Blower

[1] Also called a supercharger or turbocharger. This is a pump which forces air into the cylinders at higher than atmospheric pressure. The increased pressure forces more air into the cylinders than what would be drawn in normally. In this way the engine can burn more fuel and thus produce more power. There are two main types of blowers: the turbocharger, which uses some of the waste heat energy in the exhaust gases to drive a compressor and pump the air; and the belt-driven or shaft-driven supercharger which uses engine power to pump air.
[2] A fan for an interior heating and ventilating system or even for an air-cooled engine.
[3] A ring-shaped perforated pipe, encirling the top of the blast pipe in the smoke- box, to which steam is supplied while a steam engine is standing, the jets providing sufficient draft to keep the fire going. See also heater blower