Wrist plate

(Steam Engine) a swinging plate bearing two or more wrists, for operating the valves.

See also: Wrist

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Then the system designs the full EOAT, including the wrist plate, along with a bill of materials, all dimensions, and the weight.
He also created a governor-controlled wrist plate that would control the steam and exhaust valves separately from each other, unlike the common slide valves in use at the time.