Abstract: A height adjustable work plate, particularly for sewing machine tables, including a carriage supporting the work plate and being slidably guided on a vertical frame structure, wherein the work plate is assisted by a pneumatic spring provided at its upper end with a pulley over which a rope is trained, one end of the rope being attached to the frame and the other end to the carriage.

Abstract: The invention relates to a furniture fitting having a grooved loop-shaped guideway for guiding an equipment supporting plate in a generally vertical direction and locking it in at least two positions at different elevations. Means are provided for preventing a guide pin from entering at least one of the two guideway branches from the undesired direction. The invention resides in the sections (28, 35, 40, 29, 51, 52, 48) of the grooved guideway being provided with steps having steeply rising surfaces (33, 38, 41, 43, 53), the pin end (32) moving in the grooved guideway being urged against the bottom of the groove by spring means (21, 62), and the rising surfaces of the steps forming stops for the pin end (32) in one direction of movement.