Showing papers on "Bellows published in 1973"

Bearing assembly systems

Abstract: A mid-span bearing support for the power take-off shaft of a fan type gas turbine engine is described. The power take-off shaft extends radially through frame struts in the core engine inlet and fan ducts of the engine. These struts are separated by a gap in which a bearing assembly is mounted to journal the power take-off shaft. This assembly includes a spring bellows which permits the height of the assembly to be reduced by a rotatable sleeve to permit retraction of interdigitating locating means in the installation and removal of the assembly. The spring bellows also provides sealing pressure of the assembly against opposed surfaces of the gap so that oil may flow through the struts and assembly for return to the engine's oil pump.

Multi-size adapters

Abstract: A versatile multi-size adaptor to be connected to a duct in a hot or cold air distribution system and having a box-like air discharge outlet in which an air diffuser can be mounted, and having an air inlet made in stepped sections of different size for enabling the same to be connected to one of several sizes of ducts to suit installation requirements A modified embodiment includes a bellows section between the air outlet and the stepped air inlet that can be axially compressed, or extended, and/or flexed so that the stepped inlet can be connected to a duct disposed at an angle to the outlet.

Assessment and Analysis of the Bellows Ventilation of Clothing

Abstract: A methodical approach is described, attempting to separate the loss of heat and moisture due to forced exchange of air inside clothing, when walking, from the loss caused by gradients between the b...

Pipe expansion and repair fitting

Abstract: A pipe expansion and repair fitting wherein the component parts are of plastic or the like. The component parts comprise a bellows arrangement having tapered tubular ends for fitting around and connecting two ends of the pipe and being extended or repaired. A flow tube assembled in the bellows reduces turbulence. A telescoping shield protects the bellows from the adverse effects of the surrounding environment.

Thermal coupling device for cryogenic refrigeration

Abstract: Coupling between a refrigerant source and a device to be refrigerated is mechanically accomplished at room temperature by a liquid metal-filled bellows between the refrigeration source and the device. When the refrigeration source provides cooling, the liquid metal freezes to provide inter-engaging clamping force and a conductive thermal coupling.

Magnetic pressure indicator for a container

Abstract: A temperature compensated pressure indicator adapted to be mounted within a pressure container includes a reservoir housing and housing member welded together to form a secondary pressure chamber. A bellows member is hermetically mounted within the secondary pressure chamber and communicates with the exterior pressure of the container. Mounted on the bellows member is a movable magnetic member adapted to slide on a hollow guide post as a result of any pressure differentials. A reed switch assembly is held stationary in the guide post by a pair of band springs. The switch assembly is electrically connected to a source of power and an external indicator such as a light. When the bellows member moves the magnetic member close to the switch assembly due to a pressure differential, the magnetic field closes the switch assembly to activate the light. The indicator is substantially non-responsive to wide variations in the ambient temperature.

Apparatus for transmitting force by hydraulic pressure

Abstract: A hydraulic pressure transmitter is connected by a flexible tube to a hydraulic actuator. The transmitter has a flexible bellows, with a closed outer end, whose interior defines a first chamber, has a cylinder, and has a piston reciprocable in the cylinder and defining therewith a second chamber, communicating with the bellows, and a third chamber communicating with the tube. The closed outer end of the bellows has a pressure plate thereon which is engaged by an operating button which can be depressed to collapse the bellows. A piston rod is secured to the closed bellows end and extends through a perforated rigid diaphragm into the second chamber, the inner end of the piston being shaped to sealingly engage in an aperture in an end wall of the piston. The piston is biased toward the piston rod by a spring, and has a small clearance with the cylinder walls for flow of hydraulic fluid therepast between the second and third chamber parts.

Lmfbr intermediate heat exchanger

Abstract: A heat exchanger of the shell and tube type and particularly adapted to employ liquid metal as the heating fluid is provided with a floating head for connecting the ends of the heat exchanger tubes whereby stresses on the tubes due to thermally induced differential movements between the tubes and the shell are prevented. A pair of mutually spaced expansion bellows are connected between the floating head and the shell to define a closed space within which an inert gas is maintained. The bellows pair provides a double barrier between the heating fluid and the fluid to be heated to prevent admixture of the two fluids while the inert gas space intermediate the bellows provides means for detecting a bellows failure enabling the ruptured bellows to be replaced without danger of mixing the two fluids.

