"limit switch" meaning in English

{
  "forms": [
    {
      "form": "limit switches",
      "tags": [
        "plural"
      ]
    }
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  "head_templates": [
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      "expansion": "limit switch (plural limit switches)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
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          "langcode": "en",
          "name": "Electrical engineering",
          "orig": "en:Electrical engineering",
          "parents": [],
          "source": "w"
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          "ref": "1956 May, “London Transport Diesel-Electric Cranes”, in Railway Magazine, page 338:",
          "text": "Limit switches are provided in the hoisting motion, and in the derricking motion, to limit the amount of travel in both directions.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Originally, a device used to define the limit of travel of an object."
      ],
      "id": "en-limit_switch-en-noun-9UqDI~CC",
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering) Originally, a device used to define the limit of travel of an object."
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "limit switch"
}

{
  "forms": [
    {
      "form": "limit switches",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es"
      },
      "expansion": "limit switch (plural limit switches)",
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  "lang_code": "en",
  "pos": "noun",
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          ],
          "ref": "1956 May, “London Transport Diesel-Electric Cranes”, in Railway Magazine, page 338:",
          "text": "Limit switches are provided in the hoisting motion, and in the derricking motion, to limit the amount of travel in both directions.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Originally, a device used to define the limit of travel of an object."
      ],
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering) Originally, a device used to define the limit of travel of an object."
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "limit switch"
}