Sash balance | Article about Sash balance by The Free Dictionary
In double-hung windows, a device usually operated with a spring, designed to counterbalance the window sash without the use of weights, pulleys, and cords.
References in periodicals archive
Reset the tension on the sash balance
by reversing the earlier steps.
J Banks, which was formed in Willen-hall in 1846, is combining traditional design ingenuity with modern day problem solving skills to launch its East-Just range of spiral sash balances
for use in vertical sliding sash windows.