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Class Information
Number: 324/175
Name: Electricity: measuring and testing > Electrical speed measuring > Including speed-related frequency generator > Including radiant energy detector
Description: Subject matter in which means for producing a speed signal includes means responsive to radiant energy (i.e., electromagnetic or atomic radiation) to produce or alter an electric current.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8531182 Control system and method for providing position measurement with redundancy for safety checking Sep. 10, 2013
8493017 Electrical drive with switchable coil sections Jul. 23, 2013
8373409 Fan speed testing system and method Feb. 12, 2013
8334687 Systems and methods for measuring rotational speed and position of a rotating device Dec. 18, 2012
8315848 Measurement method of the current-voltage characteristics of photovoltaic device, a solar simulator for the measurement, and a module for setting irradiance and a part for adjusting irradiance Nov. 20, 2012
8169214 Angular position sensor May. 1, 2012
8148974 Pulse generator wheel, preferably for shafts, and method for manufacturing such a pulse generator wheel Apr. 3, 2012
7663503 Meter register having an encoder for measuring material flow and an algorithm to selectively block signal transmission Feb. 16, 2010
7385387 Signal processing circuit of rotation detecting device Jun. 10, 2008
6825654 Airbag deployment monitor and sensing electronics Nov. 30, 2004
6724183 Method and apparatus for detecting bearing failure Apr. 20, 2004
6577117 Rotation sensing device of fan apparatus adapted to chamber of handler Jun. 10, 2003
6504355 Device for measuring an electric current by Faraday effect Jan. 7, 2003
6400137 Optical fiber with crimp and for sensing wheel rotation Jun. 4, 2002
6018302 Mechanical pointer drive for avionics display Jan. 25, 2000
6016056 Measurement of displacement and speed in an injection molding machine Jan. 18, 2000
5990676 Method and apparatus for detection of a moving speed of a mobile terminal in mobile communication Nov. 23, 1999
5990675 Anti-friction bearing with speed measuring devices having an active microcircuit and a frequency generator Nov. 23, 1999
5965825 Pulse encoder for a liquid dispensing device Oct. 12, 1999
5926017 Device for measuring the rotary frequency of a rotating vehicle wheel and vehicle tire for use in the device Jul. 20, 1999
5818221 Fiberoptic velocity transducer including dielectric coating for filtering and velocity determination Oct. 6, 1998
5763778 Apparatus for measuring vehicle speed Jun. 9, 1998
5734159 Rotation sensor using a radiation emitter and detector and a duty cycle feedback loop Mar. 31, 1998
5719497 Lensless Magneto-optic speed sensor Feb. 17, 1998
5652509 Device for determining the velocity of a longitudinally traveling elongate textile material, especially a yarn, using electronic sensors Jul. 29, 1997
5636014 Method and apparatus for determining the rate of angular rotation of a rotating object Jun. 3, 1997
5631559 Method and apparatus for performing magnetic field measurements using magneto-optic kerr effect sensors May. 20, 1997
5617022 Fiberoptic velocity transducer including dielectric coating for filtering and velocity determination Apr. 1, 1997
5602946 Fiber optic sensor system for detecting movement or position of a rotating wheel bearing Feb. 11, 1997
5502377 Method and apparatus for measuring rotary movement of a shaft Mar. 26, 1996
5497080 Rotation velosity sensor for a tape reel disk in which light is reflected off of the reel disk Mar. 5, 1996
5475620 Ultrasonic measuring system Dec. 12, 1995
5442281 Method and apparatus for deriving power consumption information from the angular motion of a rotating disk in a watt hour meter Aug. 15, 1995
5384534 Self-powered electro-optic rotational position sensor with magnetic pickup Jan. 24, 1995
5304886 Printed circuit motor Apr. 19, 1994
5250805 Optical sensing technique providing built in test Oct. 5, 1993
5233296 Floppy disk drive revolution detector avoiding interference with magnetic circuit Aug. 3, 1993
5214278 Apparatus for monitoring speed and lateral position of a rotating shaft having reflective surfaces May. 25, 1993
5204619 Device for measuring rotational speed using an optical fiber sensor Apr. 20, 1993
5204620 Photoreceptor motion sensor using a segmented photosensor array Apr. 20, 1993
5202627 Pedaling monitor for displaying instantaneous pedal velocity and position Apr. 13, 1993
5198738 Method of determining the rotational speed of a brushless DC-motor Mar. 30, 1993
5182512 Method and apparatus for determining relative contributions of individual cylinders of internal combustion engine using contact tachometer Jan. 26, 1993
5166611 Tone wheel with coined serrations for engaging an annular support surface and method of assembling same on a wheel bearing seal Nov. 24, 1992
5166741 Optoelectronic speed/direction detector Nov. 24, 1992
5153512 Speed measuring system utilizing magneto-optic switch actuated by magnetic field rotation Oct. 6, 1992
5130649 Speed detection apparatus having magnetic rotor with two magnetized portions and a crescent shaped non-magnetized portion Jul. 14, 1992
5130641 Eddy wheel edge sensor Jul. 14, 1992
5103213 Shaft rotation monitoring apparatus Apr. 7, 1992
5097708 Ultrasonic rotational speed sensor Mar. 24, 1992

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