3627927

Information

• Patent Grant
• 3627927

• References
• Source

• Patent Number

  3,627,927

• Date Filed

  Not available

• Date Issued

  Tuesday, December 14, 1971
  53 years ago

• CPC

  • H01H13/807 - characterised by the spatial arrangement of the contact sites
  • B41J5/08 - Character or syllable selected by means of keys or keyboards of the typewriter type
  • H01H13/702 - with contacts carried by or formed from layers in a multilayer structure
  • H01H13/785 - characterised by the material of the contacts
  • H01H2201/026 - non precious
  • H01H2203/032 - Metal foil
  • H01H2207/024 - in top layer
  • H01H2209/002 - Materials
  • H01H2215/002 - Longer travel
  • H01H2217/018 - Indication of switch sites
  • H01H2219/028 - Printed information
  • H01H2221/026 - Guiding or lubricating nylon
  • H01H2221/042 - Foam
  • H01H2223/002 - sealed
  • H01H2223/034 - Bezel
  • H01H2223/036 - forming chamfered apertures for keys
  • H01H2225/008 - Two different sites for one circuit
  • H01H2225/022 - other then row-column disposition
  • H01H2229/028 - Adhesive
  • H01H2229/034 - Positioning of layers
  • H01H2239/05 - Mode selector switch

• US Classifications

  • 178 - Telegraphy
  • 200 - Electricity: circuit makers and breakers
  • 341 - Coded data generation or conversion
  • 400 - Typewriting machines