There are some old training videos that show how this worked: https://www.youtube.com/watch?v=gwf5mAlI7Ug
Also the Battleship New Jersey YouTube channel has some nice content on this: https://www.youtube.com/watch?v=szxNJydEqOs
See [1] for the basic mechanical components. It's a better scan of the same film the Periscope Film archive sells, which is the first one linked above. No sprocket clatter.
[1] https://www.youtube.com/watch?v=s1i-dnAH9Y4
See [1] for the basic mechanical components. It's a better scan of the same film the Periscope Film archive sells, which is the first one linked above. No sprocket clatter.
[1] https://www.youtube.com/watch?v=s1i-dnAH9Y4