Abstract: A pressure sensor for detecting the pressure of a medium bounded by a wall, in particular for detecting the pressure in the pump work chamber of a fuel injection pump, with a housing that is disposed in a through bore of the central screw plug of the fuel injection pump. The housing has a separate front housing part, which is welded to a measuring element support and together with this measuring element support, a measuring element, a pressure transmission element, and a membrane that constitutes the bottom of the front housing part, constitutes a measurement head that is definitely braced in the pressure transmission direction and cannot be disassembled. The measurement head contacts the through bore and other components of the pressure sensor exclusively by way of an outer flange, which is disposed on the outer circumference of the measurement head.

Abstract: A non-intrusive method for in-situ measurement of etching chamber and optionally etch rate inside a plasma etching chamber is disclosed for use in the fabrication of semiconductor devices. The method includes the step of selecting at least one plasma species as a probe which can be F, CF.sub.2, or CO, then measuring the emission intensity at a predetermined wavelength corresponding to the plasma species so selected. Preferably, the emission intensity is measured at wavelength of 686 nm (corresponding to the transition of F from 3s.sup.3 P.sub.3 to 3p.sup.4 P.sub.3), 269 or 239 nm, corresponding to the transitions from A.sup.1 B.sub.1 (v'=0) to X.sup.1 A.sub.1 (v"=0) and from A.sup.1 B.sub.1 (v'=9) to X.sup.1 A.sub.1 (v"=0) for CF.sub.2, respectively, and 693 or 505 nm, corresponding to the transitions from d.sup.3 .PI.(v'=2) to a.sup.3 .PI.(v"=2) and from d.sup.3 .PI.(v'=7) to a.sup.3 .PI.(v"=2) for CO, respectively.

Abstract: Besides the individual modules (1', 1'"), a compressed air maintenance device consisting of individual easily interchangeable modules (1), e.g. pressure regulators, oil atomisers (1'"), condensate separators (1'), in which the individual modules (1) may have emitters (8) for the actual operating status and/or predetermined limit values, also has an indicating and monitoring module (1") having optical and/or acoustic signalling devices (10) for the operational and/or fault status determined for the individual modules (1). Said signalling devices (10) can be easily coupled to the relevant emitters (8) of the modules (1). Any necessary maintenance work or operational breakdowns are thus easily recognizable.

Abstract: A sensor for detecting environmental media and pressure comprises two types of optical fibers. An intrinsic fiber containing a portion of the fiber with the jacket removed is sensitive to its surroundings as some light traveling through the fiber will escape. The change in light intensity is received by a light detector, and this information is interpreted to correspond to a certain media, a change in media, or a phase change in media. An extrinsic fiber with a membrane and mirror located at one end is placed vertically in the media. Pressure from the media changes the position of the membrane and the mirror, resulting in a change in the intensity of the light reflected back through the fiber to the light detector. The pressure can then be used to determine the volume of the media in the container. Pressure determination can be continuous. In addition, both types of sensors can be networked, allowing information from one sensor to influence the gathering of information from the other.

Abstract: A pressure transducer, in particular for sensing a lateral collision in a motor vehicle, delivers an electric useful signal which is determined by a relative pressure change relating to a pressure event. Low-frequency changes in an output signal of a sensor device, which depend on the ambient pressure, are compensated by a control device with an integrating behavior. The sensitivity of the sensor device, as a manipulated variable, changes in a manner inversely proportional to the ambient pressure. Higher-frequency pressure changes in the output signal of the sensor device are not compensated, but as a result of the variable sensitivity of the sensor device, determine as relative pressure changes the useful signal, which is additionally independent of temperature influences and offset errors of the pressure transducer.

Abstract: A combined fluid pressure and temperature sensor device 10 has a variable capacitor (14) formed of a rigid substrate (14a) and flexible diaphragm (14b) attached thereto in sealed, spaced apart relation by an annular glass seal (34). The capacitor is received in a fluid passage chamber (12e) of a housing (12) having a fluid port (12b) for coupling to a fluid pressure source to be monitored. A connector (20) mounting transducer terminal pins is received in an open end of the housing with an electric circuit chamber (20d) formed between the connector and the variable capacitor which receives signal conditioning circuitry (26). A temperature responsive thermistor (32) is disposed, in one embodiment, on the exposed face of the diaphragm and is provided with electrical traces (32a, 32b) which go through apertures 14k, 14j) in the diaphragm into electrical contact with connection pads on the substrate within a glass enclosed window (34k, 34j).

