Time switch providing daily and weakly cycle - uses alternate switching discs driven by different cogs of common drive wheel

摘要

The switch uses a weekday disc or an interchangeable 24 hour disc (5). Both discs have cursors moved along their periphery to allow operation of switch contacts at required times and each is driven via a rotary drive wheel (2). This has two drive cogs (2a,2b) with a 7:1 transfer ratio, respectively cooperating with drive teeth (5a) around the underneath of the 24 hour disc (5) or the weekday disc. A single reversible disc (5) may be used, marked on one side with a 24 hour cycle and on the other side with a weekly cycle, the respective drive teeth (5a) cooperating with the drive cogs (2a,2b) being provided on the opposite side. The disc (5) is secured to the rotary axis (4) via a clip (8), fitting into an annular groove (9) of the disc (5).