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Tools for the Workshop

Tools for the Workshop A Selection of Notes on Recent Equipment and New and Well-tried Methods and Materials The Planet Electric Chain Blocks (Fig. 1) The Planet electric chain blocks are very compact, robust and, being light in weight, are very portable, one man being able to place them in position by himself. The blocks are manufactured in three sizes as under. 5 cwt. load. 10 ft. lift at 20 ft./min. 1 ft. 1 in. headroom, 75 lb. weight. 10 cwt. load. 10 ft. lift at 10 ft./min. 1 ft. 1 in. head­ room. 75 lb. weight. 1 ton load. 10 ft. lift at 5 ft./min. 1 ft. 6 in. headroom. and this in turn prolongs heating element life and 90 lb. weight. saves oxidization of the copper bits. The blocks are small and strong, and it will be seen Wolf solderguns can be supplied for the following from the above that the weight of these blocks is very voltages: 24, 50, 100/110, 115/130, 200/220, 225/250. low, and that the headroom (the distance from the Each gun is fitted with six feet of 3-corc cable. Models bottom hook to the top hook when in the fully raised are available for a wide range of purposes from fine position) is also very small. instrument to heavy duty work. Full details are ob­ The standard units are suitable for working on any tainable from Wolf Electric Tools Ltd, Pioneer standard voltage of three-phase, single-phase, or Works, Hanger Lane, London, W.5. D.C. supply as required. The motor is switched on by a drum-type controller, fitted on the blocks, and operated by pendant chains. The electrical equipment Ground Power Unit for Starting and Servicing (Fig. 4) is so arranged that phasing of the units is unnecessary A special feature of the new Murex ground power and the blocks can be plugged into any electricity unit is that it has an engine-driven generator which supply points. A clutch is fitted to the motor drive supplies a high electrical current continuously at con­ pulley, obviating the use of limit switches, and serving stant voltage for aircraft servicing and pre-flight as a complete protection against motor overloads. checks and a very high peak starting current for all When leaving the works the clutches are set to the types of aircraft engines, including turbo-jet and turbo­ required amount to release below the full load torque prop types. of the motor, so they do not again require attention The unit has been regularly used to start the de throughout the entire life of the friction facings. Havilland Comet ever since its first flight and was also jig with a frame in position ready for welding. In a A mechanical brake is fitted to the blocks operating used to start other modern types, including the Vickers few minutes the jig can be reset, and it can be rotated from a bowden cable fitted to the controller, the Viscount, the Armstrong Whitworth Apollo and the through 360 deg. and locked in any position ready for brakes being automatically released when the motor is Handley Page Hermes IV at the S.B.A.C. Flying welding. switched on in the upward or downward motions. Display. An illustrated leaflet describing this jig and also The brakes, being fitted on the driven pulley, will Recently a highly successful test with the unit was two types of vice bracket can be obtained from sustain and hold the load at any point. made on a Boeing Stratocruiser at London Airport. Donald Ross & Partners Ltd., 1-3 Arlington Road, Full particulars of these useful blocks can be had As the electrical requirements of this aircraft were London, N.W.I. on application to the manufacturers; The Palladium known to be heavy, two Murex units were first Eng. Co. Ltd., Avonmouth, Bristol. coupled in parallel for the test. After a routine pre- Wolf Electric Solder Guns (Fig. 3) flight check had been made and the engines started A New Frame Welding Jig (Fig. 2) by the units, it was found that one unit had ample A new introduction by Wolf Electric Tools Ltd. capacity to provide the electrical current required. The importance of holding and positioning equip­ is a range of electric solder guns which they claim will ment cannot be over-emphasized in welding and it is, overcome hitherto common criticism of this type of One of the main advantages of the Murex ground therefore, of interest to learn that Donald Ross & equipment. power unit is that it not only caters for piston engined Partners, who specialize in the design and manufac­ Industrial soldering requirements have long called aircraft at present in regular service, but it also has the ture of this equipment, have now produced a new type for soldering tools which will reach operating tem­ capacity to deal with the jet airliners of the future. frame jig with almost universal uses. perature quickly, will maintain a correct constant Another important advantage is that it eliminates the With the 'Twinner' frame jig it is possible to set-up heat, prove economical in current consumption and use of expensive heavy service accumulators. hundreds of different welding jobs of any angular are 'easy in the hand' for long production periods. The standard Murex unit operates at 28·5 volts and shape, square or rectangle, with inserts, if desired, The illustrations picture two irons from their range supplies a current of 600 amperes continuously for up to 8 ft. long by 4 ft. wide. The use of this jig en­ servicing and pre-flight checks and a peak starting of six hand models and particular attention is directed sures accuracy of size and, more important, prevents current of approximately 1,200 amperes for engine to the off-straight hand grip which lends to much more jobs being welded out of square. The preparatory starting periods. Other units are built to operate at comfortable control. By ingenious arrangement costs of jig designing are, of course, obviated and within the heating element, the heat is localized around 125 volts and in various capacities. The unit is mounted setting-up time is saved. The vice brackets which the copper bit and with the elimination of wasted on a special low trailer which enables it to pass form part of the jig will hold any section material heat areas, considerable economy in current con­ under the wings and fuselage of all large aircraft. up to 2 in. thick, and are readily arranged at any dis­ sumption has been effected. At the same time ten­ Further particulars are available from Murex tance apart. The photograph shows the 'Twinner' dency towards excessive temperature rise is avoided Welding Processes Ltd., Waltham Cross, Herts. April 1950 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Tools for the Workshop