Abstract: A dual valve apparatus enables quick measurement of pressure contained within a housing. The housing has a main body, a check valve housed in the main body and a cover whose removal renders the check valve accessible. The check valve is normally compressed against a check valve seat to provide a first seal that prevents leakage of the pressure. The dual valve apparatus includes a modified cover, a valve body and a valve stem. The modified cover defines first and second bores axially offset from and in communication with one another. The first bore is at least partially threaded. When the modified cover is secured to the main body, the second bore is aligned with the check valve. The valve body accommodates a valve bore from its protuberant end to its threaded end. The protuberant end is shaped to mate with a female portion of a quick connect coupling. The threaded end screws into the first bore of the modified cover.

Abstract: An apparatus is provided for detecting the pressure of a fluid. The device includes a device for detecting the pressure of a fluid comprising (a) a housing; (b) a first conduit disposed within the housing, having an open inlet end, and an outlet end; (c) a second conduit disposed within the housing having an inlet end and an open outlet end; and (d) a pressure detector disposed within the housing in abutment with the outlet end of the first conduit and the inlet end of the second conduit, such that the pressure detector is in direct operative contact with a fluid flowing within the first and second conduits. Typically, the pressure detector is a pressure transducer. Preferably, the pressure transducer is located within the body, such that the first conduit is disposed at an angle with respect to the pressure sensitive surface of the transducer, the angle being between about 50.degree. and about 75.degree., most preferably between about 65.degree. and about 70.degree..

Abstract: A safety cap for containers under steam pressure contains internally a diaphragm that is actuated by the pressure of steam in such a way as to break the mechanical connection between a closure member forming part of the cap and screwed onto the container, and a knob forming part of the cap and by means of which the latter can be screwed on and off. In order to increase the safety features of the cap, the latter is fitted with a manometer, incorporated in the cap and readable from the outside, which detects the pressure of steam in the container.

Abstract: A cylindrical member of a sensor mounting member is partitioned in its middle by a partitioning wall into a high pressure side and a low pressure side, with pressure sensors provided at the two surfaces of the partitioning wall. At a base portion of the sensor mounting member, a communicating hole constituting a portion of a flow passage of a piping joint connector is formed. The sensor mounting member structured as described above is fitted in a communicating hole that communicates between a high pressure passage and a low pressure passage bored at the side of the piping joint connector.

Abstract: In one embodiment of the present invention, a fuel sensor for a motor vehicle includes a pressure transducer integrated into an end cap for a fuel rail of the vehicle's engine. Further, a temperature transducer can also be included. Fuel sensors according to the present invention facilitate improvements in vehicle packaging and cost.

Abstract: An in-process method and apparatus for monitoring and correcting or replacing a low pressure sensor that gives incorrect low pressure readings because of being contaminated or defective during the formation of integrated circuit structures in a low pressure chemical vapor deposition chamber, where deposition rates are a function of gas flow, temperature, and chamber pressure.

Abstract: A temperature-time-pressure detecting device for a closed heat treatment zone consists of a sealed discoidal-shaped capsule of substantially transparent material adapted for placement within the zone in a generally vertical position. The capsule is formed of two opposed preferably symmetrical circular shell walls sealed around their common rim and defining therebetween a central core region containing a shaped mass of a fusible indicating material having a defined melting point at least as high as the temperature to be detected. The central core region is surrounded by an inner and an outer annular chamber which are concentric with the core region and with one another.

Abstract: A marine engine is provided with an drive unit which incorporates a water impeller to supply water to the marine engine in order to maintain proper engine cooling. An impeller tester of the present invention is connected to the drive unit to measure the pressure of the input and output of the impeller. This allows an operator to determine if the impeller will produce sufficient pressure for cooling the engine.

Abstract: A fiber optic spark plug integrated combustion pressure detector comprises the sensitive sensor head with "snap" action diaphragm to provide the temperature insensitivity to combustion temperature variations. The optical module is integrated into the electrical connector to eliminate open optical interfaces. The "snap" action and special diaphragm shape selectively increase detector knock and misfire discrimination. The pressure sensor can be made spark plug integrated or injected in block cylinder for combustion pressure sensing in engine.

Abstract: The first glass substrate having the first pressure admitting entrance for leading the pressure of fluid to be measured, is arranged at a side of a diaphragm of a pressure sensor, for measuring differential pressure. The second glass substrate is arranged at the side opposite to the first glass substrate, a spacer being sandwiched therebetween. The second pressure admitting entrance is formed at the second glass substrate, at the position opposite to the first presser admitting entrance of the first glass substrate. The first conductive film and the second conductive film are formed on two surfaces facing to each other, of the first and second glass substrates, respectively. By measuring the specific conductance and the dielectric constant of the object fluid between the two conductive films, these physical constants indicating the quality of the fluid, the quality of the fluid can be also detected.

