Carburetor
The first carburetor was invented by Samuel Morey in 1826. The first person to patent a carburetor for use in a petroleum engine was Siegfried Marcus with his 6 July 1872 patent for a device which mixes fuel with air.
Electrification
The first commutator DC electric motor capable of turning machinery was invented by the British scientist William Sturgeon in 1832. The crucial advance that this represented over the motor demonstrated by Michael Faraday was the incorporation of a commutator. This allowed Sturgeon's motor to be the first capable of providing continuous rotary motion.