Unit for Discharging Grain and Flour
Page 42
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A DETACHABLE discharging unit for 1-1use with a standard tipping body is shown in patent No. 803,891. Its purpose is to enable the tipper to discharge its load at a controlled rate, and it is intended for grain, flour and other materials. (F. G. Smith (Motors), Ltd,.
H. Baker and E. Warren, 94 Old Broad Street, London, E.C.2.)
The drawing is a rear view of the appliance fitted to a tipping body. The main component is a helically vaned rotor (1) having right-and-left-hand helices. It is rotated by a hydraulically driven chain-and-sprocket (2).
To discharge the load, the body is first tipped to an angle of about 30 degrees from the horizontal. The vaned rotor is then set in motion causing the load to move towards the middle of the body. It falls through an opening in the floor into a control valve (3), and compressed air is applied to carry the material along a flexible discharge pipe (4).
In the case of flour and other materials inclined to pack tight, a vaned shaft (5) may be provided also to agitate the material and assist it to move on to the screw. The whole unit can be detached so that the vehicle is not confined to this specialized duty.
ROTARY DISTRIBUTOR INJECTION PUMP
QUANTITY regulation for a rotary injection pump forms the subject of patent No. 804,569. The plungers are operated by a constant-lift cam and the quantity is controlled by raising or lowering an annular sleeve to vary the effective volume of the pumping space. (Daimler-Benz A.G., Stuttgart-Unterturkheim, Germany.) ROAD SPRING TESTING MACHINE A SPR1NG-TESTING machine forms in. the subject Of patent No. 796,902. The machine may be set to determine a certain characteristic, and if the .spring. under test does not conform thereto, hydraulic peening hammers correct the errors. (P. de Luca. 165a Via Leonardo da Vinci, Via Regio, Lucca. Italy.)
HYDROSTATIC TRANSMISSION
I-1 A SWASH-PLATE transmission intended for heavy road vehicles
is shown in patent No. 804,325. The novelty lies in the arrangement of the parts, the aim being to reduce sliding friction as much as possible. This is done by using maximum angularity and small A36 pistons. (H. Ebert, 2 lin Weller, Furth, Bavaria.)
The input shaft (1) leads to a differential gear which divides the drive between a pair of shafts (2 and 3) each of which drives a swashplate unit. These can be rocked for angular adjustment on pivots (4). The two units are interconnected by passages which pass through the pivot points.
In the position shown, the upper unit is set at zero angularity. in which condition it can neither receive nor discharge liquid. A hydraulic lock is thus created, resulting in a 1 : I drive being transmitted to the output shaft (5).
Lower ratios are obtained by varying the angular settings, and the patent gives a graph illustrating the total working range. Several other designs are shown for transmitting greater power.
TRANSPORTABLE TOWER CRANE
PATENT No. 798.547 gives details of a tower crane, as is used on building sites, that is designed to be taken apart and folded in such a manner that it can be transported complete on a road or rail vehicle. The patent comes from Chan tiers et Ateliers de Construction de Lyon, Lyons. France. •
PETROL-INJECTION PUMP
PATENT No. 804,155 deals with a petrol pump, capable of. providing high pressures for injection systems. The design shown is said to be able to reach a pressure of 185 lb. per square inch or higher. It is also compact and stated to be quiet in use. (Ford Motor Co., Ltd., 88 Regent St., London,
W.I.) • An eccentric-vane 'type of pump is used, and the novelty consists of an ingenious way of converting it to two-stage operation, with negligible leakage in the secondary or high-pressure stage.
The drawing shows a pump of this type, the ordinary action of which is well known. In this case, however, the output from the varying spaces (I) is led to the inner spaces (2) between the vanes and the bottoms of their slots. This forms the
high-pressure stage and leakage is much reduced because of the large sealing areas in continuous contact. The petrol enters and is pumped through ports in the end walls of the pump.
AUTOMATIC GEARBOX CONTROL
PATENT NO. 796,774 comes from General Motors Corp., Detroit, Mich., U.S.A. and shows a gear-changing scheme in which a single valve controls the selection of ratio. The action is modified by a hydraulic device responsive to engine speed. The gearchange is said to be made with the minimum of shock.
RAPID GEAR PRODUCTION
A REVOLUTIONARY process for the rA production of gears is disclosed in patent No. 804,008 by Mitsubishi Nippon Heavy-Industries, Ltd., Tokyo. The gearblanks are placed in a machine whieil first heats the periphery by high-frequency current to forging temperature, and then forcibly rolls the blank against a hardened master gear.
DRIVEN TRAILER AXLES
PAA SCHEME for driving the wheels of a trailer as well as those of iti motive unit is shown in patent No: 804,380. The main feature of the patent is the incorporation oedifferential gears to compensate for differing sizes of tyre, or different degrees of tyre inflation. (L. Mancini, 33. Via Giordano Bruno, Rimini, Italy.) The schematic drawing shows the tractor (I) from which projects a drive shaft, universally jointed to the gearbox (2) on the trailer. The propeller shafts (3 and 4) to the two axles are driven through a differential gear (5) in the gearbox.
A dog-clutch (6) can be used to disconnect the drive to the rearmost axle and connect the leading axle directly to the main driving shaft.
IMPROVED AMBULANCE BODY
ACCORDING to patent No. 798,558, a normal ambulance body will not take French or American stretchers, and the patent shows modifications to permit these types to he accepted in a British body. (Herbert Lomas, Ltd.. 1-landlord. Chester.)