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| Number | Title | Issue Date |
| 7855550 | Velocity-detecting device A velocity-detecting device is mainly based on detection of charge, including a circuit board provided thereon with at least two capacitance sensors with potential difference. The two capacitance sensors are provided at different locations for detecting the time dif... | 12/21/2010 |
| 7345471 | Device and method for detecting the position and the velocity of a test object A device and method for detecting the position and velocity of a test object relative to a sensor, the sensor and the test object being arranged such that they can be displaced relative to one another. In one embodiment, the sensor has a measuring coil with one or m... | 03/18/2008 |
| 6933735 | Ramp arrangement and method for measuring the position of an actuator in a rotating media data storage device Ramp arrangements and methods in accordance with the present invention can provide the position or velocity of an actuator assembly in a rotating media data storage device while loading or unloading a head connected with the actuator assembly from a disk. One such a... | 08/23/2005 |
| 6519538 | Method for predicting stability characteristics of power supplies A method for determining the effect of load impedance on the magnitude and phase of loop gain of a power converter apparatus to aid in predicting stability of the converter apparatus under various operating conditions. The converter apparatus has an open-... | 02/11/2003 |
| 5712574 | Apparatus for position detection and verification thereof using pulse patterns having sequentially unique properties An apparatus for position detection using signal patterns created by use of a fixed disk having three conductive patterns disposed thereon. The first and second patterns are annular conductive paths which are concentric with respect to one another and the... | 01/27/1998 |
| 5537322 | System and method for determining a gradient speed of a shaft driven by an internal combustion engine In a system and a method for determining the speed gradient dn/dt of a shaft of an internal combustion engine, the speed gradient dn/dt is determined as a function of the third power of the speed and the difference between two segment times in the control... | 07/16/1996 |
| 5459397 | Speed sensor for rotatable shaft using shaft mounted antenna Apparatus and method for detecting rotation of a shaft include a first antenna for transmitting electromagnetic energy into the shaft, a second antenna disposed for rotation with the shaft for modulating electromagnetic energy passing through the shaft in... | 10/17/1995 |
| 5438261 | Inductive sensing apparatus for a hydraulic cylinder In one aspect of the present invention, an apparatus for determining an extended length of a hydraulic cylinder is disclosed. A piston and rod are contained within a cylindrical housing of the hydraulic cylinder. A coil is wound about the rod and is attac... | 08/01/1995 |
| 5210488 | Projectile velocity measurement system and method A projectile velocity measurement system for determining velocity of a lahed projectile in a launch tube in an underwater environment, the system comprising a transformer with secondary coils arranged in discrete groups with an increment of insulation sh... | 05/11/1993 |
| 4963829 | Shaft rotation analyzer using variable capacitance transducer maintained at a constant voltage A variable capacitor whose capacitance is a function of shaft position is coupled to a rotating shaft. A constant voltage is applied to the capacitor. As the shaft rotates, the changing capacitance of the variable capacitance causes current to flow into a... | 10/16/1990 |
| 4732034 | Tachometer kit with alternator pick up A vehicle tachometer kit including a pick up coil that is adapted to be mounted on the outside of the vehicle's alternator to sense its rotating field without any disassembly. An induced signal in the coil from alternator field leakage provides the normal... | 03/22/1988 |
| 4715009 | Device for determining angular position of a rotating part A device for picking up the position of an angle of a rotating part which is provided with angle markers 11 or teeth being simultaneously distributed over its circumference, whereby at least one angle marker and/or intermediate space between two angle mar... | 12/22/1987 |
| 4455555 | Control transducer An inductive displacement transducer includes a primary and at least two secondary coils with a movable coupling member for varying the amount of mutual coupling therebetween as a function of the displacement of a movable member. The secondary coils are w... | 06/19/1984 |
| 4445087 | Process and an apparatus for measuring the angular velocity of a rotating member The instantaneous angular velocity of a rotating shaft or the like is translated from the relative rotation of a mark carrier, having a scale of marks, and a sensing device. A series of signals are produced and processed in a calibrating run and thereafte... | 04/24/1984 |
| 4391250 | System for detecting the operation of the throttle valve A system for detecting the operation of the throttle valve of an internal combustion engine for an emission control system for internal combustion engines. The emission control system has a three-way catalyst convertor, a detector, such as an oxygen senso... | 07/05/1983 |
| 4355364 | Velocity sensing system A gear speed measuring system which is capable of measuring speeds down to zero, which is capable of use in a rugged environment, and which is relatively insensitive to gear-sensor spacing. The system comprises an electromagnetic sensor (20) connected int... | 10/19/1982 |
| 4255976 | Apparatus and method for measuring the velocity of a moving dielectric material An apparatus and a method for measuring the velocity of a moving dielectric material including establishing an electric field within the dielectric material to polarize the material; establishing a magnetic field within the dielectric material to induce a... | 03/17/1981 |
| 4214483 | Apparatus for measuring angular speed Apparatus for measuring the angular velocity and speed of a rotating shaft comprises charge storage elements for storing charge. The charge storage elements are capable of being coupled to the rotating shaft so as to be rotatable about a predetermined axi... | 07/29/1980 |
| 4203074 | Potentiometer circuit A potentiometer circuit by which a continuous, sawtooth 360 degree ramp output voltage is obtained from a single turn continuous rotation potentiometer having an annularly disposed resistance element and two angularly displaced rotatable wipers providing ... | 05/13/1980 |
