Abstract: A spring loaded vehicle seat is of the kind having a seat frame and an underframe supports this seat frame by levers and a pneumatic spring so that the seat is maintained at a constant height. Valves control the flow of air to and from the spring to counteract the effect of vibrations. A switch mechanism controls the operation of the valves and a coupling device transmits vibrations of the seat to the mechanism. The coupling device is arranged so that movement of the mechanism after opening a valve lags behind the vibration of the seat.

Abstract: An adjustment indicator for rotary spindles, comprising a hollow and at least partly transparent handwheel for operating the rotary spindle, and an indicator device disposed in the handwheel, the indicator device providing a reading which is controlled as a function of the revolutions of the rotary spindle.

Abstract: Furniture assemblies comprising at least two sets of elongated structural members adapted to be selectively arranged in a desired combination. The members of one set are provided with longitudinal grooves while the members of the other set are provided with longitudinal tongues adapted to fit in the grooves. Each of the structural members is provided with at least one hole extending perpendicularly through the respective groove and tongues when assembled together. An anchor bolt is provided for joining the members together. The anchor bolt has a head at one end and a shank adapted to extend through the mating holes. The bolt is held by locking means which removably engage the shank of the bolt and secure the bolt under tension within the hole. The locking means comprises an eccentric bushing adapted to fit in the blind bore and engage the wall of the bore as it pulls on the shank of the bolt.