Model representing Murray's portable beam engine, with metal rod and bottom fitting belonging to the exhaust, by James Fox, Derby, 1808

This form of portable or self-contained condensing beam engine was brought out in 1805 by engineer Matthew Murray, of Leeds. It proved in practice to be not easily accessible, and only a few engines were therefore made. It is interesting, nevertheless, as having the same general arrangement as the side- lever steam engine which subsequently became the recognised type for marine purposes.