This blog article reveals the true origin of the rolling knife sharpener, tracing its invention back to Willis F. Thompson in 1949. Through extensive research of patents and historical records, it debunks claims of originality by modern companies and highlights the evolution of the design, including contributions by Thompson’s son, a World War II hero. The story underscores the importance of intellectual property and innovation in knife sharpening tools.
The True Origin of the Rolling Knife Sharpener: Unveiling the Original Inventor and Patent History
Detailed Analysis:
Millions of knife enthusiasts and professionals use rolling knife sharpeners today, but few know the true origin of this handy tool. Despite claims by some companies to be the original inventors, extensive research reveals a different story. This article dives deep into the history, patents, and genealogy behind the rolling knife sharpener, uncovering the original inventor and the evolution of the design.
The rolling knife sharpener is a device that sharpens blades by placing the blade against or inside the sharpener and rolling it back and forth. While many modern companies claim to have invented the original rolling knife sharpener, this is not the case. The original concept and patent date back many decades before these claims.
The Research Journey
After hundreds of hours of research, including searches through the United States Patent and Trademark Office and the European Patent Office, the original rolling knife sharpener was identified. The research also involved examining historical patents dating back to the late 19th century and tracing the genealogy of the inventor.
The research was independent and not sponsored by any company. It was motivated by curiosity and a desire to uncover the truth behind the claims of originality made by some companies.
The European Patent Reference
A European patent (EP 99382 A1) filed in 1983 and granted in 1986 references the original US patent for the rolling knife sharpener. This patent describes a device with two rollers having conical tooth rings with abrasive material, where the blade is inserted between the toothed crowns and sharpened by rolling the sharpener on its support.
This European patent acknowledges the existence of an earlier US patent, confirming that the invention originated in the United States.
Challenges of International Patents
International patents are difficult to enforce, especially for individual inventors or small companies. While some countries protect intellectual property well, others do not, making it challenging to prevent knockoffs. For example, products copied in China are hard to legally challenge, although platforms like Alibaba can sometimes be used to remove infringing listings.
Historical Patents and Publications
The patents cited in the European filing include publications dating back to 1891, as well as US patents from 1946, 1948, 1958, 1960, 1969, and 1976. These references show a long history of development in knife sharpening technology.
Willis F. Thompson: The Original Inventor
The original rolling knife sharpener was invented by Willis F. Thompson (also known as W.F. Thompson). He filed the patent in the mid-1940s, with the patent granted in 1949 (Patent Number 2469797).
About Willis F. Thompson
– Born: May 1900, Portland, Cumberland, Maine
– Parents: Lyman Rogers Thompson and L. Maor
– Married Lilan May Johnson in 1925
– Children: Nathan Lyman Thompson (1926–1979) and Colonel Nelson L. Thompson (1927–2014)
– Died: July 20, 1974
Willis F. Thompson’s invention was a blade sharpener with a rotatable sharpening unit mounted in a support, allowing a knife blade to be sharpened by reciprocating it against an abrasive wheel.
The Legacy Continued by Nelson L. Thompson
Willis’s son, Colonel Nelson L. Thompson, was a decorated World War II hero who carried forward his father’s legacy. He obtained a second patent for an improved version of the sharpener called the “Rollet,” which was designed to be portable and could be carried in a pocket.
The Rollet featured a design that opened and closed neatly, making it convenient for field use.
The Original Devices: Robo and Rollet
The Robo
The original rolling knife sharpener, called the “Robo,” was patented in 1949. It featured a fixed sharpening stone where the blade is placed and the sharpener is rolled back and forth to sharpen the blade at a fixed angle.
The Rollet
The Rollet was a later invention by Nelson L. Thompson, designed for portability and convenience. It was patented with two patent numbers and was sold to companies, including the Girl Scouts of America, who branded the device with their logo.
The Robo Junior
Another device, the Robo Junior, was a smaller version of the Robo, also patented and designed to protect the intellectual property of the original concept.
The Impact and Evolution of the Design
The original design by Willis F. Thompson set off a race among companies to modify and improve the rolling knife sharpener. Many modern sharpeners are based on this original concept but have been altered in design and function.
Some companies claim to be the original inventors, but the evidence shows that the concept dates back to the 1940s. The modifications and innovations by others are part of the natural evolution of the product.
Intellectual Property and Innovation
The story of the rolling knife sharpener highlights the importance of protecting intellectual property through patents. While innovation is encouraged, claiming originality without basis is misleading.
The original patents and devices serve as a foundation for today’s sharpeners, and acknowledging this history is essential for respecting the inventors’ contributions.
Conclusion
The original rolling knife sharpener was invented by Willis F. Thompson in the 1940s, with patents granted in 1949 and subsequent improvements by his son, Nelson L. Thompson. This invention laid the groundwork for the modern rolling knife sharpeners used today.
Claims by modern companies to be the original inventors are not supported by patent records and historical evidence. The evolution of the rolling knife sharpener is a testament to innovation built upon foundational inventions.
Understanding this history enriches our appreciation of the tools we use and honors the legacy of inventors like Willis F. Thompson.
Invitation for Discussion
If you have any comments or additional information about the rolling knife sharpener’s history, feel free to share them. The story of this invention continues to evolve, and further research or interviews with descendants of the Thompsons may provide even more insights in the future.
