at or slightly above the middle of a typical double hung window this movement also occurs automatically as the sash remover holds the upper end of the tilted sash once the lower end of the tilted sash has reached its uppermost position where counterbalance springs 40 will lift it no higher then removal of the sash from the window can occur this is done by slanting the sash to lift one of the pins 25 vertically upward out of a shoe slot 31 this can be done without any interference from spring 40 and it is a likely movement for the sash remover to attempt in slanting the window for withdrawal once one of the sash pins 25 lifts upward to clear a shoe 30 and withdraw from liner slot 13 it follows naturally for the sash remover to lift the other pin clear of its shoe and out of liner slot 13 so that the sash is withdrawn from the window replacing a withdrawn sash is also simple instead of laterally replacing sash pins into shoes that are locked somewhere within the jamb liners and are difficult to see the sash replacer merely slants the sash so that the pins 25 can enter the liner slots 13 above the uppermost positions of shoes 30 then the sash is lowered so that pins 25 move downwardly into shoe slots 31 the outward flare at the upper end of slots 31 aids in this process and the offset mounting of spring 40.