Abstract: A direct passage manometer includes a body into which at least two rectilinear channels open into a recessed curved surface at a central portion thereof. A diaphragm seals the curved surface at the center of the body and is fixed in place by a load cell. The load cell has a movement amplifying device and indicator mounted thereon. The movement amplifying device rests on the diaphragm, connects to the indicator and is fixed in place by the load cell. The opening holes of the two channels are elliptical in profile and machined so as to avoid any retention zones.

Abstract: A mechanical gauge having a mechanism for setting multiple alarms within tolerance values. When such tolerance values defined by the mechanism are reached, the same mechanism activates an alarm.

Abstract: An apparatus for measuring a physical quantity or parameter includes a housing having a supportably mounted shaft member. A first end of the shaft member is placed in proximity with the output of a displacement device which is responsive to a change in the physical quantity. A ribbon spring member is coaxially disposed and wound helically about the supported shaft member, one end of the spring member being attached to the shaft and a remaining end to a supporting structure. Based on a change in the physical quantity, (pressure, velocity, temperature, etc.), the output of the displacement device engages the shaft member, which axially displaces and rotates due to the constraint of the ribbon spring member. The rotation of the shaft member produces a corresponding angular deflection of an attached pointer relative to readable indicia.

Abstract: The pressure gauge spring is a responsive and easy to manufacture gauge for connection to a pressure source. The spring assembly comprises a coiled hollow tube having a first end and a second end with a body portion therebetween, the hollow tube adapted to produce a displacement of the second end in response to a change in said pressure source to which said first end is connected. The second end of the body portion is sealed. The body portion of the spring assembly has a first longitudinal portion and a second longitudinal portion extending from proximate to said first longitudinal portion to said second end and substantially uniformly compressed along the second longitudinal portion to reduce volume thereby. A transition area is disposed between said first end and said first longitudinal portion of said hollow tube, and is compressed so as to form a continuous longitudinally extending ridge along said transition area.

Abstract: A component for a gauge comprising a bourdon tube having a first end and a second end. A socket is joined to the first end of the bourdon tube and a closure member is joined to the second end of the bourdon tube. At least one of the bourdon tube and the closure member comprises a copper nickel alloy and/or the socket comprises a nickel silver alloy. In addition, a low temperature soldering material, such as a tin-bismuth soldering material, was used to affix the socket to the bourdon tube and the closure member to the bourdon tube. Preferably, the components contain substantially no free copper. Such a component resists corrosion, especially corrosion formed when certain fluids are used with such components.

Abstract: A watch, in particular a dive watch, having a movement (16) which is arranged in a watch case (12) and can be used to drive an hour hand (3) via an hour tube and a minute hand (4) via a minute tube in a fashion sweeping over a dial (1). Also present is a pressure detecting device for detecting the ambient pressure outside the watch case (12) and a display for representing the detected pressure values. There is arranged in the watch case (12) a mechanical pressure transducer to which the ambient pressure outside the watch case (12) can be applied and by means of which a mechanical depth measurement mechanism (17) of a mechanical display can be driven.

Abstract: The pressure measurement device has a housing (2) with a back wall (8) and a side wall (10), a measurement system arranged inside the housing as well as a connection arrangement (6) with a device connector (64) arranged outside on the housing. The measurement system has a pointer mechanism (14) with an upper plate (20) and a pointer shaft (30) as well as a curved, metal Bourdon tube (12) and a spring support (16) supporting the Bourdon tube. The connection arrangement (6) and the spring support (16) are connected inside the housing by means of a plug connection which is formed by a first plug-in component (52) designed on the spring support and a second plug-in component designed on the connection arrangement (6). The measurement system is distinguished by the fact that its spring support (16) has the plug-in component (52) and that the plug-in component is arranged radially near the pointer shaft (30).

Abstract: The measuring instrument for a pressure gauge comprises an indicator unit with two plates that bear rotatably an indicator shaft carrying a pinion and that furthermore bear a gear segment. The measuring instrument furthermore comprises a metal Bourdon tube bent into an arc shape, which is soldered on one end to a spring carrier and on the other to a spring end-piece. The spring end-piece is connected to the gear segment such that the displacement of the spring end-piece because of the measurement pressure is transferred to the gear segment. The spring end-piece constitutes a part that is rigidly attached to one of the two plates prior to the Bourdon tube being soldered to the spring end-piece and that is separated from this plate once the Bourdon tube has been soldered to the spring end-piece. During the course of the manufacture of this measuring instrument, the spring end-piece is produced as a part that is securely joined to the two plates.

