Abstract: A thermal modulating control valve for providing bleed air for aircraft anti-icing purposes includes a valve chamber with an inlet for high temperature bleed air and an outlet for temperature modulated bleed air for aircraft systems. A modular valve mechanism is mounted in a chamber for regulating the flow of hot bleed air to the outlet in response to the temperature of the supply. The valve includes a first wall section having a plurality of spaced apart flow orifices or openings in one face and fixedly secured adjacent the inlet end of the chamber, and a second confronting wall section having a plurality of spaced apart flow orifices or openings provided to directly confront the orifices in the first wall section. The wall sections are movable relative to one another in response to the temperature of the bleed air at the inlet end so as to displace the respective sets of flow orifices in and out of registry for controlling the flow of bleed air supplied to the outlet of the valve.

Abstract: A fiber optic displacement transducer is provided by a fiber optic reflective probe (2), and an axially moveable target (4) having a dichroic optical filter (16) with first and second reflection surfaces (20 and 24) axially spaced by a fixed distance t and reflecting different wavelength light.

Abstract: High-pressure, micrometering valves requiring low-actuating torque are combined in a lightweight, portable pressure calibration console, housed in a common valve block. A manual pressure valve and a manual vent valve connect compressed gas from an internal storage cylinder to pressure measuring gages or transducers to be calibrated. Automatically actuated isolation valves connect and disconnect a vernier balancing cylinder assembly, permitting fine manual adjustment of calibration pressures as high as 10,000 psi. Positive shutoff combined with low-torque, fingertip control and non-jamming closure are provided by the frictionally-engaged valve components.

Abstract: An integral fluid filter and capillary restrictor unit, or alternatively an integral fluid filter and multiple orifice restrictor unit, is resiliently positioned in a manifold body which is edge mounted to a flat cylindrical assembly which contains the medication reservoir and pressure stabilizing chamber to provide a completely self contained implantable unit which is thin, small and light weight and yet needs to be refilled only as often as the much larger stainless steel capillary tube devices with bellows type reservoirs now on the market.

Abstract: An implantable medication infusion device wherein a generally cylindrical manifold is employed having a shallow recess on one face thereof. A flexible diaphragm is positioned to form with the face of said manifold a medication reservoir. A circular cover member is positioned over the diaphragm to form with said diaphragm a pressure stabilizing chamber within which is positioned a two-phase fluid for maintaining a constant pressure on said diaphragm. A permanent magnet is positioned at the center of said diaphragm and is movable therewith. A Hall effect transducer positioned on said manifold opposite said permanent magnet is employed continuously to measure the position of said diaphragm and provide an indication of the amount of medication in said reservoir.A method of filling and sealing the pressure stabilizing chamber which insures that a small bubble of two-phase fluid is present in said chamber at all times.

Abstract: A bidirectional relief valve is provided which has a slidable valve element provided with first and second groups of ports which are positioned on opposite sides of a fixed port in the valve body when the slidable valve element is in a neutral position. The valve element may be moved in either direction from the neutral position in response to the differential pressure across the damping head under selected conditions of preload which may be different in each direction. The movable valve element includes a stem portion of relatively small diameter and a larger diameter head portion in which the first and second ports are located. In order to prevent an excessive pressure build up, or overshoot, in response to a shock wave of large magnitude in either direction, the movable valve element is given an initial acceleration by employing the relatively large area of the valve head.

Abstract: A damping assembly for fluid filled sock absorber having a cylinder and a rod slidable therein for movement in opposite directions from a static position includes a damping head mounted on the rod and having a plurality of bi-directional flow control or relief valves in communication with fluid chambers on opposite sides of the damping head which permit fluid flow between the chambers under selectively controlled predetermined parameters. Each bi-directional relief valve includes a unitary valve element having first and second ports which are positioned on opposite sides of a fixed port on the damping head when the valve element is in a neutral position. The valve element may be moved in either direction from the neutral position in response to the differential pressure across the damping head under selected conditions of preload which may be different in each direction. Also, the flow characteristics in either direction may be independently selected by appropriately shaping the first and second ports.