Abstract: A depth measuring device suitable for use in a dive watch is provided.

Abstract: A pneumatic tire monitoring system is disclosed which provides a pressure sensor/transponder unit for each pneumatic tire of a vehicle to monitor tire pressure. A coded signal transmitted from each transponder unit is received by a multi-purpose receiver which may provide information to the vehicle operator or to other vehicle systems and subsystems. Each transponder unit is characterized by ultra low power consumption to extend the useful battery life. The transponder units may be mounted within the vehicle tires, or externally mounted. Impedance matching circuitry allows the use of the wheel rims with the transmitting antenna so as to avoid doppler shift induced by the rotating antenna and frequency drift induced by capacitive coupling.

Abstract: A spark plug with an insulating body held in a casing and containing an inner electrode is provided with a force-measuring element for measuring the pressure acting on the spark plug, the insulating body resting against the casing via the force-measuring element when pressure is applied in an axial direction. To prevent the entrance of noise signals an axially-elastic sealing element is provided on a side adjacent to the combustion space, the sealing element additionally lending radial support to the insulating body resting against the casing of the spark plug.

Abstract: A nonintrusive diesel engine cylinder pressure transducer includes a congruously shaped fuel injector stud which has been internally instrumented with full-bridge electrical resistance strain gage circuitry. The instrumented fuel injector stud has a hole which has been bored axially lengthwise and a full Wheatstone bridge strain gage unit which has been situated in the hole. While the engine is running, the operative instrumented fuel injector stud, which has been replaced in its normal position in the fuel-injector/cylinder assembly, acts in combination with other assembly components as a cylinder pressure transducer. Measurements of tension and compression of the stud are provided which are reflective of pressure, mainly due to compression and combustion, in the engine cylinder. The full-bridge configuration eliminates bending effects and affords electrical temperature compensation. Practice of this invention advantageously avails existing structure.

Abstract: A pressure sensor for pressure detection in a combustion chamber of internal combustion engines of motor vehicles has a housing provided with an opening, a measuring element, a plunger arranged in the opening of the housing and having one end acting on the measuring element so that a measuring signal is produced proportionally to a pressure to be determined, the plunger directly abutting against the measuring element and having a material with a yielding point which is smaller than a breaking limit of a material of the measuring element, the end of the plunger which acts on the measuring element is spherical and abuts against the measuring element with such a contact surface that occurring stresses do not exceed a predetermined nominal value.

Abstract: A semiconductor acceleration detecting apparatus having a cylinder fixed to a automobile, a piston having a predetermined mass, the piston being inserted in the cylinder and being slidable in an axial direction of the cylinder, a semiconductor pressure sensor disposed so as to face towards a closed space formed by an inner wall of the cylinder and an end wall of the piston, wherein the semiconductor pressure sensor converts pressure in the closed space to an electric potential difference, and an acceleration detecting apparatus including an amplifier and a comparator for detecting acceleration of the automobile in accordance with the electric potential difference outputted from the semiconductor pressure sensor.

Abstract: A marine engine is provided with an drive unit which incorporates a water impeller to supply water to the marine engine in order to maintain proper engine cooling. Devices are currently available that allow the watercraft's engine to be started when the craft is not in actual service. These devices attach to the craft's drive unit and they provide for water, from a household faucet, to be supplied to the water impeller. An impeller tester of the present invention is connected to such devices to measure the pressure of the input and output of the impeller. This allows an operator to determine if the impeller will produce sufficient pressure for cooling the engine.

Abstract: A shoe including a shoe body having an outsold and an upper fastened to the outsole; an insole formed as an air bag filled with air and mounted within the outsole; a pressure inductor connected to the insole to detect the pressure applied to the insole; a circuit board mounted in the insole and consisting of a pressure converter and a microprocessor, the pressure converter converting the pressure detected by the pressure inductor into a frequency signal to be processed by the microprocessor so that the microprocessor obtains a value corresponding to the pressure applied to the insole; and a liquid crystal display connected to the microprocessor to display the value obtained by the microprocessor.

