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| Number | Title | Issue Date |
| 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 (P) measured by the sensor (14) and as a fu... | 09/16/2008 |
| 7289929 | Correction of altimeters Altimeters correct themselves by analysing pressure data to identify underlying climatic changes and modify sensed pressures accordingly to provide corrected altitude values. The detected underlying climatic changes are used to provide a barometer function independe... | 10/30/2007 |
| 7194910 | Digital output MEMS pressure sensor and method A method and pressure-sensor system provide a digital-frequency output linearly proportional to a sensed pressure. The system comprises a MEMS pressure-sensing element to provide a pressure-sensing output and voltage-to-frequency converter provide the digital-freque... | 03/27/2007 |
| 7062364 | Electronic non-linear aircraft dynamic parameter display A method and apparatus is disclosed for displaying a dynamic parameter of an aircraft, the apparatus comprises a display unit receiving a display signal and displaying a scale that changes dynamically and non-linearly in accordance with a selected display algorithm,... | 06/13/2006 |
| 7009553 | Device and method for alert and density altitude features in a transponder A transponder having a subsystem for providing an altitude alert function signifying a deviation from a set altitude is described. The subsystem includes an input for receiving an altitude deviation limit associated with the set altitude, a CPU receiving updated alt... | 03/07/2006 |
| 6812853 | Telemetering system A telemetering system allows a receiver to provide an indication related linearly with the data from a sensor in a transmitter that comprises an amplifier composed of relatively inexpensive and low-quality parts. The transmitter includes an ID ROM (10) that s... | 11/02/2004 |
| 6715334 | Apparatus and method for manufacturing thick-walled bent pipe An apparatus and a method for manufacturing a thick-walled bent pipe with a simple structure at low production cost, which has durability and can manufacture an elbow material for piping with higher size accuracy, are provided. For this purpose, the manufacturing ap... | 04/06/2004 |
| 6662652 | Altimeter having correctable digitizer and method of use An altimeter (24) of the aneroid type having a correctable digitizer 26 is shown. When the pilot sets the altimeter to the local barometric pressure, the correctable digitizer is also set to the local barometric pressure. An input device (58) connected be... | 12/16/2003 |
| 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, an inertial reference system and an inertial navigation sy... | 08/06/2002 |
| 5148376 | Pressure instrument with depth/altitude and time display In a pressure instrument with depth/altitude and time display, a measurement time period from a starting instant up to a stopping instant of the time measurement is measured by measurement-time counting means, and also another measurement data is acquired... | 09/15/1992 |
| 5016473 | Altimeter The small altimeter according to the invention comprises a frame (7-11;14,15), a display comprising drums (45,79) and a dial (23) cooperating with a hand (46) and a multiplying gear train (53 to 57) driving the display in response to the displacements obt... | 05/21/1991 |
| 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 periphery of the support, an endless screw 5 equipped with a he... | 09/04/1990 |
| 4453154 | Altitude monitor An apparatus to continuously monitor a preset altitude for a pilot of an aircraft. It senses a change in altitude and an audible as well as a visible alarm tells the pilot that he has deviated from his preset altitude by a given height. Increase in altitu... | 06/05/1984 |
| 4403512 | Servo-type capsule-equipped instrument A servo instrument, particularly a servo altimeter, with a minimum of display error. The instrument comprises a capsule assembly, a sector adapted for rotation corresponding to the displacement of the capsule assembly, a photosensor for producing an outpu... | 09/13/1983 |
| 4143335 | Pressure sensor including a resistor commutator for providing unambiguous atmospheric pressure data A pressure transducer such as for use in a radiosonde includes a substrate and a plurality of conductive contacts formed thereon. An arm is movable over the contacts in accordance with the sensed ambient pressure. A group of resistors of different values ... | 03/06/1979 |
| 4133209 | Altimeter An instrument for providing an altitude representation in accordance with ambient atmospheric pressure has a mechanism that is manually-operable to effect adjustment to the setting of a datum against which the representation is provided. A mechanical feed... | 01/09/1979 |
| 4109607 | Reference index for instrument dials A reference index is provided for dial type instruments and includes an indicator selectively positioned on the face of the instrument for operation in either of two functional modes. The reference index includes a mounting pivot which is adapted to be se... | 08/29/1978 |
| 4106343 | Solid state barometric altimeter-encoder A solid-state barometric altimeter-encoder. The atmospheric pressure is cared to a reference vacuum on a hybrid IC pressure transducer which generates a proportional signal. This analog signal is then converted into digital data, corrected for atmospheri... | 08/15/1978 |
| 4052902 | Static friction free altimeter A piezoelectrical transducer for providing an altimeter with vibratory motion to attenuate the effect of static friction on the movement of a gear train responding to an altitude responsive aneroid.... | 10/11/1977 |
| 4023414 | Altimeters An altimeter has a pointer which rotates clockwise once round a dial for each thousand unit (feet or meters) increase in altitude, the zero of the dial being in the nine o'clock position. Two digital displays are situated one above and one below the horizontal... | 05/17/1977 |
| 4010646 | Barometric non-linear altitude compensator means A correction mechanism for supplying an altimeter indicator with a rotational torque to compensate for the non-linear relationship between pressure altitude and barometric pressure. The correction mechanism has a first gear for receiving an input force an... | 03/08/1977 |
| 4008618 | Flight instrument Aircraft altitude is visually displayed at a front panel of a flight instrument in analog form by a rotating pointer and in digital form by means of a rotary drum digital indicator. Barometric pressure is converted into rectilinear motion to drive a mecha... | 02/22/1977 |
| 4006638 | Altimeter-encoder An aircraft altimeter-encoder is provided with an altitude sensitive barometric or aneroid bellows which simultaneously drives a visual altitude indicator and an altitude digital encoder. The indicator includes one or more pointers that register with a di... | 02/08/1977 |
| 3978730 | Indicating instruments An altimeter has a rotatably-mounted index that is driven to rotate through one complete revolution around a scale for each change of 1,000 feet in altitude sensed by two evacuated manometric capsules the number of revolutions of the index is indicated by... | 09/07/1976 |
| 3968684 | Apparatus and method for determining optimum direction of process of sailing vessels Apparatus and a method for use in determining the optimum direction of progress of a sailing vessel from one point to a second point are described. The angle of leeway between the direction of heading of the vessel and the course of the vessel is measured... | 07/13/1976 |
| 3940990 | Flight instrument Aircraft altitude is visually displayed at a front panel of a flight instrument in analog form by a rotating pointer and in digital form by means of a rotary drum digital indicator. Barometric pressure is converted into rectilinear motion to drive a mecha... | 03/02/1976 |
