connected by an articulating spindle carrying a centering roller arranged to bear against the internal sides of the track. Each bogie preferably carries a steering roller rotatable about a vertical axis and situated substantially in the same plane as the centering roller.

Abstract: A wall-type safe provided with a main parallelepiped body defining therein a main storage chamber, the front side of the body being closed by a swingable door. One of the walls of the body has an enlarged opening formed therethrough, which wall exteriorly thereof has a pair of opposed guide flanges extending along opposite sides of the opening. A boxlike compartment which is open at one end, is provided with flanges along the open end which slidably engage the guide flanges on the body for connecting the compartment thereto, whereby the compartment defines therein a secret chamber accessible solely from the main chamber. An interior wall is disposed in the main chamber and overlies the opening for covering and closing same, which interior wall is removable when access to the secret chamber is desired.

Abstract: A controlled air incinerator having an increased capacity for burning waste material and having increased efficiency for completely burning all burnable waste material fed thereto. The controlled air incinerator, which is sometimes referred to as a "starved air" incinerator, requires accurate control of burning conditions so as to provide at all times a discharge of clean flue gases free from pollutants. In the present incinerator, means are provided for transferring the waste material therethrough while burning, the means causing the burning waste material to tumble within the combustion chamber and open up so as to expose to combustion air any unburned but burnable parts of the waste material whereby the oxygen of the combustion air will result in complete combustion.

Abstract: Outriggers of a trimaran mounted on hinged arms for swinging from a sailing position to an alongside position are braced in sailing position in each case by a tension cable having its ends fixed with respect to the outrigger at the connection with the arms and its center detachably fastened to an eye affixed to the main hull. Each tension cable is tightened by a bridle bridging the midpoint of the cable pulled towards the outrigger by a tackle of which the free end is secured to the main hull. If the point at which the middle of the tension cable is secured to the main hull is lower than the places where the ends of the cable are anchored, tightening the tension cable tends to relieve the arms of strains produced by the buoyancy of the lee outrigger.

Abstract: A propulsion unit for driving water craft, particularly those of the floating lounge type, is disclosed as including a fin made from a flexible material with a first end formed to define a foil into which the lower end of an oscillatory drive member projects downwardly in a fixedly secured relationship and with a second flexible fin end that extends from the foil end to provide a flapping movement through the water upon oscillation of the drive member in order to propel the water craft. Movement of the drive member through the water is facilitated by the foil shape of the first fin end which is also more rigid than the second flexible end so as to increase the moment arm about the drive member where the flexible flapping movement is concentrated. Flexible sheet plastic is preferably used to form the fin with a folding operation at a score line to define the foil shape.

Abstract: A device for constituting in the wall of a pipe an optical pick-up window which may be scavenged by a protective fluid. A chamber is provided with an inlet for said fluid and an outlet for said fluid, said chamber passing through said wall and opening into said pipe through an open end, the opening of which constitutes said outlet, and a tube introduced into the chamber so as to constitute in the chamber about the tube an annular conduit starting near the said inlet of the chamber and leading towards said outlet, one end of the tube being provided with said window and being placed in the chamber opposite said outlet, the other end of the tube opening outside the chamber, wherein the distance between the window and the outlet is sufficiently short for the flow of protective fluid in front of the window to be a sheet of fluid.

Abstract: An arrangement for marking articles or workpieces, particularly hot workpieces, such as coils of sheet metal with series of symbols which are individually applied in templates. The latter are in the form of symbols applied in a cylindrical portion and in a flange-like portion of a movable angle ring which is adjustable vertically and sideways. A spray nozzle is associated with each of the portions. The angle ring is connected to a trunnion fixed in an arm which is adjustable vertically and sideways by piston-cylinder units. One piston-cylinder unit is centered in a frame which is movable on a track by driven wheels, and the piston of this unit mounts a lifting table. Another piston-cylinder unit is connected to the aforementioned arm. One vertical spray nozzle is located above the flange-like portion of the angle ring on the outer end of the arm.

Abstract: A recording medium alignment guide at the development station automatically seats and adjusts for proper tolerances relative to the developer fountain assembly to properly guide the recording medium from the recording station through the development station maintaining the recording medium at the proper height above the surface of the developer fountain assembly.