Abstract: A pressure gauge in which the displacement tip of the Bourdon tube is sealed and secured to a bracket of an amplifier movement by a selected solder composition affording a failure response to an encountered overpressure at a pressure value lower than the burst pressure of the Bourdon tube. Overpressure causes a fracture in the solder to be incurred enabling release of the overpressure while a throttle plug situated in the inlet path to the Bourdon tube severely restricts continuing gas flow to the fracture site. As a consequence, released flow from the solder fracture will be at a pressure insufficient to potentially cause explosion of the gauge case/lens to occur.

Abstract: Moving magnet indicating instruments in which a damping fluid migration barrier projects from the inside of one wall of the bobbin coil and another damping fluid migration barrier projects from the face of the rotor which confronts that wall. Certain fluids have a tendency to migrate, or “creep,” over surfaces they contact. The fluid migration barriers of the present invention prevent unwanted migration of fluid out of a cavity by providing a sharp peak over which the fluid cannot creep.

Abstract: There is disclosed a pressure gauge construction in which the dial plate includes recessed indentations interfit with pins projecting beyond the front face of the gauge movement for supporting a dial plate in place. An adhesive cement is contained between the back face of the dial plate and the front face of the movement effects an adhesive bonding therebetween.

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 gauge for the measurement of both pressure and temperature of a fluid includes a dial plate having pressure and temperature graduations thereon, a first Bourdon tube for measuring pressure and a second Bourdon tube for measuring temperature. The Bourdon tubes are of conventional multiturn spiral construction, each having an open end which communicates with a source of pressure and a closed free end that rotationally responds to changes in pressure within the Bourdon tube. The open ends of the Bourdon tubes are mounted in fixed relation to the dial plate. Attached to the free end of each Bourdon tube is a direct coupled indicating pointer which is rotationally displaceable relative to corresponding graduations on the dial plate. A temperature responsive bulb is connected via a capillary tube to the open end of the second spiral Bourdon tube and forms a closed temperature sensing system therewith.

Abstract: Methods of using styrene oil, its fractions, and combinations thereof as working fluids, lubricants, fuels and solvents.

Abstract: A pressure instrument for connection to a process line including a gland having an interior passageway, a body connected to the gland and having a fluid line extending therethrough in fluid communication with the interior passageway of the gland, a pressure-responsive instrument connected to said fluid line, and a filter disposed in the interior passageway of the gland so as to prevent particles from passing from the instrument to the process line. The body has a pilot formed at one end of the body so as to be received within an end of the gland. The body is welded to the gland rearwardly of the pilot. The filter is positioned within the interior passageway of the gland forward of the pilot of the body. The pressure-responsive instrument is a bourdon tube having an interior in fluid communication with the fluid line.

Abstract: A residual pressure sensor for verifying that a residual pressure is zero, and to a monitoring apparatus for monitoring for faults in the residual pressure sensor. In order to detect that a residual pressure has completely gone, the residual pressure sensor detects change conditions in the output therefrom, and an output for no residual pressure is not generated while there are changes. Moreover, an electrical power supply condition to a drive solenoid (21) of a solenoid valve for opening/closing a pressure supply line, is monitored using a fail-safe current sensor (21) which outputs a logic value "0" when the presence of a current is detected, and which outputs a logic value "1" when the presence of a current is not detected. Fault monitoring of the residual pressure sensor is then carried out based on the monitoring output conditions of the current sensor and the output conditions of the residual pressure sensor.

Abstract: A pressure gauge for semiconductor processing that defines an internal flow path from the socket inlet to the displaceable end of the Bourdon tube that is shelf free so as to be self drainable for internal cleansing and purging whereby to avoid any trapping of contaminants that could subsequently have a deleterious affect on the process.

Abstract: A pressure gauge is disclosed includes a snap-in interfit between a window and case and between the case and socket. A coiled Bourdon tube within the case directly drives a pointer located intervening between the window and a dial retained by the window.

Abstract: An automatic drilling system regulates the drill string of a drilling rig in response to any one of, any combination of, or all of drilling fluid pressure, bit weight, drill string torque, and drill string RPM to achieve an optimal rate of bit penetration. The automatic drilling system includes a drilling fluid pressure sensor, a bit weight sensor, a drill string torque sensor, and a drill string RPM sensor which deliver a drilling fluid pressure signal, a bit weight signal, a drill string torque signal, and a drill string RPM signal to a drilling fluid pressure regulator, a bit weight regulator, a drill string torque regulator, and a drill string RPM regulator. The regulators control a drill string controller in response to the above signals so that it manipulates the drilling rig to release the drill string at a rate which maintains the maximum rate of bit penetration.

Abstract: A diver's air tank pressure gauge having audible and visual alarms, an alarm pointer for indicating the pressure at which the alarms will activate, and a crank assembly for changing the position of the alarm pointer. The pressure gauge dial has a cutout for limiting the travel of the alarm pointer between acceptable high and low pressure limits. When the air tank pressure equals a preset alarm pressure, an electrical circuit is completed which activates the alarms. The diver can then turn off the alarms by resetting the alarm indicator to a lower pressure setting and continue the dive at a shallower depth.

