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SPEED in LOADING and

30th December 1932
Page 52
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Page 52, 30th December 1932 — SPEED in LOADING and
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UNLOADING

W1:11.N considering unloading devices, we are almost bound first to deal with tipping gears, since they are so universally employed for sand, ballast, road-making materials, etc. End-tipping and three-way tipping gears are available in large numbers, both for hand and for power operation. The index which concludes this article gives most of the best-known makes, and a few notes on interesting types may pcove valuable.

Bromilow and Edwards, Ltd, backed by long experience, has produced various power-operated hydraulic gears, with 'different layouts to avoid interference by the rams with propeller B38 shafts, brake rods, cross-members, etc., great care being taken to spread the stress as evenly as possible throughout the frame. An important development by this company is that of its highlift tipper, in which the body is sup: ported on a sub-frame, carried on three pairs .of parallel arms. A triple tele7 meopie gear is adopted, the action of the first ram being to elevate the subframe on the arms, whilst the second and third rams actually tip the body. For certain warehouse work such tipping gear produces great • economy in time and labour.

The Hydraulic Hoist Co., Ltd., has produced a parallel lifting hoist, as 'well as a high-lift hoist, which raises the body before tipping. Apart from warehouse work, such a gear is most useful for tipping into a railway wagon or similar vehicle. This company's most familiar tipper is the Wood under-body hoist, employing a horizontal ram with cross-head rollers, which tip the body through the medium of sub-frame cams. The company also produces, however, a vertical type, which is fitted behind the cabs of low-loading vehicles, particularly refuse collectors.

Another interesting Hydraulic Hoist development is a new universal joint, specially robust and able to operate at wide angles. The use of universal joints is essential, because of vehicles standing upon uneven ground. The company makes practically every kind of power take-off.

The latest type of hydraulic gear marketed by Edwards Bros. (Tippers), Ltd., includes a modification, in that it has a double ram, and the complete mechanism is encased in the main oil container.

The Eagle Engineering Co„.Ltd., has had long experience in producing hydraulic gear, and has specialized in trailer equipment, the oil reservoir and pump being generally mounted on the towing vehicle and having a flexible connection. In one variety, universal action of the tipping gear is obtained by the use of cables which pass over pulleys on a cross-head.

' .A sound telescopic-ram type, called the Wirz, is marketed in this country by Lawson Pigott Motors, whilst the St. Paul hydraulic gear is marketed by the Transport Equipment Co.

A well-known and reliable three-way tipper is the Gibson, made by J. Brockhouse and Co., Ltd., whilst an interesting three-way appliance, incorporating two vertical screws with a cross-head that acts upon a curved rail under the body is the Spenborough.

Other tipping gears of various kinds are the Quikko, which incorporates the lazy-tongs principle, the Wearing, Bnma, Crawford, Walters, A. R. Edwards, Noel Paton, Leeson, Jennings, „Taggar, Make and Bell, Cary, Disturnal, Flexion and Heywood.

A device that appears likely to develop in usefulness for both loading and unloading is the Principality moving floor, marketed by C. H. Johnson and Sons, Ltd. This embodies a belt of rubber composition, supported on free rollers and attached at each end to a large roller which can be turned by a detachable handle. The belt, which forms the floor, may be arranged to operate longitudinally or transversely.

An interesting device for bakers' and confectioners' vehicles, etc., is the Itotoro rotating tray, made by Weathershields, Ltd.

For lifting heavy articles, like gas stoves, out of lorries, sliding tilts, such as those made by Messrs. Wadham Bros. save time and labour, modern examples being much freer from vibration than were sliding tilts of some time ago.

Quick-acting, shutters are sometimes preferable to doors, in that they occupy less space and take less time to operate. The earlier examples of this device used to be objectionable on the score of vibration, but modern shutters, such as supplied by G. Brady and Co., and E. Parker and Co., are free from this trouble.

Lift vans, or "containers," aro useful for road-rail co-operation. Carter Paterson and Co., Ltd., has produced quite a light lift van, whilst a concern that aims at reducing weight in these units by the employment of light alloys is the Duramin Engineering Co., Ltd.

Appliances external to the vehicle itself are useful for loading various classes of goods. For sugar-beet, etc., a portable power-driven conveyer, such as that made by the Ewart concern, greatly speeds up the arduous work in the field, whilst other conveyers in a variety of types are made by specialists, such as Herbeft Morris, Ltd., the British Trolley Track Co., Ltd., P. C. Henderson, Ltd., and the Paterson Hughes Engineering Co., Ltd. Another concern which has good experience, particularly as regards elevators of the continuous-bucket type, is Spencer Bros. (Melksham), Ltd.

For loading vehicles from upper floors, roller-type graNity conveyers are valuable; and when arranged in a spiral they occupy little space, besides requiring no power.

Appended is an index to the principal suppliers of the classes of loading and unloading device referred to in this article:—

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People: Noel Paton

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