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TRADE PUBLICATIONS RECEIVED Fabrication Instructions No. 1, Veneering Warerite Plastics Copies of the following specifications may be obtained from the BRITISH STANDARDS [Warerite Ltd., 18 Grosvenor Gardens, S.W.1] Westool A.C. Solenoids Series 100 INSTITUTION , Sales Department, 24 Victoria Street, London, S.W.1 , at the prices indicated Westool D.C. Solenoids Series 'C' [Westool Ltd., St Helen's Auckland, Co. Durham] Hymatic Servicing Instruction B.S.NO.G.128: 1950.—Crossed Pointer Indicators for tension stress-strain, tension set, compression stress- [The Hymatic Engineering Co. Ltd., Redditch, Use with Instrument Landing System Receivers for strain, compression set, hardness, durometer indenta Worcs.] Aircraft Purposes. tion, creep and stress relaxation, rebound resilience, A Booklet about Stationery and Equipment for Machine resistance to low temperature, abrasion resistance, This standard cover crossed pointer indicators Accounting tear strength, resistance to flex-cracking and cut- used to indicate departure of an aircraft from the [Kenrick & Jefferson Ltd., West Bromwich, Staffs] growth, swelling in liquids, equilibrium water vapour tracks of an instrument landing system in azimuth absorption, permeability and porosity to gases, perme and elevation. The instrument incorporates monitor Besco Guillotine Shearing Machines, Models 96-10, ability to liquids, ply separation (adhesion), electric ing devices to indicate when satisfactory potentials 36 x 20 and 48 x 16 strength, surface and volume resistivity, permittivity are being supplied to it. Besco Plate Bending Rolls and power factor, and for ebonite, the following: Price 1s. post free. Besco Bar Cropping Machines Cross-breaking strength, impact strength, plastic Besco Circling Shear yield, compression strength, linear coefficient of Besco Inclinable Power Press B.S. NO.G.129: 1950.—Extra-low Voltage Switches thermal expansion. Methods for preparation of sample Besco All-Steel Folding Machines (hand-operated) for Aircraft. and conditioning of test pieces arc included. Besco Slip Roll Hand Gear Bending Roller Price 21s. B.S. NO.G.130: 1950.—Battery cut-outs (reverse cur Besco Punching, Shearing, Section Cropping Machine rent relays) for Aircraft. Besco Universal Combination Rotary Machine G.129 applies to switches for use in a nominal 24- B.S. 1224: 1945.—Electroplated Coatings of Nickel [F. J. Edwards Ltd., 359-361 Euston Road, N.W.1] volt D.C. systems. and Chromium on Steel and Brass. Continuous Conveyor Furnaces G.130 covers two basic types of extra-low voltage In view of the shortage of nickel which has devel [Birlee Ltd., Erdington, Birmingham, 24] D.C. reverse current relays: the shunt voltage sensi oped recently, a special meeting of Committees of the tive type and the differential voltage sensitive type. Drying Ovens British Standards Institution concerned with the Price 1s. each post free. Supersaw preparation of Standards relating to electroplated Universal Marking Machines coatings of nickel, was held in order to determine B.S. 870: 1950. External Micrometers. Pneumatic Presses for Blocking Plastics what steps should be taken. [Funditor Ltd., 3 Woodbridge Street, E.C.1] This British Standard for external micrometers was The meeting was unanimously of the opinion that first issued in 1939 and forms one of a series of B.S. 1224, electroplated coatings of nickel and The Dubild Universal Tool and Cutter Grinding Machine standards, published or in course of preparation, for chromium on steel and brass, the only Standard at engineers' precision tools. present published in relation to such coatings, should The Billeter Universal Engraving, Drilling and Contour The present revision represents an extension of the not be amended, but that a memorandum should be Milling Machine issued drawing attention to the provisions of the [Adam Machine Tool Co. Ltd., Acme Works, previous standard to cover micrometers of 0 to ½ in. Standard, which enable the amount of nickel used to Waverley Road, St Albans.] and from 12 in. to 24 in., with their corresponding be reduced. metric equivalents, and also provides for micrometers The Marconi' Companies at the Festival of Britain with interchangeable anvils and various measuring This memorandum has now been published, and [Marconi's Wireless Telegraph Co. Ltd., Marconi ranges up to 24 in. or 600 mm. will be inserted in all copies of B.S. 1224 sold. House, Chelmsford] The standard includes requirements for material, For the benefit of those who have already a copy of The Beaver Portable Metal Saw design of frame, micrometer screw, spindle, thimble B.S. 1224 in their possession, we repeat the wording [Tungum Sales Co. Ltd., Brandon House, Painswick and barrel, adjustments, measuring faces, accuracy, of the memorandum as follows: Road, Cheltenham] packing and marking. Requirements arc also specified In view of the present shortage of supplies of for the material, general design and accuracy of nickel, and the importance of making the most Bearing Lubrication setting gauges. Recommended methods of testing efficient use of the supplies available, attention is [C. C. Wakefield & Co. Ltd., Grosvenor Street, W. 1] micrometers arc given in an appendix. drawn to the definition of the significant surface for Self-Indicating Tensile Testing Machine Model 7*42 Price 2s. 6d. post free. plating on page 5 of this British Standard, which [Samuel Derrison & Sons Ltd., Hunslet Foundry, enables the manufacturer, by agreement with the Leeds, 10] purchaser, to reduce the surface to be coated in B.S. 903: 1950.