Abstract: An industrial boiler comprising a combustion chamber having a furnace therein, means for feeding products of combustion from the combustion chamber to a heat exchanger to heat water/stream therein, a pyrolytic retort, means to feed said products of combustion into heat transfer relationship with the retort to pyrolize material therein and means to feed products of pyrolysis from the retort.

Abstract: For use in association with a fuel mixture preparation system of an internal combustion engine which uses closed-loop control based on exhaust chemistry as determined by an oxygen sensor, there is described a circuit which monitors the operational readiness of the oxygen sensor on the basis of its internal resistance. The measurement takes place in a bridge circuit which is supplied with current whenever the sensor is non-operative but which becomes inactive when the sensor is at normal temperatures. The bridge voltages are fed to a comparator which generates an average output value when the oxygen sensor is not yet ready for operation and this average signal is processed in an integrator for final control of the fuel-air mixture.

Abstract: A fuel metering system of an internal combustion engine is regulated by a data processor which has stored data prescribing the proper amount of fuel to be metered out for particular positions of the throttle valve and for particular values of the engine rpm. This preliminary adjustment is further refined by providing the data processor with feedback data concerning actual engine operating parameters, e.g. the exhaust gas composition, engine speed fluctuation and temperature. The feedback data is used by the data processor to override and further adjust the fuel quantity metered out to the engine.

Abstract: In order to reduce engine output torque, a gasoline engine can omit the ration of fuel from a proportion of its cylinder cycles, employing a pattern of successive inhibition and enablement of its fuel rations. For a given output torque, different patterns of successive enablement and inhibition can be selected to minimize transmission of vibration from the engine to its environment. Selection of the optimum pattern can be made automatically.

Abstract: An annular member is fitted about an extension of the cylindrical liner and is provided with a pair of concentric chambers. The inner chamber communicates with cooling ducts within the liner while the outer chamber communicates via a single conduit with cooling cavities in the cylinder head. One or more throttle openings are provided between the two chambers to throttle the flow of coolent between the chambers. The annular member is provided with suitable apertured partitions to permit bolts to pass through in order to secure the cylinder head to the cylinder block.

Abstract: A carburettor for an internal combustion engine comprises an air valve and a driver-actuatable throttle in an induction pipe. The air valve controls proportioning means metering the flow rate of fuel drawn into the induction pipe downstream of the main throttle means via a discharge orifice. A fuel pressure regulator is disposed between the fuel proportioning means and the discharge orifice for controlling the pressure of the fuel discharged into the induction pipe and comprises a valve actuated by a diaphragm one face of which limits a control chamber communicated with that portion of the induction pipe located between the throttle and the air valve. The other surface is subjected to the fuel pressure prevailing upstream of the valve.

Abstract: A fluid flow regulator controls the amount of fluid flow or pressure of the fluid flowing through the regulator by producing an impedance to flow through the regulator which varies in relationship to the pressure differential across the regulator and which also varies in relationship to an acceleration in the fluid flowing through the regulator. The regulator has a shape which produces an acceleration in the fluid flowing through the regulator to cause the flow itself to vary the impedance to flow through the regulator. In a specific embodiment the fluid flow regulator is a vortex chamber and can be used as a replacement for existing, mechanical PCV valves for internal combustion engines. The flow regulator of the present invention provides a variable orifice valve function without any moving parts.

Abstract: Valve device includes a valve chamber containing three spherical members of different hardnesses in stacked relation therein, which produce a limited pulsating air flow that is metered in precise amounts at any given time into the fuel/air path of a gasoline powered internal combustion engine to maintain a narrow band air/fuel ratio over substantially all operating modes. The valve chamber has relatively narrow entry and exit orifices in order to increase the velocity of the pulsations generated therein while at the same time reducing the amount of supplemental air flow through the device. The valve seat also has a conical shape to establish line contact with one of the spherical members to assist in obtaining maximum resonation during operation and provide a more positive seal when the engine is not running.

