348
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174 Dempster, Henry, 1 Camion Street, HamburghPlace, Leith —Inventor.
Drawing of a simple telegraph, being a system of seasignals, which, by means of colours, indicate the lettersof the alphabet, numbers, and the points of the compass.Mast with model flag of the true size.
176 Pilkington, John, Goole, Leeds — Inventor.
A wrought-iron keelson, for wood-built ships. Its ob-ject is to give a greater degree of strength and durability,without any additional dead-weight, and to obviate thegreat difficulty in obtaining suitable lengths and sizes ofoak timber. This keelson, being tubular and perfectlywater-tight, assists in ballasting vessels when clear ofcargo, by opening a valve to admit water; it is afterwardslet off into the bottom of the ship, and pumped out inthe ordinary way. The keelson may be used as a water-tank.
[By lowering the centre of gravity of a ship its stabilityis increased: the best position for the ballast, therefore,is the lowest, viz., the keelson.—S. C.]
177 Corte, —, Inventor.
Model of a rocket apparatus.
178 Noulton & Wvld, Fore Street, Lambeth —Manufacturers.
London outrigger sculling boat, for racing; the bodyof this boat is in one plank, from head to stern, and sideto side, without a join or reel, and “ is the first boat sobuiltby this means a more beautiful mould can be ob-tained, and less resistance is offered to the water.
Model of an eight-oared shallop, with awnings; withan improved mould of floor and bow.
179 Biffen, William, Hammersmith —Inventorand Builder.
A rigged portable boat, the length of which may be re-duced from 30 feet to 10. In case of accident to anycompartment this boat will still float with her rower.
180 Hubbard, Charles, Dickleburgh, near Scole, Norfolk—Inventor.
Gutta percha portable boat, for crossing detached in-land waters; it carries two persons, and weighs only30 lbs.
Miniature working model of a portable machine forclimbing precipices; illustrated by a model of the cragson the Orkney coast.
Case of ornithological specimens.
*** From 181 to 197 with Class 5, Ground Floor North.
181 Brooker, James, Maryport —Designer.Figure-head: Ceres picking up the veil of her daughter
Proserpine.
182 Gladstone, John, jun., & Co., Liverpool —
Manufacturers.
Model of ship’s windlass purchase, for raising anchors,chain-cables, and other heavy weights on board ships.Sufficient to ride the ship without the possibility of havingthe windlass upset. With this machine less than half theusual number of hands are required to weigh the anchor,See.
[The ordinary ship’s windlass is a spindle-shaped beam,polygonal in transverse section, acting horizontally, atright angles to a line bisecting the ship from stem tostern, and working in and bearing upon stanchions, called“knight-heads,” strongly fixed to the ship’s deck anddeck timbers, immediately abaft the foremost. The useof the windlass is to raise or weigh the anchor by meansof the cable, which is made to take a turn round thewindlass beam, whose spindle shape enables it to present
itself at right angles to a line drawn from either hawse-hole, under which the anchor may lie ; for the ship is hoveshort upon her anchor by means of the more quicklymoving but less powerful capstan, before the windlass iscalled into action. The “ purchase” of a windlass is thepower applicable to work it, or rather the means provided,as the handspike levers in ordinary use, of applying thepower of the men to turn the beam, and wind or hoistup the anchor by its cable. Nothing can exceed thesimplicity or the strength of the ordinary ship’s wind-lass, having regard to the size and strength of the shipherself; but there is room for improvement in the modeof applying power, and in the speed of a windlass, whilstthe means of doing the same work with fewer hands wouldbe a great advantage.—W. H.]
184 Ferguson, C. A. & T., Mast House, Mill Wall,Poplai —Inventors and Manufacturers.
Model representing a mast 99 feet long and 33 inchesdiameter: the principal objects of which are, economy'in the first cost of materials, and the practicability ofbuilding large masts with small timber.
An improved fid for ships’ or steam-vessels’ topmastsand topgallant.masts, also for cutters’ bowsprits, to faeih-tate striking the same, without any necessity to ease o#lanyards, or heaving on the heel rope.
Also a model of the fid showing its action.
Two models of sections of deck, stanchions, Sec., of aship of war, with improved gun, for increasing the angleof horizontal pointing, and for projecting outboard atbows, sterns, and quarters, where the rake is so great;fitted with angle-meter, which will show the true positi° nof the gun. (Gun invented by H. R. Caselli.)
Registered gun-carriages and appurtenances, showingthe action of the improvements for working them.
Blocks, with sheaves and pins for them, showing thedifferent improvements introduced.
The old principle, wood sheave and pin. The iron-coaked sheave and iron pin. The brass-coaked sheaveand turned iron pin. The anti-friction gun-metal roller-coaked sheave and turned iron pin; and the highly com-pressed leather-coaked sheave, and turned iron pin.
185 Ansell, Charles, Tottenham — Designer.
Sailing-gun punt on a new plan, with water-tight bulk-heads, and the mast so placed as to allow the gun *be fired when under sail. Tackle for the same, caps"of being stowed within board. Adapted for wil<l-f°' vshooting on the coast. ^
Stanchion gun, with stub twist barrel, and improvespring, composed of discs of vulcanized India rubber,ease the recoil. Range, 150 yards.
186 Weld, Joseph, Lnlworth Castle, Wareham—Designer.
Model of a 12-gun brig-of-war, built on scientific p 11ciples, calculated to insure fast sailing.
187 Anderson, J., North Shields —Inventor.Model of a life-boat.
188
soll'l’l 6
Jeffery, Walsh, & Co., Marine Glue Works,Limehouse —Inventors.
Specimens of patent elastic, adhesive, and m s ° t>)marine glue, showing its utility in naval architecand its durability and cleanliness. _ ,,]e,
Piece of the mast of the “ Curajoa,” found insepar,even by the wedge, on return from South America. ^Piece of mast tested by the hydraulic press f eC t,required to remove one splinter—joints remaining P^ jj
giving an additional strength dispersed over the msurfaces of a first-rate’s main of 3,304 tons.
Section of the same, showing fracture.