| 摘要 |
<p>In circular saws, especially of the so-called cold type, for steel and nonferrous metals, there is a certain play in the gear drive or power transmission between the prime mover such as an electric motor and the saw blade proper. Especially during the start and during the completion of a sawing operation such play causes a temporary stopping of the blade. To avoid such play a brake mechanism with blade engaging brake shoes is provided which is energized and de-energized in response to the current consumption of the electric saw drive motor or in response to position responsive switch means, whereby the brake is effective during the start and during the stopping of the saw blade.</p> |
