3707609

Information

• Patent Grant
• 3707609

• References
• Source

• Patent Number

  3,707,609

• Date Filed

  Not available

• Date Issued

  Tuesday, December 26, 1972
  52 years ago

• CPC

  • H01H13/7006 - comprising a separate movable contact element for each switch site, all other elements being integrated in layers
  • H01H2003/127 - Details of the key cap concerning the actuation by fingernails or having provision to allow usage with long fingernails
  • H01H2203/006 - Staples
  • H01H2205/03 - Apertured plate
  • H01H2215/036 - Metallic disc
  • H01H2217/008 - Pretravel to avoid inadvertent switching
  • H01H2217/02 - After travel
  • H01H2221/058 - to avoid tilting or skewing of contact area or actuator
  • H01H2223/034 - Bezel
  • H01H2225/018 - Consecutive operations
  • H01H2227/028 - Key stroke
  • H01H2227/032 - Operating force
  • H01H2231/002 - Calculator, computer
  • H01H2233/022 - with limited freedom
  • H01H2233/058 - One degree of freedom
  • H01H2233/074 - Snap coupling
  • H01H2235/002 - Linear coil spring combined with dome spring
  • H01H2235/008 - Rubber spring
  • H01H2235/018 - Spring seat
  • H01H2235/02 - between contact and substrate
  • H01H2239/01 - combined with other elements on the same substrate

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 341 - Coded data generation or conversion