Abstract: A sash window system comprising a window frame including a side frame member, a window sash slidably mounted within the window frame, and a horn detachably connected to the sash. The horn further comprises at least one engagement feature which slidably engage the side frame member and slidably attach the horn to the window frame to retain horn to frame while allowing the horn to slide along the side frame member. The detachable connection arrangement preferably comprises a magnetic connection, comprising a magnet mounted on the horn which is attracted to the bottom of the sash and/or a metallic plate mounted therein.

Abstract: A modular spring support mounting for a sash window spring counterbalance arrangement includes at least a first spring support mounting element and a second spring support mounting element each for supporting a respective coil spring. The first spring support mounting element includes a pair of wedged shaped cross section projections. The second spring support mounting element includes an interengagement fitting which engages the pair of wedged shaped cross section projections to in use securely interconnect the first and second spring support mounting elements together. Also a method of installing such a modular spring mounting includes the step of laterally slidingly engaging the spring mounting elements to securely interlock the elements together.

Abstract: A modular spring support mounting for a sash window spring counterbalance arrangement includes at least a first spring support mounting element and a second spring support mounting element each for supporting a respective coil spring. The first spring support mounting element includes a pair of wedged shaped cross section projections. The second spring support mounting element includes an interengagement fitting which engages the pair of wedged shaped cross section projections to in use securely interconnect the first and second spring support mounting elements together. Also a method of installing such a modular spring mounting includes the step of laterally slidingly engaging the spring mounting elements to securely interlock the elements together.