Messrs. Heaton have supplied coins to no less than 39 states or authorities. In 1868, the Italian Government ordered five million lire in pieces of 10 centimes; and in consideration of the satisfactory manner in which this and other coinages had been carried out, his majesty, King Victor Emmanuel, conferred the honour of knighthood on the firm.
Electric Lighting.—[Henry Lea, M.I.M.E.]—The period of fifteen years following the last Meeting of the British Association in Birmingham, in the year 1865, was devoid of any undertakings in electric lighting, other than in the direction of the application of powerful arc lights for lighthouse purposes, as practised by Messrs. Chance Bros., of Spon Lane, near Birmingham, who, beginning in 1862 with apparatus having optical adjustments for electric arc lights of small power, proceeded to introduce more and more powerful lights, of which the Souter Point revolving light of the 2nd and 3rd order built in 1870, the South Forelands fixed lights, two in number, and of the 3rd order, built in the same year; the Sydney Heads light of the 1st order and of 11,000 candle power, built in 1880; and the flashing light at Tino, near Spezia, a lamp of the 2nd order, finished in 1885, are examples shewing the great progress made during the period referred to. The Sydney Heads light is said to be the leading light of the world. The motive power employed for it is the Otto silent gas engine. The carbons are 23 millimetres, or upwards of ⅞″ in dia. Particulars of these undertakings will be found in a special paper upon Lighthouse Work in another part of this volume. The first application of arc lighting for ordinary business purposes in this district is believed to be that of the Birmingham Household Supply Association Limited, which was fixed in the year 1880-1 under the superintendence of the writer, who employed a pair of 8″ × 12″ Horizontal Tangye Engines to drive a Brush Dynamo working sixteen arc lamps. Amongst other examples of arc lighting subsequently put down may be named those at Messrs. Brown Marshalls & Co.’s Carriage Works at Saltley, Messrs. John Wilkes and Sons’ Rolling Mills in Liverpool Street, Messrs. Elkington & Co.’s Show Rooms, in Newhall Street, the New British Iron Co.’s Works at Corngreaves, the Lower Grounds at Aston Park, and Messrs. Cadbury Bros.’ Cocoa Manufactory, near Birmingham, the latter being only very recently started upon the Gulcher system.
The incandescent or glow electric lamp, first made its appearance upon a large scale in Birmingham, in the year 1882, when the Birmingham Town Hall was successfully illuminated for the Triennial Musical Festival, by Messrs. R. W. Winfield and Co., who had allied themselves with Messrs. R. E. Crompton and Co., of Chelmsford, for electric lighting undertakings. This installation was established under the writer’s superintendence, and consisted of 440 Swan glow lamps, suspended from ornamental pendants placed around the walls of the Hall, a chamber having very nearly the proportions of a double cube, and measuring 165ft. × 65ft. × 65ft. high. Various lamps in other rooms raised the number to 500. Cables were laid underneath the streets, for a distance of about a quarter of a mile, to the works of Messrs. Winfield and Co., in Cambridge street, where nine Bürgin Dynamos, separately excited by two similar machines, were employed to generate the electricity, the motive power being the old rolling mill engine, from the flywheel of which a belt conveyed the motion to the electric machinery. This wheel, being 25ft. diameter, weighing about 25 tons, and revolving 50 times per minute, afforded a source of motion, the steadiness of which left nothing to be desired. The marked difference of temperature in the Town Hall during the evening performances, as compared with the previous use of gas—70° at the ceiling instead of 110°—was fully appreciated by the large audiences of that festival. Subsequently the number of lamps was increased to upwards of 600, by the addition of two pendants. The same means of illumination were used for the 1885 Triennial Festival, as well as on many occasions of concerts, etc. The whole plant still remains the property of Messrs. Winfield and Co. Upon somewhat similar lines the same firm fitted up the Leeds Town Hall, for the Festival of 1883, where, however, the whole of the light was derived from pendants suspended from the ceiling by steel wire ropes. The machinery in this case was also situated about a quarter of a mile from the Town Hall.
