Matches 51 - 100 out of 148 < 1 2 3 >
Match Document Document Title
5945591 Digital differential pressure gage and flow meter implementing signal difference processor  
A solid state electronic digital pressure gage which is responsive to the inlet pressure (P1) and the outlet pressure (P2) of a device undergoing a flow test to measure the pressure differential...
5894144 Semiconductor acceleration sensor  
In a semiconductor acceleration sensor, a weight and thin beam parts adjacent to the weight are formed on a substrate, a moving electrode is formed on the weight, and a fixed electrode is formed at...
5737246 Water depth measuring device  
A depth measuring device suitable for use in a dive watch is provided. A water depth measuring device comprising a pressure sensor, an A/D converter that converts the sensed signal of the pressure...
5691478 Device and method for remote zeroing of a biological fluid pressure measurement device  
A device and method for remotely zeroing a hydrostatic pressure compensation device are described which permit a fluid transducer, such as is used in conjunction with an intravenous catheter for...
5663505 Pressure sensor having a piezoelectric vibrator with concencentric circular electrodes  
A pressure sensor includes a vibrator having a diaphragm valve for detecting pressure. First and second circular piezoelectric bodies are located on a respective one of the two principal planes of...
5661278 Pressure responsive apparatus couples by a spring-loaded linearly moving carrier to operate a switch unit  
A miniature pneumatic switch apparatus has a diameter of three-eights inches and a height of five sixteenths inches and operates from minimal pressure to 100 psi. A pressure responsive unit...
5637801 Semiconductor diaphragm pressure sensor with grooves to absorb adhesive  
A semiconductor pressure sensor includes a pressure sensor chip including a diaphragm at the center thereof for measuring pressure and a die with an opening for introducing the pressure to the...
5635649 Multi-function differential pressure sensor with thin supporting base  
A multi-function differential pressure sensor includes a semiconductor chip, a stationary base having a joining portion joined to a thick wall portion of the semiconductor chip, and a housing...
5596147 Coplanar pressure sensor mounting for remote sensor  
A pressure transmitter comprises a first housing having a first and second diaphragm for receiving a first and second process fluid under a first and second pressure, respectively. The first and...
5596148 Pressure difference measurement transducer with electric lead-through in bore parallel to housing longitudinal axis  
A pressure difference measurement transducer with an inner housing divided into two parts transversely to its longitudinal axis has a central diaphragm bearing a pressure sensor clamped between the...
5583294 Differential pressure transmitter having an integral flame arresting body and overrange diaphragm  
A pressure transmitter apparatus having a Unitary body portion, separate diaphragms and flange elements and disposed within the body, a first and second normally vertical pressure passage. The...
5583296 Layered diaphragm pressure sensor with connecting channel  
A pressure sensor comprises a substrate and a layer defining together with said substrate a pressure sensor cavity, said layer including a diaphragmlike area which is adapted to be acted upon by an...
5567882 Pressure sensor using a field emission cold cathode  
The pressure sensor comprises an air-tight vacuum chamber consisting of a hollow cylinder and a pressure-reception diaphragm. The pressure-reception diaphragm is provided to face a space...
5537869 Integrated multichannel pressure measuring system and corresponding measuring process  
In order to study the aerodynamic phenomena occurring around structures of an aircraft, particularly during ground and flight tests, an automated multichannel pressure measuring system is proposed....
5499535 Pressure sensor and temperature sensor  
A force sensor comprises a substrate having a movable unit which is displaceable in response to one of an applied force and acceleration; an electron emission unit having a cathode for emitting...
5481919 Force multiplying pressure transmitter diaphragm and method employing flexible force transmitting column  
A pressure transmitter converts input pressures on the order of 0.000.15 inch of water column to proportional electrical output signals. A housing defines an open internal chamber and a...
5437189 Dual absolute pressure sensor and method thereof  
A dual absolute pressure sensor independently converts first and second external pressures to first and second electrical signals respectively. A package body has first and second openings for...
5429387 Low pressure switch/initiator/gas generator  
A single device acts as a pressure switch, gas generated heater, and an igniter. The device has pyrotechnic material such as a combustible gas in an inner chamber. An outer chamber, that is, a...
5386729 Temperature compensated microbend fiber optic differential pressure transducer  
A differential pressure transducer cell comprises a housing and a pair of spaced diaphragms connected at one end to one portion of the housing and connected at an opposite end to a second portion...
5317917 Resonant pressure transducer  
A resonant pressure transducer, having a deformable diaphragm or membrane exposed to an ambient environment wherein a pressure force to be measured exists, is provided. A transducer according to...
5310610 Silicon micro sensor and manufacturing method therefor  
A silicon micro sensor including a silicon substrate, a support element formed over an etched portion of the silicon substrate and a sensor element formed on the support element wherein the support...
5307684 Stop mechanism for a diaphragm pressure transducer  
A pressure transducer for measuring the pressure of a fluid comprising a housing having a cavity. A diaphragm capable of displacement is located within the cavity, dividing the cavity into a first...
5301554 Differential pressure transducer  
A field emission device with an emitter on a first layer of material and an anode on a second layer of material, separated by a predetermined distance, with a sealed region therebetween. Changes in...
5293137 Digital transducer system including two reactive transducers forming resonant oscillator circuits  
A variable reluctance transducer system incorporating digital control of parallel resonant circuits including two inductive sensors L1 and L2 on each side of a flat diaphram. The dual variable...
