AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

. Injection Pump with New Metering System

15th January 1943
Page 36
Page 36, 15th January 1943 — . Injection Pump with New Metering System
Close
Noticed an error?
If you've noticed an error in this article please click here to report it so we can fix it.

Which of the following most accurately describes the problem?

A N injection pump, designed so that .rt.the accuracy of • its metering is independent of control edges, is shown in patent' No. 548,711 by H. Da Costa and the Plessey Co., Ltd., Vicarage Lane, Ilford.

' The plunger is formed in two parts —an upper free piece (2) and a lower portion (5) which is subject to the action of the cam and the return spring. Between the two parts there is an annular space to receive the fuel A small spring (3) serves to press apart the two plungers, but the distance separating them is limited by a pin coupling.

In operation, fuel, under slight pressure, arrives via a bore in the boss (4) and enters the space between the plungers. Upward movement of the cam lifts the two plungers, with the fuel sandwiched between them, until the exit port (6) is uncovered. The movement of the upper plunger is next arrested by a stop (1), and _frore this , moment the actual injection takes place. The stop (1) thus forms the output control, add, in the ease of a multicylinder • pump, would consist of a camshaft with a cam to each plunger.

If is a feature of the system that the time of termination of injection remains the same, whatever the output. In other words, rise of output would automatically advance the moment of injection.

A CONVEYOR-TYPE SNOW

• SHIFTER

DESCRIBED in patent No. 548,919 is a snow shifting machine,. the patentee being A. J: Burrell, Stonedale, Northowrarn Green, Halifax.. A view of the machine from the front is seen in an accompanying sketch. It is equipped with castor wheels, and is intended to be mounted In front of a standard vehicle, atIthorigh it may, of course, be builtas a self-propelled unit.

As it is driven forwards, the snow is directed, by a pair of curved upright scoops (2), into a central space over a

bottom plate (3). Along this plate run, two conveyor chains carving upstanding plates (4), which gather the snow, lift it up the left-hand girder to the overhanging arm (5), and die

charge it. therefrom to the roadside or intcra co-operating vehicle. The conveyor ,completes its circuit via sprocket. 1 and the right-hand upright.

For driving the conveyor, small power. unit is Mounted on the machine., but, as an alternative, the power may be taken from the propelling vehicle, NON-CORRODING LEAD-BASE BEARING ALLOYS

MODERN lubricating oils often include fatty acids intended to increase the film strength; these, however, may have a destructive action on lead-base allbys of bearings. Such, at least, is the opinion of the National Lead Co., New Jersey, U.S.A., which describes, in patent No. 548,775, various alloys claimed to resist this corrosive action.

Many different formulw are given, a, typical alloy containing the following elements in the percentages indicated: 0.6 of calcium for hardening, 3 of tin for a corrosion inhibitor, 1 of cadmium as .a secondary hardener, and the remainder substantially all lead. The other alloys mentioned contain, in addition to those shown above, steal! percentages of one or more of the following metals : mercury, silver, barium, strontium, copper, aluminium and manganese.

WINCH AND TACKLE-OPERATED GRAVITY TIPPER

TIPPING bodies that can easily be L attached to existing platform vehicles without the -need for structural alterations form the subject of patent No. 548,933. from V. G. Syrnes and C. H. Thompson, both of the 11th New Zealand Forrestry Co. -Bingham

Hall, Cirencester.

. To the existing. platform is attached a pair of angle irons, one on each side, to carry rollers (1) upon which the tipping body rests and moves. Mounted centrally between the angle irons is ' bar (2), which guides a sliding block (3) . The latter can be pulled iii either direction by a cable wound for a few turns around a handoperated clrtim (6). There are pulleys (7) at each end of the block '(3) and at the back and 'front of the -chassis, whilst the two. ends (8). of the cable

are,anchored.to the end cross-members, tespectively. A link (4) connects the body with the block (3).

To 'discharge the load, the body is propelled rearwards, by the winding drum and through the medium of the link, and moves along the rollers (1).

At, or near, the balancing point, a pair of hoOks (5) engages the rearmost rollers and arrests the sliding motion, so that further rotation of the drum causes tipping.

BOX-SECTION FRAME-MEMBER OF NOVEL DESIGN

RIGIDITY and lightness are the main objects of a design of built-up chassis member shown in patent No. 548,897, by Fisher and Ludlow, Ltd., and J. Percival, both of Albioa Works, Rea Street, Birmingham. In the accompanying group of sketches are part of in elevation of a girder (4) and

sectional views. .

Drawing 1, which is a section at point 1, shows the general -form, the girder being built from two angle pieces of sheet metal with mating edges. -secured by welding or riveting. Drawing 2—a section'at 2—shows the means by which the strength, particularly the. torsional. rigidity of the girder, is increased. At points in the length, the outer and inner faces -are pressed into contact and welded. The solid walls thus formed may be of any desired size, and can 'be used .for the attach-' 'tient of. crosS-meinhers• and• ether components. Weaving 3 indicate one of a number of alternative coast-merlons detailed in the specification.

Tags

Locations: Birmingham, Halifax

comments powered by Disqus