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MARINE INVENTIONS.

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Monthly List of PatentsCommunicated by Messrs. Wm. P. Thomp

son & Co., British and International Patent and Trademark Agents and Consulting Engineers, 323, High Holborn, London, W.C., and 6, Lord Street, Liverpool.

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ENGLISH (APPLICATIONS.) 1093. Robert Lindsey, Kingston-upon-Hull, York. “Improve.

. ments in the means or apparatus employed for plugging marine and other boiler tubes."

1160. John Richardson Wigham, Monkstown, Dublin. provements in illuminating lighthouses and other places.”

1190. George Allix, Southampton. An improved fid for the

upper masts of yachts and other vessels.” 1211. William Stroudley, Brighton. “A new or improved speed indicator for locomotive, marine, and other engines."

1220. James Clark, Barrow-in-Furness. “Improvements in and relating to tackle and gear för lowering, raising, and detaching ships' and other boats.”

1229. Henry William Hemsworth, Southend, Essex. “Improvements in apparatus for raising ships, anchors, telegraph cables, and other submerged property, such improved apparatus being also applicable to other purposes."

1247. James Bennie Scott, Pollockshields, Renfrew. " Im. provements in steering-engines."

1248. Charles B. Lee and Caldwell C. Jenkins, Pennsylvania, U.S.A. “ Improvements in apparatus for regulating the speed of marine and other stear-engines." (A communication.)

1292. Robert Bruce Smith, Glasgow. Improvements in steering engines and reversing engines, and in valves for the same and for other engines."

1330. John Isaac Thornycroft, Chiswick, Middlesex. “Improvements in propelling and steering ships or vessels and apparatus therefor.”

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1337. Henry Burgess Young, Greenwich. "Improvements in screw propulsion.”

1338. John Eccleston, Liverpool, and 323, High Holborn, Middlesex. “Improvements in apparatus for steering ships and other vessels."

1361. Joseph Olguin, Cambridge Gardens, Middlesex. “An improved apparatus for the loading and uploading of vessels."

1367. Samuel Marsh, Calais, France. “Improvements in the method of and apparatus for ventilating coal and other mines, coal laden and other vessels, and other confined spaces." (A cozamunication.)

1423. Agostino Rolando, City Road, Middlesex. “Improvements in apparatus for saving life at sea."

1446. Alfred Julius Boult, of the firm of Wm. P. Thompson & Co., 323, High Holborn, London, W.C., and 6, Lord Street, Liverpool, British and International Patent Agents (communication in trust from Charles Lyman Garfield, New York, U.S.A.) “ Improvements in processes and means for preventing and extinguishing fires in buildings or on board of ships.” (Complete Specification.)

AMERICAN 211705. Joseph Corduan, Brooklyn, N.Y. “ Water-mattresses for ships."

211738. Marcus Hulings, Oil City, Panama. “Marine governors."

212143. Carl Hülster, New York. “Spring guards or fenders for vessels."

212484. Frederick W. Moseley. “Bottoms for sheet metal vessels.” 212506. Daniel Risher, Dravosburg, Pa. “Lock-gates."

AUSTRIAN. 2949. E. Becker and H. Krueg, Vienna. “Improvements in apparatus for loading and unloading corn ships."

2967. C. Brava, A. Kloger, and H. Eidner, Vienna. "An apparatus for raising wrecks, goods, &c., from the bottom of the sea without any connection with the surface."

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equilibrium is supported on a ball and socket joint, and has a heavy weight suspended from it. The supporting structure attached to the floor or deck, follows the motion of the vessel, moving about the joint, whilst the heavy weight maintains its vertical position and the equilibrium of the article to which it is attached. Suitable locking apparatus may be added when required.

3374. John Isaac Thornycroft, Church Wharf, Chiswick. “Improvements in steering apparatus for vessels.” A rudder or paddle in the form of a blade or fish's fin is made capable by means of a movable joint of being caused to lie close against the vessel or to protrude into the water, in which position & sculling motion, which may be reversed, is imparted to it, and throughout such movement the blade exerts a propelling effect, its focus being during the whole time at some efficient working angle to the direction of movement. The motion thus imparted to the blade renders it capable of turning the vessel when not in rapid motion. To turn her in rapid motion the blade is simply turned to a suitable angle as an ordinary rudder. The paddle or blade has motion imparted to it for active steering by a connecting rod moving it fore and aft, and a second connecting rod constantly turning it to the angle suited to the point of its travel, motion being given to the connecting rods by a crank-shaft, which may be turned by any suitable engine.

3425. Farnham Maxwell Lyte, Scientific Club, Saville Row, Middlesex. “An improvement in screw propellers.” This has for its object the rendering more durable of iron and steel screw propellers, and making them less likely to foul than as at present constructed. On account of the blades of iron and steel propellers rusting and consequently becoming weakened and often breaking, they have been constructed of a much greater thickness than necessary for strength, in order that their inevitable dissolution may be retarded, and in consequence gun metal has been largely used as a substitute though a much inferior metal in point of strength. With the view to combine the advantages of lightness and strength, and to prevent fouling and oxidation, the inventor constructs screw propellers of iron or steel and

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protects them by producing on their surfaces by means of an ammoniacal cyanide copper bath and subsequently an ordinary sulphate of copper bath, a deposit of copper which enables the screw to resist oxidation and fouling.

3428. John Sacheverell Gisborne, Craigs Court, Charing Cross, Middlesex. “Improvements in ship telegraphs.” This relates to telegraphs for the purpose of conveying orders between officers and men and of repeating back those orders to show that they have been received. A transmitter, having a dial with divisions marked respectively with the different orders that have to be transmitted and an index movable by hand over the dial, is placed on the bridge, the receiving instrument placed in the engine-room has a dial and index corresponding with those of the transmitter, each dial having another hand for repeating the signals sent. On the axis of the index under the dial in the transmitter is fixed an arm carrying a roller which is pressed by springs against the interior surface of an insulated ring, into which ebonite (a non-conducting material) is let in at places corresponding with the spaces between the orders marked on the dial above. Upon turning the index to transmit an order, the roller, passing over the ebonite and conducting portion of the ring alternately, causes an interrupted electrical circuit, which by means of an electro-magnet, with a pawl upon its armature working a ratchet wheel at the receiver records the order upon that dial, a bell being set ringing at the same time by another electro-magnet continuing to do so till the order has been signalled back, a secondary dial, but with the mechanism reversed, being fitted to each instrument for this purpose. A modification of this signalling apparatus is also shown.

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