Fan-cooled Transformer
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LAST October Portable Welders, Ltd., Castle Mills, Buckingham, introduced a new are-welding set known as the Fararc 200 which was claimed to be the first in this country to use a fan-cooled toroidal transformer, This unit has now undergone further development and, in its latest form, is designated the Fararc 240. A new insulation system which can withstand temperatures of up to 180° C. without damage permits the set to be used for longer periods on heavier gauge rod than the previous model. The arc welder weighs 95 lb. and produces 60300 amp., the continuous rating being 200 amp.
Graded Teeth A HACKSAW blade which is claimed .1-3. to eliminate the need to change blades for different materials is offered by . Hacksaws, Ltd., CapeI Street, Sheffield, 10. It is known as the Aven Progressive Teeth blade and, as its name implies, has graded teeth starting at 29 to the inch at the leading end of the blade coarsening to 18 teeth per inch at the rear. The one blade is said to tackle all materials normally cut by hand, replacing the four normal blades needed to cover this range effectively. The Avert blades are available in highand low-speed tungsten steel, Light Freezer A PORTABLE refrigerator weighing rA 30 lb. which can be run off 6, 12, 24, 110 and 220 v. supplies is offered by Edmundsons Electrical Wholesalers, Ltd., 240 Ferndale Road, Brixton, London, S.W.9. Known as the Sivia, it might be fitted to grocery vans making small deliveries of frozen foods. The refrigerator works on the absorption principle and has a capacity of 1.1 Cu. ft., its internal dimensions being 14+ in. by 9 in. by 164 in. It costs £28 7.s.
Long-toad Larnp A N auxiliary lamp for attachment in. to overhanging loads is the latest product of James Neale and Sons, Ltd., Graham Street, Birmingham, I. It costs El 16s. and consists of a light unit and bracket attached to two webbing straps. The lamp, which is known as the Raydyot safety lamp T.60/2400, is offered in 12 and 24 v. forms.
Theft Deterrent 'THEFT of auxiliary lamps from I vehicles is a quite common occur-_ rence. Marchal Distributors, Ltd., Brook Lane North, Gt,. West Road, Brentford, Middlesex, offer an inexpensive device to make the removal of these items if not impossible, at least more difficult. It consists of an internally threaded ring which is screwed on to the bolt securing the lamp after the normal nut has been done up. A grub screw passing through the ring is then tightened by an Alien keY to bite into the bolt thread, making it impossible to remove the lamp without detaching the locking ring, The Lampguard, as it is known, costs 3s. and is available in sizes to suit Lucas, Butler, Marchal and Hells aukiliary lamps.
Hose Heaters SMALL immersion heaters for insertion in the bottom radiator hose are manufactured by Eltron (London), Ltd., Strathmore Road, Croydon, Surrey. Three models, known as the GM2, GM3 and 3M4, are available with loadings of 250, ' 350 and 500 watts for cooling systems of 2, 3 and 4 gal. capacity respectively_ They are all claimed to be capable of maintaining the water in the cooling system at a temperature approximately 100° F. above the ambient.
Balancing Wheels 'THE EasObat balancer for commercial I vehicle wheels has been redesigned and can now accommodate car and light van components in addition to the larger types. With one adaptor plate the standard equipment costs 122 10s. Additional plates (four are required to cover the complete range of commercial vehicle wheels) cost 13 each, whilst the adaptor for car and light van wheels is priced at £6. The balancer is manufactured by Booth Patents, Ltd., 29 Much Park Street, Coventry.
Car Reference THOSE interested in car development and model identification will find a valuable reference source in The Motor Guide to Makes and Models, by David J. Culshaw, The book covers the period from 1945 to 1956 and gives development histories of .55 makes of car including all British models and several Continental marques. It costs I5s. or 15s. lid, by post from the publishers, Temple Press Limited, Bowling Green Lane, London; E.C.1.