The sheave was specifically made to have an area somewhat tapered from the center per edge (like an over-inflated car tire) so that the center of the sheave was a slightly larger size.

A sheave drove the level belt on the engine affixed to either a flywheel or the crankshaft. The engine was normally belted to the device powered by a wide flat belt, generally from 2 - 6 inches (5- 15 cm) large. They were a labor-saving device on ranches and aided farmers in accomplishing a lot more than they could formerly. These engines additionally ran some very early cleaning machines. They powered pumps for farming, saws for cutting wood, generators for electricity in rural areas, farm tools, and many other stationary applications. These engines run slowly- normally from 250 changes per min (rpm) for big horsepower engines to 600 rpm for little horsepower engines. This device protects against gas consumption during 'miss out on' cycles during the intake stroke. On the following down-stroke, a vacuum in the cylindrical tube opens the intake valve and allows the fuel-air blend to go into.

The guv lets the exhaust valve close when the engine is running at or below its speed. When the hit-and-miss engine is running over its speed, the governor holds the exhaust shutoff open, protecting against a vacuum cleaner in the cylindrical tube and creating the intake valve to stay shut, disrupting the Otto cycle firing mechanism. This vacuum occurs if the exhaust shutoff is closed during the piston's down-stroke. The intake shutoff on Hit And Miss Antique Gas Engine Partshas no actuator rather, a light spring holds the consumption shutoff unless a vacuum in the cylinder draws it open.

Hit and miss engine parts