sash weight

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sash weight, sash counterweight

A weight (usually of cast iron) used to balance a vertically sliding sash.
References in periodicals archive ?
Perry does a quick scissors over the checker door, shoves an empty tub in place and unclips a sash weight, and then, with another scissors, muscles 50 pounds of tub and line astern.
Remove the top sash, cut the sash cords and take out the sash weight pulleys.
Then, run a weight (a sash weight, holed brick, or old-time cannonball gate weight) to the middle of the chain.
Tie the cord to the old sash weight and pull it taut, allowing the weight to rest on the bottom of the cavity.