Second Elevator Safety Catch
On the end of the second elevator lever, near cam No. 10, either beneath or at the back side of the shaft, is a projection for the purpose of preventing the elevator from falling and being damaged should anything catch or hold the lever momentarily from following the cam. This projection engages with a safety pawl on the machine frame. This pawl must be released before the lever roller can rest on the cam. When the elevator descends at its regular time, the safety catch is held open by a raised piece on the surface of cam No. 10.