BAFFLE (4)

Baf″fle, n. 1. 1. (Engin.) (a) A deflector, as a plate or wall, so arranged across a furnace or boiler flue as to mingle the hot gases and deflect them against the substance to be heated. (b) A grating or plate across a channel or pipe conveying water, gas, or the like, by which the flow is rendered more uniform in different parts of the cross section of the stream; — used in measuring the rate of flow, as by means of a weir.
2. 2. (Coal Mining) A lever for operating the throttle valve of a winding engine.