William Murdock's Locomotive, 1784.
This cut shows a longitudinal section of a miniature locomotive, made by William Murdock in 1784. It had a single vertical cylinder _" dia. by 2" stroke, the slide valve was actuated by a tappet motion, the beam striking it up and down alternately at each end of the stroke, the piston rod was connected to one end of a beam vibrating upon a joint at the other, as in the class of engines now known as "grasshoppers." A connecting rod was joined to the beam, close to its working end, and turned a crank in the axle of a pair of driving wheels 9_" dia. The cylinder was half immersed in a small copper boiler, through which a flue passed obliquely, the heat being supplied by a spirit lamp beneath. This machine is still in existence and is the property of Mr. Murdock, manager of the Sun Foundry, Leeds and grandson of William Murdock.
description of Murdoch's’s engine is given
in A History Of The Growth Of The Steam-Engine by
Robert H. Thurston.
A further description of Murdoch's’s engine is given in A History Of The Growth Of The Steam-Engine by Robert H. Thurston.