In the year 1882, Messrs. Elwell, Parker, and Co., commenced electrical business in Wolverhampton, with secondary or storage batteries constructed upon a modification of the Planté method of manufacture. Shortly afterwards, the same firm began to make dynamos for charging their batteries, since which time the output has increased, and now amounts to a total of about 500 dynamos, besides several thousands of storage cells, the latter being now made under the joint Patents of the Wolverhampton Firm, and the Electrical Power Storage Co., Limited, of London. The London Stock Exchange, Lloyd’s Shipping Offices, the Manchester Art Gallery, Lord Shrewsbury’s seat at Ingestre Hall, the Lancashire and Yorkshire Railway Co., the Blackpool Electric Tramway, the Giants’ Causeway Electric Tramway, the Cannock Chase Colliery, the Grosvenor Gallery and many other establishments are lighted or worked by means of dynamos manufactured by the Wolverhampton firm.
Amongst installations set up in Birmingham under the writer’s superintendence may be mentioned the Theatre Royal, in New Street, and the Prince of Wales Theatre, in Broad Street, in each of which the plant consists of a 16-H.P. Otto silent gas engine, driving a 300 light Ferranti alternate current dynamo with a Siemen’s exciter, and with appliances at the prompt side for lowering or turning out the light at will. 200 lights are run very brightly with an expenditure of about 800 cubic feet of gas per hour. A similar number of ordinary gas burners would require from 1,000 to 1,200 cubic feet of gas per hour. The Birmingham Liberal Club, in Congreve Street, another example, has 160 lamps which are worked from a 10-unit compound dynamo, made by Messrs. Crompton and Co., of Chelmsford, the motive power being a 12-H.P. compound steam engine, by Messrs. Marshall, Sons, and Co., Limited, of Gainsborough. This machine is an excellent specimen of a self-regulating dynamo, the commutator not having been touched with anything coarser than well-worn emery cloth since February last, its surface presenting a highly-polished appearance. No storage cells are used, the lighting being derived directly from the machine.
In the suburbs, the house of Mr. Mitchell, Hagley Road, Edgbaston, has about 40 lights, and is worked from a 2-H.P. Otto silent gas engine, and a 2-unit Crompton shunt-wound dynamo, charging 24 storage cells of the E.P.S. (Electrical Power Storage Co.’s) type.
The writer’s house, 7, Clarendon Road, Edgbaston, is also electrically lighted by 24 E.P.S. cells, charged by a 30-light Chamberlain & Hookham dynamo, worked from a ½-H.P. Otto gas engine.
Messrs. Chamberlain & Hookham began, a few years ago, the manufacture of dynamos having permanent steel magnets, but they subsequently adopted the more usual type of electro-magnetic machines. Particulars are not to hand of this firm’s work, but the residences of Messrs. Walter Chamberlain and Herbert Chamberlain are amongst the examples of domestic electric lighting carried out by the firm, whose attention, however, has been directed principally to the manufacture of dynamos for electro-depositing purposes, where very heavy currents of low electro-motive force are required.
The public supply of electricity was in 1882-3 the subject of much attention on the part of Messrs. Winfield & Crompton, under whose auspices the Incandescent Electric Lighting Co. Ld. was registered. An Act of Parliament was obtained, and plans and estimates were made by the writer for lighting a large district in Birmingham from central stations. Carefully collected statistics of the gas consumption in the proposed district afforded some interesting information, such as, for instance, that the average cost of gas per burner per annum, called the burner earnings, varied from 2d. to 43/6 per burner per annum, and showed a mean earning for the whole district of 10/2 per burner per annum, the average price of gas being about 2/3 per 1,000 cubic feet. From various causes, chief amongst them being the adverse restrictions of the Electric Lighting Act of 1882, the operations of the Company have remained in abeyance. The Birmingham Act is, however, still in force, and should the efforts which are now being made for the removal or substantial modification of the obnoxious clauses of the Act meet with the desired success, Birmingham may yet enjoy the advantages of a public supply of electric light, the luxury of which only those who have lived in an electrically lighted house can fully appreciate.
Flint Glass Manufacture of Birmingham.—[A. C. Osler.]—(B. 526.) Further inventions have been made with regard to furnaces. Frisby’s patent, the fuel inserted from below, instead of being thrown on the top of the fire, has met with some amount of favour, having been adopted by several Stourbridge houses. Bœtius’s patent, by which the earlier stages of combustion take place below the floor of the furnace, and a current of heated air is supplied to complete the combustion as the inflammable gases pass through an opening in its floor into the furnace itself, has now been in use at Messrs. Osler’s for many years.