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Match Document Document Title
8245573 Method and device for identifying the free fall  
A method and a device are described for preventing damage to a device as the result of a free fall. First a free fall of the device is identified, and a measure is then taken to protect the device...
7891607 Pressure sensor device  
The invention is directed to a pressure sensor device for sensing decompression in a compartment, such as an aircraft cockpit, and causing a compartment door to be free to open substantially...
7424825 Barometric altimeter including a temperature compensation device  
The present invention proposes a portable barometric altimeter (10) including a pressure sensor (14), a calculation unit (16) which determines an altitude value (H) as a function of the pressure...
6430479 Methods, apparatus and computer program products for determining the vertical speed of an aircraft  
A method, an apparatus and a computer program product are provided for accurately determining the vertical speed of an aircraft in a manner independent of signals provided by an air data computer,...
5638059 Audible altimeter for parachutists  
The invention relates to an audible altimeter for use by parachutists. The altimeter comprises a sensor means 6 for sensing ambient air pressure, an electronic processor 5, a sounder device 4 and...
5532698 Transponder squawk calibration  
An altimeter system for aircraft employs an aneroid, dash mounted altimeter having a needle coupled to an encoder. The encoder provides a signal indicating that the needle points to a certain...
5423215 Self-contained heads-up visual altimeter for skydiving  
A compact altitude and rate of descent instrument is combined with a visual indication device and attached directly as a self-contained unit to protective eye wear or headgear for the...
4953404 Mechanism for an aneroid barometer  
Mechanism for an aneroid barometer comprising, in a support 2, a primary lever 4 whose center is in contact with the cell 3, the axis of rotation 40 of this primary lever being located at the...
4938062 Barometric meter  
A barometric meter such as barometer or a barometric altimeter comprises a vacuum chamber having a movable portion which displaces in proportion to air pressure. An aperture plate for allowing a...
4694694 Solid state accumulating altimeter  
An altimeter device employs a solid state pressure sensor having a strain-sensitive element directly in a silicon diaphragm, which is connected at one side to a closed vacuum chamber. The entire...
4674106 Mechanical counter having a digital display  
Each drum (5,6,28) of the counter is carried by a shaft (16,26,35) pivoted on the frame (1,2,3,4,11,12) by a bearing (18,19,27,36) which is autolubricating. Each bearing comprises a cylindrical...
4667514 Parameter sensors and monitors  
Parameter sensors and monitors are described incorporating one of a variety of parameter responsive structures constructed and arranged for expansion and contraction causing a component of motion...
4665747 Flight instrument using light interference for pressure sensing  
Aircraft instrument for indicating air pressure, air pressure rate of change and accelerations of the aircraft movement based on the use of an optical laser interferometer. The air pressure is...
4543824 Barometer  
A barometer which includes a vacuum housing, a pivotably supported pointer shaft, a return spring for the pointer shaft and a transmission mechanism, which exhibits a pivotably supported output...
4361048 Pointer instrument movement  
A pointer instrument movement is disclosed including a chassis of integrally moulded plastic, a pointer shaft rotatably mounted on the chassis, a lifting member, a measured value pickup which...
4327585 Refractometer  
A terrestrial refractometer comprises a gastight enclosure containing a fixed mass of a gas which at least approximates to an ideal gas, at least a part of the enclosure being movable in response...
4327583 Weather forecasting device  
A weather forecasting device comprises a pair of contacts disposed a predetermined distance apart from each other and a switch plate disposed between the contacts. The switch plate is movable...
4255970 Barometer mechanism  
An improved barometer mechanism is described having a simplified mechanical structure with a high degree of sensitivity. The barometer bellows is partially evacuated of air to a pressure about 10...
4253335 Barometric altimeter  
The altitude of an aircraft is determined by measuring the output of a pressure transducer on the aircraft because the altitude is defined by the atmospheric pressure at that point. In this...
4245508 Pressure indicator  
This invention relates to pressure indicators, and more particularly to an improved pressure indicator whose use is especially advantageous in sensitive pressure altimeters in which high...
4238958 Barometer  
A barometer of the type having a stabilized membrane capsule includes a transmission mechanism for transmitting the motion of the membrane capsule to a pointer mechanism. The transmission...
4154110 Housing assembly for barometer or other instrument having a settable index  
A barometer having an index on the crystal. The crystal is freely rotatable for setting the index. The barometer case has spring fingers preventing the crystal from being removed therefrom unless...
4117724 Ambient pressure sensor  
An ambient pressure sensor generates an electrical signal which varies in response to changes in ambient pressure level. The sensor includes a sealed bellows or aneroid which varies in length as...
4106342 Pressure measuring apparatus  
There is provided a pressure measuring apparatus, useful as a barometer, comprising a first variable volume vessel containing a gas, said first vessel being extendable and retractable between a...
4054058 Device for indicating direction of barometric pressure trends  
Direction of barometric pressure trend is portrayed by my invention. Changes in barometric pressure are amplified by a linkage member and converted into a signal by trend means to discern an...
4052597 Constant torque multiple drum counter  
An auxiliary force-applying mechanism is connected to a counter type altimeter for applying a supplemental force to rotate its counter mechanism at the time a Geneva type mechanism advances a...
