| 摘要 |
FIELD: clock mechanisms, namely calendar devices with modular structure in the form of everlasting calendar driven by means of gear wheel performing one revolution per day. ^ SUBSTANCE: calendar device that may be mounted in clock mechanism to be driven by means of gear wheel performing one revolution per 24 hours includes two indicating discs with toothed rims for indicating units of day and decades of month; program carrier provided with toothed rim that performs one revolution per 31 days; arresting spring engaged with toothed rim. According to invention calendar device includes in addition two stop members of indicating discs controlled by means of program carrier in such a way that at those days when there is danger of rotation of indicating discs, said stop members are inserted into toothed rim of respective indicating disc and removed out of it in order to prevent rotation of disc. ^ EFFECT: improved design of calendar device preventing rotation of indicating discs without significant influence upon duration and accuracy of clock running. ^ 4 cl, 7 dwg |
