I believe the pulleys and long coil spring is to counterbalance the elvating platform. The adjustment is for different weight cameras. I don't think the brake is designed to hold the weight. I believe the brake is only supposed to stabilise the platform and camera. This is the type of stand (but not the same make) that I saw in the photographic studio where my mother had her pictures done, the photographer showed me how even I (at age 6) could raise and lower the camera with a finger. I was admonished to never lift or lower it without first releasing the brake. This was in 1944.
Bookmarks