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JACKS AND LIFTING TACKLE.
Page 109
Page 110
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Some of the Equipment Which is Available for Use in Garages, as well as by Owners of Vehicles of All Classes.
MIME was when jacks in connection A_ with motor vehicles were chiefly used for tyre-chauging purposes or for raising the wheels from the ground when vehicles were not to be used for some time. In recent years, however, largely as a result of the passing of the old form of inspection pit, the jack has -been gradually developed into an implement usful not only for its original, purpose but in a variety of other ways, and particularly in connection with repairs and m.aintenance. Moreover, •a new class of jack is now available, which, mounted as it is on castor wheels, is able to perform useful service in economizing space in the garage by manceuvring the vehicles into positions that are frequently not otherwise approachable.
The giant pneumatic tyre, and the great increase in the number of heavy trucks and buses, not to mention the long overhang of the latter, have necessitated the production of new forms of jack suitable as well from the weightlifting point of view as from that of their adaptability. As will be seen from tile appended brief descriptions, jack manufacturers have been quick to cater for modern vehicle-lifting requirements and, between them., now produce a range of implements for both garage and salvaging purposes that would seem to cover every possible application.
Among the firms catering for the demand for jacks for raising heavy loads is George Hatch, Ltd., of Queenhithe, Upper Thames Street, 11.0.4, which specializes in the Duff appliances. These are made in a variety of patterns and
capabilities, a notable one, inasmuch as it represents the type adopted by the L.G.0.0. for its emergency :stations, being the Duff-Barrett No. 239, which will deal with loads up to 15 tons, and has a lift of 101 ins.
Included in the range of jacks made by Joseph Bradbury, of New Street Works, Braintree, are several suitablb for use in connection with trucks and public-service vehicles. Among them is the No. 226, intended for machines
fitted with low-pressure tyres. It is fitted with two lifting screws, the de
gree of lift being 104 ins., with minimum and maximum heights of respectively 71 ins. and 174 ins. The lifting and lowering operations are controlled entirely from the handle, a halfturn to the right bringing the raising mechanism into gear and a half-turn to the left the lowering operation. For garage use in connection with trucks and buses with long overhang from the rear axle, the Bradbury heavy duty garage jack will be found a useful tool. The jack, which measures 4 ft. in length by 161 ins in width, is mounted on three small wheels, so that it can be readily rolled into position under any axle with a clearance of 5 ins.; which is almost always 'available.
Another firm specializing in jacks for commercial vehicles is Lake and Elliott, Ltd., Braintree,. which, among others, makes the Millennium double-lift bottle-type jack and one known as the It Commercial, the former having closed and extended heights of respectively 91 ins. and 19 ins., the lift being thus 91 ins. One of the firm's latest introductions is the Millennium char-abanes jack, designed for use in connection with vehicles weighing up to 5 tons. The jack is 8 ft. in length, and enables one man, without stooping, to lift, speedily and with little effort, the entire back or front of a char-h-banes or saloon bus, irrespective of any overhang. The jack is 8 ft. long from centre to centre ; it is a double-lift jack raising from 91 ins. to 191 ins.; the whole of the operating shaft is close to the ground, so that it will clear any obstacles. The load is supported on a machine-cut steel bevel mounted on a ball-bearing. The jack is quickly adjusted to the required axle height by a small balanced handle at the operating end, and the bevel is driven through a long enclosed shaft by a reversible ratchet mechanism which enables the jack to be operated on both forward
and reverse motions of the handle. For very low lift, a toe-piece, shown in outline in the illustration, is provided. This adds to its utility.
Another useful garage jack designed for lifting vehicles up to 21 tons is the Ern-Lake Super, made by Ernest Lake, Ltd., of Bishop's Stortford. The jack has a 9-in, lift, the main crutch lifting from 64 ins, closed to 154 ins, an extension of 31.. insbeing also provided for extra high axles or for use under springs, etc. To enable the jack to be used on vehicles with a long overhang or with rear tanks or buffer bars it is provided with a long, low lever handle. The steel plate body of the jack. gives ample strength and yet allows the crutch to engage the axle within 2 Ins. of the wheel and to work in narrow spaces. The lifting and lowering m'echanism is very strong and simple, only one totally enclosed spring being used. Moreover, as the total lift is obtained by eight strokes of the lever, the time occupied in raising an axle is small. 3For use in connection with vehicles weighing up to about 6 tons, Tangyes, Ltd., Cornwall Works, Birmingham, are making two sizes of their Quick Lift jack with minimum fieights respectively of 12 ins. and 13 ins., the height of lift in both Cases being 5i ins. The tool is operated by open worm gearing, so arranged that the sliding rack can be lifted by hand until its head is in contact with the axle, the lifting operation being continued by turning a long handle.
