The City of London Phonograph and Gramophone Society (CLPGS)
  • Home
    • Join Us
    • Donations
    • Website Updates
    • Archive
  • About Us
  • What's On
    • Diary
    • Events
  • News
  • Sound Library
    • Concert No.1 - Introduction to Cylinders
    • Concert No.2 - Christmas on Cylinders Concert
    • Concert No 3 - Scottish Music on Cylinders Concert
    • Concert No 4 - A Phonographic Tour of Continental Europe
    • Concert No 5 - The Edison Diamond Disc Concert >
      • The Concert
      • The Edison Disc - A Short History
    • Concert No 6 - Christmas on Cylinders Concert - Part 2
    • Concert No.7 - Berliner 5" discs
  • Info Centre
    • Collecting >
      • General History of Record Collecting
      • Machine Collecting
      • Phonograph & Gramophone Advertising
      • Nipper Memorabilia
      • Collecting Needle Tins
      • Collecting Cylinders >
        • Introduction
        • Care, Storage, Handling etc.
        • Cleaning, Reaming etc.
    • Machine Photo Gallery
    • ​Selected Bibliography
    • Beginner's Guides >
      • A Guide to Playing 78rpm Records
      • Calibration Strobes
    • Back to Basics >
      • The Reproducer and Sound Box
      • Speed Regulating
      • The Spring Motor
      • The Feedscrew and Half Nut
      • What Stylus Should Be Used
    • Useful reproductions from For The Record >
      • Flattening Warped or Dished Discs
    • Industry and Company Notes
    • Articles of Interest
  • Our Magazine
  • Shop
  • Adverts
    • Trade
    • Private
  • Contact Us
    • Contact Names
    • Questions - Contact us
  • Web Links

Speed regulating 
By Nipper

Regulating the speed of an acoustic phonograph or gramophone is most  important, and as for the reproducer and sound box (Back to Basics, part 1), the same basic principle applies on each machine.
Speed regulating
Speed regulating
The principle of the method is that the faster the speed of the shaft, the more the centrifugal force throws the weights outwards. The control of this governs the revolutions of the machine.

Each type of motor has  its own designed governor. They are not interchangeable. It is important that the weights and governor springs are as the original size and weight, and that when set up, they are balanced. The shaft should run freely in its bearings. The speed control flange should slide freely on the shaft. The control pad or pads should be lightly lubricated enabling them to slide smoothly on the flange.

With a worm driven system, the pressure of the worm drive tends to push the shaft in the direction of the drive, requiring that the end bearing be supported at its centre

Speed regulating

The method of adjusting the control pads varies on almost all motors. This normally involves a screw that adjusts through a level mechanism. All result in a fine movement of the pads, enabling the precise control of revolutions.
Follow us on Facebook!
Website by SKP Solutions