Showing papers on "Bellows published in 1968"

Respiration testing apparatus

Abstract: A respiration testing apparatus suitable for use in pulmonary function analysis. The apparatus includes an outer casing and a horizontal bellows which has a fixed end plate secured to the casing and a movable end plate supported by an elongated, horizontally extending rod which passes through the center of the movable end plate and is secured thereto. A breathing tube extends through the casing and the stationary end plate into the bellows. The support rod is slidably supported for horizontal movement by a pair of rollers, one of which is rotatably mounted on the casing adjacent one end of the rod and the other end of the rod. The first end of the rod carries a stylus which describes a recording chart to record movement of the rod and the bellows as air is drawn into and removed from the bellows through the breathing tube.

Stirling cycle amplifying machine

Abstract: Constant volume regenerative, or Stirling, cycle thermal amplifying machine having an independently oscillated regenerator. Small amount of input energy is used to oscillate the regenerator. These oscillations produce large output pressure pulses which are adapted to drive a device, such as a pump, producing a large amount of output energy. Working fluid in machine is gas in one version wherein a bellows responsive to the pressure pulses of the gas is utilized to drive the pump, and is liquid in another version wherein the bellows can be omitted and the pressure pulses of the liquid is directly utilized to drive the pump.

Pressure absorbing appliance for treating hydrocephalus

Abstract: An expansible bellows having a variable internal volume is mounted in a housing adapted for implantation in the skull of a patient suffering from hydrocephalus. A tube extends from the bellows for insertion into a ventricle of the brain. When so installed, the bellows is filled with ventricular fluid at an average or static pressure. Pulsation of choroid-plexus blood vessels in the brain tends to cause a periodic increase in fluid pressure, but bellows expansion in response to increased pressure minimizes the actual increase in fluid pressure. The resulting suppression of pulsatile pressure peaks and dissipation of energy by the bellows appears to be an effective technique for treating hydrocephalus.

Attitude insensitive gas generator

Abstract: A GENERATOR HOUSING IS FORMED WITH ONE OR MORE BELLOWS SECTIONS SO THAT A LIQUID REACTANT IS CONFINED WITHIN THE HOUSING BY THE BELLOWS REGARDLESS OF THE ANGULAR ORIENTATION OF THE GENERATOR. A SOLID BODY PROVIDING A REACTION SURFACE IS CENTRALLY MOUNTED WITHIN THE ENCLOSURE. UPON CONTACT OF THE LIQUID REACTANT WITH THE SOLID BODY A GAS IS GENERATED, BUT CONTACT IS DESTROYED BY EXPANSION OF THE BELLOWS. A PLURALITY OF GAS OUTLETS ARE PROVIDED WITHIN THE HOUSING SO THAT IF ONE IS SUBMERGED BY LIQUID REACTANT, THE REMAINING OUTLET WILL REMAIN EXPOSED FOR THE EDUCTION OF GAS.

Pneumatic arrangement for transferring articles

Abstract: A PNEUMATIC ARRANGEMENT BY WHICH AN ARTICLE IS RAISED THROUGH THE APPLICATION OF A SUCTION FORCE. THE RAISING SUCTION FORCE IS GENERATED THROUGH THE CONTRACTION OF A BELLOWS WHICH EXPELS THE AIR FROM ITS INTERIOR, AND THE SUBSEQUENT EXPANSION OF THE BELLOWS SO AS TO CREATE A PARTIAL VACUUM WITHIN THE INTERIOR. THE BELLOWS IS BROUGHT INTO CONTACT WITH THE ARTICLE TO BE RAISED PRIOR TO THE CONTRACTION AND EXPANSION PROCESS. A SPRING ADJUSTMENT DEVICE PERMITS ADJUSTMENT IN THE SUCTION FORCE SO THAT THE VACUUM WITHIN THE BELLOWS BECOMES NEUTRALIZED WHEN AN ARTICLE HEAVIER THAN A PREDETERMINED WEIGHT ADHERES TO THE BELLOWS. THE VACUUM WITHIN THE BELLOWS IS ALSO GRADUALLY NEUTRALIZED WHEN THE ARTICLE IS TO BE REDEPOSITED AFTER BEING RAISED SO THAT THE DEPOSITING PROCEDURE IS ACCOMPLISHED IN A GRADUAL MANNER FOR THE PURPOSE OF PROTECTING FRAGILE ARTICLES.

Vacuum-insulated valve

Abstract: A valve for controlling the flow of cryogenic fluids has an inner housing and an outer housing with a vacuum space between the two housings, a valve and seat within the inner housing, and a valve stem extending outward through and sealed to a first bellows of the inner housing, through the vacuum space, and through and sealed to a second bellows of the outer housing.

