Abstract: A three-stage sorption type cryogenic refrigeration system, each stage containing a fluid having a respectively different boiling point. Each stage includes a compressor in which a respective fluid is heated to be placed in a high pressure gaseous state. The compressor for that fluid which is heated to the highest temperature is enclosed by the other two compressors to permit heat to be transferred from the inner compressor to the surrounding compressors. The system may include two sets of compressors, each having the structure described above, with the interior compressors of the two sets coupled together to permit selective heat transfer therebetween, resulting in more efficient utilization of input power.

Abstract: On a liquid cargo tank of a barge, a pressure responsive pilot valve operates through a combination of levers to unlatch a main valve clamp arm. One lever is a latch arm having a first position engaging and retaining a latch stud mounted on the clamp arm, and having a second position free of the latch stud whereby the clamp arm is released. A latch hook normally retains the latch arm in the first position but is operable to a second position to free the latch arm from the restraint of the hook. A pilot-operated trigger arm is operable on the latch hook to move the latch hook from the latch arm retaining position to the latch release position. The trigger arm also is able to directly engage the latch arm for unlatching it if not already unlatched immediately upon freedom from restraint of the hook. The main valve seal disk is held closed under a spring-load by the clamp arm.

Abstract: A magnetic refrigerator comprising a magnet generating a high-intensity magnetic field, a tube-shaped superconducting magnetic shield, a magnetic working material and a reciprocating means for reciprocatively moving the superconducting magnetic shield or the magnetic working material, the magnetic refrigerator being arranged such that a magnetization process wherein the magnetic working material is magnetized in the high-intensity magnetic field and a demagnetization process wherein the magnetic working material is demagnetized by being accommodated in the hollow section of the magnetic shield are repeated by the reciprocating means so that the magnetic working material generates coldness.

Abstract: A pneumatically actuated drain valve device for venting the moisture in an air dryer to atompshere including a rolling diaphragm for linearly moving a piston stem assembly to unseat a spring and pressure biased stainless steel ball valve from its conically shaped valve seat to permit the collected moisture in an accumulation chamber to pass through a sintered exhaust muffler to the atmosphere.

Abstract: The present invention provides a valve control apparatus which can be programmed to deliver a desired flow of gas. A valve 22 is connected to a stepper motor 28 which is controlled by a computer 32 to open or close the valve in steps within a gas flow line 24 to deliver a desired rate of flow. A flowmeter 30 is provided along the gas flow line 24 for measuring the flow and inputting this flow to the computer 32. The computer 32 calculates rate of flow information obtained from the flowmeter 30 and controls the stepper motor 28 to open or close the valve 22 as necessary in accordance with the received rate of flow information and a desired rate of flow preprogrammed into the computer 32. As a result, a precise desired rate of flow can be obtained. Also, position indicators 34 may be added to the valve 22 to indicate when the valve 22 is completely open or completely closed. The valve 22 may be provided with a return spring 36 to automatically close the valve 22 in the event of a power loss.

Abstract: A screw-in throttle valve and pressure gauge assembly including a valve member and a selectively rotatable screw-in member operatively associated with the valve member for permitting selected positioning of the valve member with respect to a valve seat. The screw-in valve member supports a pressure gauge at a location outside the valve body and the valve member is formed with a capillary bore communicating between a first flow duct downstream of the valve seat and the pressure gauge so that when the screw-in member and valve member are selectively positionable for varying the gap between the valve seat and valve member the valve gauge is simultaneously moveable with the valve member and screw-in member for directly measuring the pressure at the first flow duct without alteration of the pressure gauge.

Abstract: An intermediate partition plate is provided between a plurality of adjacent cylinders to partition cylinder chambers in the cylinders from each other. A guide opening portion, in which respective cylinder abutting surfaces are open, is formed in the intermediate partition plate at a position on an outer side than a cylinder circumferential surface, and a slider is housed to be reciprocated. Gas is guided from the cylinder chambers during compression to the guide opening portion through first and second notches to apply the pressures of the cylinder chambers to the slider. A back pressure is applied to the slider from a back pressure pipe to move forward or backward the slider by a difference pressure between the back pressure and the cylinder chamber pressures. The slider shuts off the cylinder chambers from each other or escapes from the first and second notches to cause the cyliner chambers to communicate with each other through the first and second notches and the guide opening portion.

Abstract: A female member with an internal fluid shut-off is mounted to a panel and has a bore for receiving a male member. The male member has a nose for insertion into the female portion such that it automatically opens the shut-off. The male member includes an internal flow-rate control valve and a latch for quick-disconnect from the female member.

Abstract: An environmental control system for ground vehicles and low flying aircraft that supplies purified and conditioned ambient air to the vehicle's crew compartment is provided. The system integrates catalytic and particulate filters, that remove nuclear, biological, and chemical warfare agents from ambient air, with a source of compressed ambient air, and an air cycle refrigeration unit.

Abstract: An air-oil full hydraulic reservoir tank of the type used with a vehicle lift system. The tank includes a tank wall forming the tank and a discharge pipe within the tank. The discharge pipe includes an inlet tube portion, an outlet tube portion, each extending through an upper portion of the tank, and a connection, such as a connecting loop portion or a passageway in a casting, within a lower portion of the tank, that joins the lower ends of the inlet and outlet tube portions. A low oil control mechanism within the tank blocks the flow of hydraulic oil from the inlet tube portion to the outlet tube portion when the level of the oil is below a predetermined level, thereby preventing the flow of air through the outlet tube. The inlet tube may be perforated, and the low oil control mechanism may be a float within the inlet tube that rests on a valve seat to block the flow of air into the outlet tube. A connecting pipe joins the reservoir tank to a hydraulic lift cylinder, with interposed control valves.

