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Aviation History
1922
1922 - 0751.PDF
DECEMBER 14; 1922, Road, London, E. R. Calthrop's Aerial Patents Ltd. ' 423A, Edgware W. 2. THERE is very little one can say here as regards this firm other than the fact that the " Guardian Angel " parachute is undoubtedly an exceed- and d.y „„•„,"IS'^ZTXfi*' demands to for meet dope, the and ever-growing also for the The Calthrop Type H " Guardian Angel " Parachute. ingly well-designed and thoroughly thought-out proposition, and that it has demonstrated by innumerable " nights," that it is as reliable an apparatus as it is humanly possible to obtain. Mr. Calthrop has been at work—and worked hard—on the development of the parachute for a good many years now, and it should not be long now before the aviation world will wake up to the fact that there is in the " Guardian Angel " a very important and useful " accessory " for aircraft. Cellon (Richmond), Ltd., 22, Cork Street, London, W. 1. THE first Cellon dope manufactured in this country was made in a small works at Clapham, the manufacture of the material starting at the beginning, of 1911. Although at that time there was not a large demand for dope, the requirements soon outgrew the facili ties available at Clapham, and in the following year arrangements were made with Messrs. Thomas Tyrer and Co., chemical manufacturers, at Strat ford, to manufacture the dope on behalf of the Cellon Company. In the year 1912 every important competition held in this country was won by machines doped with " Cellon," and large orders were executed for the War Office and the Admiralty. At the end of 1913 the concern was turned to a Limited Company under the name of Cellon, Ltd., but Messrs. Tyrer still continued to manufacture for the new company. During the early part of the War, the plant at Stratford was newly introduced dope coverings. In 1916 it was realised that it was impos sible to further increase the output of etc., etc., and are generally acknow ledged to be the most complete of their kind in this or any other of the Allied countries, and many foreign Commis sions visited them during the War. Some of these Commissions, too, asked for and were allowed access to plans of the works, afterwards erecting plant on similar lines in their own countries. In 1918, Cellon (Richmond), Ltd., the present company, was formed to take over the works. Naturally, the termi nation of hostilities considerably re duced the quantity of dope required in this country, but, on the other hand, the export of dope was again permitted, and there was an immediate demand from the principal foreign Govern ments for Cellon materials. This demand has grown considerably, and still continues. With the slackening demand for dope, the Research Depart ment of the works were able to devote more time for experiments on other uses and properties of cellulose solu tions, with a result that a number of these have been introduced, and are at present being manufactured in large quantities. The chief amongst these are the " Cerrie " black lacquers, which are made in all grades to give from a dead matt to a highly glossy finish. These, like all the " Cerric " materials, are rapidly applied by means of spray, and dry very rapidly. They arc now being used in a large number of works to replace stoving enamel. Other " Cerric " materials include transparent lacquers, wood solutions, coloured solutions for decorating tins, boxes, furniture, etc., and bronzing medium. Another speciality of the firm is " Porcelac" white solution, which is used very largely for the covering of bathroom and hospital fittings, bath taps, etc. Although considerable experiments have been carried out on the " Cerric " materials, experimental work on dopes has not A part of the Stores Section of the Cellon Works at Richmond. dopes and dope coverings, with the result that extensive works were taken at Richmond, Surrey. The works themselves comprise large mixing rooms, storage houses, laboratories, been overlooked, and Cellon Scheme " B " pigmented dope is claimed to be the most economical and efficient scheme of doping obtainable. Con tinual improvements have been made
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