# How James Plimpton Invented the Modern Roller Skate

> A 19th-century invention that introduced pivoting wheels to roller skates, allowing users to steer by leaning their bodies.

- **Patent:** US 37305
- **Original title:** Improvement in skates
- **Owner:** James L. Plimpton
- **Granted:** 1863
- **Status:** Active
- **Times cited:** 5
- **Field:** mechanical, consumer_electronics

## 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.

## The clever bit

By using a rubber spring or cushion to allow the wheel carriage to tilt and return to center, Plimpton mimicked the natural mechanics of ice skating on dry land.

## Real-world examples

1. Traditional quad roller skates
2. Modern roller derby skates
3. Vintage wooden-wheeled rink skates

## Why it matters

Before this invention, roller skates were essentially straight-line devices that were difficult to control and dangerous to use in social settings. Plimpton's design enabled the creation of roller rinks as a popular leisure activity, as it allowed for graceful, controlled movement in public spaces.

## Frequently asked questions

### What does How James Plimpton Invented the Modern Roller Skate cover?

A 19th-century invention that introduced pivoting wheels to roller skates, allowing users to steer by leaning their bodies.

### Who owns patent US 37305?

James L. Plimpton owns this patent, granted in 1863.

### When does this patent expire?

This patent has expired and is now in the public domain — anyone can use the invention freely.

### What is patent US 37305 cited by?

This patent has been cited by 5 later patents that build on its ideas.

### What problem does this patent solve?

Before this invention, roller skates were essentially straight-line devices that were difficult to control and dangerous to use in social settings. Plimpton's design enabled the creation of roller rinks as a popular leisure activity, as it allowed for graceful, controlled movement in public spaces.

### What does this patent NOT cover?

Does not cover skates with fixed, non-pivoting wheels that can only travel in a straight line.

**Full plain-English explainer:** https://patentbrief.org/patent/us/37305/roller-skates-plimpton

**Original patent:** https://patents.google.com/patent/US37305

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._


## Related patents

Semantically similar inventions in the PatentBrief corpus:

- [How Modern Rollerblades Became Adjustable and Interchangeable](https://patentbrief.org/patent/us/4492385/inline-skates-rollerblade-olson) — A 1982 patent describing a skate design that allows users to swap between wheels and blades and adjust their position on the boot for better performance.
- [How King Gillette Invented the Modern Disposable Safety Razor](https://patentbrief.org/patent/us/775134/safety-razor-gillette) — King Gillette's 1904 patent for a safety razor with a thin, replaceable, double-edged blade that changed how the world shaves.
- [How the QWERTY Keyboard Layout Was Originally Designed](https://patentbrief.org/patent/us/207559/qwerty-typewriter-sholes) — An 1878 patent by Christopher Latham Sholes that helped standardize the keyboard layout we still use on computers and phones today.
- [How Jacob Schick Invented the Modern Magazine-Loading Safety Razor](https://patentbrief.org/patent/us/1721530/schick-repeating-razor) — A 1929 patent for a safety razor that uses a replaceable blade magazine, allowing users to change blades without touching the sharp edges.
- [How the Snurfer Invented Modern Snowboarding](https://patentbrief.org/patent/us/3378274/snowboard-snurfer-poppen) — A 1966 patent for a single-board snow vehicle that allowed riders to stand sideways and steer using a rope, effectively creating the sport of snowboarding.