Abstract: The mechanical loom includes a drive unit for a shaft of a device from a leno selvedge and is synchronized with the frames of a mechanical loom. The drive unit comprises a first electromotor and a second electromotor. The drive shaft (111) is actrated by the first electromotor (110) (driving motor) and is electrically coupled with the second electromotor (120) driven by the driven shaft (121) of the mechanical loom, by at least two phases of alternating current waveforms carried by two or three electric transmission wires coupling the first and second electromotors together.

Abstract: Half heald of a leno selvedge with lifting healds, whereas the half heald has two arms that may be joined together on their upper end so as to form a head and that are provided on their lower end with a foot, whereas the foot is magnetically co-operating with the at least one magnet of the lifting heald, and whereas the foot (70, 80) of the half heald (50) is given a shape that allows the magnetic force exerted onto the foot of the half heald in the stroke direction (arrow 100) of the lifting healds (2, 3) to be smaller than in the reverse direction, whereas the foot (70, 80) is provided with an upper end being designed as a border (71, 81) so that the half heald (59) is alternately magnetically brakable by the lifting healds (2, 3).

Abstract: A mosaic arrangement of switch elements, especially electrical push-button switches with quadratic or square switch bodies, arranged at the front surface or side of electrical switch panels and the like, wherein the switch bodies possess at their edge corners extending perpendicular to the front surface of the switch panel recesses which at least over a portion of the length of the corners are constructed as guide grooves, and wherein at least partially at the crossover locations or intersection of the mosaic arrangement of the switch elements, there are provided coupling elements having four corner noses each of which engages in the guide groove of a respective switch body for insertion in the neighboring recesses of the switch bodies bounding at such crossover or intersection locations.