{
  "patent_number": "US 3723796",
  "country": "US",
  "title": "How a Single Coil Powers Multiple Motor Armatures Simultaneously",
  "original_title": "Multi-armature motor",
  "summary": "A 1973 design for an electric motor that uses a single central coil to power several separate armatures arranged in a circle.",
  "what_it_does": "This patent describes a motor assembly where multiple armatures are placed in a circular pattern between two disks. These disks have interlocking finger-like projections that act as magnetic poles. A single central electromagnetic coil sits between the disks, creating a magnetic field that flows through these fingers to drive all the armatures at once. Essentially, it allows one power source to run multiple rotating parts simultaneously within a compact, integrated housing.",
  "what_it_does_not_cover": [
    "Does not cover motors using permanent magnets instead of an electromagnetic coil.",
    "Does not cover linear motors where the armatures move in a straight line.",
    "Does not cover single-armature motors.",
    "Does not cover motors where the armatures are not arranged in a circular, parallel array."
  ],
  "filed": "1972-03-20",
  "granted": "1973-03-27",
  "expires": "1992-03-20",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "E Mason",
      "url": "https://patentbrief.org/inventor/e-mason"
    }
  ],
  "times_cited": 22,
  "tags": [
    "mechanical",
    "energy"
  ],
  "abstract": "A plurality of armatures are supported in parallel spaced relation in a circular array between interdigitated magnetic pole pieces energized by a central coil.",
  "url": "https://patentbrief.org/patent/us/3723796/mri-cancer-tissue-detection",
  "markdown_url": "https://patentbrief.org/patent/us/3723796/mri-cancer-tissue-detection/md",
  "google_patents_url": "https://patents.google.com/patent/US3723796",
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}