| 摘要 |
Methods of operating, and apparatus including, a rotary electric motor to translate rotation of the motor into linear travel with the aid of a linearly traveling device. This linearly traveling device is restrained against rotation at points peripherally distributed relative to the device. In particular, there is a pair of interfitting parts including a linear keyplate and keyway at each of the peripherally distributed points. One of these interfitting parts is connected to the linearly traveling device and the other of these parts is maintained stationary relative to that one interfitting part. One of the linear keyplates may be provided with a first scale indicating the linear travel in a first system of measurement, such as the metric system, and another linear keyplate may be provided with a second scale indicating the linear travel in a second system of measurement, different from the first or metric system.
|