5,:tAs European representative of the Buckeye Jack Manufacturing Co., of Alliance, 0., 'U.S.A., Theodore Butler, Ltd., of 139, Queen Victoria Street, London, .E.C.4, is in a position to supply jacks capable of lifting up to
25 tons. For use with trucks and buses, up to a weight of 7i tons, the firm recommends the No. 11 pattern in which the leverage kof the handle is compounded by. gearing enabling the weight to be lifted with less effort on the part of the operator than when direct leverage is employed. The jack, which when closed stands 13 ins, high, has a lift of 6i ins., or. a total height of 191 ins. To deal with vehicles weighing up to 10 tons and fitted with large pneumatic tyres, the Buckeye Co. has lately introduced the TT5 jack, which is cylindrical in form, and in which the lifting portion is operated by means of a combination of sdrews propelled by a stub-tooth gearwheel and pinion. The design is such that the weight of the ,load is carried entirely upon a large ball bearing lying in a
substantial bearing plate. The jack, which weighs 2,0 lb., is 10f# ins, high when closed and rises a further 121 ins.
The Holmes garage jack, which will deal with, loads up to 45 cwt., and which is handled in this country by the Fairfield Supplies Co., Ltd., 8, Goring Street, St. Mary Axe, London, E.C.3, embodies a number of useful features. It is mounted on three small wheels, and in its closed position only stands 6 ins, high, so that it can be rolled under the lowest axle. A long handle is provided enabling the jack to be easily operated from .any position, the degree of lift being 8 ins.
The-Swinnow Engineering Co., Ltd., Bramley, Leeds, makes a. jack to lift 2 tons a height of 5 ins., and Denton and Stone, Ltd., Bracebriclge Street, Birmingham, one to lift a similar weight to a height of 81 ins. S. Smith and Souls (MA.), Ltd., ,Cricklewood, N.W2, also supplies a range of jacks suitable for use in connection with commercial vehicles.
Fry's (London), Ltd., 24-6, Water Lane, London, E.C.4, supplies a useful portable jack known as the Indestro for loads up to two tons, the closed height being 9.1t ins, and the lift 61 ins. Henry Miller and Co., Walmer Road. London, W.11, makes the Skyhi oneman hydraulic jack, which is claimed to be capable of dealing with the heaviest vehicles in a convenient and effortless way. This make of jack is constructed in three capacities, some of them with more than one height of lift. The one-ton jack can be 'had to lift from 6 ins. to 14 ins., from 7 ins. to 151 ins, and from 8 ins, to 171 ins.
The two-ton jack is made to lift from 7 ins. to 14 ins, and from 7 ins. to 15i ins. The three-ton single hydraulic jack will lift from 7 ins. to 15 ins. and the double hydraulic jack from 7 to 151 ins. The prices range from £2 10s. to 16 6s. Other makers of jack both for carrying on the vehicles and for use in the garage include the Gar
age Equipment f Braintree, and J. Edwards and Co.,do., 37, Corporation Street, Manchester.
A novel form of inter-connected compound or quadruple jack designed for raising off the ground all four wheels of any vehicle weighing up to
2-11 tons is made by and I.. Ltd., 7, Hertford Street, London, W.1. After fixing the legs, which are connected by a stout chain, in position under the front and rear axles, the wheels can be raised clear of the ground by the operation of a single-ratchet lever. Among the advantages claimed for the arrangement are that it provides easy access to the under part of the chassis, that front and rear wheels can be easily and quickly interchanged to equalize tyre wear, that it facilitates the task of adjusting vehicles fitted with fourwheel brakes and, finally, that when a vehicle is not to be used for some time the wheels can be raised clear of the ground, thus taking the weight off the tyres.