Henry Deringer’s Remarkable Percussion Pocket Pistols

Published on April 15, 2026
Duration: 13:11

This video from Forgotten Weapons explores the history and technical aspects of Henry Deringer's percussion pocket pistols. Ian McCollum details Deringer's career, the transition from flintlock to percussion, and the design features that made these pistols popular defensive tools. The discussion covers their mechanical operation, common calibers and barrel lengths, and the significant impact of Deringer's brand, even leading to trademark infringement lawsuits over counterfeit models.

Quick Summary

Henry Deringer (1786-1868) was a Philadelphia gunsmith whose percussion pocket pistols became so popular that his name became a generic term for this class of firearm. These compact, single-shot, muzzle-loading pistols, often chambered in .41 caliber, were highly effective defensive weapons in the mid-1800s.

Chapters

  1. 00:04Introduction to Deringer Pistols
  2. 00:16Historical Significance and Popularity
  3. 00:40The Origin of the 'Derringer' Name
  4. 01:08Henry Deringer's Biography and Career
  5. 01:43Evolution from Flintlock to Percussion
  6. 02:14Development of Small Civilian Pocket Pistols
  7. 02:37Civilian vs. Martial Pistols
  8. 02:45Advantages of Percussion for Pocket Pistols
  9. 03:16Defensive Carry Weapon
  10. 03:31Demand and Sales Agents
  11. 04:06Mechanical Operation of the Pistol
  12. 04:13Loading and Firing Procedure
  13. 04:43Caliber and Customization Options
  14. 05:02Barrel Length Variations
  15. 05:15Sold in Pairs
  16. 05:25Embellishment and Quality
  17. 05:54Examples for Sales Agents
  18. 06:24John Wilkes Booth's Deringer
  19. 06:36Ballistics and Performance
  20. 07:24Intended Use and Lethality
  21. 07:40Supply and Demand Issues
  22. 07:53The AJ Platt Counterfeit Case
  23. 08:13No Patents, Free to Copy
  24. 08:27Counterfeiters Go Too Far
  25. 08:37Deringer Discovers Counterfeits
  26. 09:07Trademark Infringement Lawsuit
  27. 09:30Platt's Defense and Court Decision
  28. 10:26Platt's Humorous Response
  29. 10:42The 'Deringer' Spelling Debate
  30. 11:20Licensing a Different Deringer
  31. 11:49Technically Legal Counterfeits
  32. 12:11Henry Deringer's Later Years and Death
  33. 12:40Legacy of the Spelling Variations
  34. 12:53Conclusion and Thanks

Frequently Asked Questions

Who was Henry Deringer and why are his pistols famous?

Henry Deringer (1786-1868) was a Philadelphia gunsmith renowned for his percussion pocket pistols. His firearms became so popular that 'derringer' became a generic term for this type of compact handgun, a testament to his brand's influence and success.

What made Deringer's percussion pocket pistols so popular in the mid-1800s?

The advent of the percussion cap system in the mid-1820s made small, single-shot pocket pistols like Deringer's feasible and convenient. They were reliable, well-made, and served as popular defensive weapons, effectively replacing short swords for civilian carry.

What were the typical specifications of a Henry Deringer pistol?

Deringer's pistols were typically single-shot, muzzle-loading percussion firearms. Common calibers were around .41, though options ranged from .31 to .50. Barrel lengths also varied, from just over an inch to 4 inches or more, and they were often rifled.

Why is the spelling of 'Deringer' often seen with two 'r's?

The common misspelling of 'Deringer' (with two 'r's) arose from counterfeiters. After Henry Deringer sued a distributor for using his name on unauthorized copies, the distributor licensed the name of a different Deringer, leading to the widespread use of the double-'r' spelling.

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