Abstract: A fuel delivery meter for measuring and indicating the quantity of fuel delivered by engine fuel injection means "on test" comprising a chamber for receiving the fuel, a spring-loaded piston or plunger within the chamber which is displaced as fuel enters the chamber, indicating means which are actuated by displacement of the piston or plunger to give a reading which corresponds to the amount of fuel which has entered the chamber, and fuel flow means for passing fuel into the chamber on the other side of the piston or plunger so as to warm the meter.

Abstract: Apparatus for measuring smoke density comprising a venturi passage through which smoke can pass, and a light source and at least one light-reflecting surface arranged in the vicinity of the passage to pass and reflect a light beam transversely through the throat of the venturi to form a V-shaped or multiple V-shaped beam.

Abstract: Apparatus for testing fuel injectors having their own in-built high pressure pump, the said apparatus comprising means for locating and clamping an injector on the apparatus, and a composite fuel system for supplying fuel to the injector and to different parts of the apparatus, the said fuel system including at least one valve having at least one weight acting on it to produce fuel at a pressure determined by that weight.

Abstract: Apparatus for testing fuel injectors having their own in-built high pressure pump, the said apparatus comprising: removable motion-transmitting means adapted to engage and actuate the high pressure pump of an injector to be tested on the apparatus, driving means comprising a cam-shaft and a motor driving said cam-shaft for imparting motion to said motion-transmitting means, a fuel-collecting nose assembly to receive the nozzle end of an injector to be tested, and an hydraulic clamp for engaging and thus clamping the nozzle end of the injector into the said fuel-collecting nose assembly, the said motion-transmitting means serving also as a positioning means for positioning an injector when the latter is fitted on the apparatus for testing.

Abstract: Apparatus for testing fuel injectors having their own in-built high pressure pump, the apparatus comprising means for axially locating and clamping an injector to be tested on the apparatus, a fuel arm assembly for supplying fuel to an inlet on the injector, and means for mounting the said fuel arm assembly for swinging movement into and out of a fuel-supplying position, the said fuel arm assembly including a valve adapted to make sealing contact with the injector outlet and a spring for urging the said valve into a closed position, the valve being pushed into its fuel-supplying position, against the action of the said spring, when the valve makes sealing contact with the injector inlet.