Rivets and Buttons — The 1873 Patent That Changed Denim Durability

Most people wearing jeans today don't know the date May 20, 1873. But without what happened on that date, the jeans they're wearing would likely look different — or might not exist as an industrial product at all. The patent that Levi Strauss and Jacob Davis received from the U.S. Patent Office on that day was a solution to a simple problem: pocket seams that tore under working conditions. The solution — a copper rivet at each stress point — transformed durable work clothing from a sewing problem into a hardware problem, and changed how durable workwear was designed from that point on.

May 20, 1873: Jacob Davis's Invention

The inventor was not Levi Strauss. It was Jacob W. Davis, a tailor operating in Reno, Nevada.

In the early 1870s, a woman came to Davis with a request: her husband's work pants kept tearing at the pocket corners. The man was large and worked hard, and no amount of careful sewing seemed to hold. Davis, thinking through his available options, tried hammering copper rivets from a nearby harness shop into the pocket corners. The reinforcement held — through repeated use, through repeated washing, through conditions that had destroyed previous repairs.

Davis recognized the commercial potential but lacked the capital to file a patent. His fabric supplier was Levi Strauss & Company in San Francisco. Davis wrote to Strauss proposing a joint application. On May 20, 1873, U.S. Patent No. 139,121 was granted to both men.

The invention's core insight was straightforward: thread alone concentrates stress at the termination point of a seam. A metal rivet distributes that stress across a larger contact area in the fabric. The geometry is simple, but the practical result — pockets that survived months of heavy use rather than tearing within weeks — represented a genuine performance improvement for the working-class customers who needed it.

Why Copper: The Material Logic

Copper was not selected arbitrarily. The material choice reflects the practical constraints of 1870s industrial production.

Workability was the first factor. Copper is soft enough to be stamped into precise rivet shapes using the industrial machinery available in the 1870s. It sets cleanly when peened — the process of hammering the rivet's tail to expand it and lock it in place — producing a consistent mechanical bond without the cracking or brittleness that harder metals would introduce at that thin gauge.

Corrosion resistance was the second factor. Copper oxidizes to form a stable patina — the blue-green copper oxide commonly called verdigris. This patina is not decay; it is a protective barrier that slows further oxidation of the underlying metal. Work clothing was washed in water, worn in sweat, and exposed to weather. Steel rivets would rust, staining the fabric and eventually failing structurally. Copper held up.

In the contemporary premium denim market, copper rivet purity and surface treatment have become points of differentiation. Some brands specify the copper alloy composition and finishing treatment of their rivets as part of the garment's quality narrative. The rivet has traveled from functional hardware to aesthetic and material signifier — but its function remains identical to Davis's original application.

Button Evolution: Donut to Tack-and-Back

The front closure button sits alongside the rivet as denim's other foundational piece of metal hardware. Its evolution provides a secondary dating system that collectors use to approximate a garment's manufacturing period.

Early Levi's XX (the pre-501 designation) used what is called a donut button: a single-piece metal button with a central hole, stamped from copper or brass sheet. The name is self-descriptive. The button's larger diameter and distinctive profile are recognizable on period garments and on faithful contemporary reproductions.

Manufacturing optimization and material economics eventually moved production toward the tack-and-back construction. A tack (a pin, inserted from the back through the fabric and the button's mounting hole) and a back (the visible button face, which receives the tack and is crimped to retain it) — two pieces, assembled in production. The construction is faster to apply at volume and uses less material per unit.

Button back stampings are also used for dating. Manufacturer marks such as "SCOVILL MFG.CO" identify the hardware supplier and can help narrow a garment's production window — Scovill Manufacturing Company was a major American button and rivet supplier through the mid-twentieth century.

The Hidden Rivet: A Problem from the Saddle

An apparently minor complaint in the 1930s produced one of the more discussed design changes in denim hardware history.

The copper rivet at the center of the coin pocket — the small watch pocket mounted inside the right front pocket — began generating complaints. The specific problem: the rivet was scratching saddle leather during horseback riding. In one version of the documented history, this came from riders whose work included daily mounted travel. In another version, a school administrator complained that the rivet was damaging leather-upholstered classroom furniture.

The two accounts are not mutually exclusive, and neither has been definitively established as the primary cause. What is documented is Levi Strauss's response: the coin pocket rivet was covered with a small cap of matching fabric — the "hidden rivet." The structural function was preserved beneath; only the metal surface was concealed.

