| Patents for G01H 11 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties (3,253) |
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| 04/23/1985 | CA1186045A1 Electret transducer with variable actual air gap |
| 04/23/1985 | CA1186044A1 Electret transducer with a selectively metalized backplate |
| 04/16/1985 | CA1185694A1 Electret transducer with variably charged electret foil |
| 04/03/1985 | EP0136027A2 Acoustic well logging device for detecting compressional and shear waves |
| 03/26/1985 | US4507705 Vibration analyzing device |
| 01/29/1985 | US4497046 Long line hydrophone |
| 01/22/1985 | US4495541 Apparatus for and method of making an electret tape |
| 01/22/1985 | US4494409 Engine vibration sensor |
| 01/08/1985 | US4493062 Resonant frequency modification of piezoelectric transducers |
| 01/01/1985 | US4491019 Detection of dynamic unbalances of centrifuges |
| 12/19/1984 | EP0128874A2 An improvement in sensor devices, particularly but not exclusively underground laid ones, operating on the principle of capacitive state changes and generally useful to warn of heavy masses passing by, and related systems for operating the device |
| 12/04/1984 | US4486660 Electron beam testing device for stroboscopic measurement of high-frequency, periodic events |
| 11/21/1984 | EP0125610A1 Evaluation of sound signals converted into electrical signals |
| 11/14/1984 | EP0124870A2 Pickup device for picking up vibration transmitted through bones |
| 11/13/1984 | US4482859 Object displacement sensor and device for measuring the rotation speed and vibration frequency of a rotor |
| 10/30/1984 | US4479389 Tuned vibration detector |
| 09/11/1984 | US4471303 Flexural vibration transducer with magnetic field generating |
| 09/04/1984 | US4470040 Microvibration detector using a single piezoelectric element as both sensor and alarm generator |
| 08/21/1984 | US4466288 Apparatus for sensing and locating vibrations |
| 08/15/1984 | EP0115822A2 Vibration noise suppressive rain sensor for a wiper control system |
| 08/14/1984 | US4466084 Seismometer |
| 08/14/1984 | US4465047 Knock detecting apparatus for combustion engines |
| 08/08/1984 | EP0115185A2 Apparatus for and method of random vibration control |
| 08/07/1984 | US4463610 Tuned vibration detector |
| 08/07/1984 | US4463596 Knock sensor for combustion engines |
| 07/31/1984 | US4462257 Strain sensitive ultrasonic surface wave detector |
| 07/31/1984 | US4462247 Knock detecting apparatus for internal combustion engines |
| 07/24/1984 | US4461179 Device sensitive to pressure waves |
| 07/24/1984 | US4461177 Acoustic emission transducer package |
| 07/17/1984 | US4459850 Apparatus for picking-up and analyzing emitted accoustic and ultrasonic signals in hollow bodies |
| 06/26/1984 | US4455755 Apparatus for sensing test values at test samples |
| 06/12/1984 | CA1169144A1 Vibration sensor |
| 05/15/1984 | US4448059 Engine vibration sensor |
| 05/08/1984 | US4446741 Vibration transducer |
| 05/08/1984 | US4446722 Vibration sensor, particularly knock sensor for internal combustion engines |
| 05/02/1984 | EP0107287A2 Ultrasonic beam focusing device with a concave surface and method of manufacturing the same |
| 04/10/1984 | US4441370 Vibration sensor |
| 04/04/1984 | EP0104592A2 Device and method for the demonstration of surface waves |
| 03/27/1984 | US4439642 High energy ultrasonic transducer |
| 03/07/1984 | EP0102069A2 Vibration analyzing device |
| 02/28/1984 | US4434327 Electret transducer with variable actual air gap |
| 02/21/1984 | US4432237 Ultrasonic transducer |
| 02/15/1984 | EP0100501A2 Vibration sensor |
| 01/31/1984 | US4429193 Electret transducer with variable effective air gap |
| 01/31/1984 | US4429192 Electret transducer with variable electret foil thickness |
| 01/31/1984 | US4429191 Electret transducer with variably charged electret foil |
| 01/31/1984 | US4429189 Electret transducer with a selectively metalized backplate |
| 01/10/1984 | US4424705 Engine knock sensing apparatus |
