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AIDING TYRE HANDLING AND INFLATION.

16th February 1926
Page 28
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Page 28, 16th February 1926 — AIDING TYRE HANDLING AND INFLATION.
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Devices for Fitting and Removing Outer Covers. Types and Makes of Jack. Power, Foot and Hand-operated Pumps, Pressure Gauges.

-ti A S a result of the great increase in

the employment of pneumatic tyres it has became essential to make use of special equipment by which their handling, inflation, etc., can be facilitated. Even the lifting of a wheel of a heavy vehicle equipped with, say, 7-in. or 8-in. tyres is no mean task-, and it is advisable for such Work to use mechanical aids, such as small trollies or trolley jacks, or, where large numbers have to be handled, suitable cranes.

To those Who require such equipment we would suggest that they get into touch with Harvey Frost and Co. (1924), Ltd., 148-150, Great Portland Street, London. W.1, and Lake and Elliott, Ltd., Braintree, Essex.

As regards the actual fitting and detaching, of giant pneumatic tyres, this is dealt with in another article, but certain difficulties occur with tyres mounted on split rims. For these one of the most useful tools is the H.F. Universal Rim Tool, which is becoming a recognized appliance for the purpose, and even America, the home of the split rim, has adopted it, the output in that country being no less than 200,000.

As will be seen from our illustration, this tool is simple and compact. It is positive in action, and springs the rim without forcing it. It is equally efficient whether contracting or expanding.

Then for both beaded and straightsided tyres there is the H.F. Universal Tyre Changer. Any tyre on any kind of

detachable rim or wheel comes within its scope, and it turns what is usually a lengthy and laborious task into easy work Of a few minutes' duration only,

and no brute force is required. We have seen this tool in operation, and it is extraordinary how quickly a tyre can be fitted. Both of these tools are made by Harvey Frost and Co., Ltd.

Amongst the many useful tools marketed by Lake and Elliott, Ltd., Braintree, Essex, is the Millennium tool for the contraction and expansion of split rims. The standard type is designed for rims 32 ins, by 4 ins., but the tool can be supplied with a longer screw for larger rims at a small extra cost.

B44 Millennium wheel pullers also prove extremely useful when wheels are inclined to be refractory.

The number of jacks marketed in this country is very _large, but not all are satisfactory for commercial work, as this calls for exceptional strength and such ease of operation that they can be used in conjunction with the heaviest vehicles. This applies particularly to garage jacks, as these may be called upon to deal with almost any load: less powerful jacks can, of course, be used by those who employ the lighter classes of commercial vehicle.

A neat and useful type is the Lucas "King of the Road Hydraulic" No. 10, made by Joseph Lucas, Ltd., Great King Street, Birmingham. It is a doubleaction type lifting with both the up and down strokes, and is, suitable for vehicle weighitg not more than 3 tons. It has a base some 6 ins, in diameter, and a body of aluminium alloy. The height closed is 8-i ins., and when fully expanded 19 ins., the price, being £4 4s.

Another interesting jack of the hydraulic type is the Skyhi, made by Henry Miller and Co., Weimer Road, London, W.11. This weighs 9 lb., can lift with ease 2 tons. measures 94 ins. closed, and 184 ins. open, and has a double-acting pump, whilst the ram is telescopic. It is priced at 12 10s,, which, considering its careful manufacture, is a most reasonable figure.

A useful range of jacks is also made by the Dunlop Rubber Co., Ltd., Fort Dunlop, Erdington, Birmingham. The Special model, which is built in three sizes up to .9 ins, lift, is suitable for 'vehicles weighing 1119 to 4 tons, and is priced at £1 7s.

The well-known Tangye range of jacks is marketed by Imperial Motor Industries, Ltd., 11, Denmark Street, London, W.C.2. It includes garage jacks running on rollers and suitable for medium loads, screw bottle jacks for lifting weights up to 16 tons, the Transport model for heavy work, such as lifting lorries, the Quick Lift types, the smaller one suitable for delivery vans up 3 tons, and the larger for buses, etc., weighing up to 6 tons.

One of the most favoured garage jacks is the Millennium, which has been on the market for some 25 years. Lake and Elliott, Ltd., its manufacturers, also make the Midas, which is a smaller edition of this appliance. The Millennium is suitable for vehicles weighing 2 tons, whilst the Midas is for lighter types. The price of the Millennium is 13 10s., and of the Midas £1 11s. 6d. The type

It is designed for commercial vehicles. It has a spinning-nut quick adjustment and lever and ratchet gear. Bottle jacks for heavy vehicles are made in two types, for dealing with 3 tons and 30 Mt. respectively, the prices being 20s. and 16s.

