Abstract: The height-adjustable table (22) comprises a base (1), a support (3) to hold a table top (21), a movable connecting element (2) which mounts the support (3) in a height-adjustable manner in relation to the base (1) and a pneumatic, pressure actuated weight counterbalancing element (7) which is fluidly connected to a reservoir (4) and is arranged between the base (1) and the support (3) in such a way that a reaction force is generated to counteract a gravitational force G acting on the support (3). The weight counterbalancing element (7) and the reservoir form a closed volume containing fluid.

Abstract: A photographic copying apparatus for the processing of lengths of copy masters adhesively bonded into long strips, in particular negative film strips that may be wound onto film spools, comprises an exposure station located along a transport path of the negative film strip, wherein the negative film strip is exposed master by master onto an unexposed photographic copy material, in particular unexposed photographic paper, passed along a paper path extending within the copy apparatus, preferably under the film transport path, through the exposure station. The copy apparatus is equipped with two supply spools located on the inlet side of the photographic copy apparatus from which the negative film strip may be wound off selectively, and with two winding spools located on the outlet side of the copy apparatus onto which the negative film strip may be selectively wound after each passage through the copy apparatus.

Abstract: Within a housing of a multi-position switch there is arranged a forwardly and backwardly indexible stepping mechanism comprising two actuation elements which can be individually brought into engagement with a pinion of a character support or carrier by accomplishing a linear working movement. Each actuation element comprises a push-button, a switching or indexing element and a preferably hairpin-shaped spring element, or is operatively connected with a coil spring mounted in the housing. By means of each push-button the related actuation element is moved in a first direction, whereby its switching element, guided by a first pin along a cam or equivalent structure, is deflected, and a second pin comes into engagement with the pinion, so that this pinion, which is rotatably mounted upon a shaft, can be moved in a predetermined direction against the restoring force of a latching spring engaging into a tooth gap of the pinion by means of a latching cam or nose.