Somersault signal

{
  "id": "MLC-T-IND-005466",
  "term": "Somersault signal",
  "field": "Industrial and trades",
  "definition": "An early type of railway semaphore signal where the arm pivots near its center, allowing it to 'somersault' from the horizontal 'stop' position to a downward-angled 'clear' position. This design was intended to prevent false clear indications if the arm broke. It was largely superseded by lower-quadrant and upper-quadrant semaphore signals.",
  "subject": "Rail equipment",
  "translations": {
    "de": "Purzelbaum-Signal",
    "es": "señal de voltereta",
    "fr": "signal culbuteur"
  },
  "url": "https://mlchart.com/terminology/industrial/somersault-signal/"
}