Abstract: The implantable device includes a medication reservoir, a pulsatile pump and an absolute pressure transducer. The pumping pressure wave developed in the pumping chamber is measured by the absolute pressure transducer whose output is used to adjust the pulsing rate of the solenoid operated pump so that the programmed time averaged rate of infusion of medication into the body is precisely maintained throughout all operating temperature and pressure conditions.

Abstract: A stem nut for driving a valve stem is coaxially rotatable within a drive collar which is offset from the axis of a nutating drive motor. The drive motor and the drive shaft are coupled together for rotation by means of readily interchangeable sprockets driven by a roller chain. The coaxial stem nut and the drive collar are releasably locked together by removable pins. When the pins are removed, the stem nut permits the valve stem to be directly operated with a wrench or the like. The stem nut is readily removable from the offset drive assembly by releasing a snap ring.

Abstract: The implantable device includes a medication reservoir, a pulsatile pump and an absolute pressure transducer. The pumping pressure wave developed in the pumping chamber is measured by the absolute pressure transducer whose output is used to adjust the pulsing rate of the solenoid operated pump so that the programmed time averaged rate of infusion of medication into the body is precisely maintained throughout all operating temperature and pressure conditions.

Abstract: An integral valve and pumping unit is provided for infusing medication into the body which employs only one moving part. This pumping unit is connected to the medication supply reservoir through a first flow restriction device which has no moving parts but has directional flow characteristics so that liquid medication can flow readily from the reservoir to the pumping unit but flow from the pumping unit to the reservoir encounters a relatively high resistance. A second flow restriction device is connected between the pumping unit and the outlet catheter which is employed to infuse medication into the body, this second flow restriction device likewise having no moving parts and offering relatively little resistance to liquid flow from the pumping unit to the catheter while having relatively high resistance to flow in the opposite direction.

Abstract: A poppet valve actuating apparatus includes an actuator for driving a valve poppet closed with substantial but momentary force to effect tight valve shutoff. After driving the poppet closed with a momentarily-applied relatively high-value force, the actuator then automatically reduces the poppet seating or holding force for maintaining the value in the closed position by automatic release of an integral detent coupling that applies a lower-value auxiliary spring holding force after the poppet is seated. The reduced value holding force prevents cold flow of the poppet material during extended periods wherein the poppet is in a closed position.

Abstract: A new and improved gate valve suitable for use with high pressure, high temperature corrosive fluids such as those developed in coal gasification processes, uranium enrichment and the like comprises a valve body having a flow passage with a pair of opposed annular valve seats and a gate assembly mounted for movement transversely of the flow passage between a valve seat confronting position and an open position displaced transversely outwardly of the passage. The gate assembly includes a pair of flat spring flexure elements which support a pair of valve discs for movement toward and away from the valve seats when the assembly is in the valve seat confronting position. These flexure elements normally bias the valve discs out of engagement with the valve seats. The discs are interconnected by an upwardly bowed flexure element which is retained between upper and lower holding members connected to the transversely extending stem of the gate valve.

Abstract: An armature of magnetizable material is mounted within a magnetic housing by means of a pair of Belleville springs so that the armature is movable along the central axis thereof between opposed pole pieces formed in the housing. A radially magnetized permanent magnet is positioned in the housing concentric with the armature and a single actuator coil is positioned in the housing concentric with one of the pole pieces. The armature is held in engagement with one of the pole pieces by the flux of the permanent magnet. When the coil is energized the armature is moved into engagement with the opposite pole piece against the biasing force of the Belleville springs, in which position one valve element is closed and the other valve element is opened. The armature pole faces and the pole pieces within the housing have a configuration such that when the armature is in the coil energized position the magnetic permeance of the armature with respect to each pole piece is substantially equal.