Abstract: A break ignition plug for piston engines wherein an electromagnet acts upon an armature which actuates a movable electrode and an ignition pulse flows through a magnet coil of the electromagnet and a short-circuit path between the movable electrode and a counterelectrode (ground electrode). The magnetic field which builds-up in the electromagnet causes breaking of the short-circuit path while forming a spark. A pressure equalization chamber communicates with an internal cylinder chamber of the piston engine for relieving the forces which are to be generated by the armature for the movement of the movable electrode. The armature which is to be attracted, against the force of a spring, by the electromagnet is located at least partially at the side of the electromagnet confronting the inner cylinder chamber and carries the movable electrode directed towards the inner cylinder compartment.

Abstract: Cutting filaments having a long service life consist of a monofilament of a synthetic polymer into which from 0.3 to 10 percent by weight of an abrasive are incorporated. In the cutting process the abrasive is not ripped off, as it does happen with steel wires bearing the abrasive on their surface, but it is pressed into the monofilament and can be easily recovered therefrom.

Abstract: A solar heat collector panel comprising a flat spiral coil of pipe (preferably plastic) having an inlet at the inside and outlet at the outside, the inlet conduit extending out behind the coil. A plurality of approximately radial ribs is attached behind the coil to support the coil spaced from the surface on which it is installed to create a dead air space, prevent dry rot of the supporting surface, hold the coil level and stiffen the panel. A sheet of plastic material is caused to adhere to the back of the coil by adhesive and vacuum molding. The method of fabricating the panel is described in detail. This invention is an improvement on U.S. Pat. No. 4,014,314.

Abstract: A solar energy collector system having high energy collection efficiency simultaneously heats separate gas and liquid streams flowing through the collector. The gas flows in a tiered passage sunward of the liquid passage. Exposure times of gas and liquid are regulated by separate thermostatic controls. The heated gas and liquid may be used as energy imput for space heating, hot water, air conditioning, etc., separately or in combination.

Abstract: A solar collector having a central radiation receiver and a plurality of mirrors mounted on articulated mounting structures arranged over a surface in an array pattern comprised of discrete paths, with the path shapes having certain prescribed symmetry properties. Using mathematical properties of tilt angle components expressed relative to fixed orthogonal axes of resolution for mirrors oriented to reflect solar radiation onto the radiation receiver, mirror control is accomplished by the use of coupling devices which extend along the discrete mirror containing paths. Each coupling device comprises a passive linear series system having an appropriate gradient of component values. The types of linear series coupling devices specifically considered in the disclosure are tensile elastic coupling devices and electrically resistive coupling devices for mirror control in large scale collectors, and torsional elastic coupling devices for mirror control in small scale collectors.

Abstract: An extruded solar collector formed of inexpensive material which may be used individually or readily assembled in groups in a series or parallel arrangement to form a panel by unskilled personnel with simple tools to provide an effective solar ray converter.

Abstract: A tank heater for a storage tank is provided with a fuel fired burner assembly, a heat transfer tube extending from the burner assembly a substantial longitudinal extent within the storage tank for the transfer of heat to the contents of the storage tank and a combustion chamber within the heat transfer tube adjacent the burner assembly, the combustion chamber being constructed in the form of a plurality of concentric tubes in a configuration to control the rate of heat dissipation.

Abstract: Apparatus for collecting body fluids at an internal cavity of the body of a living being. An enclosure is introduced into a body cavity with the enclosure in a contracted or evacuated condition. The enclosure has structure permitting body fluid to enter into the enclosure but not to flow out of the latter. A suitable triggering structure is provided to respond to the presence of a body fluid in order to trigger the release of the enclosure for collection, whereupon the enclosure sucks body fluid into the interior of the enclosure, with the enclosure having a structure such as a one-way valve which provides conditions permitting the fluid to flow into the enclosure but not to flow out of the latter. Thereafter, the enclosure is removed from the body cavity so that information can be obtained with respect to the fluid which is collected in the enclosure. The enclosure preferably contains an additive for providing a predetermined desired result with respect to a collected body fluid.

