| 摘要 |
The liquid cristal display cell (21) indicates the day of the month in a wicket located on 12 hours. The wheel of the hours (31) and the wheel of the minutes (29) have coaxial barrels which traverse the dial and carry the hour and minute hands. Said wheels are driven by works (30, 28, 27) actuated by the stepping motor (25) which receives its pulses from the circuit (23) at a frequency of 1 Hz for example by the quartz cristal (48). The 24-hour wheel (33) carries a contact element (46) which, once every round of the dial, grounds the terminal (47). The resulting pulse is transmitted to a counter incorporated to the circuit (23). This counter acts on the decoding circuit which controls the display cell (21). For setting the right date, the rod (35) is brought to its intermediary position (II). The contact element (40) carried by the flip-flop (38) grounds the terminal (41) thereby causing in the circuit (23) the transmission of pulses at a frequency of 1 Hz which operate a repeated and fast date change. |