Abstract: A new and improved gate valve suitable for use with high pressure, high temperature fluids such as those developed in coal gasification processes and the like which comprises a valve gate assembly including opposed outwardly facing valve discs is bodily movable from a valve open position to a valve seat confronting position in which the valve discs are aligned with but spaced from opposed valve seats in the flow passage. Upon further downward movement of the valve stem the valve discs are moved laterally outwardly into engagement with the valve seats. In order to accommodate situations where the opposed valve seats are spaced relatively close together, the valve discs are mounted on annular spring washers which normally bias said valve discs away from said valve seats. A pair of toggle elements are actuated by downward movement of the valve stem to force the valve discs laterally outwardly into engagement with the valve seats after the assembly has been moved to the valve seat confronting position.

Abstract: A high energy loss fluid flow control device suitable for use with high temperature, abrasive coal liquids, gases and the like comprises an elongated body having an axially extending bore with longitudinally spaced apart inlet and outlet passages in communication with the bore. An elongated valve member is mounted for sliding axial movement within the bore between open and closed positions. The valve member includes an outer surface spiralling about a longitudinal axis from a maximum diameter portion adjacent one passage toward a minimum diameter portion adjacent the other passage. The bore of the elongated body includes a surface in close facing relation with the spiralling surface of the valve member and this surface also is spiralled about a longitudinal axis from a minimum diameter portion towards a maximum diameter portion.

Abstract: A valve for use with high temperature abrasive fluids includes a valve body having an outer shell of metal, such as low carbon steel, a refractory liner attached to the shell comprising an insulating outer layer of relatively low density castable refractory material, such as alumina, an inner layer of relatively high density castable refractory abrasion resistant material attached to an inner surface of the insulating layer, and a flame sprayed ceramic coating applied to an inner surface of the abrasion resistant castable refractory layer defining a flow passage in the valve body for the passage of fluids. The valve body includes a removable core assembly containing the working parts of the valve.

Abstract: A high energy loss fluid flow control device comprises a housing having an annular wall with an inlet adjacent one end and an outlet adjacent the other end. The housing wall includes an inside surface formed with a continuous helical land and groove defining at least a part of a helical flow passage between the inlet and outlet. A valve member is mounted in the housing for movement toward and away from the inlet and has an outer surface formed with a continuous helical land and groove also defining at least a part of the helical flow passage extending between opposite ends of the member. The land of the valve member projects into the groove of the housing and the land of the housing wall projects into the groove of the valve member forming the continuous helical flow passage extending between the inlet and outlet and means is provided for supporting the valve member in the housing for relative rotation to move toward and away from the inlet to lengthen or shorten the continuous flow passage as desired.

Abstract: A high energy loss fluid flow control device comprising a body defining a chamber in communication with a fluid inlet passage and fluid outlet passage at one end of the chamber; a hollow tubular member mounted in said chamber open at one end adjacent said outlet passage and formed with a helical, internally projecting land extended between said outlet passage and an inlet opening in the wall of said member in communication with said inlet passage, a valve member mounted in said tubular member for axial translation relative thereto including an outwardly projecting helical land extending between an end of said valve member and spaced between adjacent turns of said helical land of said tubular member thereby defining a helical fluid flow passage between said lands extending between said inlet opening and said outlet end of said tubular member.

Abstract: A force measuring beam assembly for use in pressure transducers, accelerometers, load cells, or the like, is symmetrically and floatingly mounted by means of a pair of thin torsionally flexed elements which are positioned in planes perpendicular to the plane of the beam and connect diametrically opposed corners of the beam to a rigid supporting base member in such manner that the beam may be deflected in proportion to movement of the center of the beam and provide an extremely accurate and linear output signal by means of strain gauge elements secured to the beam.In one embodiment a transducer for measuring fluid pressure over a wide range of values includes a diaphragm which is concentric with the force measuring beam assembly. A rigid connection is provided between the center of the diaphragm and the center of the beam so that non-linearity effects are avoided.