| Description | Higginson’s Floors, Dickson’s Propellors and Hays’ Propellor Regulators (4 items).
1337. John Dickson's Patent Rotary Engine Propellors, Christopher Hays' Patent Propellor Regulators. Jan. 1845. 4 items.
John Dickson's patent for "Certain improvements in propelling vessels, gases etc., also for certain improvements in the rotative steam and engine, and likewise for improvements in steam boilers"; printed specification and large sheet of drawings of "Dickson's patent rotary engine propellors and steam boilers."
Christopher Dunkin Hays' patent for "Certain Improvements in Propelling Vessels" Jan. 1845: printed specification and small sheet of printed drawings of "Hays' improved mode of regulating the speed of propellors."
Original Portfolio or 'Book' No. 988. Catalogue of Old Engines p. 388.
Printed material collected by Boulton Watt & Co. and kept in the Drawing Office for reference. |