Temperature-compensated pressure transducer

Abstract: 1,242,967. Fluid pressure actuation of switches. CAPVEST VENTURE CORP. 5 Aug., 1969, No. 39119/69. Heading H1N. A pressure-sensitive temperature-compensated switch assembly 10 includes a switch 21 in a closed volume 22 adapted to retain a reference pressure, the sensed pressure P acting on a flexible diaphragm 18 to actuate the switch 21, and a temperature compensating assembly 23 changing the reference volume with ambient temperature change to keep the reference pressure constant. Assembly 23 comprises two movable members of different effective working area such as the end sections 24a, 25a of bellows sections 24, 25, the ends 24a, 25a being coupled by a tie rod 27 to move as one when their common liquid-filled volume 28 expands or contracts with temperature rise or fall, the reference volume 22 thus being enlarged as a function of increasing temperature as bellows 24 contracts and bellows 25 expands. Analogous assemblies using a differential piston assembly, Fig. 2 (not shown), or two diaphragms, or a diaphragm and bellows assembly, Fig. 3 (not shown), are described. Volume adjusting screws 22b and 29b are provided for adjusting the reference volume 22 and a back-up volume 29 respectively. The volume 29 can be vented, and a spring 'inserted between the end 25a of bellows 25 and the base 12 of the housing 11 to provide biasing for the bellows 25. Switch 21 is a snap switch or an ordinary retractive switch.

Relief valve with altitude compensation

Abstract: A RELIEF VALVE OF THE PRESSURE RESPONSIVE POPPET TYPE WHICH IS CONNECTED TO AN ALTITUDE RESPONSIVE BELLOWS SO AS TO BE HELD OPEN BY THE COLLAPSED BELLOWS AT SEA LEVEL AND SO AS TO BE DIVORCED FROM THE OPERATION OF THE BELLOWS AND ACT AS A TRUE PRESSURE RESPONSIVE POPPET VALVE INDEPENDENT OF THE BELLOWS DURING ALTITUDE OPERATION

Engine cooling control device

Abstract: A pressure-responsive fluid-shear coupling for an automobile engine fan. The pressure increase with increasing temperature of a circulating liquid coolant in the cooling system acts directly against a bellows. The bellows in turn controls the flow of a silicone fluid and the degree of coupling between the engine and the fan.

Device for the evacuation of air for apparatus of the type of brush or comb with bellows

Abstract: The present invention relates to a device for apparatus of the type of comb or brush with bellows permitting it to send at least a part of the air pulsed parallel to the axis of the comb or of the brush and outside of their body.

Numerical Method for Nonlinear Axisymmetric Bending of Arbitrary Shells of Revolution and Large Deflection Analyses of Corrugated Diaphragm and Bellows

Abstract: A numerical method which can be applicable to the nonlinear axisymmetric bending of arbitrary shells of revolution is proposed. It is based on the iterative scheme and the finite difference approximation, and is found to show good convergence and to be practical. Using this method, the large deflection problems of the corrugated diaphragm and bellows are solved. The results show the unnegligible nonlinear effects and the limitations of the linear theory and the approximate nonlinear solution now used.

Animated toy figure

Abstract: Animated toy figure, of the doll or puppet type, capable of producing at will the realistic and different movements of the lower limbs comprising, symmetrically relative to the longitudinal axis of said figure, an upper limb which may be articulated, deformable under pressure and playing the role of an air syringe, connected inwardly by a tube to bellows bearing on the one hand on an inner stationary part of the body of said figure and, on the other hand, on a lever extending, inside said body, the homologous lower limb of the upper limb beyond its articulation axis. The upper limb, the connecting tube and the bellows are made of a flexible, elastic and airtight material.

Environmental space suit toy

Abstract: A toy comprising an astronaut figure, a space capsule around the upper portion of the figure, pneumatically operated tools mounted on the capsule, an air pump, and tubes for coupling the pump to the tools, the tubes passing through the capsule to provide the appearance that the astronaut figure is controlling tool operation One grasping tool has jaws operated by a bellows that is expanded by air pressure Another tool includes a thrust element mounted on the inner turn of a spirally wound band, the spiral expanding lengthwise when pressured air is applied to it

