K
Knobhead
Lucien,
Just spotted the link in one of you posts to DC meters. The Aron meter, I didn’t realise the Ayrton and Perry had evolved.
I used to have an apprentices text book from 1896, it showed the Ayrton and Perry dual pendulum gaining clock joule meter. My ex threw it out!
And before you lot start, it wasn’t my text book.
Just spotted the link in one of you posts to DC meters. The Aron meter, I didn’t realise the Ayrton and Perry had evolved.
I used to have an apprentices text book from 1896, it showed the Ayrton and Perry dual pendulum gaining clock joule meter. My ex threw it out!
And before you lot start, it wasn’t my text book.