Abstract: In this method and apparatus for the wireless control of a lift device and, in particular, of a traveling crane, a plurality of transmitting units communicate by infrared transmission of data telegrams to a receiving unit associated with the crane. The data telegrams include an integrated address signal that is unique to each transmitting unit and is stored in a memory module of the transmitting unit. The receiving unit decodes the data telegram and, if the crane is not then in use, stores the address signal in a comparison circuit of the receiving unit. Only subsequently-received data telegrams incorporating the stored address signal are passed to the crane for controlling the crane, thereby assuring that a user not then in control of a crane operation cannot interfere with its operation.

Abstract: In a switch, a straight rail section (3) is movable with respect to a stationary rail (1). The straight rail section (3) is connected via a bracket (5) to a movable switch base plate (6) which is guided by travel wheels (7) in travel or running rails (12) and by guide rollers (8) in guide rails (13) of lateral profiled sections (9). The lateral profiled sections are connected to each other by intermediate profiled sections (11) forming a support plate (10).

Abstract: A printer includes a platen (3), a print head (7) and a front carriage guide shaft (4) for supporting the print head and adjustable for selectively varying the print head-to-platen spacing. The guide shaft is mounted to the printer frame by an eccentric (11) and a setting lever (12) secured to the eccentric is selectively movable for adjusting the print head-to-platen spacing. A detent plate (13) is mounted to the printer frame (1, 2) and carries stops (14, 15) for limiting movement of the setting lever and, therefore, the print head-to-platen spacing adjustment. Releaseably engageable lock elements (16) on the detent plate and frame provide relative adjustability and retention of the position of the detent plate on the frame for setting the position of the front limit stop (15) and, thereby, the minimum permitted print head-to-platen spacing obtainable through movement of the setting lever.