Breathing indicator and ventilator

Abstract: The device indicates the instantaneous volume of gases being breathed by a medical patient, and provides a means for "ventilating" the patient; i.e. causing the patient to breathe artificially. A pair of bellows is provided. The first bellows is pneumatically connected to the patient's respiratory system. The first bellows expands when the patient exhales in a closed system, contracts when the patient inhales or gases are forced into the patient's lungs. The second bellows is mechanically coupled to but pneumatically isolated from the first bellows. The second bellows preferably is connected to a manual resuscitation squeeze-bag which can be used to expand the second bellows and thereby compress the first bellows and force gases into the patient's lungs, thus ventilating the patient. An automatic non-rebreathing valve is used to ensure independent operation of the second bellows and the bag. The bellows are mounted so as to expand and contract along an arcuate path. An indicator indicates the excursions of the first bellows, and thus indicates the instantaneous volume of flow. Movement of the bellows along an arcuate path provides mechanical amplification of the movement of the indicator, thus giving improved resolution and accuracy. A disposable liner is provided for the first bellows so that the bellows itself will remain isolated from the gases breathed by the patient, and will be relatively easy to keep clean. Preferably, the second bellows has a cross-sectional area considerably smaller than that of the first, so that only a relatively small flow of gas from the squeeze-bag is effective to force a substantially greater volume of gas into the patient's lungs. Thus, the double-bellows arrangement serves as an amplifier for the squeeze-bag. In one embodiment of the invention, the movement of the bellows is in a vertical plane, and in another embodiment the movement is in a horizontal plane. An accumulator is used to indicate the total flow of gas breathed by the patient, and a timing device is used to indicate the "minute volume" of ventilation, i.e., the flow rate. An especially advantageous bellows construction is used.

Receptacle for printed circuit board

Abstract: A connector which has bellows type contacts of spring metal and a holder which has a bottom, a longitudinal slot for receiving a circuit panel, a cavity for housing the bellows type contact, a hollow formed at upper portion of the cavity and partition wall for separating the adjacent contacts. The bellows type contact consists of a lower end portion, an attached portion, a first bent portion, a second bent portion, a straight portion, a third bent portion and an upper end portion. The straight portion is the portion contacting the panel circuit. The contact has a spring substrate which consists of phosphor bronze, a contact metal of tin or tin-lead alloy, and a layer of copper between the substrate and the contact metal. With the improved shape and material of the contact, there is provided better contact performance even for a contact of tin or tin-lead alloy which is very cheap compared to the conventional gold contact and it is thus advantageous for use in consumer type electric equipment.

Control of dust during handling of materials

Abstract: Apparatus for controlling dust produced during gravity chuteloading of dusty solids into ships comprises a base plate having a central aperture engaging the chute, a flexible skirt extending downwardly from the plate to enclose loaded solids, variablelength bellows surrounding the chute and connected at the bottom to the plate and at the top to an air de-duster, and openings in the plate providing access for dust-laden air from the loaded solids into the bellows.

Non-spillable liquid dispensing system

Abstract: A non-spillable fluid dispensing system having an arrangement for placing a fluid in a cavity provided in a container into communication with a medium surrounding the container. The pressure in the cavity is normally substantially the same as the pressure of the medium. A further arrangement is provided for selectively increasing the pressure in the cavity to a value greater than that of the medium for forcing fluid through the placing arrangement and out of the cavity. The placing arrangement may be either a passage formed in the wall of the container or a length of tubing, and a drinking cup having a drinking lip may be connected to an end of the passage or tubing outside of the container cavity. A bellows is arranged so that a compression of the bellows will increase the pressure in the cavity so as to force fluid in the cavity into the drinking cup. Releasing the bellows will return the cavity to its normal pressure and cause any fluid remaining in the drinking cup to be drawn back toward the cavity. In this manner, an accidental overturning of the container and similar unexpected events will not result in a spilling of the fluid, which may be a potable liquid.

