Abstract: A sheet feed assembly for feeding sheets from a stack comprises a vacuum feed device which is movable to feed a sheet from the stack in the feed direction while the sheet is held on the feed device under vacuum. A sheet holding device is spaced from the vacuum feed device adjacent the stack in use for selectively preventing sheets from being fed from the stack. A control device coupled to the vacuum feed device and to the sheet holding device selectively supplies a vacuum to the vacuum feed device to cause the device to feed a sheet and, at substantially the same time, to deactivate the sheet holding device so as to allow a single sheet to be fed by the vacuum feed device.

Abstract: A fuel pumping apparatus includes a high pressure pump and a low pressure pump which supplies fuel thereto. A further low pressure pump supplies fuel at a pressure which is modified to provide a control pressure which is used to control the delivery quantity of the pump. The pump draws fuel from the lower portion of a reservoir and the pump from the upper portion whereby in the event of fuel starvation the high pressure pump will be starved of fuel before the control pressure is lost.

Abstract: A governor mechanism for controlling the setting of a fuel control member of a fuel pump includes a first lever located about a pivot. One end of the first lever is connected to the fuel control member and the first lever is urged in a direction to reduce the fuel delivered by a centrifugal mechanism. A second lever is engageable by the first lever and is urged in a direction to increase the amount of fuel delivered by a pre-stressed governor spring. The extent of movement of the second lever by the governor spring is limited by a maximum fuel stop and the pivot of the first lever is resiliently located by a spring which as the speed increases allows the pivot to move to increase the maximum amount of fuel which can be supplied by the fuel pump.

Abstract: A fuel injection pumping apparatus has a high pressure pump to which fuel is supplied by a low pressure pump, the output pressure of which is controlled. The high pressure pump includes a piston which controls the timing of the high pressure pump. The pressure applied to the piston is controlled by valve means which includes a valve member biased by a spring. A solenoid is associated with an armature connected to the valve member and when the solenoid is energized the valve member is moved to increase the pressure applied to the piston. The valve member is also subjected to the fuel pressure developed by the low pressure pump and in the event that the flow of current in the solenoid ceases the valve member can move against the spring to allow a controlled pressure to be applied to the piston.

Abstract: A fuel pumping apparatus for supplying fuel to a compression ignition engine includes a low pressure pump having an outlet connected to an air/fuel separation chamber. The chamber is connected to a high pressure pump through a passage. Fuel is supplied to an inlet of the low pressure pump through a first passage formed in a rotary part of the apparatus, the passage extending into a cavity in the apparatus. A fuel supply passage connects with the cavity and a second passage connects the upper part of the cavity with the fuel inlet of the low pressure pump. The second passage incorporates a non-return valve. Air in the cavity is directed by vortex action to the first passage and can be drawn into the low pressure pump and expelled from the separation chamber through a restricted outlet. If too much air collects in the cavity air will be supplied to the high pressure pump and will cause irregular operation of the engine.

Abstract: A fuel injection pumping apparatus includes a rotary distributor member having a transverse bore containing a pumping plunger, a single passage is formed in the distributor member and extends from the bore to the periphery of the distributor member, inlet passages and outlets are formed in the body part and break out into the periphery of the distributor member in a common radial plane. The inlet passages and outlets are alternately positioned around the axis of rotation.

Abstract: A liquid fuel injection pumping apparatus includes a rotary distributor member housed in a sleeve mounted in a body. The distributor member is movable in an axial direction and mounts a pumping plunger in a transverse bore. An inclined surface is formed on the plunger for co-operation to limit the outward movement of the plunger, with an inclined surface on a part in the form of a strip. The strip rotates with the distributor member but is restricted against axial movement. Hence axial movement of the distributor member varies the amount of outward movement of the plunger and hence the amount of fuel which can be supplied by the apparatus.

Abstract: A centrifugal pressure regulator comprises a pair of pistons slidable within a bore and moves in one direction by the action of a coiled spring and by centrifugal force imparted to the pistons as the body in which the bore is located rotates. The outer ends of the two pistons are subjected to the outlet pressure of a pump and the piston adjacent the spring is smaller in diameter than the other piston. The space between the pistons is vented to a drain and in the wall of the bore there is formed a spill port. The smaller of the pistons controls the size of the port which communicates with the outlet of the pump. The outlet pressure of the pump is controlled in accordance with the position of the pistons by spilling fuel through the port, the amount of fuel spilt depending on the effective size of the port.

Abstract: A fuel pumping apparatus includes a housing, a rotary distributor member mounted within the housing and a plurality of outlets formed in the housing and communicating in use, with the injection nozzles of an associated engine. The outlets are divided into at least two axially spaced groups and all the outlets are disposed on one side of a plane including the axis of rotation of the distributor member.