Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Metal detector










Image Number 6 for United States Patent #8473235.

The present invention provides apparatus for scanning a product to detect metal in that product. The apparatus comprises a drive coil (4), for generating an electromagnetic field in the product, and a detection coil arranged to detect fluctuations in the magnetic field caused by the presence of a metallic particle in the product. A drive circuit (26) for the drive coil (4) comprises a plurality of switches (19 to 22) driven by a controller (16), which switch alternately connect the drive coil across a potential difference to cause the drive coil to be driven at an operating frequency determined by operation of the switches. Using a switching circuit to drive the drive coil (4) greatly increases the number of frequencies at which the drive coil may be operated. The invention has particular application to the food industry.








 
 
  Recently Added Patents
Dynamic facsimile transcoding in a unified messaging platform
Image processing apparatus, image processing method, and program to create a composite image from color image data and monochrome image data
Base station, relay station, and bandwidth allocation method
Estimating optical characteristics of a camera component using sharpness sweep data
Avirulent oncolytic herpes simplex virus strains engineered to counter the innate host response
Treatment of cancer using the sodium salt of a benzoic acid derivative
Placental tissue grafts
  Randomly Featured Patents
Eccentric gear for tattoo machine for adjusting the needle throw
Disabling an implantable medical device
Laser alignment device for sawmills
Methods and apparatus for design entry and synthesis of digital circuits
Airflow system for engine with series turbochargers
Unibody support apparatus and method
Downhole NMR processing
Compartmented sport bag
Brush for cleaning hook and loop type fasteners
Method and apparatus for complexity reduction in detection of delay and Doppler shifted signature sequences