| 01/03/1984 | CA1159947A1 Ultrasonic array |
| 12/13/1983 | US4419896 Force or vibration indicating device utilizing microwave resonance ferramic gyrators |
| 11/29/1983 | US4417476 Charge converter for vibration monitoring instrumentation |
| 11/01/1983 | CA1156345A1 Vibration sensor for an automotive vehicle |
| 10/18/1983 | US4409816 Knock detecting apparatus for an internal combustion engine |
| 10/11/1983 | US4409441 Ultrasonic transducer for use in a vibratory environment |
| 09/20/1983 | US4404852 Frost sensor |
| 08/31/1983 | EP0086973A2 Tuned vibration detector |
| 08/23/1983 | US4399705 Acceleration detector |
| 07/26/1983 | CA1150527A1 Capacitive gauge |
| 07/06/1983 | EP0082956A1 Device for a contactless out-of-balance measurement |
| 05/03/1983 | US4382196 Tape transducer |
| 04/26/1983 | CA1145425A1 Coil assembly |
| 04/12/1983 | US4379404 Piezoelectric engine-knock sensor |
| 04/12/1983 | US4379403 Knock detecting apparatus for internal combustion engines |
| 03/01/1983 | CA1141983A1 Longitudinal isolation system for flexually vibrating force transducers |
| 02/22/1983 | US4374472 Vibration sensor |
| 02/15/1983 | US4373378 Vibration sensor for an automotive vehicle |
| 01/18/1983 | CA1139583A1 Process for compensating temperature variations in surface wave devices and pressure transducer utilizing this process |
| 01/11/1983 | US4367650 Fixture for mounting vibration sensor near limited access machine parts |
| 01/04/1983 | US4366702 Knock detecting apparatus for internal combustion engines |
| 12/21/1982 | US4364259 Vibration sensor for an automotive vehicle engine |
| 11/30/1982 | US4361045 Vibration sensor |
| 11/24/1982 | EP0065458A1 Capacitive detector for the displacement of objects |
| 11/23/1982 | CA1136254A1 Bi-directional impulse shear wave generator and method of use |
| 11/16/1982 | US4359767 Ultrasonic array |
| 11/09/1982 | US4357825 Knock detecting apparatus for internal combustion engines |
| 10/12/1982 | US4354131 Sensor with cross-base mounting plate |
| 09/14/1982 | US4348905 Vibration sensor for an automotive vehicle |
| 08/31/1982 | US4347478 Capacitive gauge |
| 08/18/1982 | EP0057982A2 Device sensitive to pressure waves |
| 08/17/1982 | CA1129985A1 Probe for electronic scanning type ultrasonic diagnostic apparatus |
| 08/03/1982 | CA1129061A1 Method and system for monitoring the angular deformation of structural elements |
| 07/27/1982 | US4341189 Knock detecting apparatus for combustion engines |
| 07/13/1982 | US4338823 Vibration sensor |
| 07/06/1982 | US4338575 Process for compensating temperature variations in surface wave devices and pressure transducer utilizing this process |
| 07/06/1982 | US4337643 Knock detecting apparatus for internal combustion engine |
| 07/06/1982 | US4337641 Device for detecting engine knock |
| 04/07/1982 | EP0048858A1 Signal processing device for electron beam measuring apparatus |
| 04/06/1982 | US4323994 Geophone spring |
| 03/23/1982 | US4321500 Longitudinal isolation system for flexurally vibrating force transducers |
| 03/16/1982 | US4319480 Knock detector device for internal combustion engines |
| 03/09/1982 | CA1119710A1 Electrostatic transducer having narrowed directional characteristic |
| 02/23/1982 | US4317005 Position-determining system |
| 02/23/1982 | US4316440 Knock detecting apparatus for internal combustion engine |
| 02/09/1982 | US4315214 Displacement sensor using a galvanomagnetic element positioned in a periodically inverted magnetic field |
| 01/12/1982 | CA1116285A1 Seismic method and apparatus including liquid filled accelerometers |
| 12/08/1981 | US4304629 To electronically discriminate between hard object impact and background noise |
| 12/01/1981 | US4302964 Knock sensor |
| 11/24/1981 | US4301888 Bi-directional impulse shear wave generator and method of use |
| 11/24/1981 | US4301887 Acceleration-responsive apparatus for sensing firing instant of an air gun |
| 11/18/1981 | EP0040113A2 Seismometer |