Pneumatic means for production of molded structures

Abstract: Pneumatic means comprising a hollow mandrel or hollow tube having secured around its outer surface along the length thereof according to one embodiment, a flexible open-cell polyurethane foam sleeve and an outer skin formed of a flexible non-permeable plastic such as a vinyl plastic skin adhesively secured to the outer surface of the flexible open-cell foam sleeve, and air passages for communication between the interior of the mandrel and the open-cell foam sleeve, the resulting assembly being positioned in a mold for production of cored structural panels. In operation the tool assembly is placed under pressure and expanded to force the plastic skin of the assembly outwardly during pouring and setting of the construction material, e.g., a cement or cement-polymer composition in a mold, and after setting thereof the tool assembly is subjected to reduced pressure or a vacuum to withdraw the plastic skin from the set composition, e.g., in the form of a molded panel, to facilitate removal of the tool from the molded panel, thereby forming a cored construction material or panel. Also included as a feature, pneumatic means in the form of a bellows arrangement comprising an external flexible, e.g., rubber, corrugated member, and in the interior of such corrugated member a permeable open-cell, e.g., polyurethane, foam, and tensioning means, said bellows being inflatable for applying pressure to force a contact, e.g., honeycomb, member mounted on the bellows, against an outer surface of a casting composition in a mold, to form an outer surface for a structural molded panel, and which bellows can be deflated to facilitate removal of the pneumatic tool and associated members from the mold following setting of the panel construction. Also included, means providing a combination or arrangement of a plurality of both said mandrel and bellows assemblies for provision of a cored molded structural panel containing outer surfaces of a predetermined, e.g., smooth or textured, configuration.

Transducer device for electrically operated brakes

Abstract: An electro-mechanical pressure responsive control system and apparatus for controlling the current supplied to the actuating coils of electric brakes of a towed vehicle. The control includes a transducer having a flexible bellows with a powdered magnetic material received therein which, when compressed by foreshortening of the bellows due to operation of the brake system of a towing vehicle, decreases in electrical resistance and thereby supplies greater current to the brakes of the towed vehicle, and vice versa. A magnetic field prevents the powdered material from becoming permanently compacted by repeated cycling of the bellows.

Flexible pipe connector for machinery protection

Abstract: The illustrated connecting device is adapted to provide a flexible connection between a pipeline and a pump, compressor, engine, vessel, reactor, or another pipeline, or any other machine, device or equipment to protect the equipment against stresses and strains due to the fluid pressure in the pipeline, and also due to thermal expansion and contraction in the pipeline. The connecting device also protects the equipment against other forces and vibrations which might otherwise be transmitted to the equipment by the pipeline. The transmission of vibrations from the equipment to the pipeline is also minimized. In addition, the connecting device reduces the transmission of noise in both directions between the equipment and the pipeline. The connecting device may comprise a casing having first and second diametrically opposite portions and a third portion extending generally perpendicular to the first and second portions. A pipeline coupling section extends into the first portion of the casing and is rigidly connected thereto. A conduit is disposed within the casing and is provided with first and second diametrically opposite conduit sections and a third conduit section extending generally perpendicular to the first and second sections. A first flexible bellows is connected between the first section of the conduit and the pipeline coupling section. A second flexible bellows is connected between the second conduit section and a blind pipe section connected to the second portion of the casing. The equipment is adapted to be connected to an equipment-connecting section which is rigidly connected to the third section of the conduit. A third flexible bellows is connected between the equipment-connecting section and the third portion of the casing. The third bellows provide flexibility between the equipment-connecting section and the casing, while preventing the transmission of forces to the equipment due to the fluid pressure in the pipeline.

Cold transport line

Abstract: A flexible cold transport line comprises cold transport medium tubes made of a synthetic material which are suspended, by way of flexible wires, from an enveloping radiation shield which is in thermal contact with two cooling medium tubes situated outside the radiation shield; other flexible wires suspend these cooling medium tubes together with the radiation shield inside a flexible bellows which serves as a vacuum jacket.