5277067 Miniature pressure sensor and pressure sensor arrays  
An improved pressure sensor element and pressure sensor array is formed by a cathode layer, a cathode tip attached to the cathode layer, and an anode layer opposing the cathode layer. The magnitude...
5225643 Differential pressure switch for stored gas pressure vessel  
Two electrically conductive diaphragms which are disposed in generally parallel relation and are symmetrical mirror images of each other are joined to a non-conductive ring. The diaphragms are...
5185709 Apparatus and method for measuring pressure changes within pressure vessels  
Apparatus and methods for detecting pressure changes within the chamber of a pressure vessel are disclosed. The apparatus includes a pressure transducer which is gauge-referenced to atmospheric...
5140113 Differential pressure control switch with a pivoting actuating lever and a biasing spring sealed in a housing  
A differential pressure control provides a housing having a pair of opposing inlets for accepting lines having different fluid pressures therein. The inlets are sealably connected to a central...
5122628 Sudden pressure rise detector  
Apparatus for detecting a sudden rise in pressure of a source thereof is disclosed which is especially useful for activating explosion suppression or isolation equipment by virtue of the fact that...
5076147 Pressure sensor including a diaphragm having a protective layer thereon  
The pressure sensor consists of a substrate and a diaphragm joined together around the periphery so as to form a chamber. The surface of the diaphragm facing away from the substrate is exposed to a...
5022269 Resonance frequency position sensor  
A position sensor includes a vibrating elongated member with a marker retained thereto in a sliding relationship thereon, wherein the marker coupled to a displacement of a target corresponding to a...
4945768 Pressure sensor  
A pressure sensor for accurate readings of low pressures utilizes an ultrasonic transmitter which sends a signal to a movable diaphragm via a waveguide. Pressure changes across the diaphragm causes...
4930041 Potentiometer position switch circuit  
A potentiometer position switch circuit which includes a meter mechanism having a low friction potentiometer coupled to move therewith. The output of the low friction potentiometer is coupled...
4841776 Differential pressure transmitter  
In a differential pressure transmitter, the respective measurement pressures are applied to a pair of barrier diaphragms respectively disposed on both side surfaces of a body, and movement of a...
4833920 Differential pressure sensor  
A cell for sensing differential pressures has a single brittle material diaphragm mounted on support plates positioned on opposite sides of the diaphragm. The diaphragm surfaces when at zero...
4833922 Modular transmitter  
A transmitter provides an output that is indicative of pressure and has two modular transmitter bodies, one including a sensor, and the other having an isolator diaphragm with a substantially...
4829825 Multiple diaphragm probe seal  
An improved diaphragm probe comprising a plate having a portion removed to form one or more cavities. At least two diaphragm strips sealed to close off each of the external openings of each of said...
4823604 Pressure transducer assembly  
The disclosed pressure transducer assembly comprises a transducer for generating electrical signals in response to differential pressures; a structure for encasing the transducer, the encasing...
4798089 Isolator apparatus  
An isolator apparatus for coupling pressure from a pressurized fluid carried in a conduit to a pressure sensor in a pressure transmitter having an isolation diaphragm, isolation fluid, and a...
4782703 Temperature compensated pressure signal generator  
A differential pressure signal generator uses a pressure sensor arranged to sense differential pressure between a pair of right and left pressure measuring chambers in right and left portions of a...
4754651 Differential pressure apparatus for measuring flow and velocity  
Apparatus measures airflow when used with a hood to control the flow of air through the hood. The apparatus measures air velocity when used with a pitot tube, a probe, or a grid. Differential...
4745810 Flangeless transmitter coupling to a flange adapter union  
A pressure transmitter is coupled directly to an industry standard flange adapter union having a standard bolt hole spacing. Small diameter isolator diaphragms are positioned on the transmitter...
4722228 Remote seal-type pressure signal generator  
A remote seal-type pressure signal generator has a pressure measuring end having a sealing diaphragm facing a pressure to be measured, a pressure detector body connected to the pressure measuring...
4701742 Pneumatic pressure switch for tire pressure monitor  
A pneumatically operated pressure switch for monitoring the air pressure in a tire is provided with a second switch in its housing capsule. The second switch is connected to an oscillating circuit....
4697643 Temperature-compensated pressure controller, operationally reliable extinguisher provided with such a pressure controller and process for filling such a pressure controller  
Extinguisher provided with a temperature compensated pressure controller, comprising a propelling agent and an extinguishing agent under gaseous form, wherein it comprises a sealed chamber filled...
4669316 Differential-pressure apparatus employing a resonant force sensor  
Differential-pressure measuring apparatus comprising a casing providing a closed chamber filled with fluid and divided into two sections by a pressure-responsive element. The input pressures are...
4655074 Self-zeroing pressure transmitter with automatic pressure manifold  
A pressure transmitter assembly comprises a pressure transducer having a pair of inputs each connected to a separate pressure line. A valve is connected in each pressure line. A pressure equalizing...
4655088 Unibody pressure transducer package  
A one piece housing suitable for housing semiconductor chips is molded from a polymer material. Electrical leads pass through a molded one piece housing to provide electrical contact between the...
4651569 Torque tube digital differential pressure sensor  
A digital differential pressure sensor with relatively low sensitivity to common mode line pressure errors. The sensor includes an airtight enclosure having a pair of pressure ports through which...
4644803 Force measurement apparatus and method  
Fluid density measuring apparatus and method for directly measuring fluid density or indirectly measuring force, acceleration, flow velocity, differential pressure and other parameters affecting...
Matches 51 - 100 out of 148 < 1 2 3 >