The window weight lived inside the wall. A lead cylinder on a rope. You never saw the weight but you felt it every time you opened the window. The weight was the counterbalance. You pulled the window up and the weight went down and the window stayed where you put it. The window weight was the first machine in the apartment that understood compromise.

The rope broke. It always broke. The rope was cotton and the window was heavy and the friction wore a groove in the pulley and one day the weight dropped to the bottom of the wall and the window would not stay up. You propped it with a stick. A broom handle. A book. The window was designed to stay open by itself and now it needed help. The machine was broken and the workaround was furniture.

My father knew how to fix the weight. He pried off the access panel on the side of the window frame. A small wooden door that nobody knew was there. Behind the door was the cavity and inside the cavity was the weight at the bottom like a dead fish in a well. He tied a new rope and fed it over the pulley and the window worked again. He was the only man on the floor who knew about the access panel. Knowledge was the tool.

The window weight was cast iron or lead. Heavy enough to balance a double-hung sash that weighed twenty pounds. The weight had a number stamped on top. The number was the pounds. If you put the wrong weight in the wall the window crept. Too light and the window slid down. Too heavy and the window slid up. The building was a system of balanced forces and the window weight was the proof that architecture is negotiation.

They put in vinyl windows. Spring balances. No weights. No ropes. No pulleys. No access panel. The vinyl window is lighter and cheaper and it does not need a counterweight hiding in the wall. But the old window had a sound. The sash sliding in the channel. The rope creaking over the pulley. The weight shifting behind the plaster. The window was alive. The vinyl window is silent. Silence is not always an improvement.

See also: Transom, Plaster Wall