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Aviation History
1957
1957 - 0523.PDF
19 April 1957 525 THE INDUSTRY Pressurization-ventilated Battery A BATTERY said to be the first produced in Britain with**• "built-in ventilation" is being fitted as initial equipment on the Vickers Viscount 800 series and Vanguard aircraft, and is alsoavailable as a replacement for the Viscount 700. Known as the Dagenite 12-ECM 13-VA, it is a 24-volt battery with a capacityof 25 amp-hr, produced by Peto and Radford of 137 Victoria Street, London, S.W.I. The cell vent-plugs are not exposed but vent into a compart-ment on the top of the battery; and this compartment is con- nected to a pipe leading through the outside skin of the aircraft.Differential pressure from the aircraft air-conditioning system ensures passage of air through the compartment with consequentexpulsion of the gases via the escape pipe. Ultrasonic Cleaning Equipment VOIDER use of ultrasonic cleaning is made possible through^" standard equipment recently produced by Da we Instru- ments, Ltd., 99 Uxbridge Road, Ealing, London, W.5. TheDawe type 413 Ultrasonic generator, drawing only about 250W from the mains, provides power at 38 kc/s, which is sufficientfor transducers with a total area of 30-40 sq in. This area is ample for a standard one-gallon tank or two half-gallon tankseach having the transducer unit built into its base. Alternatively, standard fully immersible transducers (2 in by 8in by 3in high)are available to convert existing cleaning tanks. Advantages claimed for ultrasonic cleaning are that it can beused on products difficult to clean properly by conventional means; that it removes dirt without damaging surfaces; and thatentire assemblies can be cleaned without dismantling them. In addition, all existing cleaning media can be used in conjunctionwith ultrasonics. Sub-contract Versatility AN illustrated brochure has been published by Greenpar Engi-•**• neering, Ltd., East Industrial Estate, Harlow, Essex, describing the different aspects of their work as manufacturersof components and assemblies for the aircraft and other industries. The company specializes in heat-treatment techniques; but itsservices also include turning, milling, grinding and salt-bath processing (as noted in our recent description [April 5] of EdgarPercival E.P.9 production, Greenpar Engineering have under- taken machining, heat-treatment and other work in connectionwith this aircraft). There is also an electrical division which specializes in co-axial connectors. Managing director of the company is Mr. J. L. Green, whofounded it in 1945. The first products were hydraulic motor jacks and compounds for sealing up burst pipes; but later—andespecially since moving from London to Harlow in 1951—the field of activities has widened considerably. The efficiently designed new building into which, as reported in "Flight" of April 5, the B.B. Chemical Co., Ltd., have moved their administrative offices. It was opened on March 25 by Mr. C. Bennion, chairman of the British United Shoe Machinery Co., Ltd. The name "Bostik" identifies the Leicester chemical firm's principal products— sealants and adhesives. During his recent tour of the Handley Page factories, referred to in our news pages last week, Prince Philip visited the apprentice training school. He is seen here examining trainees' work and equipment in company with the education officer, Mr. H. Deacon (left) and Sir Frederick Handley Page. New Cabin Tables 'T'HE airliner passenger table illustrated on this page is one•*- manufactured by Hickman, Ltd., of North Circular Road, London, N.W.2, to the requirements of B.E.A. for installationin their Viscounts. It is made in two forms, as four-seater or six-seater units, and maximum weights are 26f lb and 36i lb. The legs fix rigidly to the floor rails by means of toggle actionclamps and fold into the centre section of the body for ease of stowage when the table is not in use. The Hickman "Pullman" table in the open position. The rim of the table leaf is formed froman aluminium extrusion with anodized finish, and the table-top is fabricatedfrom 18 s.w.g. light alloy sheet covered on both sides with Vynide. The under-side of the table is fitted with a shelf and elastic band so that when the leaf is in the vertical positionit will retain papers, periodicals and brochures. The table leaves are pivot hung to the centre section andoperate independently against friction washers which hold them in place at any angle. The legs and the end-caps are stoveenamelled in any colour to order. Tables of this type have also been supplied to Aer Lingus andIndian Airlines Corporation. Automaticity in Flaw Detection A NEW semi-automatic ultrasonic flaw-detector—claimed to be**- unique in this country and possibly in Europe—has been developed for their own use by James Booth and Co., Ltd. (ArgyleStreet, Birmingham, 7), specialists in light alloys. The apparatus is designed to scan high-strength light-alloy plates and varioustypes of extrusions, thus affording a continuous and permanent record of any fault in the materials. The detector, which is statedto provide a highly accurate cross-check on existing equipment, has been put into routine use at the company's Kins Green,Birmingham, plant. The work to be examined is placed horizontally in a water-filled tank, 40ft long and 4ft wide, and a testing probe is moved over its upper surface. The probe is mounted on a motorizedcarriage which can travel the length of the tank, transverse posi- tioning being effected by a threaded shaft. The probe is connected through a screened cable to an instru-
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