| 摘要 |
PURPOSE:To eliminate inconvenience of locking by a key, by a method of electric locking wherein the lock is released by pushing the buttons of predetermined numbers in the predetermined order, and is electrically set by pushing one of the buttons other than the predetermined numbers. CONSTITUTION:For example, the number to release the electric locking is determined as 572. In releasing the locking, first, the button 6 for the figure 5 is pushed to close the contact 16, causing the power supply 43 to connect with the coil 36 of the relay 32, and to operate the relay 2 to close the contacts 23 and 24. Accordingly, the operation of the relay 32 is self-held, at the same time, the line voltage reaches the contact 18a of the button 8 for the figure 7. Next, with the button 8 for the figure 7 pushed to close the contact 18, the relay 33 is operated and is self-held in its operated condition in the same manner, and the line voltage reaches the contact 13a of the button 3 for the figure 2. Further, by pushing the button 3 and closing the contact 13, the relay 31 is operated and self-held in its operanted condition as well, and by closing the contact 22, the relay 34 is operated to close the contact 27, therefore, the electric locking is released. On the other hand, pushing out of the buttons other than for the figure 572 causes the relative contact to open, and the line voltage to the respective relay to cut off, therefore, the locking is set electrically. |
