| 摘要 |
FIELD: electricity.SUBSTANCE: invention pertains to electrical engineering and can be used in dental, jeweller's and beauty therapy equipment. A micro motor control device is designed to change its rotational speed by a speed governor (19) and equipped with a pointer (1) of the maximum permitted rotational speed for the micro motor tool made as a scale with a diameter of its operating part divided into intervals (2-13), and the marking of the above intervals is identical to the speed governor (19).EFFECT: provision of the maximum safe rotational speed of the tool depending on the diameter of its operating part.4 dwg |
