Abstract: There is described a valve arrangement which in one form is an inlet valve (60) or in another form is a dual flush valve (2). The valves may be used in a variety of situations but find particular application in a cistern for providing water to flush a toilet bowl or similar. The valve arrangement (2) comprises a flushing tube (100) or a pair of flushing tubes (14, 18) which can move axially. One end of the tubes (100, 18) is sealed to an outlet (9). The tubes are provided with rings or collars (16, 22) which co-operatively engage with locking edges (48, 50) of floats (40, 44) to control movement of the tubes (100, 14, 18). The floats (40, 44) are mounted off-center or in a position spaced apart from their respective centers of gravity so that they are free to move under the effects of gravity and the effects of lift provided by buoyancy of the floats.

Abstract: A device for discouraging theft of a bicycle includes a first tube member attached to the bicycle handlebar and a second tube member attached to the bicycle fork. One of the tube members has apertures carrying rolling bodies, and the other of the tube members has recesses for receiving the rolling bodies. The tube members are concentrically rotatable. A cam member is provided for urging the rolling bodies into the recesses to fix the tube members against relative rotation, thereby enabling steering of the bicycle. The cam member is operable to a position wherein the rolling bodies are free to become retracted into the apertures, thereby decoupling the tube members and disabling steering of the bicycle.