Mechanism to move a window pane, between open and closed positions, has a limit stop to limit the movement of the push chain with a hook to catch a chain link bolt extension

摘要

The mechanism to move a window pane between closed and open positions has a push unit (7) working with a push limit as a limit stop (14) independent of the guide. It extends into the movement path of the push unit with a hook to catch its inner end out of the movement path for the next section of the push unit to move past it. The push unit is a chain, with an extension (16) of a chain link bolt (20) to be caught by the limit hook, which swings on a guide (21) and is tensed by a spring towards the push chain.