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Tools for the Workshops

Tools for the Workshops Workshop and Production Section AIRCRAF T ENGINEERING April, 1941 Details of Some Practical Machines for Various Duties Paraffin Washing Equipment Fo r many years it has been customary to use paraffin oil to clean machine parts in engineering workshops but, generally speaking, this process has been very messy owing to th e improvised nature of th e cleaning plant, while the disposal of dirty paraffin oil has always been a great problem. The De Laval Parawash Equipment, which has been developed specially for the aircraft and other engineering industries for the cleaning of parts after manufacture or stripping and before passing to stores or assembly, has been designed to over­ come these disadvantages. Th e apparatus is shown in Fig. 3. The parts to be cleaned are placed on a perforated plate and washing is effected by means of a pistol-type spray gun with a trigger-operated valve. The paraffin oil drains through the perforated plate into the botto m hopper and through a strainer into the left-hand compartment of the paraffin supply tank. I n this compartment some degree of settling is effected and the paraffin flows over a weir into the right-han d compartment of the tank. A De Laval Centrifugal Clarifier is coupled up to this tank, and th e paraffin is continuously pumped to the Clarifier, purified and returned to the tank. This clean paraffin is taken directly from the tank through a The Lo-Load Lifting Truck high-pressure centrifugal pump to the spray gun. A relief valve is incorporated on the discharge A new lifting truck for the workshop has been put side of the pressure pum p so tha t in th e event of the on the market by E. H. Jones (Machine Tools) Ltd. spra y gun being shut off there will be no excess We understand that the decision to manufacture this truck was the result of using similar trucks for pressure built up, and the paraffin from this by-pass many years in the Company's own showrooms and or relief circuit is returned to the right-hand com­ workshops. partmen t of the tank. The truck has two unusual features, the most im­ The outstanding feature of this unit is tha t the portant of which is th e fact tha t the platform can be paraffin is continuously cleaned by means of the brought down to within 1½ in. of floor level so that De Laval Centrifuge whereby impurities are never practically any load can be rolled on t o it and lifting allowed to accumulate in the paraffin. It will be tackle becomes unnecessary. The other feature is readily appreciated that a paraffin spray system the manoeuvrability secured by mounting the two which does not incorporate such a highly efficient rear wheels on castors and providing a very power­ form of paraffin purification cannot be satisfactory, ful handle which can be used in any position from since, although the paraffin may be clean when almost horizontal to vertical. Even with a full first pu t to use, it gradually becomes contaminated load the truck can easily be turned in its own length. t o such an extent tha t as much dirt can be pu t back In the makers' own workshops these trucks have, b y the paraffin being used as was present before of course, been used mainly for quick handling of washing. machine tools, but the truck would also be found extremely useful in production shops and toolrooms Th e De Laval Parawash Unit is self-contained in for the transport of heavy parts. all respects, and can be readily transported from To provide against accidental lowering of the one location to another if required. A large truck platform while loads are being transported, numbe r has already been supplied to leading the foot lever is interlocked with th e handle so tha t aircraft manufacturers and other engineering con­ movement of the platform is possible only when cerns, and it may be confidently stated that this the foot lever is used in conjunction with th e handle. equipmen t meets the long-felt need of the industry Solid rubber tyres are fitted to th e wheels. for a simple and efficient paraffin cleaning plant. As far as the specification of the truck is con­ cerned, it is noted that the maximum lifting load Full particulars can be obtained from the Alfa- recommended is 15 cwt. and the inside area of the Lava l Co. Ltd., of Great West Road, Brentford, platform is 41 in. by 26 in. Middlesex. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Tools for the Workshops

Aircraft Engineering and Aerospace Technology , Volume 13 (4): 1 – Apr 1, 1941
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb030763
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Abstract

Workshop and Production Section AIRCRAF T ENGINEERING April, 1941 Details of Some Practical Machines for Various Duties Paraffin Washing Equipment Fo r many years it has been customary to use paraffin oil to clean machine parts in engineering workshops but, generally speaking, this process has been very messy owing to th e improvised nature of th e cleaning plant, while the disposal of dirty paraffin oil has always been a great problem. The De Laval Parawash Equipment, which has been developed specially for the aircraft and other engineering industries for the cleaning of parts after manufacture or stripping and before passing to stores or assembly, has been designed to over­ come these disadvantages. Th e apparatus is shown in Fig. 3. The parts to be cleaned are placed on a perforated plate and washing is effected by means of a pistol-type spray gun with a trigger-operated valve. The paraffin oil drains through the perforated plate into the botto m hopper and through a strainer into the left-hand compartment of the paraffin supply tank. I n this compartment some degree of settling is effected and the paraffin flows over a weir into the right-han d compartment of the tank. A De Laval Centrifugal Clarifier is coupled up to this tank, and th e paraffin is continuously pumped to the Clarifier, purified and returned to the tank. This clean paraffin is taken directly from the tank through a The Lo-Load Lifting Truck high-pressure centrifugal pump to the spray gun. A relief valve is incorporated on the discharge A new lifting truck for the workshop has been put side of the pressure pum p so tha t in th e event of the on the market by E. H. Jones (Machine Tools) Ltd. spra y gun being shut off there will be no excess We understand that the decision to manufacture this truck was the result of using similar trucks for pressure built up, and the paraffin from this by-pass many years in the Company's own showrooms and or relief circuit is returned to the right-hand com­ workshops. partmen t of the tank. The truck has two unusual features, the most im­ The outstanding feature of this unit is tha t the portant of which is th e fact tha t the platform can be paraffin is continuously cleaned by means of the brought down to within 1½ in. of floor level so that De Laval Centrifuge whereby impurities are never practically any load can be rolled on t o it and lifting allowed to accumulate in the paraffin. It will be tackle becomes unnecessary. The other feature is readily appreciated that a paraffin spray system the manoeuvrability secured by mounting the two which does not incorporate such a highly efficient rear wheels on castors and providing a very power­ form of paraffin purification cannot be satisfactory, ful handle which can be used in any position from since, although the paraffin may be clean when almost horizontal to vertical. Even with a full first pu t to use, it gradually becomes contaminated load the truck can easily be turned in its own length. t o such an extent tha t as much dirt can be pu t back In the makers' own workshops these trucks have, b y the paraffin being used as was present before of course, been used mainly for quick handling of washing. machine tools, but the truck would also be found extremely useful in production shops and toolrooms Th e De Laval Parawash Unit is self-contained in for the transport of heavy parts. all respects, and can be readily transported from To provide against accidental lowering of the one location to another if required. A large truck platform while loads are being transported, numbe r has already been supplied to leading the foot lever is interlocked with th e handle so tha t aircraft manufacturers and other engineering con­ movement of the platform is possible only when cerns, and it may be confidently stated that this the foot lever is used in conjunction with th e handle. equipmen t meets the long-felt need of the industry Solid rubber tyres are fitted to th e wheels. for a simple and efficient paraffin cleaning plant. As far as the specification of the truck is con­ cerned, it is noted that the maximum lifting load Full particulars can be obtained from the Alfa- recommended is 15 cwt. and the inside area of the Lava l Co. Ltd., of Great West Road, Brentford, platform is 41 in. by 26 in. Middlesex.

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Apr 1, 1941

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