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Power Steering Control Valve
Page 122
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IMPROVEMENTS in valves controlling I the pressure fluid in a powered steering system form the subject of patent No. 865,759. (R. Bishop, R. Johnson and G. Whitlock, 28 Marlborough Road, Luton.) The valve is shown in section in the drawing. A sliding member (1) has a narrow close-fitting land (2) in the middle. This co-operates with an inlet port (3) and two outlets (4 and 5) which lead to each end of the servo-cylinder. An exhaust port (6) leads back to the pump.
In the central position shown, the incoming fluid divides into two streams HYDRAULIC ACTUATOR IMPROVEMENTS DATENT No. 865,223 refers to 1 hydraulic actuators of the type in which a vane moves through a sectorShaped chamber. The efficiency of such devices depends entirely on the accuracy of the fit of the vane, and to improve this is the object of the scheme disclosed. (Girling, Ltd., Kings Road, Tyseley, Birmingham, 11.) In the drawing, a section of a typical chamber containing the moving vane (1)
's shown. Instead of machining the inner curved surface (2) accurately, which is an expensive operation, it is proposed to leave it as cast. To form a seal, a curved plate (3) is inserted and held in position by two end rods. The curved plate is said to be easily manufactured to the required degree of accuracy.
The closeness of fit is controlled by an adjustment consisting of a screw (4) pressing on the outside of the liner.
CONVEYOR FITTED BODY A BODY designed for the rapid load
ing and discharge of heavy solid materials such as coke is shown in patent No. 865,097. The body may also be of use on a building site to shift or elevate material, (Concrete Carrying Co., Ltd., Pilling Street, Rochdale Road, Manchester, 4.) The body is constructed in the form of a hopper and at the bottom it is provided 1340 which pass through end chambers (7) and out of the exhaust port.
If the spool is moved to the right, it stops the right-hand flow and directs all the fluid pressure to the left, the exhaust port being cut off by a face-valve (8).
On the return stroke the face-valve opens to give a very rapid change of pressure.
Movement of the spool to the left directs fluid to the right-hand outlet, and the spring (9) ensures that the spool is normally retained in a central position.
with a belt conveyor (I) for discharging the load at the rear.
In addition to the internal conveyor, an external one is carried on the outrigger (2). Normally housed under the body, it can be drawn out into the operative position illustrated. It is supported by a jib which can swing sideways on pivots (3). The jib can also be raised or lowered by an hydraulic cylinder (4). The power for driving the conveyor is also transmitted hydraulically.
A consecutive patent numbered 865,098 deals with other aspects of the scheme.
PORTABLE CEMENT SILO
Pl.A STORAGE vessel for cement that can also be used for transporting it forms the subject of patent No, 864,868. Though described particularly for cement, the patent covers the use of the scheme for any powdered material. (Road Machines (Drayton), Ltd., Horton Parade, West Drayton, Middlesex.)
The drawing shows the container (1) in the transport position in which it functions as a trailer. The cylindrical body is arranged to pivot about the point (2).
Opon arrival at the site. the container is raised to a vertical position and the contents discharged by gravity from an opening (3). Compressed air may be blown into the interior to expedite the outflow. DIESEL ENGINE COMBUSTION SYSTEM
PATENT No. 865,536 refers to oilengine pre-combustion chambers in which the fuel charge, instead of being atomized by a fine jet, is spread in a thin film over the wall of the chamber. According to the specification, while this scheme is satisfactory under load, it can make starting difficult, and the subject of the patent is a modification that avoids this defect. (J. Effenberger, 55 Mainzerstrasse, Bingen, Germany.)
The chamber shown in the drawing is substantially spherical and is provided with a nozzle (1) to introduce the charge. The fuel flows in a thin film (2) over a narrow band of the spherical surface.
Essence of the scheme is the provision of a sharp edge (3) to the air entry duct (4). When the fuel film reaches this edge it is detached in the form of a fine spray that ignites easily. Another scheme shows the edge located at a different part of the chamber.
BALANCING PROPELLER SHAFTS
APROPELLER shaft which is unbalanced can be corrected by adding mass locally, but if this is done by welding there is a risk of distortion. Patent No. 863,478 covers the use of metal spraying for this purpose as the spray carries little heat. The patent comes from Gelenkwellenbau G.m.b.H., Westendhof 7, Essen, Germany.