Mann's Patent Steam Cart and Wagon Company

This compact device allowed the sequence of valve opening of a steam engine to be changed, both in terms of "cut-off" and "direction" without the need for link motion and all the associated levers.

Around 1898 Mann and Charlesworth produced, on behalf of Philip Parmiter of Tisbury, an agricultural steam cart using the front end of a conventional traction engine and a roller at the rear.

Charlesworth left the partnership in 1898 and by September 1899 the organisation called Mann's Patent Steam Cart and Wagon Company was registered.

The success of the patent cart was such that Mann decided to construct a new works on Pepper Road, Hunslet, Leeds and the move was complete by December 1901.

In 1924 the company introduced their superb Mann Express wagon, with shaft drive, high-speed engine and fully enclosed cab.