Locking frame

{
  "id": "MLC-T-IND-003398",
  "term": "Locking frame",
  "field": "Industrial and trades",
  "definition": "A mechanical apparatus in a signal box that connects levers controlling signals and switches, preventing conflicting movements. It consists of a grid of interlocking bars and tappets that physically restrict a signal operator from setting a hazardous route. The Saxby and Farmer design became a widespread standard for these mechanical interlocking systems.",
  "subject": "Rail equipment",
  "translations": {
    "de": "Verschließungsrahmen",
    "es": "bastidor de enclavamiento",
    "fr": "châssis d'enclenchement"
  },
  "url": "https://mlchart.com/terminology/industrial/locking-frame/"
}