J&H McLaren & Co.

J&H McLaren was a British engineering company in Hunslet, Leeds, England, that manufactured traction engines, stationary engines and later, diesel engines.

The company was founded in 1876 by John and Henry McLaren. They had both been apprenticed to Black, Hawthorn & Co of Gateshead, builders of railway locomotive and marine engines. The new Midland Engine Works was situated on Jack Lane in Hunslet, Leeds within sight of many of the great engineering companies of Leeds, e.g. Hudswell Clarke, Hunslet Engine Co. Manning Wardle, John Fowler & Co. and Kitson & Co.

The company rapidly developed a range of traction engines, steam rollers, ploughing engines, agricultural implements and stationary engines. One of their forgotten achievements is the invention (see British Patent 763 of 1880) of the traction-centre engine, for driving steam-powered fairground roundabouts. This is often wrongly attributed to Savage of King's Lynn. In the 1890s, McLaren developed a range of vertical triple-expansion engines for the new industry of electricity generation. The zenith of this effort was a pair of 3000 ihp engines for Leeds Corporation’s Whitehall Road Power Station. After the start of the 20th century, the company introduced a tractor for direct haulage and a range of powerful direct-ploughing engines. The largest of these, rated 125 ihp, was fitted with superheater, feedwater heater and fully lagged cylinders. This provided a very efficient engine, which won many awards both at home and abroad. Other minor products were, showmen's engines, crane engines, portable engines, railway locomotives and Darby Steam-Diggers.

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