Propeller patent model
Propeller patent model
A scale model of a triple bladed feathering marine screw propeller, designed and patented by Henry Samuel Eyre, circa 1876.
Patent No: 1099, 14th of March, 1876. Letters Patent to Henry Samuel Eyre, of No. 9, Circus Road, Saint John's Wood, in the County of Middlesex, for the invention of "IMPROVEMENTS IN THE CONSTRUCTION OF SCREW PROPELLERS."
With patent agents box of W. Lloyd Wise, Adelphi, London, containing copies of the patent, provisional specification and specification, a printed board with engravings of the mechanism and contemporary press cuttings, and two photographs of the model with different shape screw blades.
The model of has a paper label attached reading: H. S. EYRE'S Blade Locked Feathering PROPELLER. and numbered: 582.
The single upright propeller blade, which rotates through 45 degrees, is engraved: H. S. EYRE'S Patent Feathering Propeller.
The base on which the the model stands has a brass label: H. S. EYRE'S PATENT. FEATHERING PROPELLER. - H. C. AHRBECKER. 117, Stamford St LONDON.
Height: 39 cm - 15 ½ inches.
Width: 46 cm - 18 inches.
Depth: 29 cm. - 11 ½ inches.
The printed board with engravings of the mechanism and contemporary press cuttings, dated 1876 &1877:
Marine Engineering News, June 1st, 1876:
"When from any cause it becomes desirable to put a screw steamer under sail alone, a considerable diminution of speed is occasioned by the drag of the propeller through the water. Various means have been devised to remedy this evil such as gear for hoisting the propeller entirely out of the water, or use of a donkey engine to keep gradually revolving; and in addition, various plans have been suggested for feathering the propeller blades. Amongst the latter, that which we now illustrate of Mr H. S. Eyre's, seems to possess the very important qualities of simplicity and efficiency, and mechanically to recommend itself for adoption."
Engineering - The Field, April 21st, 1877:
"In Yachts supplied with auxiliary steam power, a good feathering screw is of the utmost advantage. We have recently had the opportunity of inspecting such a screw, invented by Mr. H. S. Eyre. It can be applied as shown to a three-bladed screw, and the blades are brought "fore and aft," by what is really a very simple contrivance, although it looks rather complicated from the engraving.
The Mining World and Engineering Record, April 28th:
Now to Yachts furnished with steam-power, a good feathering screw is decidedly a desideratum; and what claims to be an improvement upon anything of the kind yet put before the public has been invented by Mr. H. S. Eyre.