Abstract: A gas pressure gage connected to a pressure tank includes a solid stem body which has a gas channel extending from the first end to the second end thereof. The solid stem body further includes a cavity which communicates the gas channel with the exterior of the gage. A spring-biased piston rod disposed in the cavity, provided with a sealing member, seals the gas channel unless the gas pressure in the gas channel exceeds the force of the spring member, or the piston rod is operated manually.

Abstract: A Bourdon tube pressure gauge has a movement amplifying mechanism comprising a pinion of segment shaped permanent bar magnets extending radially and terminating at a circular edge magnetically driven by a pivotally mounted rack segment having an arcuate band of permanent bar magnets arranged in parallel alignment with polar axes extending radially of the rack and transversely of the band. One of the poles of each of the magnets of the band is located along a driving arcuate edge thereof which faces and magnetically drives the circular edge of the pinion by magnetic attraction of opposite poles. The polarity of adjacent magnets on both the pinion and rack segment is reversed providing alternate N and S poles around the pinion circular edge and along the driving edge of the band, respectively. In one form of movement, the rack segment is formed with an opening and the driving arcuate edge faces the opening in which the pinion is positioned for operative magnetic engagement between the band and pinion.

Abstract: A pressure gage for indicating pressure and variations thereof of a physical variable being monitored. The gage is provided with a circular dial having on the face thereof a pheripheral marginal portion or border green in color and graduations disposed internally of the green peripheral border. A pair of movable arcuate opaque cover plates, each made as an arc of an annulus, are disposed coaxial with the dial and graduations on the face of the dial. The plates are movably mounted for positioning thereof selectively in a circumferential direction of the dial for partially covering the marginal peripheral portion or border of the face of the dial. The plates are positionable selectively so that two opposed ends thereof define a space therebetween so that a green area of the border, which defines a range of selected pressure graduations on the dial, corresponds therewith.

Abstract: A pressure measuring apparatus especially of aggressive fluids includes a manometer whose casing accommodates a diaphragm separating a first chamber within the casing from a second chamber within the casing. The first chamber contains a neutral fluid which transfers the pressure of the aggressive fluid provided in the second chamber and exerting a pressure onto the diaphragm to a mechanical indicator of the manometer for indicating the measured pressure.

Abstract: A Bourdon tube and its method of manufacture comprised of a displaceable portion having an arcuate extent of between 170 degrees and 190 degrees, with a controlled size opening contained in the edge face of each end. Secured pressure tight in one end opening is a capillary forming the non-displacement portion of the Bourdon tube, while secured pressure tight in the other end is a seal plug forming the tube tip of the Bourdon tube.

Abstract: A manometric instrument for use with air bottles of an underwater respirator for underwater diving, comprises a sealed casing having a transparent closure cover; a first fixed scale fixed within the casing for indicating pressure and having graduations based on a first unit of measurement; a second fixed scale fixed within the casing adjacent the first fixed scale for indicating pressure and having graduations based on a second unit of measurement; either the first or second units of measurement expressing units of length, and the other expressing residual pressure of air in the air bottles; an adjustable fixed scales; a first movable scale fixed on the support element and having graduations based on the second units of measurement and differing from the second fixed scale; a second movable scale fixed on the support element for indicating an ascent time as a function of either the depth under water and the residual pressure, when the support element is adjustably displaced such that a value on the first mova

Abstract: An improved switch point setting device for fluid process sensors monitoring a process pressure, including a cylindrical housing, an elongated threaded shaft rotatably mounted in the housing, and a movable post member with a threaded base portion threadably mounted on the threaded shaft within the housing and a dog-leg post portion extending from the housing to form a pressure set point. A coil spring within the housing biases the threaded base portion in positive threaded engagement with the threaded shaft. An O-ring provided around the base portion on each side of the post portion enables threadable movement of the base portion during set point adjustment while otherwise maintaining the base portion reliably in position.

Abstract: An improved movement construction for a condition responsive gauge instrument to transmit displacement motion with reduced backlash from a condition responsive element to an output drive. A first embodiment comprises a spring grip between the segment gear of the movement and the pivot actuator imposed by an integral wrap-around tail portion of the segment gear. A second embodiment comprises a second segment gear supported in parallel relation with the first segment gear and operative to impose a weighted relation on the pinion of the output drive. A third embodiment comprises a combination of the first and second embodiments.

Abstract: A force-balance pressure measuring instrument incorporates a fluid pressure couple. The couple constructively includes a fulcrumed beam. The primary element is connected to the force-balance beam through a proportional band adjustment having a leaf spring which is changed in effective length. At certain settings of the leaf spring in the proportional band adjustment, oscillations, or pulsations, of the fulcrumed beam are generated. A compensation beam is pivoted on the fulcrumed beam to respond to the pulsations or oscillations of the fulcrumed beam and absorb energy to reduce pulsations or oscillations.