One oi the most useful garage tools is the Hi-lift jack, another Haryey Frost speciality. This is a modern substitute for the unappreciated and rout-of-date pit. It affords complete accessibility to the under parts of the chassis by raising the vehicle fore or aft to a maximum height of 3 ft. 44 ins.

Safety stands can also be provided so that the jack can be used for other t ' purposes while the vehicle is retained on these.

Another useful adjunct to this jack is the truck wheel dolly attached to the jack, which solves the difficult problem of handling heavy wheels with speed and safety, as only one man is needed.

To be really effective, it is essential that pumps intended to be employed on commercial vehicles should be thoroughly well made from high-quality materials.

For garage use the power-driven type is very satisfactory. Amongst these is the Air-on-Wheels electric type, coeds ally designed for inflating giant tyres up to 150 lb: pressure. This embodies no gears, chains or belts, and there are no exposed working parts. It consists of a two-cylinder vertical air compressor, water-cooled and fitted with bronze valves and seats. It is driven through a flexible coupling by a -k h.p. electric motor complete with starter, the whole being mounted on a cast-iron base integral with which is an oil and water catcher to secure the provision of dry air. A giant tyre can be inflated in under five minutes, and fitted with a motor wound for 110 or 220 direct current, the price is £35, and for alternating current £36. Larger plants can he quoted for if required. It is manufactured by William Knott and Son, Ltd., Fairfield Street, London Road, Manchester.

Another pump of the electrically driven type is the Black and Decker Lectroilater marketed by Gerrard and CO.. Ltd_ 15-19, Great Titchfield Street, London, WI. This operates on direct or alternating current as required, and is made in three types, for carrying about like a satchel, for securing to the , wall, or mounted on a carriage. The motor is series compensated wound, develops • hp, and drives a compressor baring a single cylinder with a detachable head, and air-jacketed for cooling, the air being circulated by 'a centrifugal fan. The whole of the mechanism is enclosed and provided with wick lubricators.

Much use is now made of foot pumps both for garage use and for carrying on vehicles. Of these one of the first successful types was the Wood-Milne, made by British Modricli Rubber Co., Ltd., 50, Pall Mall, London, S.W.1. The frame is made of die-east aluminium, and the cylinder is firmly embedded and secured to the frame casting. The piston is actuated horizontally and in line with the cylinder by toggle levers through the agency of a rail; Cress-head and two guide rods. It is made in several models -varying only in Capacity. For general • work there is the 2-in. Sise at 13 17s. 6d., but pumps with cylinders up to 2l ins, bore can he supplied to order. llitttersley and Davidson, Ltd., 139, . Norfolk Street, Sheffield, are the makers of the Handy multi-stage foot pump. It has three cylinders, and is exceedingly

easy to operate. The cylinders are hinged as a unit to the base and plungers are actuated direct by a simple pedal through the medium of arocking

member. Complete with gauge, the cost of this pump is £2 10s. . The same makers market triple compression hand pumps with folding, ball socket or cast feet, the last-named being particularly suitable for garage work, and cost 12 15e., including the gauge.

The patent Kismet-Duplex foot pump,

which is equipped with Renrut pressure gauge—an instrument claimed to be unbreakable—is made by William Turner and Brother, Ltd., Eyre Lane, Sheffield, and marketed at the price of 12 18s. 6d.

Another, useful type of foot pump, which is of British manufacture and sells at the moderate price of £1 18s. 6d., is the LILL, Made by Imperial Motor Industries, Ltd. The cylinder is of stout weldless tube, and the piston has two rods which pass through bearings in the cap, and keep it in true alignment. The piston head is so constructed that on the down stroke no compressed air will remain in the cylinder.

The Pioneer engine tyre pump made by Fluid Pressure Pumps, Ltd., Clifton Street Works, Latimer Road, London, W.11, is of particular interest, as it has already been used with great success on many commercial vehicles, and is stated by the makers to have been adopted as standard equipment by Karrier Motors, Ltd.

When in use it is screwed into the sparking plug hole of one cylinder, and is so arranged that only pure cold air from outside the cylinder is delivered. This is effected by so arranging the pump that the 44ressure in the engine cylinder merely acts as a cushion for transmitting power from the piston of the engine to that of the pump. It weighs only 2-1 lb., and is priced at £3 3s. complete with 12 ft. of tube, it guaranteed gauge and a patent connector.

We must not conclude without referepee to one very important adjunct to pneumatic-tyre inflation, that being the pressure gauge; satisfactory instruments of this type are the Schrader, Michelin and Dunlop, and others are embodied in the pumps described.

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