Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Measuring magnetic intensity independent of speed in a succession of moving magnetic strips










Image Number 5 for United States Patent #4380734.

The magnetic intensity in a succession of strips (12) in an article (10) is measured by producing relative motion between the article (10) and a magnetic sensing head (23) to produce a succession of first voltage waveforms. Each such waveform has a shape substantially characterized by the positions of the poles (13 and 14) in a respective strip (12). Each incremental portion of the shape has an amplitude proportional to the magnetic intensity sensed along the surface of the strip (12) and to the instantaneous speed of the relative motion between the sensing head (23) and such surface. By coupling a generator (31) to the article (10), a second voltage waveform is produced having a shape for each strip, wherein each incremental portion has an amplitude proportional to an instantaneous speed equivalent to the speed producing the first voltage waveform for the respective strip (12). The first waveform of a strip (12) is fed into the numerator input "Z" of a dividing circuit (36) and, simultaneously therewith, the second waveform for the same strip (12) is fed into the denominator input "X1" of the same circuit (36). Advantageously, the circuit (36) has a processing speed sufficient to produce a third voltage waveform of a shape wherein each incremental portion is independent of the speed of the relative motion and is faithful in amplitude and position to the poles (13 and 14) in each respective strip (12).








 
 
  Recently Added Patents
Television with a stand
Method for remotely measuring fluctuations in the optical index of refraction of a medium
Pyrazole kinase modulators and methods of use
Permeable pressure sensitive adhesive
Systems and methods for online search recirculation and query categorization
Method and structure for adding mass with stress isolation to MEMS structures
Haloalky -substituted amides as insecticides and acaricides
  Randomly Featured Patents
System for injecting protocol specific errors during the certification of components in a storage area network
Recording material comprising crystal of fluoran compound
Point-of-purchase advertising for shopping carts
Methods and devices for placing a gastrointestinal sleeve
Dresser
Method and apparatus for providing information security to prevent digital signature forgery
Apparatus for automatically manufacturing cupped food materials
Motor-drive controlling apparatus
Printing method, printing device and time recorder
Necktie