# How the Gatling Gun's Rotating Barrel Mechanism Works

> Richard Gatling's 1862 patent for a multi-barrel firearm that used a hand-cranked rotating mechanism to fire bullets in rapid succession.

- **Patent:** US 36836
- **Original title:** Improvement in revolving battery-guns
- **Owner:** Richard J. Gatling
- **Granted:** 1862
- **Status:** Active
- **Times cited:** 7
- **Field:** mechanical, automotive

## What it does

The patent describes a mechanical system where multiple barrels are arranged around a central shaft. As the operator turns a hand crank, the barrels rotate, and a cam-driven system loads, fires, and extracts cartridges sequentially. This design allowed for a much higher rate of fire than single-shot rifles, as each barrel had time to cool while the others were being cycled.

## What it does NOT cover

- Does not cover automatic weapons that use gas pressure or recoil to cycle the action
- Does not cover single-barrel repeating firearms like lever-action rifles
- Does not cover electronic or motorized firing systems

## The clever bit

By using a rotating cluster of barrels, the design solved the problem of barrel overheating, which would have caused a single barrel to melt or jam during continuous rapid fire.

## Real-world examples

1. Gatling Gun
2. Modern rotary cannons like the M61 Vulcan

## Why it matters

This invention fundamentally changed infantry tactics by introducing the concept of sustained suppressive fire. It served as the precursor to modern machine guns and influenced military doctrine for over a century.

## Frequently asked questions

### What does How the Gatling Gun's Rotating Barrel Mechanism Works cover?

Richard Gatling's 1862 patent for a multi-barrel firearm that used a hand-cranked rotating mechanism to fire bullets in rapid succession.

### Who owns patent US 36836?

Richard J. Gatling owns this patent, granted in 1862.

### 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 36836 cited by?

This patent has been cited by 7 later patents that build on its ideas.

### What problem does this patent solve?

This invention fundamentally changed infantry tactics by introducing the concept of sustained suppressive fire. It served as the precursor to modern machine guns and influenced military doctrine for over a century.

### What does this patent NOT cover?

Does not cover automatic weapons that use gas pressure or recoil to cycle the action

**Full plain-English explainer:** https://patentbrief.org/patent/us/36836/gatling-gun

**Original patent:** https://patents.google.com/patent/US36836

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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:

- [Samuel Colt's Early Revolving Firearm Mechanism](https://patentbrief.org/patent/us/1304/colt-revolver) — An 1839 patent by Samuel Colt describing early improvements to the mechanical design of revolving firearms.
- [How the Revolving Door Was Invented](https://patentbrief.org/patent/us/387571/revolving-door-van-kannel) — The 1888 patent for the revolving door, designed to keep buildings warm while allowing people to enter and exit easily.
- [How Joseph Glidden Invented Modern Barbed Wire](https://patentbrief.org/patent/us/157124/barbed-wire-glidden) — A 1874 patent for a specific wire-fence design that used twisted strands to hold sharp barbs in place, fundamentally changing how the American West was fenced.
- [George Westinghouse's Original Steam-Powered Train Brake](https://patentbrief.org/patent/us/88929/air-brake-westinghouse) — An 1869 invention by George Westinghouse that used steam pressure to operate train brakes, replacing manual hand-cranked systems with a safer, centralized control mechanism.
- [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.