Abstract: In order to create a safety device (1) by means of which reliable protection of the pump can be achieved as simply as possible, it is proposed that safety device (1) have a housing (4) provided with an inlet (5) and an outlet, inside which housing a first detection device with a transmitter element in the form of an impeller (7) provided with measuring blades (9) and a central part (10) are provided to determine the liquid throughput and a second detection device (24) in the form of a probe for detecting the liquid, both of which are connected with a control device for the pump.

Abstract: A pressure sensor into which the internal pressure of a fuel tank is introduced through a nipple portion and the atmospheric pressure is introduced through an atmosphere introducing hole, and a pressure difference between the internal pressure and the atmospheric pressure is detected by a diaphragm, comprises a check valve provided in the nipple portion to prevent fuel from leaking out to the atmospheric side. A pressure buffer chamber in the nipple portion of the pressure sensor is provided in which a ball is installed. A bottom face of the pressure buffer chamber is formed to be concave, and a receiving seat for receiving the ball is provided on the bottom face. Therefore, no fuel leaks outside, even when the vehicle comes across an accident and overturns sideways under the condition that the diaphragm used as a sensor element is fractured in the measurement of internal pressure of the fuel tank.

Abstract: A valve and sensor arrangement includes a valve which has a valve member. A sensor such as a sensor for detecting a flow of water through the valve is provided within the valve member and is preferably perpendicular to a turning axis of the valve member. The sensor is preferably a flow sensor which is rotated by flow through the valve and the sensor arrangement may be provided in a valve of general utility.

Abstract: A multi-poise furnace that is capable of operating in either a vertical or horizontal orientation and having a primary heat exchanger coupled to a condensing heat exchanger, apparatus for collecting and draining condensate leaving the condensing heat exchanger.

Abstract: A portable gas purge and fill system. The inventive system (10) includes a portable housing having gas inlet and outlet couplings. An electronic pressure gauge (30) is disposed within the housing (11) for measuring the pressure of the fluid at the outlet (24) thereof. A self-check mechanism (32) is disposed within the housing (11) for verifying calibration and operation of the electronic pressure gauge (30). In a specific implementation, the invention further includes a pressure regulator (20) disposed within the housing and connected between the inlet (12) and outlets (24) thereof. A second gauge (14) is included for measuring the pressure of the fluid contained in the source. First, second and third two-way valves (18, 22, and 28) are included. The first two-way valve (18) is mounted between the second gauge (14) and the pressure regulator (20). The second two-way valve (22) is located between the pressure regulator (20) and the outlet (24).

Abstract: A pressure transducer for measuring the pressure of a fluid, in particular for invasive blood pressure measurements, comprises a housing with two chambers that are separated from one another in a fluid-proof fashion, whereby the first chamber accommodates a pressure transducer that is fastened onto a substrate and may be charged with the pressure of the fluid to be measured. The substrate lies in both chambers and has contact surfaces for the direct connection of an electric plug-in connector within the region of the second chamber. This plug-in connector comprises parallel tongues between which the substrate and a housing cover may be accommodated. One of the tongues carries electric spring contacts.

Abstract: An apparatus for testing the strength and performance of various building structures, such as doors, windows, storm shutters and panels, under hurricane type conditions, the apparatus including a vertically supported wall and a movable test structure mounting and support assembly including a frame for supporting a building structure to be tested. The frame is movably attachable in sealed engagement to a front face of the wall, such that the test structure is disposed in close, spaced relation to the wall, creating an air tight cavity between the building structure and the front face, wherein airflow is selectively delivered to or removed from the cavity by a diverter valve along an airflow conduit connecting between an air passage hole in the wall and to a high volume, low pressure blower. A computer controls the diverter valve and monitors pressure in the cavity to selectively control and rapidly change the cavity pressure through a range of predetermined positive and negative pressure levels.

Abstract: A marine engine is provided with an outdrive unit which incorporates a water impeller to supply water to the marine engine in order to maintain proper engine cooling.Devices are currently available that allow the watercraft's engine to be started when the craft is not in actual service. These devices attach to the crafts outdrive unit and they provide for water, from a household faucet, to be supplied to the water impeller. These devices have no form of measurement to communicate to the operator that a sufficient amount of water is initially being supplied to the water impeller to prevent damage to that component nor do they communicate if the water impeller is capable of producing sufficient suction to feed the crafts engine with sufficient coolant so that the engine will not over-heat when the craft is placed in its operating environment. Wherein, the invention consists of an impeller tester which is placed in existing outdrive water supply devices, or is permanently installed in the water craft.

