"vacuum brake" meaning in English

{
  "forms": [
    {
      "form": "vacuum brakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vacuum brake (plural vacuum brakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1951 January, “Diesel-Electric Branch-Line Locomotive for British Railways”, in Railway Magazine, page 71",
          "text": "Compressed air is used for the operation of certain contactors, the sanders, the horn, and the re-fuelling equipment, but vacuum brakes are fitted to the locomotive.",
          "type": "quotation"
        },
        {
          "ref": "1963 January, “A second chance on brakes”, in Modern Railways, page 1",
          "text": "Consideration of recent pronouncements and predictions shows second thoughts to be practicable, in particular, on the technical decision for which the previous B.T.C. regime was most hotly criticised by experts - the adoption of the vacuum brake as standard for the modernised British Railways. [...] The original decision to retain the vacuum brake was justified largely on grounds of the intolerable operating convenience that would ensue from a changeover.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive."
      ],
      "id": "en-vacuum_brake-en-noun-Rjt4Tcka",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "brake",
          "brake"
        ],
        [
          "train",
          "train"
        ],
        [
          "pipe",
          "pipe"
        ],
        [
          "ejector",
          "ejector"
        ],
        [
          "pump",
          "pump"
        ],
        [
          "locomotive",
          "locomotive"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "vacuum brake"
      ]
    }
  ],
  "word": "vacuum brake"
}

{
  "forms": [
    {
      "form": "vacuum brakes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vacuum brake (plural vacuum brakes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1951 January, “Diesel-Electric Branch-Line Locomotive for British Railways”, in Railway Magazine, page 71",
          "text": "Compressed air is used for the operation of certain contactors, the sanders, the horn, and the re-fuelling equipment, but vacuum brakes are fitted to the locomotive.",
          "type": "quotation"
        },
        {
          "ref": "1963 January, “A second chance on brakes”, in Modern Railways, page 1",
          "text": "Consideration of recent pronouncements and predictions shows second thoughts to be practicable, in particular, on the technical decision for which the previous B.T.C. regime was most hotly criticised by experts - the adoption of the vacuum brake as standard for the modernised British Railways. [...] The original decision to retain the vacuum brake was justified largely on grounds of the intolerable operating convenience that would ensue from a changeover.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "brake",
          "brake"
        ],
        [
          "train",
          "train"
        ],
        [
          "pipe",
          "pipe"
        ],
        [
          "ejector",
          "ejector"
        ],
        [
          "pump",
          "pump"
        ],
        [
          "locomotive",
          "locomotive"
        ]
      ],
      "raw_glosses": [
        "(rail transport) A brake used on trains, working on the principle of keeping up a vacuum in a continuous pipe or pipes extending under the train, and in brake-cylinders connected to them under each vehicle, the air being sucked out by ejectors or pumps on the locomotive."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ],
      "wikipedia": [
        "vacuum brake"
      ]
    }
  ],
  "word": "vacuum brake"
}