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Aviation History
1920
1920 - 0984.PDF
SEPTEMBER 9, 1920 SPRAY PAINTING THERE are few branches of any industry where labour-savingmethods cannot be employed in one way or another, and whatever the work in hand, every process or stage should beexamined with a view to introducing such-methods wherever possible. It is remarkable how many opportunities are over-looked in this respect, as, for example, various kinds 'of paiat work—i.e., the application of protective materials towood, metal, cement work, etc. No dcrabt the latter is con- sidered by some to be such a simple process in itself as tobe not of sufficient importance to. warrant the introduction of labour-saving methods. As a matter of fact, paintwork isnot such a simple matter as one would at first suppose—a slight suspicion of which was manifest when the writer under-took to paint the common-or-garden domestic bath ! We were, however, considerably surprised, when visiting theworks of the Air Brush Manufacturing Co., Ltd., of Arlington Street, London, E.C. 1, who are specialists in spray painting," to discover that painting is a science in itself, with a hundred and one items on which the success or failure of a job depends.It is in the consideration of and attention to these items where the Air Brush Co. makes good, for the scientific theory ofpainting and all appertaining thereto has been investigated thoroughly in the course of developing the various instru-ments and plants turned out by this firm. It is not a bit of good introducing labour-saving methods unless they do theirjob practically and efficiently, as well as save labour ; far better employ the ordinary methods, and do the workthoroughly. Practically all classes of painting and decorating may bedone by spraying, from fine line black and white or water- colour drawings to large heavy work using enamels or thickvarnishes. Aeroplane fabric can_ also be doped by this pro- cess. . The Air Brush Manufacturing Co. supply a large varietyof instruments and accessories, covering all these classes of work. In each case the general principle is the same—airis compressed into a tank, from which it is led through suit- able piping to a pressure-regulating valve, and thence to theair " brush." On the operation of a.trigger, the air finally issues from the nozzle of the brush, drawing with it the paintin the form of a fine spray. The paint is fed to the brush by gravity from a container either mounted on the brush itselfor from a larger container mounted conveniently near-by, and connected to the brush by a length of flexible tubing. Thepaint may also be pressure-fed, in which case a supply of compressed air is led, through a regulating-valve, into anair-tight paint-contaiper, the paint being forced out at the base ni% a pressure regulator, and led to the brush throughflexible tubing. As previously stated, there are several models of thesespraying plants to suit various kinds of work, but space will no't permit a description of these. We give, however, illus-trations of one of the " Nimbus " air brushes, a handy partable plant, and a diagram showing the general lay-out ofa complete " Nimbus " spraying installation. The " Nimbus " Portable Combination Painting'outfit. Compressed air from the compressor enters at (1), and passes through a clarifier (6), vii a pressure regula- ting valve (2), to the "Air-Brush." Air is also similarly led via (2A) and (6A), to the paint container (7), thus forcing the paint through the connection (4) to the "Brush." (3) and (3A) are safety valves, and (5) is a release cock for the paint container The "Nimbus" Paint SprayingPistol, or "Air-Brush," and on the right diagram showing the lay-out of a complete " Nimbus " Paint Spraying installation 986
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