ALL POLICIES FREE OF STAMP DUTY. PROFESSIONAL LIFE ASSURANCE COMPANY.-Capital £250,000, with upwards of 350 Share. holders. Incorporated by Act of Parliament. In addition to the above, the following advantages are offered to the assured. All policies once issued, are afterwards indisputable, as appears on the face of the policies. Rates of premium extremely moderate. No extra charge for going to or from, or residing at, (in time of peace) Canada, Nova Scotia, New Brunswick, Australasia, Bermuda, Madeira, Cape of Good Hope, and Prince Edward's Island. A liberal commission allowed to agents. Prospectuses with Tables and fullest information may be had at the Company's Offices. IT 40........................£2 13 6 EDWARD BAYLIS, Resident Manager and Actuary. Offices, 76, Cheapside, London. GUTTA PERCHA. Wharf Road, City Road, London. cannot now be doubted even by the most sceptical, but that GUTTA PERCHA must henceforward be regarded as one of the blessings of a gracious Providence, inasmuch as it affords a sure and certain protection from cold and damp feet, and thus tends to protect the body from disease and premature death. Gutta Percha Soles keep the feet WARM IN COLD, AND DRY IN WET WEATHER. They are much more durable than leather and also cheaper. These soles may be steeped for MONTHS TOGETHER in cold water, and when taken out will be found as firm and dry as when first put in. Gutta Percha Tubing, Being so extraordinary a conductor of sound, is used as speaking-tubes in mines, manufactories, hotels, warehouses, &c. This tubing may also be applied in Churches and Chapels, for the purpose of enabling deaf persons to listen to the sermon, &c. For conveying messages from one room to another, or from the mast-head to the deck of a vessel, it is invaluable. For greater distances the newlyinvented Electric-Telegraph Wire covered with Gutta Percha is strongly recommended. Mill Bands. The increasing demand for the Gutta Percha strapping for driving bands, lathe-straps, &c., fully justifies the strong recommendations they have everywhere received. Gutta Percha Pump Buckets, Clacks, &c. Few applications of Gutta Percha appear likely to be of such extensive use to manufacturers, engineers, &c., as the substitution of it for leather in pump buckets, valves, &c. These buckets can be had of any size or thickness WITHOUT SEAM Or JOINT, and as cold water will never soften them, they seldom need any repair. Gutta Percha Picture Frames. The Gutta Percha Company having supplied HER MAJESTY THE QUEEN with several elaborate Gutta Percha Picture Frames for Buckingham Palace, which have been highly approved by the Royal Family, fully anticipate a great demand for frames from the nobility throughout the country. In order that the picture-frame makers may not be injured, the Company will supply the trade with the mouldings, corner and centre pieces, &c., and allow them to MAKE UP the frames. Pattern books for the trade are now ready. Gutta Percha soles, solution, inkstands, card-trays, medallions, picture-frames, brackets, mouldings, window-blind cord, soap-dishes, tap-ferrules, cornices, vases, fire-buckets, bowls, pen-trays, stethoscopes, thin lining, thread, flower-pots, ear-trumpets, &c., &c., manufactured at the Company's Works, Wharfroad, City-road, London; and sold by their Wholesale dealers in town or country. Joseph Deeley, of the London and Newport Iron Works, Newport, Monmouthshire, RE ESPECTFULLY recommends to the notice of the Public his Patent Foundry Furnace, which has been effectually tested and is now in constant use at the above works, where it may be inspected by all persons interested. This Furnace operates without the aid of any motive power to impel the air. An immense saving is the consequence, both in erecting and working. One-third of the coke usually required is more than sufficient; a loss of only twenty-two pounds to the ton being sustained in smelting. The Iron melted in this Furnace also undergoes an extraordinary improvement in quality.-Scotch Pig and Scrap being returned equal to the best cold blast in point of strength, and capable of being chipped or filed with the greatest facility. Foundries using the Furnace may exist in the most densely-populated cities, without causing the least nuisance, all smoke, dust, and noise being entirely avoided. The Foreign Patent Rights of the above are for disposal, affording Capitalists the most favourable opportunity for profitable investment.