Abstract: A marine engine is provided with an outdrive unit which incorporates a water impeller to supply water to the marine engine in order to maintain proper engine cooling. Devices are currently available that allow the watercrafts engine to be started when the craft is not in actual service. These devices attach to the crafts outdrive unit and they provide for water, from a household faucet, to be supplied to the water impeller. These devices have no form of measurement to communicate to the operator that a sufficient amount of water is initially being supplied to the water impeller to prevent damage to that component nor do they communicate if the water impeller is capable of producing sufficient suction to feed the crafts engine with sufficient coolant so that the engine will not over-heat when the craft is placed in its operating environment. Wherein, the invention consists of an impeller tester which is placed in existing outdrive water supply devices, or is permanently installed in the water craft.

Abstract: A vacuum priming diagnostic cartridge that can be inserted in place of an ordinary ink jet cartridge to diagnose and indicate vacuum condition in an ink jet maintenance station of a printer. The diagnostic cartridge includes a manifold that communicates vacuum from the maintenance station to a vacuum detector. The detector is responsive to the amount of vacuum generated by the maintenance station during a priming operation. A detector signal from the detector is directed to an interpolating driver circuit that acts on the detector signal and provides an indication of the vacuum level sensed by outputting an output signal to activate one or more indicators.

Abstract: A pressure sensor comprising a passage for introducing a pressurized medium; a member surrounding the passage; first and second sealants disposed between the member and the passage for preventing the pressurized medium from leaking to the outside through a clearance between the member and the passage; and a pressure sensing element communicating with the passage; the first sealant being made of a first material which is difficult to be deformed by the pressurized medium; the second sealant being made of a second material having a sealing effect against temperature change; the first and second sealants being arranged in series between the passage and the member surrounding the passage.

Abstract: This invention relates to a pressure measurement apparatus for inspecting therapentic energy waves, e.g. shock waves or ultrasonic waves. The pressure measurement apparatus for inspecting focal position and pressure of therapeutic energy waves comprises a pressure sensing sheet which changes visually or electrically according to the pressure, and a marker for setting the focal position, mounted on the pressure sensing sheet. Also, the apparatus for inspecting focal position and pressure of therapeutic energy waves in a water tank, comprises, a pressure sensing sheet which changes visually or electrically according to the pressure, a mount for holding the pressure sensing sheet as a flat shape, a mount holder for holding the mount, a marker for setting the focal position, held above the pressure sensing sheet from the mount holder, and holder means for holding the mount holder into the water tank.

Abstract: The signal from a vibrationally-sensitive pressure sensor is both low-pass filtered and band-pass filtered. The low-pass-filtered portion is employed as a pressure-measuring signal, while the band-pass filtered portion is used as an acceleration-measuring signal. The pressure sensor is preferably installed in the tank-venting installation of a motor vehicle to measure the pressure differential relative to the surroundings. The acceleration-measuring signal is used to stop a recognition of engine misfiring, as soon as a rough road surface is recognized as a result of this signal.

Abstract: The disclosure sets forth a diver's gauge boot having a first portion for receipt of a depth gauge and second portion for receiving a tank pressure gauge therein, with a sleeve for connecting the tank pressure gauge into a high pressure hose adapted for connection to a tank for indicating pressure in the tank, and a rotational connector between the first portion and the second portion with a pocket in the second portion for receiving a second instrument on a side of said second portion disposed away from said tank pressure gauge.

Abstract: A pressure test gauge is described, more particularly for testing the air pressure at the outlet of a spray gun. The pressure test gauge comprises a body having an inlet which may take the form of a replaceable screw-in-unit sealed airtight with the body. The unit encircles the inlet and connects with passages passing through body. The passage is a small bore tube which connects the inlet with a pressure gauge which has a display. Intermediate the inlet unit and gauge is a valve comprising a barrel with an outer screw-thread screwed into the body. Extending axially of the valve is a metering hole. The gauge body may have ribs for facilitate gripping the body and a bracket with screws to secure it to a wall.

Abstract: An apparatus for accurately measuring pressure within a rechargeable cell, the apparatus comprising: a frame, the frame including at least one cavity adapted to releasably seat a rechargeable cell; a fixed brace defining a first end of the at least one cavity; a movable brace defining the end of the at least one cavity opposite from the fixed brace, the movable brace including a hollow needle, the hollow needle having a pointed end which is operatively directed toward one end of a rechargeable cell disposed in the cavity, and means for sealing a point where the hollow needle is inserted into a rechargeable cell; a pressure transducer operatively connected with the hollow needle; and means for controllably moving the movable brace relative to the fixed brace, whereby the hollow needle is adapted for insertion into and removal from a rechargeable cell disposed in the cavity.

