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Aviation History
1915
1915 - 0920.PDF
SUPPLEMENT TO 1/ycHi weight altimeters, which have acquired great popularity on account of their qualities of accuracy and lightness. The range of instru ments practically covers every conceivable requirement, and the sketches show but one or two which are in the greatest demand. They are sold in several styles—for screwing on to the dashboard, for wearing on the wrist, and for carrying in the pocket or in a leather sling case, the last-mentioned being specially suitable for observers. All of them are distinguished by their lightness, the cases being made of aluminium, and in most styles they can be had with the figures treated with luminous radium, so as to be readable at night. One model, known as the standard aeroplane model, is made to the Government Mark IVA specification, and it can be had either with the usual white dial and with black figures, or a black dial with white luminous figures ; the advantage of this is that it is clearly readable by day or night, and it has the advantage for day that it prevents any reflection of the sun's rays. Another instrument which is finding a good deal of favour with flying officers and others is a combined watch and compass for weariDg on the wrist. The compass is mounted in the cover of the watch, and both the dial of the compass and that of the watch, together with the pointer and hands, are treated with luminous radium. Flying officers and those who wish to make a present to a friend in the flying service will also be interested in the G.A.C. goggles, which are beautifully made to comfortably fit the face, the edges being lined with best quality plush while the eyepieces are made of Triplex glass, thus avoiding the danger of splintered glass in case of an accident. The demand for G.A.C. aero wheels con tinues to be greater than ever, and an exten sive plant has been installed at the new works for the building of them in greatly increased quantities. One of the standard 24 ins. by 3 ins. wheels was recently subjected to break ing strains, and was found to withstand a load of 3 tons before the spokes began to give. G.A.C. tyres, which are specially manufactured by Messrs. Spencer, Moulton & Co., of London and Bradford, can be obtained in all the usual sizes either in the beaded edge or wired-on patterns, the latter being standard on all Farroan machines. G.A.C. inner tubes are made in two thick nesses, light and heavy, and strength for gauge are guaranteed unbeatable. Our readers may be interested to learn that the G.A.C. can offer early deliveiies of B.E. strainers. On account of the congested state of the carriers at the present time the firm have found it necessary, in order to meet the pressing demands from some of their clients, to convert their Chenard-Walcker touring car into a lorry and it is rendering yeoman service, having already a good many thousands of miles to its credit and with some very good loads too. The General Electric Co., Ltd. 67, QUEEN VICTORIA STREET, E.C. WITH their long experience, the General Electric Co. are in a position to carry out the complete electrification, electric lighting, and steam heating of factories of all descrip tions. Different kinds of drive are desirable in different cases, though in a great many cases individual drive, i.e., a special electric motor for each machine tool, is desirable on account of the niceties of control possible and the economy of running, as the motor is only working when the tool is in use. In some cases, however, it is better to adopt group driving, i.e., to run machines from short lengths of shafting driven by electric motors. The switchgear necessary for the control of electric power in factories must be of special construction to withstand the rough usage generally meted out to such gear, and certain rules and regulations issued by the Home Office have to be followed. The G.E.C. has specialised in this work, and can NOVEMBER 19, 1915. General Electric Co. supply combined steam heaters and electric propeller fans, two types being furnished, one low pressure and one high pressure. Both have a capacity of 2,600 cub. ft. of air per min. raised through 60° F. The General Electric Co. also make a speciality of ventilating installations, par ticularly for shops where doping is carried Two examples of G.E.C. electric power installations.—Above, an individual motor driving- a breast drill ; below, a Witton motor driving- a band saw saw-sharpener, grinder, and spindle machine. deal with any case which may arise whether it be for motor starters and controllers, main switches, sub-switches for lighting or power, circuit breakers and fuses, &c, as well as for complete equipments. Mention should be made of the bench drills, breast drills, grinders, &c, supplied by the G.E.C. The adequate lighting of factories is a matter of great importance, and here the skilled assistance of the G.E.C. Illuminating Engineering Department will be found of service—this department having been formed some years ago to take up scientifically the question of lighting in all its aspects. No hard and fast rule can be drawn up, but the G.E.C. " Dalite" system can be adapted to any case, as direct, indirect, and semi- indirect lighting units are used according to circumstances, special units for factory use being available. The lamps used are Osram drawn wire lamps or Osram Atmos type lamps. These lamps are made at the Osram- Robertson Lamp Works, Hammersmith, London. Where small candlepower units are required Osram drawn wire lamps are considered to be the best, but where larger units are desirable Osram Atmos type lamps will be found to meet all requirements—a white light approximating to daylight being obtained. For purposes ot factory heating, the J. Gliksten and Son, Ltd., CARPENTERS ROAD, STRATFORD, LONDON, E. WITH a view to meeting the varied needs of aircraft manufacturers this firm hold extensive stocks of the woods mostly used in the manufacture of aeroplanes and pro pellers, including silver spruce, mahogany and walnut. 211, William Gschwind and Co., DEANSGATE, MANCHESTER. THIS firm, who are contractors to the British, French and Russian governments, make a speciality of high grade fine cotton fabrics suitable for the envelopes of balloons and airships as well as for the wing covering of aeroplanes. The Hasler Telegraph Works, 26, VICTORIA STREET, WESTMINSTER, LONDON, S.W. THE "Tel" aero-engine-revolution indicators which are now very extensively used by practically all the Allied Govern ments, are constructed on the same principle as the speed indicators and recorders made by the Hasler Telegraph Works for many years past, specially for use on locomotives, tramcars, and automobiles. These instru ments have a mechanical action which differs entirely from the centrifugal or magnetic systems. The primary feature of the " Tel " 12
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