2132617

Information

• Patent Grant
• 2132617

• References
• Source

• Patent Number

  2,132,617

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1938
  86 years ago

• CPC

  • G03B7/00 - Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
  • G01R1/02 - General constructional details
  • G01R13/08 - Electromechanical recording systems using a mechanical direct-writing method
  • G01R17/02 - Arrangements in which the value to be measured is automatically compared with a reference value
  • H01C10/24 - the contact moving along turns of a helical resistive element, or vica versa

• US Classifications

  • 324 - Electricity: measuring and testing