The Respiratory Apparatus

Abstract: Publisher Summary This chapter describes the respiratory system of the body. The respiratory system consists of a reciprocating elastic bellows pump driven by muscles of the chest wall. These muscles pull air in, and the air is then expelled as the elastic recoil returns the system to its resting volume. In the lungs, the air is brought into contact with the blood being pumped through the lungs by a pulsatile pump, which is the right ventricle. Blood leaving the lungs is pumped to the body by another pulsatile pump, which is the left ventricle. The air exchange system is a form of the bellows pump. The outer ridged wall of this pump, the chest cage, has the respiratory muscles attached to it. The lung is closely applied to the inner surface of the chest cage. To move this bellows, a force must be applied by the muscles. The chapter illustrates the volume–pressure analog of the respiratory system and discusses the coordination of ventilation and perfusion. It also describes diffusion of gases and the concept of the artificial lung.

Tilting suction device for lifting objects with flat top surfaces

Abstract: A tilting suction device for lifting objects having a flat surface in which the bellows is peripherally pleated over its entire length; one diametrical half having an axial rigidity differing from that of the other diametrical half so that when evacuated, it will assume an angularly inclined condition to reorient the object being lifted and/or the pleated bellows is permanently inclined and is introduced to an object being lifted in an inclined condition and when evacuated assumes an inclined condition to reorient the object being lifted.

Apparatus and process for removing chips from blind holes

Abstract: An apparatus for removing chips from a blind hole has a blowpipe which is projected into the hole so that when high pressure air is discharged from the blowpipe, the chips in the hole are dislodged and propelled toward the open end of the hole. The apparatus further has a contractable bellows, the end of which bears against the workpiece in surrounding relation to the hole. The bellows leads to a container in which the chips are collected and a vacuum is induced in the container by a venturi arrangement or other suitable device so as to create an airstream which conveys the dislodged chips through the bellows and to the container.

Waveguide expansion joint

Abstract: An expansion joint for a waveguide line comprises two telescoping tubular members and a bellows connecting the two members to allow relative movement therebetween while maintaining a uniform continuous electrical surface through the joint with the capability of supporting either positive or negative pressure with respect to atmospheric pressure.

Controlled burning squib arrangement

Abstract: A controlled burning squib arrangement is presented wherein a first-stage ignition is used to heat an adjacent second-stage deflagrator such that the explosive components are substantially converted to gas in a first chamber prior to entering an expandable second chamber. Such arrangements are particularly useful in thrusters designed to drive pistons, bellows, or flexible membranes in lateral displacement mechanisms.

Fluidically-controlled air-conditioning system

Abstract: The present invention involves the use of fluidic principles in an air-conditioning system to provide both temperature and volume control. More particularly, fluidic amplifier apparatus is coupled to an inflatable bag or bellows positioned in the path of the conditioned air and, under the control of a thermovalve, the fluidic apparatus either inflates or deflates the bellows, thereby varying the flow of air to the conditioned space to meet the changing load conditions there. The volume limiter apparatus also affects the state of the bellows and, therefore, also affects the flow of air to the conditioned space.

Bellows sealed butterfly valve

Abstract: The specification and drawings disclose a valve particularly suited for use in critical vacuum systems. The valve shown comprises a body having a through flow passage of generally circular cross-section. A butterfly valve disc is positioned in the passage and has an outer periphery adapted to close the passage when rotated to a position transverse to the axis of the passage. A rotatable operating stem is connected to the valve disc and extends outwardly through the body. Joined with the operating stem is an actuating stem which has an outer end portion inclined at an angle relative to the axis of the operating stem. A bellows assembly encloses the actuating stem with a lower portion of the assembly joined to the body. The bellows assembly includes a flexible, gas impervious bellows member which encloses the actuating stem and is inclined throughout a portion of its length at an angle corresponding to the angle of the inclination of the outer end portion of the actuating stem. Additionally, the outer end of the bellows is rotatably engaged with the outer end of the actuating stem. Means are provided in the form of a rotatable housing member for applying a generally radially acting force to the outer end of the bellows assembly to produce rotation of the operating stem and deflection of the bellows without torsional loading of the bellows.

