| 摘要 |
The safeguard device has a light beam emitter secured to a pivotal lever for movement between an operative position and a retracted position. In addition, a plate is pivotally mounted relative to the lever to move with the lever. The plate is formed with a recess to expose the light beam when the lever is in an operative position and is otherwise shaped to mask the emitter when the lever is pivoted into a retracted position. Masking of the light beam serves to signal a need for interrupting the operation of the weaving machine.
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