New Scammell Rocking Beam Drive for Six-wheelers
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Mechanism Resembling "Pioneer Arrangement Incorporating Certain Improvements and of Lighter Design. Primarily Intended for Military Application
ANEW mechanism for the transmission of power to the our rear wheels of a six-wheeler, in which a rocking beam is employed and the wheels on one side can rise and fall independently of those on the other side, has just been patented by Scammell Lorries, Ltd., Watford. The specification number is 501,242.
Resembling, basically; the system that is a familiar feature of the well-known Scammell Pioneer model, the new device differs in a number of important respects and is lighter. We understand that its principal application will be to machines for military purposes, doubtless of the crosscountry type that acquitted themselves so splendidly in the War Office North Wales Trials, which were run off last autumn.
In addition to lightnesS, compactness and accessibility are features of the new design. From the accompanying sectional plan view it will be seen that a single axle shaft drives a pair of wheels on one side of the vehicle. The drive-shaft axis is also the centre about which the assembly rocks as a whole. The shaft carries a spur gear which drives, via a pair of idlers, a gear (4) on each of the wheel axles. Each wheel carries a brake drum (5), the mechanism of which is operated by push-rods (9) actuated, in turn, by levers (2) from the rodwork (1).
Accessibility is assisted by the provision of a central cover plate (7), which is large enough to permit the primary gear to be withdrawn, whilst covers (3) give access to the inner wheel bearings. The main wheel hearings (8) are carried in conical housings (6) spigoted into the main casing.