A Canadian Refuse-collecting Body . T HE latest suggestions for the
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hygienic collection of refuse are made in patent No. 635,683, which comes from R. Riossonault, Montreal. This inventor describes a body in which the refuse is compressed before being passed into the body.
Referring to the drawing, the bins are tipped into a curved hopper (1) extending across the back of the vehicle. During this time, the entrance to the body isobstructed by a curved trap-door (2). When the hopper is full, hydraulic power is applied to the. lid (3) which then descends and compresses the load into the smallest possible compass.
This completed, the trap-door is raised and further movement of the lid shifts the compressed • block into the interior. As the trap-door redescends, it serapes the inner surface of the lid and so cleans it Of adhering 'natter. When the filled body is.to be emptied, the back is swung upwards about pivot 4. Hydraulic power is then applied to a
pivoted-panel wall (5) in• such a manner.that the bottom is moved
to the left, while the top remains attached to pivot 6. The action is to pull the folding wall into a straight line, corresponding with slope 7, so that the load can tumble out by gravity. The controls are arranged on the right-hand side of the vehicle at the rear.
A LIGHT THREE-WHEELER
iNLIGHT three-wheeled delivery vehicle is shown in patent No. 635,027, by J. van Werven, Apeldoorn, Holland. The basis of the patent is the construction of the steering mechanism.
Referring to the drawing, a single front wheel carries the engine—and transmission, the rest of the vehicle, being merely a two-wheeled trailer:' The front fork is vertical and is located short distance ahead of the. steering pivot (1). The driver's saddle is Placed over the steering pivot and he guides the vehicle by a pair of handlebars (3) at the front.
The handlebar spindle is connected by chain and sprockets to a stationary part of the frame, so that turning the handlebars moves the whale front portion about the steering centre. In order to correct -the direction of the steering, the chain has to be crossed.
A PILOT-INJECTION NOZZLE pi LOT injection can, of course, be obtained by -a. special design of pump, but patent No. 636,080 shows an injector that will give a dual delivery-rate when supplied by a pump of standard pattern. The patentees are G. Kammer and Kammer Engines, Ltd., 13, Eastern Road, Romford, Essex.
Referring to the drawing, the injector shown works in the following manner: Fuel under pressure arrives via pipe I and first seals a ball-valve (2). The n44 fuel then passes down passage 3, forces open a springloaded valve (4) and is finally discharged from a small-bore nozzle (5). This is not, large enough to pass the full charge, so that a rise in pressure occurs, lifting a spring-loaded plunger (6) until port 7' is uncovered.
The latter port leads to. a second nozzle (8) capable of dealing with full output. The two ball-valves in the upper part are provided for the purpose of releasing trapped pressure, because during working, all the interior spaces are subject to full working pressure. The Kammer injector was first dealt with in "The Commercial Motor" for February 18, 1949.
• AN ELECTRIC RADIATOR WARMER
A N anti-freeze device for the cooling t't system of an engine is disclosed in patent No. 636,634, by 3. Runbaken, ; Hill Top, Wilmslow, Cheshire. The ,,device is ,m_acje• to take the place of the . radiator drain-cock so that no alterations tions hav.e•to be made to the vehicle. In the.drawing, 1 is the flange in the radiator bottom in which the cock is normally placed. The heater goes in
• instead, and is provided with a screwed hole in the bottom is replaced. in which the cock (2)
The immersed heating coil (3) is surrounded by a perforated tube (4). the action of which is to cause steam to be generated locally; this is expelled intermittently with some force and So ,oitates the water in the bottom of the radiator. A law voltage is used, either 15 volts from a mains transformer
when at home, or 12 volts from the vehicle battery for short standing
periods on the road., The 15-volt
transformer may also be used to operate a trickle .charger for the batteries. .
A questiqn arises as to whether deposits-in the radiator would have any adverse :effect on the device.
FURTHER ADVANCE IN POWDER METALLURGY
POWDER metallurgy is making rapid progress as a manufacturing process, and it is now possible to form articles in high-tensile steel by a process described in Patent No. 636,921. The patentee"; is .Isthmian Metals [nearporated,'Boston,Mass., .S.A.
• -A typical example of the process is as follows • Itbn powder is mixed with 1 per •cent. 'manganese, 0.9 per cent. carbon,•.and I per cent. of stearic acid to act as a lubricant. The required • • article is shaped by pressing in a die at 25 tons per sq. in and then sintering at 2,000 degrees F. for three hours. The piece is then hot-quenched in a bath of molten solder (500 degrees F.) and immediately placed in the finishing die and pressed to its final shape at 90 tons per sq. in. After pressing, the work is quenched in mercury or other cold fluid, after which it can be tempered by known methods.
Using this process, it is claimed that finished parts in high-tensile steel can be formed to within 0.0005 irt„of size, with a material strength of 60 tons per sq. in. tensile. Its homogeneity can be estimated from the fact that its density is 7.5, which indicates a porosity of only 2 per cent.
It is claimed that there is no substantial distortion even when considerable variations of density are unavoidable because. of the irregularity of the shapes to which the powder is pressed.