| 摘要 |
A signal device for providing a quick visual indication of the remaining wear life of a gravity responsive slack adjusting wedge in a slackless drawbar coupler arrangement, which comprises a lifting lug secured to an upper surface of the gravity responsive slack adjusting wedge, such that the lifting lug extends visibly through an opening formed in an upper surface of a railway vehicle center sill member as long as the gravity responsive slack adjusting wedge has a useful remaining life, the extent of visibility of the lifting lug being indicative of the useful remaining life.
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