{
  "patent_number": "US 37305",
  "country": "US",
  "title": "How James Plimpton Invented the Modern Roller Skate",
  "original_title": "Improvement in skates",
  "summary": "A 19th-century invention that introduced pivoting wheels to roller skates, allowing users to steer by leaning their bodies.",
  "what_it_does": "The patent describes a mechanism where the wheels of a skate are mounted on a pivoting carriage. When the skater leans to one side, the carriage tilts, causing the axles to angle inward. This geometry forces the skate to follow a curved path, effectively allowing the user to steer like a bicycle or a modern skateboard truck.",
  "what_it_does_not_cover": [
    "Does not cover skates with fixed, non-pivoting wheels that can only travel in a straight line.",
    "Does not cover motorized or electric propulsion systems.",
    "Does not cover the use of ball bearings, which were not standard in this design."
  ],
  "filed": null,
  "granted": "1863-01-06",
  "expires": null,
  "status": "active",
  "holder": "James L. Plimpton",
  "holder_url": "https://patentbrief.org/company/james-l-plimpton",
  "inventors": [],
  "times_cited": 5,
  "tags": [
    "mechanical",
    "consumer_electronics"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/37305/roller-skates-plimpton",
  "markdown_url": "https://patentbrief.org/patent/us/37305/roller-skates-plimpton/md",
  "google_patents_url": "https://patents.google.com/patent/US37305",
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}