The term "hidden rivet" (隠しリベット in Japanese collecting terminology) refers specifically to this configuration: a fabric-covered rivet that is present and functional but invisible on the garment's surface. It became a standard Levi's specification by the late 1930s, and it remains in use on contemporary 501 production. The coin pocket rivet continues to reinforce the pocket mouth while presenting no metal contact surface to anything the jean rubs against.

Levi's Vintage Clothing — Copper Hardware Reference

Levi's Vintage Clothing 1947 501 — Vintage Reproduction (Copper Rivet / Tack-and-Back)

LVC / Department store authorized retailers

LVC's 1947-spec 501 reproduction replicates the copper rivet specification, tack-and-back button construction, and hidden coin pocket rivet of the period. A practical reference for the hardware transitions described in this chapter.

¥38,500 (tax included)

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Wartime Copper Rationing: When Rivets Disappeared

Copper was among the materials most critical to American military production during World War II. Ammunition casings, electrical systems, and communication equipment all required copper in large quantities.

In 1942, the War Production Board issued restrictions on copper use in civilian goods. Denim was affected. The copper rivets that had been standard on work pants since 1873 — nearly seventy years of uninterrupted use — were eliminated or substituted for the duration of the war. Manufacturers who could not readily substitute used iron alternatives that rusted, stained the fabric, and degraded structurally. Some eliminated pocket rivets entirely and replaced them with bar tacks (reinforced stitching at stress points).

The garments produced under these restrictions — roughly 1942 to 1947 — are the wartime models. Their hardware profile is defined by what was absent: no copper rivets, or iron substitutes where copper would have been, no hidden rivet at the coin pocket because there was often no coin pocket rivet at all.

Combined with the sewing specification changes from Chapter 6 (no cinch back, no arcuate stitching, reduced belt loop count), wartime jeans have a construction profile that is immediately distinguishable from prewar and postwar equivalents. The hardware absence is not a quality indicator in the evaluative sense — it records a specific historical moment when material availability was controlled externally. That's part of what makes authentic wartime examples difficult to fake: the simplification was systemic, not selective.

Post-1947 production returned to copper hardware. The 1947 date is significant in the LVC reproduction context precisely because it represents the return to standard construction after the wartime period.

Modern Hardware: Continuity and Variation

The copper rivet and button of 2025 serve the same function as the copper rivet and button of 1873. The geometry hasn't changed in any fundamental way.

What has changed is the precision and intentionality of specification. Contemporary premium denim brands — particularly in Japan — treat rivet alloy composition, surface finish, and setting depth as variables in the garment's quality system. Rivets that develop a particular patina over time, that change surface character through washing and wear, are specified as part of the intended aging behavior of the piece.

The aesthetic of aged hardware has become inseparable from the broader denim patina culture. A heavily worn pair of selvedge jeans with a well-patinated rivet — the copper surface developed from bright orange-red to dark olive green — reads as evidence of authentic long-term wear in the same way the fade pattern itself does. The hardware ages alongside the fabric.

TCB jeans — Domestic Copper Hardware

TCB jeans TCB 50's — One-Wash Straight (Japanese Hardware Specification)

TCB jeans / Authorized retailers

Okayama-based TCB jeans uses domestically sourced copper rivets and tack-and-back buttons on their 1950s-spec model. A reference point for contemporary premium hardware specification in Japanese selvedge production.

¥33,000 (tax included)

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One hundred and fifty years separate the original patent from the current production of the garment it made possible. The rivet specification — copper, positioned at pocket stress points, set by mechanical peening — is essentially unchanged. That's a long run for an industrial hardware solution, and it suggests Davis had identified something genuinely load-bearing about the problem he was solving.

The denim journey has now covered its full production sequence: cotton to yarn, yarn to dye, yarn to fabric, fabric to finished goods, and the hardware that holds it together. What the fabric does from that point — how it fades, how it develops, how it records years of wear — is the subject of the other chapters in this archive.

Sources & References

• US Patent No. 139,121 (May 20, 1873, Strauss & Davis)
• Lynn Downey, Levi Strauss & Co.: A History (official company history)
• WPB Limitation Order L-85 (1942, metal and textile material restrictions)
• Tortora, P. G. Fairchild's Dictionary of Textiles (rivet and hardware definitions)

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