3324644

Information

• Patent Grant
• 3324644

• References
• Source

• Patent Number

  3,324,644

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1967
  57 years ago

• CPC

  • G04C21/20 - by closing a contact to ring an electro-mechanical alarm
  • G04C21/00 - Producing acoustic time signals by electrical means
  • G04C21/38 - Adjusting the duration of signals
  • Y10T74/116 - Clock train

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 074 - Machine element or mechanism
  • 200 - Electricity: circuit makers and breakers
  • 968 - Horology