-Apply to the Patentee as above. To Inventors and Patentees. MESSRS. ROBERTSON & CO., PATENT SOLICITORS, 166, Fleet-street, London; and 99B, New-street Birmingham. (Of which firm Mr. J. C. ROBERTSON, the EDITOR of the MECHANICS' MAGAZINE from its commencement in 1823, is principal partner,) undertake The procuration of Patents For England, Scotland, Ireland, and all Foreign Countries, and the transaction generally of all business relating to PATENTS. Specifications Drawn or Revised. DISCLAIMERS, AND MEMORANDUMS OF ALTERATION PREPARED AND ENROLLED. Caveats Entered and Oppositions CONFIRMATIONS AND PROLONGATIONS Searches made for Patents, and Copies or Advice on Cases submitted, &c. &c. INTENDING PATENTEES supplied gratis with Printed Instructions, on Application, either personally or by letter. AGENTS: For Manchester, Messrs. Wise and Wood, 3, Cooper-street. For New York, Mr. Thomas Prosser, 11, Platt-street. Advantages of Registering Designs for Articles of Utility. Under the New Designs Act, 6 and 7 Vic. c. 65. Protection for the whole of the three Kingdoms by one Act of Registration. Protection for a term of three years. 201.) Protection immediate, (may be obtained in most cases within a couple of days.) Power of granting licenses for any of the three Kingdoms, or any of the cities, towns, or districts thereof, to one, two, three, or any greater number of persons. Summary remedy for Infringements. For a copy of the Act, with Table of Fees, and Explanatory Remarks, see Mechanics' Magazine, No. 1047, price 3d.; and for Lists of Articles registered under the New Act, see the subsequent Monthly Parts. Specifications and Drawings, according to the Provisions of the Act, prepared, and Registrations effected without requiring the personal attendance of parties in London, by Messrs. ROBERTSON and Co., Patent and Designs Registration Agents, 166, Fleet-street, and 99B, New-street, Birmingham; or by their Manchester Agents, Messrs. Wise and Wood, 3, Cooper-street. Ornamental Designs also registered under the 5 and 6 Vic., c. 100. GUTTA Gutta Percha. FACTOR PERCHA WEST HAM STRATFOR HANCOCK & CO. solicit attention to their very superior manufactures in GUTTA PERCHA, &c., which they continue to supply on their usual advantageous terms, having secured an unlimited quantity of the raw material previously to the late speculaiions in the market. As LICENSEES UNDER THE FIRST PATENT granted for the manufacture of Gutta Percha, they further beg to inform their Correspondents that with regard to any dealings had with H. and Co. for goods manufactured by them under their License, they are ready to hold all their customers harmless and indemnified from any proceedings which may be threatened to be taken against them, by ANT PARTIES assuming to be Patentees under subsequent Patents; the only stipulation on the part of H. & Co. being that they and their Solicitor shall have the conduct of any defence that may be considered necessary. NOTICES TO CORRESPONDENTS. Errata.-Page 563, line 2, of the 1st Example. Expunge the lin 15, and the dash over the 3. Page 576.-In the account given of the successful application of the Disc engine to the Minx steamvessel, the engine was stated to have been “Alled by Messrs. Bryan and Dorkin”—an error of the press which hardly needs correction, but it is still necessary to correct, as Messrs. Bryan, Donkin, and Co., (the firm referred to) though known to all the world as makers of paper-making and other descriptions of land machinery, huve not hitherto (we believe) made any trial of their skill in marine steam-engine building. To Engineers and Boiler THE BIRMINGHAM PATENT IRON TUBE Warner-Cores and Moulds ............. 596 Specifications of English Patents Enrolled 596 596 Haines-Packing for Pistons............ Burch - Printing...................... 396 Barlow Railways 597 Day Emery Cloth..................... 597 - Tuckett-Manure 597 Weekly List of New English Patents 598 393 593 MUSEUM, REGISTER, JOURNAL, AND GAZETTE. No. 1377.] SATURDAY, DECEMBER 29, 1849. [Price 3d., Stamped, 4d. LOMBARD'S PATENT HYDRAULIC ENGINE. [Patent dated June 9, 1849, in the Name of Mr. Joseph Samuda, as a Communication from Abroad. Specification enrolled Decmeber 9, 1849.] (From a Correspondent.) To all those who reflect upon the rapid strides that have been made of late years in every branch of mechanics, it must be matter of surprise that the science of hydraulics has made comparatively so little progress. Various contrivances, it is true, have been applied to the raising of liquids, by means of which a much larger quantity of fluid can be