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168 
TIPPING GEARS
Page 102
Page 103
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as an Economic Factor
Some Particulars of Tipping Gears of Diverse Types Designed to Give Speedy Working at Low Cost; Weight Reduction a Feature of Modern Design
THE use of tipping gears has proved an effective means for speeding up unloading and, at the same time, for reducing operating ccsts to a minimum. Both the power and manually operated types have many adherents, and each has certain advantages that make it particularly suited to the different needs of various classes of user.
On the score of speed the poweroperated tipping gear is, perhaps, to be recommended, but this factor may be offset by the necessity of weight reduction which may be achieved by the use of the manually operated type.
A variety of tipping gear's is manufactured by Bromilow and Edwards, Ltd., Foundry Street, Bolton, an interesting model being a ball-bearing screw tipper, in which an endless chain of ball bearings is employed to minimize friction. A range of hydraulic gears' is also marketed by this concern.
A vertical single-screw tipping gear for loads up to two tons, in which the operating mechanism is enclosed in an oiltight box, is the Buma made by the Blum Engineering Co., Newcastle-onTyne.
William E. Cary, Lid., Red Bank, Manchester. 4, is the maker of handD44
operated gears of the single, double and telescopic types and designed to lift from 1 to 10 tons. The 30-40-cwt. telescopic-Screw type is of sturdy construction and low in price.
Hydraulic and mechanical tipping gears of every type are marketed by R. A. Dyson and Co., Ltd., 76-80, Grafton Street, Liverpool 8. A feature of this concern's manually operated gear is the provision of a patented universal gearbox which allows the screw a lateral action, this providing for self-alignment under all conditions.
The Eagle hydraulic end-tipping gear is of the twin uuderslung-ram type and has a capacity of 2-10 tons. The rams are designed to give a tip of 40 to 45 degrees, depending upon the layout of the chassis. The pump is driven direct from a power-take-off box consisting of an oil-retaining steel box containing a sliding gear meshing with the take-off. A positive cut-out valve prevents overtipping and theatpump can be left running without fear of damage.
The Eagle Engineering Co., Ltd., Warwick, is the manufacturer of this gear, and the same concern also markets a range of band-operated . single-screw end-tipping gears.
tipping gear of unusual design is the Theed. The operation is pneumatic, an air compressor being fitted on the near side of the gearbox. The compressed air is taken to a three-way valve, through which it is directed to the ram. The Theed pneumatic gear has a multi-purpose capacity in that the compressed air may be utilized to inflate the tyre's, or for spraying paint or penetrating oil. This interesting gear is marketed by Hamilton Motors (London), Ltd., 466-490, Edgware Road, London. W.2.
A number of manufacturers markets simple hand-operated tipping gears of straightforward design, and the follow
ing names are representative of concerns which make well-made and durable gears of this type :—Henry Lowe and Sons, Ltd., Falcon and Downey Ironworks, Royton, which manufactures the Falcon tipping gear ; Milshaw Tipping Gear Co., Birch Lane Works, Rooley Lane, Bradford ; Noel Paton, Ltd., Mabor Works, Famley, Leeds ; J. W. Pickavant and Co., Ltd., Frederick Street, Birmingham, 1; Frederick Selby and Co., Ltd., Longrnore Street Works. Birmingham ; George Wearing, Ltd., West Bromwich.
Several interesting features are to be found in the hand-operated three-way hydraulic tipping gear produced by the Spenboro ugh Engineering Co., Valley Works, Heckmondwike. The unit is mounted upon a sub-frame in the centre of which is the hydraulic ram. The pump may be operated from either side of the vehicle by means of a detachable handle, and is connected by a short pipe to the ram. Movement of the handle backwards and forwards forces oil into the ram. A bearer arm is mounted in such a manner that it may be turned into the desired position to give either side or end tipping, and a steep angle of tip is
obtained with •a relatively small lift of the ram. It is claimed that a 21-ton load can be tipped in about one minute with this gear. Further products of this concern include a power-driven hydraulic gear notable for an ingenious swash-plate pump of small dimensions, and a hand-operated tipper which may be attached to the chassis by six U bolts; no drilling of the frame members being needed.
The Rock end -or three-way hydraulic tipping gear is manufactured by the Truck and Tractor Appliance Co. (Manchester), Ltd., Trafford Park, Manchester 17. In this design the ram and
cylinder are mounted horizontally and located by a three-point suspension to a sub-frame, which, in. turn, is mounted on the main chassis frame. This feature enables the gear to be neatly housed, jand by means of the threepoint suspension any possibility of damage clue to distortion of the main frame is eliminated.
The pump system is totally enclosed and there are no external reservoirs requiring filling. During the action of tipping the oil, simply passes from one side of the piston to the other, making for efti.
ciency in operation and allowing a neat layout of the oil pipes. A full 45-degree tip is obtainable and gears can be supplied having caps.
cities of from 2 tons to 15 tons. .
A tipping gear of the hydraulic type is manufactured by the Sentinel Waggon Works, Ltd., Shrewsbury, and it is often fitted. to steam wagons pro-. duced by that concern. In this case the means for operating an hydraulic, gear is available in the boiler pump. .
A low-pressure hydraulic gear, in which the body is lifted through the medium of a pair of cams operated by the hydraulic ram, is the Wood manufactured by the Wood Hydraulic Hoist Co., -Ltd., Southport. The hydraulic cylinder is. set horizontally and the piston rod carries a cross-head, •
The method of discharging the load by means of a Moving floor is gaining popularity and is dealt with in another article in this issue.
The names and addresses of other tipping-gear makers follow :
Messrs. Henty Boys and Sons, Oxford Street, Fleck, Walsall:
Brockhouse and Co., Ltd., victoria Works, Hill Top, West Bromwich.
Clayton Dewandre Co., Ltd., Lincoln.
R. Distnrnal and Co., Bridge Works., Wednesbary: Edwards Brothers 1TiPpere), Ltd., Bradford Street, Bolton.
Alfred Jagger, 5-8, Green Lane, J. II. Jennings and Son, Ltd., Sandlyach. Lawson Pigutt Motors, 520-5, King Street, London, W.6.
Joseph Lea and Sons, Dyche.Street, Rochdale Road, Manchester.
J. Perks and Son, Crown Werks, Lye, Sitotirbridge.
Spencer 1M elksharrd, Ltd., Aldwych Aldwych, London, W.0 2 'ruse and Bell, Ltd., Carlton Engineering Woes.s. Lichfield,