Abstract: The apparatus of the invention comprises means for examining the human eye for the onset of glaucoma. The eye undergoing examination forms one plate of a virtual capacitor the other plate of which is formed by a gas nozzle. The body of the person undergoing examination and the gas nozzle are connected to the input of a signal converter the output of which is sampled at a predetermined instant by a sampling and sample-holding means. A gas jet from the nozzle is directed at the eye and a sample made of the output of the signal converter. An indicator connected to the sampling and sample-holding means provides a measurement of the deformation at the surface of the eye caused by the dynamic pressure of the gas jet. Sampling may be carried out at moments determined by the systolic rhythm of the person being examined. Preferably samples are taken at the systolic and diastolic moments thereof, the samples being compared to give an indication of the dynamic performance of the eye.

Abstract: A blood sampling device includes an expansible, flexible container which, when unfilled, lies flat with its opposed sides together. The container is connected to a support having a passage for connecting the container with a needle cannula. A manually operable valve is disposed between the passage and the container. A gas vent communicates with the passage and has a hydrophobic filter for allowing air in the needle and passage to escape without entering the collection chamber of the container. The container has an isolation chamber at the proximal end for isolating air or air bubbles that might enter the collection chamber as a result of error in sampling technique. By hand manipulation of the container, such air bubbles can be moved from the collection chamber into the isolation chamber to isolate the air bubbles and prevent further absorption of oxygen from such air bubbles into the blood sample in the collection chamber.

Abstract: Body fluid pressure is monitored by implanting a sensor in the body which is responsive to the pressure therein. The sensor communicates with radiopaque means which changes its position when there is an abnormal amount of pressure as compared to a normal amount of pressure whereby the change can thereby be detected by X-Ray and translated into a value indicative of the pressure, thereby permitting serial, comparative, reliable and permanent recording in a relatively inexpensive manner.

Abstract: A method of determining the instantaneous arterial blood pressure of a subject which is a living being without utilizing entry of a needle or the like along an artery is capable of a high degree of accuracy and comprises the steps of applying a pressurizable device in the region of an artery and controllably pressurizing that device with fluid to an extent sufficient to eliminate arterial wall movement without collapse of the artery, the fluid pressure in the pressurizable device being monitored and providing a measure of the instantaneous arterial blood pressure of the subject. A preferred form of pressurizable device is an annular ring or cuff comprising a rigid body of annular shape over the inner surface of which is stretched a latex membrane which is pressurizable with distilled water.

Abstract: An indwelling multi-contact plunge electrode to measure the electrical output from areas of the myocardium on an individual, sequential or combination composite basis. The electrode comprises an outer flexible tube containing a plurality of wire leads having their distal ends projecting angularly through the wall of the tube adjacent the distal end thereof and their proximal ends connected to an electrical plug. The distal end portion of the electrode is stiffened and bent at a substantial angle to the proximal portion and the void in the lumen of the tube not occupied by the wire leads is filled with silicone rubber.

Abstract: A hip fracture nail device includes a telescopic nail for fixing the broken hip joint portions of the femur together and a retaining plate to which the nail is angularly secured in longitudinal sliding relationship at an angle of approximately 150.degree. by a slanted bushing. The retaining plate has strong triangular prongs which engage within corresponding grooves in the sides of the bushing, which facilitate retention, removal, and sliding adjustment between them. The retaining plate is affixed to the shaft of the femur by a row of bone screws. The nail is manipulated by a tool connected to the inner end of the nail inserted through an aperture in the retaining plate. The nail is maintained at an adjusted distance from the bushing and plate by frictional engagement of a C-shaped retaining spring disposed between the outer wall of the nail and the inner wall of the bushing.

Abstract: A belt-type restraint device, for restraining a person, has a belt for forming a girdle about the waist of the person and restraint means for securing the wrists of the person to the front of the belt. The restraint means are formed of loops continuous with the webbing of the belt to allow a single latching buckle at the back of the belt to simultaneously adjust and lock both the belt and the loops.

