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Class 73/1.41 - Optical or magnetic sensing


Subclass of Class 73 - Measuring and testing
Definition: Subject matter comprising a sensing means whose characteristic
No. of patents: 25
Last issue date: 03/25/2008


NumberTitleIssue Date
7349760System and method for sensing and controlling the concentration of a chemical agent in a solution
A system for measuring and controlling the concentration of a chemical agent in a solution has a reaction cell for receiving a sample, a titrant dropper for releasing one or more drops of titrant into the sample, a first photosensor for sensing disruptions of light ...
03/25/2008
7269992Magnet orientation and calibration for small package turbocharger speed sensor
A method and system for orienting and calibrating a magnet for use with a speed sensor. A magnet can be mapped two or more planes thereof in order to locate the magnet accurately relative to one or more magnetoresistive elements maintained within a speed sensor hous...
09/18/2007
7165440Frequency characteristics measuring method and device for acceleration sensor
A metal rod guide (30) supports a metal rod (1) that can be inclined at an arbitrary angle, the support is instantaneously released to produce a free fall state, and during the release period, a first end surface (2) of the metal rod is impacted...
01/23/2007
7100839Method of servicing companies associated with a spray device operating under guidelines of a regulatory body
A method for servicing companies associated with a spray device operating under guidelines of a regulatory body includes capturing in vitro actuation data associated with operation of the spray device and distributing the data to a company associated with an aspect ...
09/05/2006
7009360Method for controlling SRM switching angle by analog encoder system
Disclosed is a method for controlling an SRM (Switched Reluctance Motor) switching angle by an analog encoder system that can perform a precise control of the switching angle of the SRM by comparing an analog sensor signal detected by the analog encoder system with ...
03/07/2006
6907133Automatic surveying system
An automatic surveying system includes a telescopic optical system; an image pickup device for picking up an image of a graduated face of a level rod, to which the telescopic optical system is to be collimated, and converting the image into image data; a memory whic...
06/14/2005
6807325Bragg grating device for measuring an acceleration
The Bragg grating device for measuring an acceleration, has at least two optical Bragg gratings (11, 12), each formed in elastic material, for supplying optical radiation (S) and at least one deflectable mass (M) connected to both gratings for generating an i...
10/19/2004
6708132Microsystems integrated testing and characterization system and method
An improved microsystems testing and characterization system which allows the system user to identify specific structures, and thereby to initiate an automated testing sequence to be applied to that structure or a series of structures. The integrated control system ...
03/16/2004
6647757Method for recognition of signal errors
The invention relates to a method for detecting rpm signal errors, in which pulses (t0, t2, t4, t6, t8 and t10) and pulse intervals (t1, t3, t5, t7, t...
11/18/2003
6526827Semiconductor sensor chip and method for producing the chip, and semiconductor sensor and package for assembling the sensor
The present invention is an acceleration sensor chip comprising a support frame part and a sensor structure. The sensor structure includes a displaceable weight part with a magnetic thin film formed on the surface and at least one beam part for connecting...
03/04/2003
6323943Vibration measurement method and apparatus
The present invention provides a vibration measurement method and apparatus utilizing a self-mixing type laser Doppler vibrator meter. The vibration measurement method includes steps of: oscillating a laser beam of a predetermined wavelength and applying ...
11/27/2001
6266146Ferrofluid 3-D gyroscope and light modulator
Apparatus and methods for passing a focused laser beam through a thin ferrofluid cell creates a spatial distribution in the refractive index of the ferrofluid and generates a diffraction ring patterns. Using a pair of perpendicularly placed ferrofluid cel...
07/24/2001
6260002Measuring method and apparatus thereof
A measuring apparatus is provided, in which a machined part is measured very simply and rapidly without affecting the effect unique to a machining center and the correction work with the measuring work can be immediately performed. The apparatus comprises...
07/10/2001
5893052Method and apparatus for testing sensing system performance
An apparatus and method for testing, for example, ABS systems in which a variable reluctance detector is positioned adjacent a ring of ferromagnetic teeth mounted on a wheel is provided. The amplitude and period of individual cycles of the output of the d...
04/06/1999
5818731Method and apparatus for measuring quality of frying/cooking oil/fat
A method and apparatus for measuring quality of cooking or frying oil in situ is provided. The oil quality sensor apparatus utilizes simultaneous monitoring of change in the capacitance and optical transmission of the oil in situ in the cooking or frying ...
10/06/1998
5644067Apparatus and method for calibration of sensing transducers
Reciprocity calibration of electromechanical transducers is carried out with three transducers, which are secured to a mass mounted for oscillation as a pendulum. A first transducer is driven and the electrical output of a second transducer is measured. A...
07/01/1997
5542280Automated gauge, assessment system and method
A gauge, system and method are disclosed for determining the accuracy and performance of a gauge by determining the angular deflection of the gauge needle in response to a known input signal. A frequency generator supplies a predetermined frequency signal...
08/06/1996
5481901Device for demonstrating and testing electronic meters for bicycles
A device for demonstrating and testing electronic meters for bicycles including a body portion having a slot, a rod mounted on the body portion, a plurality of seats mounted on the rod, a first magnet fitted on the body portion, a handwheel partially pivo...
01/09/1996
5020008Method of calibrating vehicle speed signals
A method of determining a calibration factor used to calibrate vehicle speed signals includes the steps of driving the vehicle over a measured distance, counting the pulses generated while driving the vehicle over the measured distance, and then calculati...
05/28/1991
4732034Tachometer 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
4488249Alignment error calibrator and compensator
In an airborne target acquisition and tracking system having a stabilization axis and an optical axis in which a slight mechanical misalignment is present, an apparatus and method for electronically compensating for such misalignment. A roll rate sensing ...
12/11/1984
4185489Speedometer tester
The speedometer of a stationary vehicle is evaluated for accuracy and calibrated regardless of vehicle tire size. The powered driven wheel or wheels is/are disengaged from road contact and a detachable housing member with a permanent magnet therein is rel...
01/29/1980
4156366Accelerometer
An accelerometer having an electromagnetic spring for restraint of an axially movable accelerator mass. The spring comprises at least one magnetic field transverse in direction to that of the mass and at least one conductor in the field, carrying current,...
05/29/1979
4143538Methods and apparatus for manufacturing tachometers
The manufacture of a tachometer of a type having annularly arranged tachometer markings on a rotary tachometer device includes the steps of rotating the tachometer device. A signal is generated having recurring signal portions for providing tachometer mar...
03/13/1979
4070901Speedometer and ratio testing apparatus
Testing apparatus for speedometers is disclosed including variable speed control driving means coupled to a flexible drive connection assembly that is adapted for connection with the speedometer. The drive connection assembly includes impulse generating m...
01/31/1978
 
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