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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 A New Cam-Activated Squeeze Riveter The overall length is 5 ft. 1⅜ in. and, with a wheel Robustly built for heavy duty and capable of perfect base of 3 ft. 9½ in. the turning radius is only 49 in. rivet forming, the Grampus, distributed by C. Casper Steering and control are extremely simple, with and Co. Ltd. of 146-7 Grosvenor Road, S.W.1, will twist grips and a finger switch for forward and re­ close a ¼ in. steel rivet accurately with one blow. verse. Braking is achieved by raising the handle to the It will also close simultaneously three 3/ in. or five vertical, or lowering it to the horizontal—in the event ⅛ in. steel rivets equally precisely. (See Fig. I). of its being released the handle returns to the vertical the Roots type, and, at the same time, allows the thereby braking the truck and switching off the The 6 in x 3¼ in. scissors type yoke will accommo­ rotors to be simply machined to close limits at the motor. There is a built-in charging circuit and the date a variety of both flat and shaped work, the jaws roots as well as the tips. To achieve the same air per­ truck is supplied with a cable and a 15-amp plug. having been kept to narrow dimensions to allow for formance with a scroll-type rotor is difficult and close corner riveting. The straight tool-holder fitted to Full particulars can be had from the manufacturers, expensive. the standard machine will serve efficiently for most Lansing Bagnall Ltd., Worton Road, Islcworth, The design of the Ventor lends itself particularly to general work. Offset toolholdcrs can be supplied for Middlesex. two-stage layouts by reducing the capacity chamber special requirements. Control is by a foot-operated between the stages, thus saving weight and allowing lever acting through a bell crank on the sliding block scope for a better design of intercoolcr. Due to the which moves the eccentric from the neutral to the close clearances, the thermodynamic performance is working position and thereby causes the reciprocating exceptionally good, ensuring a high adiabatic effici­ motion of the top beam. This machine can also be ency; this efficiency is maintained at a high level adapted for various punching and pressing operations. throughout the speed range so that where there is The Grampus is a compact, self-contained, totally pressure regulation by varying the supercharger speed enclosed unit that is easily operated and requires a no undue 'drop-off' is experienced, as in the case of a minimum of maintenance. centrifugal type of compressor. Silence of operation has received special attention; Specification helical gears, specially designed bearing housings, and Capacity: One ¼ in., three 3/ in., or five ⅛ in. full cup the helical port contribute to this end. Lubrication head steel rivets. may be entirely self-contained and provides for the Weight: 450 lb. Pressure exerted supercharger being mounted in any convenient posi­ at snaps: 15 tons tion. A new type of labyrinth oil seal is employed Yoke: 6 in. X 3¼ in. Maximum gap obviating breakdown possibilities or low temperature between snaps: 1¼ in. hardening of the commonly used rubber substances. Height: O/A 45in. Working height: 39 in. Oil cannot reach the air in the main supercharger Width: O/A 20½ in. Width of jaws at chamber under any operational conditions. front: 1½ in. Full particulars can be had on application to the Depth: O/A 32 in. Yoke protrudes: 7½in. Technical Advisory Service of Wade Engineering Ltd., Ball and roller bearings on cam shaft and eccentric. Gatwick Airport, Horley, Surrey. Momentum by two 12 in. diameter flywheels. Electrical equipment: 1½ h.p. motor with ironclad push-button control switch fitted with under- voltage and over-current protection. AN IMPORTANT MATTER Electrical supply: 400/440 volt a.c. 3-phase 50 cycles. 'D' Fibre for Aircraft Shipping details: Each machine packed in case size SIR, 50 in. x 23 in. x 37 in., gross weight 580 lb., net 'D ' fibre is the finest texture fibrcglass product, During the war years the demand for Gear weight 450 lb. Price of case, £3 15s. which is produced and has a density of 0·9 lb. per cu. Grinding and Spline Grinding Machines was ft. and a thermal conductivity of 0·22 B.T.U/sq.ft./in/F. It is at the moment used solely in the aircraft in­ extremely heavy and the output of our machines dustry and is supplied for the insulation of cabins and was many times more than any normal con­ for the absrrption of sound. It is supplied in the form sumption. A great many of the machines have of a mat usually 1 in. thick and is either backed or un­ been offered for disposal through the Govern­ backed. The backing medium is transparent film very ment Pool and the Auction Sales. Many pur­ similar to cellophane which acts as a vapour barrier chasers have been buying such machines with­ and minimizes condensation in the inside of the cabin. out due knowledge that some of these machines The usual application of this material is to apply were built for special requirements, with very two thicknesses of 'D' fibre backed on one side by unsatisfactory results to themselves and, un­ this transparent film and to have the two layers of film form a sandwich between the two layers of 'D ' fibre, fortunately, sometimes resulting in rather wrong thus there is a layer of 'D ' fibre against the outer skin impressions of our desire to co-operate with any of the aircraft and a layer against the inner skin. users, of our machines. The material is wrapped in a continuous manner What