A chief mechanic; one who has charge of the machinery, etc., of shops.(noun)
The Century Dictionary (Public Domain)
Use "master-mechanic" in a sentence
"The footsteps entered the porch; there was a brushing on the mat, and the door of the room sprung back to disclose a rubicund man about thirty years of age, of thriving master-mechanic appearance and obviously comfortable temper."
"He is a pliable and obedient, even though it may be a virtuous and brilliant, tool of a spiritual master-mechanic who will use him according to his own purposes, in the interest of the society."
"When the rays of its electric headlight pierced the Western night they shouted like boys, ran to the telephones, and while the roundhouse, the superintendent, and the master-mechanic were getting the news the Special engine steamed slowly into sight through the whirling snow and stopped at the semaphore."