British Railways Board

Maurice G Pollard

Roger M Goodall

Robert Illingworth

Allan Sutton

A motorized vehicle truck having a pair of wheel sets each with a live axle and a motor mounted on each axle with its axis parallel to the associated axle. Each motor is secured to prevent its rotation about the respective axle, but since this permits substantially unrestrained horizontal movement of the motors relative to the truck, braces are employed in the form of at least one link which is connected between the respective motor casings and pivotally, resiliently mounted for rotation about a vertical axis positioned between the motor casings. In this way, a stiffness is provided through the motor casing to restrain parallel shear movement of one wheel set horizontally relative to the other.

Motorized railway vehicle truck

Railway vehicle trucks having at least two wheel-sets, each with a live axle mounted in a respective pair of bearings, at least one axle bearing of one wheel-set being elastically interconnected with at least one axle bearing of the other wheelset through bracing structure providing bracing between the wheel-sets. Side frames are connected to respective axle boxes via a primary spring mounting and each side frame is of fabricated construction constituting a bridge member of I-section form which a sub-frame depends, the bridge member and sub-frame defining a space therebetween into which respective side flanges of a bolster project, each said side flange being supported by the respective sub-frame via a secondary spring mountings.

Steering railway vehicle trucks

An active suspension for a vehicle, in particular an active tilting suspension for a railway vehicle, has a first main control loop in which a deficiency signal indicative of the difference actuator response and demand is fed through a low-pass filter to control operation of the actuator. A second control loop derives a restraining signal from actuator operation and this restraining signal is fed through a high-pass filter, which is substantially complementary to the aforesaid low-pass filter, to provide a restraining control on the actuator.

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Mickleover, United Kingdom

Maurice G Pollard