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
Workflow optimization for high throughput imaging environments
High surface area composition for use in the catalytic hydroconversion of a heavy hydrocarbon feedstock, a method making such composition and its use
Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display
Metal halide lamps with fast run-up and methods of operating the same
Key management using quasi out of band authentication architecture
System or method to assist and automate an information security classification and marking process for government and non-government organizations for information of an electronic document
Process for producing dipeptides or dipeptide derivatives
  Randomly Featured Patents
Coaxial dual dial resettable indicator
Mechanism of vibration type microphone
Viola plant named `Sunviolalemo`
Tape cassette and spring member therefor
Container closure having a thumb tab
Quinazoline derivatives
Biologically active 4H-benzo [1,4] oxazin-3-ones
Integrated circuit connector
Interferometric optical switch
Erythromycin derivatives, method for preparing same, and use thereof as drugs