Abstract: A valve assembly operable to fill a container with pressurized gas from a source thereof and to vent the cylinder and associated passage means in the valve assembly to atmosphere, the cylinder having a valve with a valve member spring biased to a closed position. The valve assembly has a valve housing within a main chamber, a supply port connectable to a source of pressurized gas, a fill port connectable to a cylinder to be filled, and a vent port communicating with the atmosphere, the supply port, fill port and vent port communicating with the main chamber. A valve body is mounted in the main chamber for movement therein and having a first passage operable in a first position of the valve body to connect the fill port to the vent port, a second passage operable in a second position of the valve body to connect the supply port to the fill port, and a third passage operable in a third position of the valve body to connect the fill port to the vent port.

Abstract: An air conditioning installation for a motor vehicle is of the kind comprising an evaporator having an inlet branch and an outlet branch, arranged substantially horizontally and one above the other, with each branch having a radial bead. An expansion chamber is removably but sealingly attached to the branches by an anchor plate which is fastened by a screw so as to bear on the beads so that the latter compress seals against receiving surfaces of the expansion chamber. The anchor plate is in the form of an elongated plate having two through slots which are open at opposite ends of the plate and in which the two branches are supported. Each slot has a semi-circular base portion fitting the circumference of the corresponding branch of the evaporator, and each of these base portions is extended substantially tangentially to define parallel edges of the slot.

Abstract: Apparatus for dilution of one liquid with another, such as a pesticide concentrate diluted with water, wherein dual piston displacement pumps are each actuated respectively by a coil spring and by an opposed hydraulic actuator with a piston powered by the flow of the diluting liquid, the hydraulic actuator being controlled by a control means for alternating reciprocation of the respective pistons of each hydraulic actuator responsive to the rate of flow of the diluting liquid so that a constant dilution ratio is maintained regardless of the pressure of the liquid supply. The control means includes a vane that is pivoted alternately by the action of the hydraulic actuator pistons to direct the flow thereto of liquid for dilution.

Abstract: A high turndown mass flow control system for the regulation of gas flow to a variable pressure system such as a gas turbine engine. The herein described system controls the flow of gas into a load system where the gas delivery pressure at the load varies directly as a function of the mass flow. The system employs flow control and mass flow measurement subsystems, controlling the mass flow to maintain a mass reference value called for by an outside master control. Flow control apparatus includes a throttling control valve while the flow measurement subsystem includes a flow restriction element, .delta.P, pressure and temperature transducers while using a flow calculation algorithm to calculate the actual gas mass flow passing through the system. The high turndown mass flow control characteristic of the invention acquired by an unique placement and usage of the gas restriction element allows the reading of .delta.P parameters with conventional instrumentation.

Abstract: A back-up butterfly valve installed in a sewer pipe which will automatically close when sewage water back flows due to heavy rains thereby preventing sewage-laden liquids in the lower levels of residential homes and commercial buildings. The valve is motor actuated and is controlled by a liquid sensor disposed downstream. A clock is utilized to actuate a system by which the valve is opened and closed periodically preventing the valve from sticking or freezing which would leave the valve inoperative.

Abstract: An apparatus having an automatic purge valve assembly for draining condensate out of a compressed air storage tank. An air pressure switch, upon the presence of a predetermined atmospheric pressure in the air storage tank, will energize a relay which in turn enables a solenoid to open a purge valve, thus allowing any condensate present in the tank to be automatically drained through and out of an air outlet conduit to which the purge valve is attached. The relay shuts off automatically after only a brief period in order to quickly close the purge valve and thus avoid having a substantial amount of compressed air escape along with the condensate.

Abstract: An apparatus for pulsing water flowing to a shower head includes a housing with a chamber, first and second water inlets to the chamber and a water outlet. The second inlet and the outlet are located through a wall of the housing at one end of the chamber. A valve has a plate with a plurality of apertures. The valve disposed within the chamber so that water flowing through the first inlet urges the valve into close proximity to the housing wall where rotational movement of the valve alternately opens and closes the water outlet. That action creates a pulsed flow of water through the outlet. Water flowing into the chamber through the second inlet moves the valve plate away from the housing wall permitting water to flow continuously from the second inlet into the outlet without being pulsed. A mechanism is coupled to the valve to produce the rotational movement.

Abstract: A fluid containment apparatus including first, second and third protective recessed wells. A first fluid flow device is positioned in the first well, a second fluid flow device in the second well, and control equipment in the third. First and second control conduits passing through the fluid compartment connect the control equipment with the first and second devices, respectively.

Abstract: The output from the sensor detecting the flow rate of the fluid passing through the conduit is compared with the ceiling value and the appointed compensating signal is added to the output from the sensor to display the signal obtained on the basis of this addition result as the value of flow rate or reduce the openness of the control valve on the basis of the above described signal when the output from the sensor is larger than the threshold value, so that the mass flow meter can accurately display the flow rate even when the fluid passes in an excessive flow rate. In addition, even though the mass flow meter and the mass flow controller are fallen into the abnormal operating condition due to an excessive flow rate of fluid, they can be quickly returned to the normal operating condition.

Abstract: A device for regulating the flow of air through a heat exchanger has a multiplicity of shutters pivotally mounted on parallel axes and actuated by control means that include an actuating plate which carries a number of cam tracks of selected shapes. Each cam track is arranged to engage a corresponding cam which is fixed to a respective one of the shutters for rotating the latter when the actuating plate is moved. The invention is especially applicable to motor vehicle engine cooling radiators.