[morzh]

Probably a clutch (whether magnetic or other); a switch does not work with governor, it is an on-off thing. Governor is an analog regulator. It could pull up a conical gear to change the ratio, or apply friction, whether mechanical or magnetic, but the swicth will onlhy work with some really large integrator, like a very massive disk, a flywheel of a sort, which will absorb the jerk of turn on/off.

[RadioSvit]

Was the phonograph made by Gerrard, it looks like a Gerrard tone arm?

Arran, maybe this player is similar to Gerrard, but it is still the original Marconi. Perhaps there was some cooperation between these companies, but it is hard to believe because as far as I am informed, they were competitors.

[morzh]

Think that was Garrard.

[Arran]

Mike;
  You are correct of course, it's "Garrard", must have slipped my mind yesterday. Another popular make was "Collaro" but I don't know how far back those go, apparently they manufactured record changers for Magnavox. 
Regards
Arran

[RadioSvit]

Friends, I did not find any Gerard automatic changer whose image and design would exactly match my player. If you have a photo or a link, please post them here for comparison. Here is a photo of my Marconi.
       

[RadioSvit]

New video about my transistor radios ...
"Summer... Nature... And again about transistors. A brief overview of new discoveries for the past autumn and winter"

[Video: https://www.youtube.com/watch?v=1jL0thsNVqg&t=9s]