Single acting follower heart assist device

Abstract: 1,253,928. Heart assist pump. UNITED STATES ENERGY COMMISSION. 8 Dec., 1969 [24 Dec., 1968], No. 59769/69. Heading A5R. [Also in Division F1] A heart assist pump for either implanted or external application in series with the heart and aorta, comprises a main body 14, and inlet and outlet tubes 12, 16, preferably constructed from polyurethane, and a pair of flexible walls 28, 32 attached to a piston head 34 dividing the body 14 into two chambers 24, 26 and connected to a controlling means by a rod 36 for synchronising the pump with the heart. A left ventricle pulse forces blood to flow along tube 12 through check valve 38 into chamber 24. The pressure compresses a bellows 78 connected by a fluid line 22 to a second bellows 76, which expands moving rod 82 upwards. Rod 82 is linked by a pin 84 to a rod 86 linked by pins 74 and 56 to rods 72, 36 respectively. The rod 86 lifts rod 72 and spool valve 58, allowing a fluid under pressure to pass from a manifold 73, through ports 64, 68 into the chamber above a control piston 52 mounted on the rod 36. The pressure increases and the control piston 52 is forced downwardly against a biassing spring 54 in a cylinder 48 and so forces the piston 34 and walls 28, 32 down, closing valve 44 and forcing blood from chamber 26 through valve 42. At the end of the left ventricle pulse, the pressure in chamber 24 drops, allowing bellows 78 to expand, which operates the spool valve 58 to allow the fluid in the chamber above the piston 52 to vent through ports 68, 66 to return the pistons 52, 34 to their starting positions. Valve 38 closes and blood is forced from chamber 24 to chamber 26 through the open valve 44.

Lifting device operated by bellows

Abstract: A reversible lifting device has an inflatable and deflatable bellows as a drive and catches which engage in recesses of a guide pole. A rigid frame which can be connected to the load acts as one abutment for the bellows. A double-ended lever arm is pivotably mounted on the frame, has the other bellows abutment at one end and one of the catches at its other end.

Low Temperature Force Generating Apparatus Using Sylphon Bellows

Abstract: An apparatus is described in which a Sylphon bellows is used to generate pressures to 3400 atm or uniaxial forces to 1150 kg in the liquid helium temperature range without the use of mechanical compressors Correction factors, operating procedures, and practical limitations of the design are discussed The shift in transition temperature of indium is given as a test of the overall behavior of the apparatus

Improvements in servo systems and control devices therefor

Abstract: 1,099,281. Fluid-pressure servomotor systems. MOLINS ORGANISATION Ltd. Jan.13, 1965 [Jan.14, 1964], No.1618/64. Heading G3P. [Also in Division F2] A valve actuator comprises a plane disc (1), Fig. 1 (not shown) which contacts or is fixed to three valve actuators (2), (3) and (4). The disc is movable in a direction normal to its plane and is tiltable. The force imparted to the actuators is dependant on the point of application of the force to the disc. For example if the actuators are arranged at the corners of an equilateral triangle and on a circle concentric with the disc, a force applied at the centre of the disc is shared equally among the actuators but if the force is applied on a line between two of the actuators, the disc tilts about the third actuator and the force on the two actuators is the reciprocal of the ratio of the distances between the point of application and the two actuators. The actuators may be applied to springs or, as shown, to telemotors. The actuator 2 may be a bellows, Fig.2, connected to a further bellows to actuate a valve 9 controlling the supply and exhaust to a jack 13. The jack 13 acts as the gripping device of an artificial hand to grip an object 15 between the jack and a fixed member 16. A resilient member 21 is carried by the member 16 and the force of the jack is transmitted through a member 17, bellows 18, a fluid link 19 and bellows 20 to recentre the valve 9. An accumulator 22 may be provided in the fluid link or this fluid link may be replaced by a spring. The other two actuators may control servosystems for moving the arm transversely and longitudinally. The jacks may be replaced by rotary motors.

Hydropneumatic shock absorber provided with elastic bellows separator of working fluids

Abstract: A TELESCOPIC-TYPE HYDROPNEUMATIC SOCK ABSORBER HAVING A GAS CONTAINING ELASTIC BELLOWS MEMBER WHICH COMPRISES A CYLINDER PISTON UNIT, A MOVABLE PISTON DISPOSED THEREIN HAVING BOTH ROUND COMPRESSION AND EXTENSION LEAF SPRINGS, HOLES THEREIN COVERED BY THE ELASTIC ACTION OF SAID LEAF SPRINGS AND ELASTIC BELLOWS SEPARATING TWO FLUIDS THEREIN USED FOR THE SHOCK-ABSORBING ACTION, WHEREIN THE ELASTIC BELLOWS MEMBER HAD DISTRIBUTED ON ITS CONE RINGS THE STRESS ORIGINATED BY THE PISTON STROKE IN THE CYLINDER.

Improvements in and relating to conveyor means

Abstract: 1,123,085. Track brakes. DEMAT Ltd. 27 July, 1967 [9 May, 1966], No. 20538/66. Heading F2E. [Also in Division B8] A braking ramp 5 for a pallet 4 on a gravity rollerway is cantilevered upwardly from a framework tube la, the other end of the ramp being connected to a bellows 7 having a small leak orifice. When the pallet engages the ramp the latter is pressed down at a rate permitted by escape of air from the bellows. A non- return valve may enable the bellows to expand more rapidly after the pallet has passed. In a modification, Figs. 3, 4 (not shown), the ramp is pivoted at one end and is urged upwardly by a compression spring (12). In a further modification, pallets have wheels which run in tracks.