Jones & McLaughlin Steel 0-4-0 "Switcher" Locomotives in the USA

Class 3 (Locobase 10806)

Data from "Pittsburgh Four-Wheel Saddle Tank Engine", Railway & Locomotive Engineering, Vol XIII, No. 1 (January 1900), p. 8. Probably works number 1700 in March 1897, 1701 in April, and 1777-1778 in January 1898.

The saddle-tank on this diminuitive industrial switcher had a flat top that was exactly even with the top of the cab and the stack. Rumary's list of Pittsburgh locomotives identifies these as 0-4-0s (implying a tender), but the number on the cab in the R&LE illustration is 4, suggesting that it was this saddle-tank design that was delivered.

Class 57 (Locobase 16679)

Data from Josh Edwards's 30 December 2024 email and Gene Connelly's Porter production list. Additional information from flickr reproduction of 58's Locomotive Encyclopedia record at[], last accessed 6 February 2025.Works numbers were 7244-7245 in July 1937. Works numbers 7613-7614 (J&L 60-61) in March 1944 and 8147-8148 (J&L 62-63) in October 1947 appear to have been built to the same design..

Narrow-gauge on the J&L steel works's property meant both rail width and loading (or clearance) gauge. Photos of the pair show the rectangular cube created when, like the Pittsburgh engines described in Locobase 10806, the saddle-tank's flat top on these diminuitive industrial switchers that lay exactly even with the top of the cab and the stack. The dimensions doubtless marked the smallest possible "hole" through which these engines could squeeze.

Steam entered the cylinders through piston valves.

J&L sold off the entire sextet to Crown Metal Products in 1969.