| 摘要 |
<p>A cam controlled mechanism is used to provide changeover of a calendar at each months end. The system is based upon two coupled cam discs (11) that perform two revolutions per year. Each cam has six lobes that operate a double lever mechanism (5, 8). One lever (5) is spring controlled (7) between a stop (a) and a point on the lever. The lever is centred on a fixed pivot. The second lever (8) is pivoted (9) on the first and a spring controls relative movement. Operation of the cam lobe against the lever results in a changeover switch (1) being actuated.</p> |