—Methods of Testing Vulcanized Crankshaft Forging by the R.R. Continuous Grain- accordance with the standard. Rubber. flow Process Attention is also drawn to the note, on page 7, This revision provides standardized methods of relating to standard classifications: [English Steel Corporation Ltd., Sheffield, 9] analysis and tests for vulcanized rubber, both for the Ni 8S and Ni 5S Pictorial Report 1951 purpose of providing methods for use in British according to which the minimum deposit thickness [United Aircraft Corporation, 400 South Main Standards and to provide a set of reliable methods may be a composite deposit of nickel and copper, Street, East Hartford, 8, Conn., U.S.A.] for use by all those concerned with the analysis and provided that the final deposit of nickel is at least testing of vulcanized rubber. Thirty-first Annual Report 50 per cent of the whole. It is pointed out that in addition to a great number [British Non-Ferrous Metals Research Association, of tests which are now in general use having been Euston Street, N.W.1] added to the original standard, the scope of the docu Press Book: MC-4 Helicopter B.S. 1134: 1950.—Thr Assessment of Surface Texture ment has been widened to cover synthetic rubbers as Centre-line-average Height Method. [McCulloch Motors Corporation, Los Angeles, well as natural rubber. It is, however, not implied that Cal. U.S.A.] every test described is appropriate or suitable for all This Standard, which is of interest to enigneers in Versatility—The Meteor most sections of industry, refers to the measurement types of vulcanizate. of the irregularities of metal surfaces machine- It is appreciated that the standard docs not include [Gloster Aircraft Co. Ltd., Hucclecote, Glos.] finished by various methods. Although relating prim all the test procedures for which standardization is Aero Research Technical Notes arily to these surfaces the principles may be usefully desirable, because some require further investigation Bulletin No. 99. The Assembly of Radio and extended to the wider field of surfaces produced by before reliable standard techniques can be recom Television Cabinets other methods. The subject matter covers terminology, mended. In view, however, of the urgent need for a Aero Research Ltd., Duxford, Cambridge] revision of B.S. 903, to meet the demands of rubber the instruments and methods to be employed in American (3rd Angle) and British (\st Angle)Projection. manufacturers and users, it has been thought best to assessing British Standard index numbers for surface G. L. Murray defer inclusion of these still debatable procedures until texture, preferred limits for the grading of surface [Toledo Woodhead Springs Ltd., Sheffield] they have been further studied. texture by means of index numbers and the symbols to be employed in stating surface texture requirements Rubber and its Derivatives as Protection Coatings for The document has been drawn up in such a way on drawings. Metals. R. F. Reynolds that closely related methods arc grouped into a self- There arc appendices which supplement and explain [Andre Rubber Co. Ltd., Kingston By-Pass, contained document and arc given a distinctive num some of the reasons for the recommendations made in Surbiton] ber. the body of the Standard; these contain useful notes The various methods of analysis and tests covered 'Flexelite' Flexible Tank Manual, Vol. 1—General indicated by the titles; remarks on surface profiles; by the standard arc as follows: [Maiston Excelsior Ltd., Wolverhampton] the determination of C.L.A. index numbers; notes on Acetone extract, unsaponifiable matter in acetone the direction of measurement; notes on instrumenta The Golmet Auto-Liner Section Lining Device extract, paraffin wax and ceresin, chloroform extract, tion; note on the measurement of longer sampling [Golmet Ltd., Virginia Park, Caerphilly, Glam alcoholic-potash extract, total sulphur, extractable lengths; the analysis of surface texture; choice of organ] sulphur, rubber-combined sulphur, sulphur in total sampling lengths; and, finally, alternative assessments fillers, sulphide sulphur, natural rubber hydrocarbon Low Frequency Melting of Aluminium Alloys (direct determination), nitrogen (for acrylonitrile poly of surface texture. [Birlec Ltd., Tyburn Road, Erdington, Birmingham, mers), chlorine (for chloroprene polymers and copo A number of diagrams arc shown illustrative of 24] lymers), isobutene-diene (butyl rubber), thioplast various types of surface and the whole constitutes a rubbers, total fillers, ash, carbon black, antimony, useful addition to the literature on the subject as it Festival of Britain Map and Calendar copper manganese, carbonate, glue cellulose, water brings together much that has hitherto been scattered [The Eyre Smelting Co. Ltd., Tandem Works, extract. throughout various publications. The latest available Merton Abbey, S.W.19] information, hitherto unpublished, on methods of Methods for physical testing for the following arc measurement is also given. Machinery Means Business in Metal Fabrication included: [F. J. Edwards Ltd., 359-361 Euston Road, N.W.1] Accelerated ageing, density and specific gravity, Price 6s. post free. 184 Aircraft Engineering
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Jun 1, 1951
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