New Equipment, Processes and Publications
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Fade and Brake Squeal Overcome?
A NEW type of brake-shoe spring, for
Which the claim is made that it combats brake fade, has been produced by Scientific Engineering Appliances, 26 Central Chambers, Ealing Broadway, London, W.5. It is also stated that it eliminates brake squeal and lasts longer than a normal spring.
• The resinous paint applied to conventional springs is blamed by the firm for the defects which their products are said to overcome: Paint chips off the springs and is ground to a powder. A resin deposit on the facing has a lubri-; eating effect when the brake is applied for a long period, as when descending a hill, and resin dust on the springs intensifies squeal, the spring being held to be the source of resonance.
When brakes squeal, there is also a supersonic vibration causing metal fatigue leading to premature spring failure, it is explained.
S.S. springs, as the products are known, are coiled from galvanized steel-spring wire. Prices compare with those for normal springs.
Transistor-operated Intercom
IT is announced th at Fonadek I (Branson), Ltd., Knightsdowne House, Vivian Road, Birmingham, 17, will be showing a new transistor-operated intercommunication set at the Factory Equipment Exhibition to be held at Earls Court from April 29 to May 4.
A development of the original valveoperated model, the new Kedafon is an addition to the range and allows up to 1,000 ft. between the two speaker/ microphone units. It is more robust in construction, and, although powered only by a torch battery, is said td be clearer and have a greater volume.
Sparking-plug Tester A COMBINED sparking-plug tester 1-3 and screwdriver, which is a redesigned version of their earlier plug tester, is now being produced by J. Stead and Co., Ltd.„ Manor Works. Cricket Inn Road, Sheffield, 2. Stronger, more efficient and cheaper, the new tool costs 3s. 3d.
Packing Standard . .
ANEW British Standard (B.S. 2837; 1957) specifies the requirements for the lifting straps and rings used on packing cases. Previously. the source of guidance on this subject was Section 8 of the Packaging Code (B.S. 1133), but investigation has shown the need for a more precise specification. In consequence, the recommendations in the Packaging Code are being deleted and the new publication will take their place.
The standard provides for seven classes of link and strap assembly having a range of safe working loads from 4 cwt. to 5 tons. Some general guidance is also given on the methods of applying these assemblies to the packing case.
Garage Handlarnp --rHE range of handlamps produced I by Nettle Accessories, Ltd., Harper Road, Wythenshawe, Manchester, 22, has been augmented by the addition of three new models.
Specially designed for garage use, the L233 has a rubber insulated handle with galvanized-steel wire guard and reflector,. A clip-on grip and hook are also provided, and a small bayonet cap holder is fitted. The list price is 17s. 8d.
A black hardwood handle, galvanized steel guard and leather strap handle are features of the model 34. _ It can be supplied prewired with T.R.S.. cable and costs 12s.
The model L34 is a limpet-grip handlamp with a black hardwood handle, galvanized steel wire guard and reflector. If required it can be supplied ready wired, the cable costing extra. The list price is 19s. 4d. Both the model 34 and the model 1,34 can be fitted with E.S. or three-pin lamphaiders.
Anti-rattle Rings ANTI-RATTLE rings of hard rubber are now available for use with the towing ambulances and towing poles manufactured by Harvey Frost and Co., Ltd., Bishop's Stortford. They may be fitted permanently into the eyes of all H.P. towing ambulances and poles, and are priced at 19s. for 2-in, eyes and 11 4s. 6d. for 3-in. eyes Trico Windscreen Washer ANEW automatic windscreen washer known as the Duo-Matic has been announced by Trico-Folberth, Ltd., Great West Road, Brentford, Middlesex. It automatically sprays the screen for six seconds after a single depression of the plunger control, which may be
positioned for hand or foot operation, as desired.
No hand pumping is required and there are no connections to the engine or battery. Two models are available, a standard version with centrally mounted jets and a de luxe type having twin, separately mounted jets. The (-standard model costs 11 12s. 6d. and the de luxe 11 19s. 6d.
Aids to Packaging A RANGE of mechanical instruments
which record shock, impact ot vibration occurring on a vehicle from any direction, is now available from A. Latter and Co., Ltd., 43 South End, Croydon. Surrey, who are distributing the instruments by arrangement with -Testing Machines Inc., of New York.
Manufactured by the Impact-O-Graph Corporation, Cleveland, Ohio, U.S.A., the instruments have three styli which, when excited by impact, leave a trace on a waxcoated paper tape. Results are indicated in units of gravitational acceleration, feet per second free fall and ft./lb.
-Aimed at reducing guesswork and improving conditions in packaging and transport generally, the Impact-O-Graph instruments have a variety of applications from checking the riding qualities of vehicles to determining the properties of cushioning materials.
The range consists of several models. the main difference lying in either their sensitivity to shock or in the speed and method of tape propulsion. Some will record up to 300 times g, others in fractions of g. whilst some tape will ruri continuously on batteries or clock motor for 28 days, others will ,advance only when the instruments are jolted.
Cold Galvanizing Compound ANEW development has taken place in the zinc-rich cold galvanizing compound distributed by J. H. Sankey and Son, Ltd., Aldwych House, London, W.C.2, for the manufacturers, Corrosion, Ltd., under the trade name of Glopane.
The normal standard and universal grades of Glopane are sensitive to the solvent action of cellulose and similar paints. The new development is a grade of Glopane which is completely resistant to the solvent action of cellulose paint and petrol, even up to 100 octane.
Like the standard and universal grades, Glopane V.N. consists of a very fine zinc dust carried in a plastics base with a binder and plasticizer. Applied by the usual paint techniques, it is said to give a degree of protection comparable with that obtained from hot-dip galvanizing or hot-zinc spray.