happens in so many cases is, a user buys from the top of the aircraft completely round the shell one of these machines at what is apparently a and back to the top again in one process, without the very low figure indeed, then, when he wants to material being cut in any way. These continuous start it up, gets in touch with us. Invariably we strips are carried along the full length of the aircraft find inaccuracies, shortage of the right equip­ and result in a very great absorption of sound, very efficient thermal insulation and they cut condensation ment and sometimes machines which cannot be to a minimum. adapted at all, having been built for a particular The material is now very widely used by the air­ job. The position has become a very acute one, craft industry and the following aeroplanes are some and, unfortunately, we now have to take steps to of those so fitted: Vickers-Armstrongs Viking, in­ advise that we can take no responsibility for the cluding the King's Flight; Percival Prince; Handley proper operation of machines which are bought Page Hermes IV; De Havilland Dove; Bristol without consultation with us. All of this can be Brabazon II and Wayfarer, and the Short flying boats. very expensive and sometimes unsatisfactory to Fibreglass Ltd., of 123 Pall Mall, London, S.W.I, both the user and ourselves. the manufacturers, will be pleased to give full particulars on request. I have no doubt that there are other manufac­ turers of specialized machines who are finding A Nov Cabin Supercharger themselves in similar difficulties, therefore I am The lightness and simplicity of the new Vcntor writing this letter in the hope that you will pub­ Roots type blower (Fig. 3) make it particularly suit­ lish it and that it will be a helpful guide to able for aircraft cabin pressurization layouts, al­ potential users of our and other specialized though it has been designed for general applications. machines. For Shop Transportation Constructional materials have been selected to com­ Yours faithfully, Fig. 2 shows what is claimed to be the first all- bine lightness with the correct maintenance of working for the Gear Grinding Company Limited British pallet truck. The standard model shown has clearances under wide variations of operating tem­ A. H. ORCUTT a maximum capacity of 2 tons and weighs only peratures. 10 cwt. The forks are 36 in. long and 27 in. wide, while Cranmore Boulevard Managing Director The helical port simplifies the silencing of the output they have a 'low' position of 3⅛ in. and a lift of 4 ft. pulsations normally associated with a supercharger of Shirley, Birmingham January 19, 1949 March 1949 93 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 21 (3): 1 – Mar 1, 1949
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb031742
Publisher site
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Abstract

A Selection of Notes on Recent Equipment and New and Well-Tried Methods and Materials A New Cam-Activated Squeeze Riveter The overall length is 5 ft. 1⅜ in. and, with a wheel Robustly built for heavy duty and capable of perfect base of 3 ft. 9½ in. the turning radius is only 49 in. rivet forming, the Grampus, distributed by C. Casper Steering and control are extremely simple, with and Co. Ltd. of 146-7 Grosvenor Road, S.W.1, will twist grips and a finger switch for forward and re­ close a ¼ in. steel rivet accurately with one blow. verse. Braking is achieved by raising the handle to the It will also close simultaneously three 3/ in. or five vertical, or lowering it to the horizontal—in the event ⅛ in. steel rivets equally precisely. (See Fig. I). of its being released the handle returns to the vertical the Roots type, and, at the same time, allows the thereby braking the truck and switching off the The 6 in x 3¼ in. scissors type yoke will accommo­ rotors to be simply machined to close limits at the motor. There is a built-in charging circuit and the date a variety of both flat and shaped work, the jaws roots as well as the tips. To achieve the same air per­ truck is supplied with a cable and a 15-amp plug. having been kept to narrow dimensions to allow for formance with a scroll-type rotor is difficult and close corner riveting. The straight tool-holder fitted to Full particulars can be had from the manufacturers, expensive. the standard machine will serve efficiently for most Lansing Bagnall Ltd., Worton Road, Islcworth, The design of the Ventor lends itself particularly to general work. Offset toolholdcrs can be supplied for Middlesex. two-stage layouts by reducing the capacity chamber special requirements. Control is by a foot-operated between the stages, thus saving weight and allowing lever acting through a bell crank on the sliding block scope for a better design of intercoolcr. Due to the which moves the eccentric from the neutral to the close clearances, the thermodynamic performance is working position and thereby causes the reciprocating exceptionally good, ensuring a high adiabatic effici­ motion of the top beam. This machine can also be ency; this efficiency is maintained at a high level adapted for various punching and pressing operations. throughout the speed range so that where there is The Grampus is a compact, self-contained, totally pressure regulation by varying the supercharger speed enclosed unit that is easily operated and requires a no undue 'drop-off' is experienced, as in the case of a minimum of maintenance. centrifugal type of compressor. Silence of operation has received special attention; Specification helical gears, specially designed bearing housings, and Capacity: One ¼ in., three 3/ in., or five ⅛ in. full cup the helical port contribute to this end. Lubrication head steel rivets. may be entirely self-contained and provides for the Weight: 450 lb. Pressure exerted supercharger being mounted in any convenient posi­ at snaps: 15 tons tion. A new type of labyrinth oil seal is employed Yoke: 6 in. X 3¼ in. Maximum gap obviating breakdown possibilities or low temperature between snaps: 1¼ in. hardening of the commonly used rubber substances. Height: O/A 45in. Working height: 39 in. Oil cannot reach the air in the main supercharger Width: O/A 20½ in. Width of jaws at chamber under any operational conditions. front: 1½ in. Full particulars can be had on application to the Depth: O/A 32 in. Yoke protrudes: 7½in. Technical Advisory Service of Wade Engineering Ltd., Ball and roller bearings on cam shaft and eccentric. Gatwick Airport, Horley, Surrey. Momentum by two 12 in. diameter flywheels. Electrical equipment: 1½ h.p. motor with ironclad push-button control switch fitted with under- voltage and over-current protection. AN IMPORTANT MATTER Electrical supply: 400/440 volt a.c. 3-phase 50 cycles. 'D' Fibre for Aircraft Shipping details: Each machine packed in case size SIR, 50 in. x 23 in. x 37 in., gross weight 580 lb., net 'D ' fibre is the finest texture fibrcglass product, During the war years the demand for Gear weight 450 lb. Price of case, £3 15s. which is produced and has a density of 0·9 lb. per cu. Grinding and Spline Grinding Machines was ft. and a thermal conductivity of 0·22 B.T.U/sq.ft./in/F. It is at the moment used solely in the aircraft in­ extremely heavy and the output of our machines dustry and is supplied for the insulation of cabins and was many times more than any normal con­ for the absrrption of sound. It is supplied in the form sumption. A great many of the machines have of a mat usually 1 in. thick and is either backed or un­ been offered for disposal through the Govern­ backed. The backing medium is transparent film very ment Pool and the Auction Sales. Many pur­ similar to cellophane which acts as a vapour barrier chasers have been buying such machines with­ and minimizes condensation in the inside of the cabin. out due knowledge that some of these machines The usual application of this material is to apply were built for special requirements, with very two thicknesses of 'D' fibre backed on one side by unsatisfactory results to themselves and, un­ this transparent film and to have the two layers of film form a sandwich between the two layers of 'D ' fibre, fortunately, sometimes resulting in rather wrong thus there is a layer of 'D ' fibre against the outer skin impressions of our desire to co-operate with any of the aircraft and a layer against the inner skin. users, of our machines. The material is wrapped in a continuous manner What happens in so many cases is, a user buys from the top of the aircraft completely round the shell one of these machines at what is apparently a and back to the top again in one process, without the very low figure indeed, then, when he wants to material being cut in any way. These continuous start it up, gets in touch with us. Invariably we strips are carried along the full length of the aircraft find inaccuracies, shortage of the right equip­ and result in a very great absorption of sound, very efficient thermal insulation and they cut condensation ment and sometimes machines which cannot be to a minimum. adapted at all, having been built for a particular The material is now very widely used by the air­ job. The position has become a very acute one, craft industry and the following aeroplanes are some and, unfortunately, we now have to take steps to of those so fitted: Vickers-Armstrongs Viking, in­ advise that we can take no responsibility for the cluding the King's Flight; Percival Prince; Handley proper operation of machines which are bought Page Hermes IV; De Havilland Dove; Bristol without consultation with us. All of this can be Brabazon II and Wayfarer, and the Short flying boats. very expensive and sometimes unsatisfactory to Fibreglass Ltd., of 123 Pall Mall, London, S.W.I, both the user and ourselves. the manufacturers, will be pleased to give full particulars on request. I have no doubt that there are other manufac­ turers of specialized machines who are finding A Nov Cabin Supercharger themselves in similar difficulties, therefore I am The lightness and simplicity of the new Vcntor writing this letter in the hope that you will pub­ Roots type blower (Fig. 3) make it particularly suit­ lish it and that it will be a helpful guide to able for aircraft cabin pressurization layouts, al­ potential users of our and other specialized though it has been designed for general applications. machines. For Shop Transportation Constructional materials have been selected to com­ Yours faithfully, Fig. 2 shows what is claimed to be the first all- bine lightness with the correct maintenance of working for the Gear Grinding Company Limited British pallet truck. The standard model shown has clearances under wide variations of operating tem­ A. H. ORCUTT a maximum capacity of 2 tons and weighs only peratures. 10 cwt. The forks are 36 in. long and 27 in. wide, while Cranmore Boulevard Managing Director The helical port simplifies the silencing of the output they have a 'low' position of 3⅛ in. and a lift of 4 ft. pulsations normally associated with a supercharger of Shirley, Birmingham January 19, 1949 March 1949 93

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Mar 1, 1949

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