Abstract: A suit for the protection of a wearer's body and head from heat and gas comprises an inner suit adapted to cover the wearer's body and head and having a tubular flow channel therethrough for the passage of a cooling liquid such as silicone. An outermost suit overlies the innermost suit and it has a body covering and a head covering portion. The head covering portion includes a face mask. A heat exchanger is mounted so as to connect into the outermost suit and includes a coolant chamber for containing a vaporizable coolant therein. The vaporizable coolant such as carbon dioxide is maintained under pressure and the cooling liquid is circulated into heat exchange relationship therewith so as to cool down the wearer's body. In addition the device includes a respirator for circulating respiratory air to the face of the wearer which advantageously includes a passage adjacent the heat exchanger so that the incoming air may also be cooled if desired.

Abstract: A breathing equipment for high altitude flights comprises a breathing mask provided with a breathing gas regulator capable of supplying breathing gas under pressure and a helmet. The helmet is provided with means which, if the pressure of the breathing gas supplied to the mask is higher than the ambient pressure by an amount exceeding a predetermined threshold, subject those organs of the head which are particularly sensitive to the pressure differential to a gas over-pressure sufficient to avoid physiological troubles.

Abstract: A full-length, anti-embolism stocking extends over a wearer's leg and is adapted to exhibit a controlled, graduated compressive force on the leg. The compressive force is greatest in the ankle area and diminishes over the length of the stocking to a minimum at the top. Three distinct and defined sections make up the stocking, a lower section covering the calf and foot has a one-way stretch in a circumferential direction, an upper section covering the thigh also has a one-way stretch in a circumferential direction, and an intermediate section covering the knee has a two-way stretch. The knee and calf-foot sections comprise a fabric formed with a jersey stitch incorporating an elastomeric yarn. In the knee section the elastomeric yarn is knit-in to provide the two-way stretch and in the calf-foot section it is laid-in to provide only a one-way, circumferential stretch.

Abstract: A system for storing a dry powdered drug component and a liquid in separate containers and mixing them immediately prior to injection. The system has a hypodermic syringe with an axially slidable stopper, and the syringe is coupled to a rigid tubular housing with a low friction vacuum movable piston. Simple reciprocation of the syringe stopper with an attached plunger having a laterally extending thumb pad or other graspable slip resistant surface automatically reciprocates the housing's low friction piston and causes quick and complete turbulent mixing. There is no need to turn the device over and over in the operator's hands to alternately squeeze or push opposite ends of the device.

Abstract: A ligature carrier for use in a suspensory-type operation known as the Revised Pereyra Procedure, which corrects prolapse of the bladder neck in women. The ligature carrier comprises an angulated needle with two aligned striated flat handles, one slidable in a brace with respect to the other to extend and retract the needle. When retracted the angulated end of the needle protrudes about 3 cm; the aligned handles provide improved control to penetrate the abdominal fascia and orient the needle thereafter. In the operation the tough fascia is so penetrated, the carrier suitably redirected, and the needle extended out through the vaginal opening by sliding the needle handle in the brace. Sutures are then threaded through the eye at the needle tip and the needle retracted.

Abstract: Cardiac monitoring apparatus comprising a first external unit for transmitting electromagnetic energy within the patient's body to be received by a second, surgically implanted unit within the patient's body and adapted to be solely powered by the transmitted electromagnetic energy. The internal unit includes a monitoring circuit connected via electrodes coupled to first and second sites of the patient's heart, for providing corresponding first and second signals to be first time multiplexed and then pulse-width modulated before being re-transmitted to the external unit. The external unit decodes the transmitted signals to provide diagnostic quality signals indicative of the patient's EKG.

Abstract: A smoking device is provided which is hand operated and does not require suction or mouth contact.

Abstract: A device usable to aid attachment of an artificial fingernail to a natural fingernail comprises:(a) a form having a upwardly convex surface and defining an arcuate rearward edge shaped for reception under the forward edge portion of the natural nail, and(b) a holder having two laterally spaced tines respectively supporting lower portions of the form, said tines being bendable into selected set configuration,(c) the holder including generally tab shaped finger grips integral with said tines and adapted to resiliently grip opposite portions of a finger or thumb carrying said natural nail to support the form in a position wherein said form rearward edge is retained under said forward edge portion of the natural nail and adjacent thereto.