Abstract: A device for detecting a change in internal pressure of a cylinder includes a cylinder head, an ignition plug threadingly fitted into a plug insertion hole of the cylinder head. An annular piezoelectric sensor is secured in the plug insertion hole by screwing the plug into the insertion hole. The sensor has such an outer periphery that, when the ignition plug is screwed into the plug hole, a part of the outer periphery of the sensor placed is brought into engagement with an inside periphery of the plug hole and is thereby prevented from being further rotated in the screwing direction. By using a gasket having the same relative shape to the periphery of the plug insertion hole as that of the above sensor, rotation of the sensor can be prevented even when the sensor does not have such a relative shape.

Abstract: A method and apparatus for preventing splashing condensate from activating the safety pressure switch in a multi-poise condensing furnace includes removing the existing tubing connected to upper and lower pressure taps provided on the collector box of the furnace. T connectors and secondary tubing are then fastened to each of the pressure taps and the existing tubing reconnected to a corresponding T connector.

Abstract: A purge gas pressure monitoring system has a piezometer tube running from a pressure measuring instrument into a medium to be monitored. A temperature detector device extends the length of the piezometer tube. Outputs from the pressure measuring instrument and the temperature detector device are coupled to a central processing device or microcomputer for monitoring the outputs and using the outputs along with stored data to calculate a corrected pressure signal which is corrected for errors including errors arising as a result of variations of the average temperature along the piezometer line from a reference value.

Abstract: A retaining ring is provided for temporarily holding a pressure sensor in place within a spark plug attaching hole prior to installation of a spark plug. The retaining ring is resiliently deformed into a stressed positioned to attach itself to a circumferential wall of the spark plug attaching hole. In one embodiment, a gasket is adapted to serve also as such a retaining ring.

Abstract: A sensing and displaying system is provided including a sensor unit having a transducer disposed in intimate contact with a vessel. The transducer senses a characteristic within the vessel like pressure and outputs an electrical signal representative thereof. The sensor unit further includes a response signal generator which transmits a signal representative of the characteristic. A receiver unit receives the transmitted signal and converts it to visual indicia of the characteristic, for example, a number on a liquid crystal display. The system is capable of two-way communication between the sensor unit and the receiver unit. Both the sensor unit and receiver unit store transmitted data in internal memory.

Abstract: This invention provides a method for measuring intracranial pressure and a device for the same which enable intracranial pressure to be accurately measured without any conventional calibration using data obtained by previous measurement because they are characterized in that intracranial pressure is measured after a communication valve capable of communicating with the atmosphere is closed following zero point correction of a pressure transducer performed by adjusting the internal pressure of a flexible membrane provided at the tip of a pressing part and filled with a fluid to atmospheric pressure by the operation of the above communication valve.

Abstract: A champagne pressure gauge provides a small tube attached to the inside surface of a bidule inserted into a champagne bottle, such that as the pressure from fermentation increases, liquid is forced up the tube. The liquid level in the tube can be observed through the neck of the bottle, giving a non-intrusive, non-destructive measurement of pressure in the bottle.

Abstract: This disclosure sets forth a fluid flow line which extends at one end from a fluid source at a pressure to be measured comprised of fluids contained within a well borehole, and the fluid flow line has a "J" shaped component to trap debris and trash to prevent it from flowing the full length of the fluid flow line and contacting a pressure transducer. The flow line is further defined by the threaded connection of two structural components making up the sonde wherein the components thread together and threads are sufficiently spaced apart to form an elongate helix as part of the flow path.

Abstract: A footwear of the present invention is provided with tank chambers which are disposed to be in contact with an instep, sole and ankle of the user for applying pressure thereto to protect his foot from shocks. The tank chambers are filled with air and air pressure within the tank chambers can be adjusted. The footwear is further provided with a pressure sensor for measuring air pressure within the tank chambers to generate a pressure signal, and a pressure data displaying device for indicating pressure data on the basis of the pressure signal generated by the pressure sensor. Therefore, the user can make sure on the pressure data display device a pressure level at which the most suitable pressure for his foot is obtained. The user is also allowed to extremely easily adjust the air pressure at the above pressure level, watching an indication on the pressure data display device.

Abstract: Integrated design of a combustion pressure sensor (11, 12, 13, 14) and combustion heat-flow sensor (21) which is suitable for determining a physical variable of the combustion process of an engine.