Abstract: A liquid-filled pressure gauge comprising a cup-shaped housing in which a metering element is located whose interior is subjected to the pressure to be measured. The front side of said housing is covered by a stiff face plate on whose inner side a transparent, resilient membrane is disposed in spaced relation which seals off the interior of said housing and which is deflected during temperature-related changes in the volume of the liquid filling. The space between the membrane and the face plate is vented externally. The transparent membrane ensures pressure compensation in the interior of the housing, while the stiff face plate protects the pressure gauge from damage to the front.

Abstract: A fluid pressure gauge type pressure responsive gauge drive having a drive to a sensor controller system with sensor controllers actuatingly engaged at respective adjusted pressure limits with gauge movement travel unimpeded by sensor controller contact in the range of movement between sensor controller pressure limit position settings. The drive may be connected to drive a fluid pressure gauge needle over an indicating dial and upper and lower pressure limit setting needles are adjustable to desired settings over the indicating dial. Calibration structures are provided for a coordinated setting of the gauge dial drive and in the drive of the sensor controller system calibrating each gauge structure for the "C" type bourdon tube installed.

Abstract: A guage such as is used in connection with a Bourdon tube comprises two bearing plates, at least two metallic spacer columns interconnecting the bearing plates, a pointer shaft rotatably mounted between the bearing plates, and a spiral spring fixed at its inner end to the shaft. One spacer column has an axial slot extending from one end of the column for receiving the outer end of the spiral spring. The outer spring end is inserted into the slot when the pointer shaft carrying the spring is assembled thereby saving the extra step in the manufacturing process required for locating the outer spring end in conventional gauges of this type. The slotted end of the spacer column extends beyond the outer side of the respective bearing plate so that the slot may be engaged by a screw driver for pre-tensioning the spring after complete assembly of the gauge.

Abstract: A pressure gauge in which the amplifier communicating displacement motion of the pressure responsive element to the pointer indicator, is mounted in a spring suspension isolating it from the force transmitting rigid components of the gauge. The spring suspension is effected by a pair of spring members connected to the amplifier including one spring member supporting the amplifier in its isolated relation and another spring member enabling operation of the amplifier to be effected.

Abstract: Amplifier apparatus for providing output motion correlated to condition change motion or deflection of a condition responsive element. The amplifier in a preferred embodiment is mounted onto the condition responsive element for floating conjoint movement therewith. A remotely connected actuator, extending into the motion path, defines a pivot axis for a hinged gear sector arm of the amplifier. In pivoting about the actuator axis, the sector arm operably drives a rotatable output shaft supporting a pointer or the like.

Abstract: A tube spring manometer that includes a deviation detector spring connected to an indicator by a tie rod, and the spring is subjected to a reference pressure for spring deflection measurement.

Abstract: An optical null detector design achieves exceptional efficiency of light utilization with a minimum of components providing (1) extremely sharp null recognition, (2) superior long term stability, (3) extremely low power requirement, and (4) minimal size and weight as well as several other desirable properties.The device involves the use of an inherently directional light emitting pattern (DLEP) of optimized geometry, generating nearly all usable light and eliminating several components functionally necessary, though performance limiting in conventional devices. It is particularly suited, though not restricted, to measurement and control applications by means of feedback techniques when high resolution, large dynamic range, and space economy are required simultaneously with sustained effectiveness over long periods of time.

Abstract: A fluid pressure gauge type pressure responsive gauge drive having a drive to a sensor controller system with sensor controllers actuatingly engaged at respective adjusted pressure limits with gauge movement travel unimpeded by sensor controller contact in the range of movement between sensor controller pressure limit position settings. The drive may be connected to drive a fluid pressure gauge needle over an indicating dial and upper and lower pressure limit setting needles are adjustable to desired settings over the indicating dial. Calibration structures are provided for a coordinated setting of the gauge dial drive and in the drive of the sensor controller system calibrating each gauge structure for the "C" type bourdon tube installed.

Abstract: Manometers with a tube spring metering element are provided with multiple range measurement capability by means of a stop element which is adjustable and yieldable so as to convert non-linear movement of the associated part of the tube spring metering element to linear movement.

Abstract: A dry pressure gauge with a circular spring interconnecting the operational movement end of the Bourdon tube sensor and the driven mechanism that includes added mass to dampen frequencies above a desired design level. The added mass takes the form of added weight on the gauge needle in the form of a circle of material, weights on opposite sides of the needle from the pivot center, or a single mass weight on the needle below the pivot center. Circular spring to mechanism interconnect slotting is included, normally biased to an end limit by a bias spring in the driven mechanism, to allow below connecting spring force movement between the sensor and the driven motion translator to reduce friction.