4000652 Method and device for measuring the correction factor  
Two embodiments of a device and method are disclosed for providing a correction factor for the velocity of electromagnetic radiation in air. The devices include a pressure-responsive vessel having...
3977250 Encoding altimeter  
An encoding altimeter incorporating a feedback loop for providing visual output to a pilot of instantaneous barometric altitude and electrical signals which may be used for navigation or collision...
3916185 Circuitry for encoding altimeter  
In an altimeter having a commutator disc attached to the output shaft of the aneroid, an encoder for supplying a digital analyzer with an operational signal upon a change in altitude. Opaque and...
3874242 Pressure-responsive instrument  
A motion-transmitting and amplifying mechanism for a pressure-responsive instrument, such as an aneroid barometer, which includes a pressure-responsive capsule coupled by a motion-amplifying...
3867680 INSTRUMENTATION SYSTEM CONTAINING A NULL SHIFTING MEANS  
An instrument has a parameter indicator graduated in units which are a non-proportional function of movement produced by a parameter sensor element. The parameter sensor element is given a...
3858172 ALTITUDE DETECTING INSTRUMENT  
An instrument for detecting and signalling altitudes, of aircrafts, especially certain significant altitudes, in which a barometric unit is provided and which is arranged in controlling relation...
3829640 DIFFERENTIAL BAROSWITCH  
1. A differential baroswitch comprising: A first chamber, a second chamber, and a third chamber between the first second chambers; A pressure responsive movable element between the first and...
3797308 AIRCRAFT LANDING ALTIMETER  
An aircraft landing altimeter is obtained for indicating height above touchdown of a landing aircraft after passing a known distance and known height from touchdown point. The indicator pointer...
3789666 GAS-PRESSURE SENSOR  
A gas-pressure sensor comprising a mechanical resonator, the resonance frequency of which is closely bound to the pressure to be measured, and an oscillator controlled by the resonator. The...
3786681 ELECTROMAGNETIC WAVE MODULATION AND MEASUREMENT SYSTEM AND METHOD  
Electromagnetic waves with multiple polarization and/or propagation direction modes, preferably in the form of laser waves, are modulated by means of force-responsive devices such as amorphous...
3779075 AIR-DATA INSTRUMENT AND METHOD  
Means and method for sensing one or more sets of variable atmospheric and reference pressure phenomena and producing therefrom one or more sets of signals a first of which signals of all such sets...
3750474 ALTITUDE ENCODER  
An altitude encoder which provides a digital readout from a barometric sensor comprised of an aneroid bellows linked mechanically with a means to control the frequency of a sense oscillator. The...
3745384 RESONANT PRESSURE SENSOR  
A pressure responsive diaphragm or capsule having a variable self-resonant frequency characteristic is excited to vibrate in a mode other than the fundamental or f01 mode, that is, vibration...
3728898 ACTION UNIT FOR MEASURING DEVICES  
An action unit for a measuring device such as an aneroid barometer incorporates a U-shaped blade spring one limb of which is fixed to an adjustable support while the other limb, which is longer...
3668933 AIRCRAFT INSTRUMENTS  
An aircraft height-indicator shows height in pressure-based units that correspond to intervals of vertical distance which increases in magnitude as height increases and which define economically...
3668930 PARAMETER READ-OUT SYSTEMS FOR PRESSURE-FREQUENCY TRANSDUCERS  
Read-out systems which respond to an input signal having a frequency value that is variable with pressure to provide read-out of parameters having a non-linear relationship to the frequency of the...
3631722 NONLINEAR COUNTER  
A device for converting input rotary motion to output rotary motion according to nonlinear function, having a cylindrical cam with a curved way (input) and annular cam follower (output) sliding on...
3623051 ALARM BAROMETER  
An aneroid barometer with a U-spring has a magnet on the end of a long arm attached to the U-spring, so that the magnet will have greater movement than the U-spring. The magnet is proximate a...
3603282 POINTER-DIAL ARRANGEMENT FOR DUAL PRESSURE GAUGE  
A dual pressure gauge has an arcuate dial in a plane at right angles to the pointer axis, and has also a disk-shaped dial within the outer arcuate dial and flush therewith. The center dial has a...
3600948 FLUID PRESSURE-ACTUATED TRANSDUCER AND AIRCRAFT ALTITUDE MONITORING INSTRUMENT EMBODYING SAME  
A fluid pressure-actuated transducer and an aircraft altitude monitoring instrument embodying the transducer. The transducer has a fluid pressure sensor, such as a bellows, having a pressure wall...
3592063 CONTROL DEVICE FOR MINING EQUIPMENT  
The invention relates to a device which can be used in the remote control technique in mining and in particular hydraulic mining and serving for the conversion of a hydraulic pressure into a...
3589195 RUGGEDIZED ROCKING SHAFT  
A calibration arm assembly for a servo-pneumatic altimeter is connected to avoid degrading torque conditions so that the original sensing of the pressure actuated mode is maintained. The assembly...
3581571 FAIL-SAFE AIRCRAFT INSTRUMENT AND SERVO STABILIZER THEREFOR  
A fail-safe servo pneumatic indicating system is provided wherein the pneumatic drive is connected to the indicator of the instrument through a first gear train. The motor of the servodrive is...
3537308 ALTITUDE AND VERTICAL VELOCITY INDICATOR  

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