Abstract: A coin selecting and counting machine of reduced size, in which a plurality of coin selecting units are stacked one above another to have a common axis so that coins having the larger diameters may be selected step by step by the higher coin selecting units. The coins thus selected in accordance with their various denominations can be selectively deposited into different containers after their respective numbers have been counted. Each of the coin selecting units includes a rotatable disc made rotatable on the common axis, a separating ring arranged in a stationary position coaxially above the rotatable disc and partially removed to form a coin outlet opening, a coin selecting path leads from this opening and coin selecting rails are arranged at both sides of the path for selecting such coins having a diameter larger than a preset level.

Abstract: A dishwasher has a unitary spray and deflector disc member in spaced relation with its wash chamber top wall of a diameter so as to extend a sufficient distance across the chamber to intercept upwardly directed sprays of water. A diametrical spray conduit is incorporated with the disc including inlet means for accepting water from a top wall feed line for flow into two radial discharge streams to maintain the conduit full of water while exiting spray port means at each end of the conduit cause rotation of the disc. The water entering the disc inlet means and exiting the spray port means imparts stability to the disc to reduce the sound level within the chamber caused by impinging sprays thereon.

Abstract: A pneumatic control instrument includes a nozzle-flapper system having improved dynamic response characteristics under vibrational conditions. A light-mass, compliant flapper having a high natural frequency covers the nozzle and serves to cushion the impact of the nozzle striking the flapper by moving at the same amplitude of vibration as the nozzle so as to precisely track the nozzle over a wide range of vibrational frequencies and amplitudes.

Abstract: A check valve having a semi-spherical valve member movable longitudinally in a generally tubular housing between a closed position engaging a conical valve seat and an open position spaced longitudinally therefrom, the valve member being slidably mounted for such movement on a longitudinally extending support element. The opening in the valve member which receives the support therein has a diameter significantly greater than the diameter of the support element whereby the valve member is pivotal thereon so as to seat properly on the valve seat. The center of the semi-spherical valve member is longitudinally spaced in one direction from the effective center of support thereof at the closed position of the valve member, and is longitudinally spaced in the opposite direction from the effective center of the valve member at the open position of the valve.

Abstract: There is disclosed a self-actuated pilot-controlled pressure-responsive valve for fluid pressure systems wherein the main valve is arranged to be seated by the fluid pressure in the system and a normally balanced piston and cylinder assembly pulls the main valve from its seat in response to elevated system pressure in a spring-loaded, tandem pilot and stabilizing valve assembly which in turn establishes a driving pressure differential across the piston, with the initial unseating of the pilot valve occurring substantially independently of the stabilizing valve which thereafter closes to hold the pilot valve open until reduced system pressure is achieved. At this time, the tandem valves operate as one with the pilot valve closing and the stabilizing valve opening against a force derived from system pressure through a conduit having a metering orifice which effects a pressure drop in the tandem valve assembly which insures full and chatter-free operation until the main valve is again closed.

Abstract: A respirator valve for respirators with a pressure-responsive control of the breathing pulses of a patient, comprises, a valve housing which has a pressure chamber therein with a connecting breathing line to the patient. First and second control diaphragms close respective sides of the pressure chamber and are flexible in response to pressure variations in the pressure chamber. A connecting member disposed between the diaphragms is moved by the flexing of the diaphragms so as to operate a lever mechanism for shifting a valve member to open or close a valve seat in a connecting line to a pressurized breathing gas for supplying the breathing gas into the pressure chamber and into the patient in accordance with variations in the patient's efforts to inhale and to cause pressure variations in the pressure chamber to actuate the diaphragms.

Abstract: A fluid pressure shock absorbing valve is mounted between an oxygen supply tank and a fluid pressure regulator in a supply system such as that for welding torches. The valve includes a housing slidably supporting a valve member having a head biased to seat in the direction of flow from the tank to the regulator to normally close the valve. The valve member has a central flow passageway extending thereinto from the downstream end, and a restricted passageway extends through the head and opens into the flow passageway to bleed fluid through the head when the latter engages the seat. Radially extending passageways open into the flow passageway downstream from the seat. When the supply tank is opened, flow through the restricted passageway allows for gradual pressurization of the regulator and an eventual build-up of pressure to displace the valve member from the seat to allow full flow past the seat and into the flow passageway through the radial passages.