| 摘要 |
PURPOSE:To readily divide hours other than 24 hours by 24 to make a umit time and make possible time displaying by changing the frequency dividing ratio of an electronic circuit with an external operating switch. CONSTITUTION:The watch is constituted by an oscillation circuit 1, frequency dividing circuit 2, pulse generating circuit 3, frequency dividing circuit 4, 5-second hand operating pulse generating circuit 5, changeover circuit 6, switching driving pulse generating circuit 7, switch circuits 8, 9 and switches S1, S2. In an ordinary state where 1 day 24 hourse are divided by 24, S1 is held turned OFF. If S1 is turned ON, the signals are sent from the 5-second hand operating pulse generating circuit 5 past the changeover circuit 6 to the switching driving pulse generating circuit 7 and a switching motor M performs operation differing from ordinary one wherein 5 steps are made 1 unit. 2<n>Hz is inputted to the pulse generating circuit 3 from the frequency dividing circuit 2, then either of the combinations lower or higher than 2<n>Hz is selected by S2 and circuit 9, thus the time reference signal differing from ordinary one wherein 2nHz is a reference signal is formed. |