Aircraft Engineering and Aerospace Technology , Volume 22 (4): 1 – Apr 1, 1950

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb031892
Publisher site
See Article on Publisher Site

Abstract

A Selection of Notes on Recent Equipment and New and Well-tried Methods and Materials The Planet Electric Chain Blocks (Fig. 1) The Planet electric chain blocks are very compact, robust and, being light in weight, are very portable, one man being able to place them in position by himself. The blocks are manufactured in three sizes as under. 5 cwt. load. 10 ft. lift at 20 ft./min. 1 ft. 1 in. headroom, 75 lb. weight. 10 cwt. load. 10 ft. lift at 10 ft./min. 1 ft. 1 in. head­ room. 75 lb. weight. 1 ton load. 10 ft. lift at 5 ft./min. 1 ft. 6 in. headroom. and this in turn prolongs heating element life and 90 lb. weight. saves oxidization of the copper bits. The blocks are small and strong, and it will be seen Wolf solderguns can be supplied for the following from the above that the weight of these blocks is very voltages: 24, 50, 100/110, 115/130, 200/220, 225/250. low, and that the headroom (the distance from the Each gun is fitted with six feet of 3-corc cable. Models bottom hook to the top hook when in the fully raised are available for a wide range of purposes from fine position) is also very small. instrument to heavy duty work. Full details are ob­ The standard units are suitable for working on any tainable from Wolf Electric Tools Ltd, Pioneer standard voltage of three-phase, single-phase, or Works, Hanger Lane, London, W.5. D.C. supply as required. The motor is switched on by a drum-type controller, fitted on the blocks, and operated by pendant chains. The electrical equipment Ground Power Unit for Starting and Servicing (Fig. 4) is so arranged that phasing of the units is unnecessary A special feature of the new Murex ground power and the blocks can be plugged into any electricity unit is that it has an engine-driven generator which supply points. A clutch is fitted to the motor drive supplies a high electrical current continuously at con­ pulley, obviating the use of limit switches, and serving stant voltage for aircraft servicing and pre-flight as a complete protection against motor overloads. checks and a very high peak starting current for all When leaving the works the clutches are set to the types of aircraft engines, including turbo-jet and turbo­ required amount to release below the full load torque prop types. of the motor, so they do not again require attention The unit has been regularly used to start the de throughout the entire life of the friction facings. Havilland Comet ever since its first flight and was also jig with a frame in position ready for welding. In a A mechanical brake is fitted to the blocks operating used to start other modern types, including the Vickers few minutes the jig can be reset, and it can be rotated from a bowden cable fitted to the controller, the Viscount, the Armstrong Whitworth Apollo and the through 360 deg. and locked in any position ready for brakes being automatically released when the motor is Handley Page Hermes IV at the S.B.A.C. Flying welding. switched on in the upward or downward motions. Display. An illustrated leaflet describing this jig and also The brakes, being fitted on the driven pulley, will Recently a highly successful test with the unit was two types of vice bracket can be obtained from sustain and hold the load at any point. made on a Boeing Stratocruiser at London Airport. Donald Ross & Partners Ltd., 1-3 Arlington Road, Full particulars of these useful blocks can be had As the electrical requirements of this aircraft were London, N.W.I. on application to the manufacturers; The Palladium known to be heavy, two Murex units were first Eng. Co. Ltd., Avonmouth, Bristol. coupled in parallel for the test. After a routine pre- Wolf Electric Solder Guns (Fig. 3) flight check had been made and the engines started A New Frame Welding Jig (Fig. 2) by the units, it was found that one unit had ample A new introduction by Wolf Electric Tools Ltd. capacity to provide the electrical current required. The importance of holding and positioning equip­ is a range of electric solder guns which they claim will ment cannot be over-emphasized in welding and it is, overcome hitherto common criticism of this type of One of the main advantages of the Murex ground therefore, of interest to learn that Donald Ross & equipment. power unit is that it not only caters for piston engined Partners, who specialize in the design and manufac­ Industrial soldering requirements have long called aircraft at present in regular service, but it also has the ture of this equipment, have now produced a new type for soldering tools which will reach operating tem­ capacity to deal with the jet airliners of the future. frame jig with almost universal uses. perature quickly, will maintain a correct constant Another important advantage is that it eliminates the With the 'Twinner' frame jig it is possible to set-up heat, prove economical in current consumption and use of expensive heavy service accumulators. hundreds of different welding jobs of any angular are 'easy in the hand' for long production periods. The standard Murex unit operates at 28·5 volts and shape, square or rectangle, with inserts, if desired, The illustrations picture two irons from their range supplies a current of 600 amperes continuously for up to 8 ft. long by 4 ft. wide. The use of this jig en­ servicing and pre-flight checks and a peak starting of six hand models and particular attention is directed sures accuracy of size and, more important, prevents current of approximately 1,200 amperes for engine to the off-straight hand grip which lends to much more jobs being welded out of square. The preparatory starting periods. Other units are built to operate at comfortable control. By ingenious arrangement costs of jig designing are, of course, obviated and within the heating element, the heat is localized around 125 volts and in various capacities. The unit is mounted setting-up time is saved. The vice brackets which the copper bit and with the elimination of wasted on a special low trailer which enables it to pass form part of the jig will hold any section material heat areas, considerable economy in current con­ under the wings and fuselage of all large aircraft. up to 2 in. thick, and are readily arranged at any dis­ sumption has been effected. At the same time ten­ Further particulars are available from Murex tance apart. The photograph shows the 'Twinner' dency towards excessive temperature rise is avoided Welding Processes Ltd., Waltham Cross, Herts. April 1950

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Apr 1, 1950

There are no references for this article.