| Description | Steam Boat Engines (15 items).
1238. J. B. Humphreys No. 3, Magdaburg (YC). Feb., Apr., Jun., Aug. 1816, Jan., Feb., Jul. 1817. 15 items.
30 horse power bell crank boat engine, with 31½ inch cylinder, 3 foot stroke.
Section of the boat and outline plan of the engine and boiler, showing 24 horse engine - drawing sent by J. B. Humphreys; air pump lid and bucket and foot valve, condenser and bottom of the air pump, piston rod cross bar and guides and stays, cylinder lid, cylinder side rods - reverse drawings marked "30 horse boat engine"; bell crank and eccentric rod - reverse drawing; 10 foot paddle wheels - partially coloured reverse drawing; cross-section of the boat and shafts and side view and plan of engine, damper and feed apparatus with chimney and end view of boiler with fire doors, spur wheels and clutches etc. - reverse drawings; sketch of proposed safety pipes; small sketch plan of boiler; drawing of fire place; sketch of plummer blocks, bolts and paddle shaft; sketch of clutches; press copy sketch showing working of the slide valve (eccentric etc.). The reverse drawings bear letter codes.
Original Portfolio or 'Book' No. 691. Catalogue of Old Engines p. 310.
For a German customer. J. B. Humphreys of Manchester was the agent. The engine is mentioned in T. Tredgold, The Steam Engine, appendix p. 100.
See also: 4/95 (Engine Order Book No. 9). |