Model of Murray's portable beam engine, with metal rod and fitting

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.