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Handbrake
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- A mechanical device to secure a rail vehicle against movement. includes spring parking brakes.
- Brake operated by a hand lever. a parking brake.
- Nowadays synonymous with the term parking brake but originally a vehicle brake applied by hand action to a wheel or lever on the vehicle. see also the brakes page.
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Mechanical, английский
Originally, английский
Первоначально
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Mechanical insulated joint, английский
A mechanical joint incorporating insulating channels, ferrules and end posts designed to electrically insulate the joined rails
Bolt hole elongation, английский
A mechanical compression or damage at a bolt hole arising from interaction with the bolt. the hole becomes oval with the resultant metal flow concentrating stress. this defect may progress to a bolt hole crack if at a rail end. a horizontal split web may develop in a welded rail if the defect is not removed. as bolt hole defects are normally associated with fishplated joints, visual detection may only be possible after removal of plates.
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