Pressure-inductance transducer

Abstract: In an electronic fuel injection system, a transducer for converting a variable pressure signal to a variable inductive signal has a coil wound on a plastic spool and surrounded by a ferrite cup and cap. A nickel plated steel sleeve snaps into the spool and supports a Teflon coated steel plunger which is tapered to provide a variable air gap with the ferrite cap. This assembly is resiliently supported in a housing and is operated through a bimetallic disc from an evacuated bellows responsive to the absolute pressure in the engine air induction passage. The bellows is positioned by a diaphragm which also is responsive to induction passage pressure to provide power enrichment. Adjustments are provided for the idle, power cut-in, and wide open throttle points and for initial calibration of the transducer.

Helicopter rotor plenum chamber

Abstract: A floating helicopter rotor hub is disclosed for transporting a flow of air from within the rotor hub to hollow sections within each of a pair of rotor blades. A hollow rotor shaft, connected to an air compressor within the helicopter, conveys a flow of air to the rotor hub. Each of a pair of flexible bellows conveys portions of the flow of air from the rotor hub to the hollow section within one of the rotor blades. Each of the rotor blades includes bearing members which permit a predetermined amount of freedom in the rotor blade pitch axis, angular movement of the blade with respect to the rotor hub, and angular movement of the rotor hub and rotor blade assembly with respect to the rotor shaft. The flexible nature of the bellows, and appropriate seals, permits the bellows to compensate for the simple or compound angular movements of the rotor blades without disrupting the air flow through the rotor hub. The flow of air through each rotor blade is discharged through a nozzle disposed at the trialing edge on the tip of each rotor blade. The reaction force exerted by the discharging flow of air rotates the rotor blades about the rotor shaft.

Pneumatic chest exerciser

Abstract: An exercise device is provided with a pair of opposed bellows members which are manually collapsible toward a central member. The central member is provided with an inlet and a plurality of different size outlet apertures, and a check valve to control air flow through the inlet aperture. Collapsing of the bellows members toward the central member causes air to be expelled through a selected one of the outlet apertures. The bellows are then released to return to their original position and the exercise is repeated, thus exercising the chest muscles underlying the user''s breasts to achieve development thereof.

Carburetor output control device

Abstract: A device for optimizing the air/fuel ratio of a combustible mixture produced in a carburetter when atmospheric pressure and temperature deviate from given levels. When a bellows extends in response to the deviation from the given levels, atomospheric air is supplied downstream of a carburetter throttle valve through a diaphragm valve assembly responsive to the extension of the bellows during idling or light-load operation of an engine, while air is supplied to a main mixture supply passage through another diaphragm valve assembly responsive to the operation of the first-mentioned assembly during full-load operation.

Animation device for a figure toy

Abstract: Tearing reservoir is pressurized by inflatable sack connected to a bellows mounted in figure toy head and receiving air from water-impervious, hollow torso in fluid communication with bellows through a neck plug connected to the bellows and the torso in such a manner that water entering head when figure toy is immersed will not pass into torso. A reed-type noise maker may be mounted in the neck plug.

Game call device

Abstract: An animal call device for use in simulating game calls, embodying a conventional airoperated sound producing assembly having an elongated extensible and contractible bellows attached in an air-tight manner to the sound producing assembly. The bellows is constructed so that when the device is held with the voice assembly upright and the bellows hanging downwardly, the bellows has a normal equilibrium position which is generally midway intermediate the fully extended and fully compressed positions and has sufficient weight distribution for actuating the sound producing assembly when the operator holds the assembly between his fingers with the bellows extending downwardly without said bellows contacting anything and rapidly moves the sound producing assembly up and down along the axis of the bellows to extend and compress the bellows thereby forcing air in alternate directions through the sound producing assembly.

Pneumatic bogie stabilizer

Abstract: The car and body are provided therebetween with a force transmitting means which imposes a coupling moment on the bogie to compensate for a moment induced by bucking and the like, for example at starting of the vehicle. The force transmitting means uses pairs of vertically disposed pneumatic spring bellows between the bogie and body with opposite bellows being interconnected in a cross-wise pattern. The force transmitting means can also be in the form of double-acting actuators which have their respective pressure chambers connected in cross-wise manner.