Austrian Lloyd’s Steam Navigation Co. Steamers Imperatore and Empress, 1842, 1843,

Steam Boat Engines (33 items).

1198. Austrian Lloyd's Steam Navigation Co. Steamers Imperatore (LE & LF) and Empress (KZ & JA). Oct.-Dec. 1842, Jan., Feb., Jun., Jul. 1843, Dec. 1846. 33 items.
Two sets of two 80 horse power side lever boat engines.

Cross-section of boat and engines - reverse drawing made in the London office; section and plan of boiler - drawing made in the London office, with memorandum attached; paddle wheel and shaft; sections and plan of boiler - 3 partially coloured original drawings and 2 partially coloured reverse drawings; cross-section of boat at back of boiler, plan of engine and deck beams and longitudinal section of engine room and boiler, plan of engine sleepers, steam and feeding and blow out pipes, section of coal boxes at front of boiler - set of partially coloured reverse drawings made in the London office; plan and sections of coal boxes - partially coloured reverse drawing; front view of coal boxes - reverse drawing; steam pipes, feed pipes - partially coloured original drawings; blow out and injection pipes and brine pumps and pipes - coloured original and coloured reverse drawings; sections and plans of brine pumps - coloured reverse drawings marked "not adopted"; section and plan of boiler - partially coloured drawing marked as being for 2 60 horse engines; brine pump and valves - partially coloured drawing; throttle valve gearing, hand pump gearing - coloured drawings; headstock - partially coloured original and partially coloured reverse drawings; partially coloured sketch of boiler for 2 80 horse engines by Wallace Hamilton; tracing of boiler for 2 80 horse engines; press copy drawing of boiler; sheet of calculations re flue. Most of the drawings bear letter codes.
Also the following later items: sketch of shaft of Imperatore sent by Henry Jones and Leonard Wilkinson, sketches of shaft as first ordered and as drawn by Wilkinson, Dec. 1846.

Original Portfolio or 'Book' No. 945. Catalogue of Old Engines p. 320, 322.

For the Austrian Lloyd's Steam Navigation Co. One set of drawings was used for both sets of engines. Henry Hazleton allocated separate portfolio numbers to both boats, despite the fact that they did not have separate drawings; Imperatore was Pf. 1198, and Empress was Pf. 1199.