scale having a fixed fulcrum and a movable counterweight whose distance along a horizontal graduated beam is moved to balance a suspended object
A steelyard balance, steelyard, or stilyard is a straight-beam balance with arms of unequal length. It incorporates a counterweight which slides along the longer arm to counterbalance the load and indicate its weight. A steelyard is also known as a Roman steelyard or Roman balance.
A 19th-century steelyard crane
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).