| 摘要 |
To position an electrical insulator, having first and second ends at which are first and second sideways-projecting lugs, so that a part of the insulator lies on the upper face of a rail flange, another part of the insulator lies between the rail flange and a neighboring upward projection, and the upward projection lies partly between the lugs, the insulator is held in an inclined position by gripping its upper end between two clamping parts and moved with a component of motion parallel to the rail until the lower lug catches on the upward projection. Continued movement of the clamping parts cannot be followed by the insulator, which changes its orientation and prises the clamping parts apart. They release it and the higher end of the insulator descends, possibly as a consequence of force exerted on it by a clip. The clamping parts may be mounted on a magazine containing rail clips.
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