raised in a given time than could have been effected some years ago; but these improvements, however valuable, have rather had reference to the motive power by which pumps and other hydraulic machines may be worked, than to those machines themselves. Every person who is but cursorily acquainted with the principles upon which pumps are constructed, must be aware that there is one feature common to them all, however varied they may be in their form. They have all a piston, with or without a valve, that by moving in a cylinder, to which it is closely fitted, produces a vacuum in one part (generally the lower) of the cylinder, which is then filled by the pressure of the external air upon the well. The surface of the piston, which is on the other side of the vacuum, is invariably exposed, mediately or immediately, to the action of the external air. Now, as there is a vacuum on one side of the piston, it follows that each alternate stroke, either upwards or downwards, as the case may be, must be met by a resistance equal to a column of air of the height of the atmosphere, having for base the area of the piston, or equal to a column of water having the same base, and an altitude of 32 feet. This being the utmost that can be raised by the pump, it follows that the force to be applied to working the pump must in all cases be equal to the weight of water to be raised at each stroke, plus the friction of the piston, &c.; so that if a ton of water were proposed to be raised at each alternate stroke of the piston, a motive power of more than a ton weight must be applied. The great desideratum is then to neutralize the resistance of the atmosphere, and this object appears to be attained in a very simple manner, by the pump recently invented by Mr. Lombard, of Paris. It will be seen that advantage is taken of the well-known property which fluids possess of pressing upwards and downwards, to place the piston between two columns of water, so that the ascent is favoured by a force equal to that which opposes it, while the adjunction to the piston of a cylindrical box, whose bottom is pressed downwards at the same time as the piston itself is pushed upwards, neutralizes the action of the atmosphere, to which the piston is exposed, in descending. The solution of this problem of neutralizing the resistance of the air and water has led to the solution of that other problem, so often tried in vain, of working pumps by the alternate ascent and descent of boxes filled with water; and if no disturbing cause should arise to interfere with their proper action, it cannot be denied that the new invention will be of signal service in mining and all other operations where it is necessary to extract large quantities of water. All this may be better appreciated on a perusal of the following Specification, which has been deposited by the nominal patentee, Mr. Samuda : Specification. The said invention consists in obtaining a motive power from the rising and falling of water reservoirs or boxes, that fill and empty themselves alternately, and a certain arrangement of machinery or apparatus by which the water is supplied for that purpose with as little frictional resistance as may be. The most novel and essential feature of these arrangements, is a pump of a peculiar construction, a side elevation of which is given in fig. 1 of the accompanying illustrations. AA, CC, is a cylinder, having a lateral and horizontal arm on the upper part at B, and another lateral and horizontal arm at K: OO, is a piston, the limit to the ascent of which is the line ZZ, and the limit to its descent the line Z1 Z1. The cylinder may be in one piece, but it is better divided into three parts, as in the figure, viz., the middle one Z Z, Z1 Z1, and the two ends AA, Z Z and Z1 Z1, C C, to admit the piston rod. Upon the covering of the cylinder a shallow circular reservoir, RR, is placed, which has a cover, through which a screw, HH, runs, penetrating also through a hole in the covering of the cylinder, which it closes very accurately. To the arm, K, in the lower part of the cylinder is jointed a bent tube, V, surmounted by a chamber, N, in which is the spout, G. On the top of the bent tube, V, is a valve, hh', opening upwards. This valve may have its hinge at the circumference, h, or near the middle; and in either case the point, h1, of its circumference nearest the spout should be rather lower when the valve is down than the opposite one, h. The extremity of the spout, G, is placed above the level of this latter point, h. |