| 摘要 |
PURPOSE:To prevent a stored counted value from being erased even when a power source is turned off by detecting rotations of an automobile wheel, storing the counted value in a mechanical memory, and performing arithmetic on the basis of the counted value and displaying the result. CONSTITUTION:Rotations of the rotating shaft of the automobile wheel are converted by a detection part 1 into the number of rotations and the motor 11 of the memory part 2 is rotated on the basis of the signal corresponding to the number of rotations to rotate a storage wheel 21 by a specific angle through a speed mechanism 12. Then, electric terminals 51-54 contacting a pattern provided on the surface of the storage wheel 21 shift in position and an output signal changes from 0000 to 0001. Thus, the output signal varies with the rotation of the storage wheel 21 and the number of rotations from the beginning to the present point and the number of rotations at some point of time are calculated by an arithmetic part 3 and displayed 4. |
