In present day sash windows, you are more likely to discover a spring harmony (or sash equilibrium) procedure. This can be a spring-loaded system which counters the power of gravity, in result holding your sash window open with no need for cords, pulleys and those metallic counterweights.  It is now https://ufo-art-word67901.blog-a-story.com/16541202/how-sash-windows-can-save-you-time-stress-and-money