physics

Swiss Army knife

Swiss Army knife is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Swiss Army knife rather than just read about it. In short: The Swiss Army knife (German: Schweizer Taschenmesser, Sackmesser, Hegel, etc.) is a multi-tooled pocketknife made for the Swiss Army since 1890, with consumer versions made, particularly since 1945. The term "Swiss Army knife" was used by American soldiers after World War II rather than the German word "Offiziersmesser", meaning "Officer's knife".

Key takeaways

Swiss Army knife belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Swiss Army knife to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Swiss Army knife from memory before moving on to harder problems.

Reference excerpt

The Swiss Army knife (German: Schweizer Taschenmesser, Sackmesser, Hegel, etc.) is a multi-tooled pocketknife made for the Swiss Army since 1890, with consumer versions made, particularly since 1945. The term "Swiss Army knife" was used by American soldiers after World War II rather than the German word "Offiziersmesser", meaning "Officer's knife". They are commonly made by Victorinox and its subsidiary Wenger. The Swiss Army knife generally has a drop-point main blade plus screwdriver, bottle opener, can opener and awl, while commercial versions include other blades and tools, such as scissors, corkscrew, saw blade, tweezers and toothpick. The blades and tools are folded into the handle of the knife through a pivot point mechanism. The handle is traditionally a brown cellulose fibre with embossed Swiss cross, with later military issue having plastic handles with the coat of arms of Switzerland and consumer versions mainly having red plastic handles but also made in a variety of colours and materials. Consumer knives can be distinguished by their cross logos; the Victorinox logo has a cross surrounded by a shield while Wenger's has a cross surrounded by a rounded square. The knives are an icon of Swiss culture and the design and the versatility of the knife have worldwide recognition. Until 2008, Victorinox and Wenger supplied about 50,000 knives to the Swiss military each year and manufactured many more for export, mostly to the United States. Sales declined significantly as a result of competition from other pocket multi-tools and legal restrictions on the carrying of knives, particularly on airlines.

History

Origins Multi-tool pocket knives have been made since at least the mid-19th century. In 1851, in Moby-Dick (chapter 107), Herman Melville mentions the "Sheffield contrivances, assuming the exterior – though a little swelled – of a common pocket knife; but containing, not only blades of various sizes, but also screwdrivers, cork-screws, tweezers, bradawls, pens, rulers, nail files and countersinkers."

During the late 1880s, the Swiss Army decided to purchase a new folding pocket knife for their soldiers. This knife was to be suitable for use by the army in opening canned food and for maintenance of the Swiss service rifle, the Schmidt–Rubin, which required a screwdriver for assembly and disassembly. In January 1891, the knife received the official designation Modell 1890. The knife had a blade, reamer, can opener, screwdriver, and grips made out of dark oak wood, some possibly later replaced with ebony wood. At that time, no Swiss company had the necessary production capacity, so the initial order for 15,000 knives was placed with the German knife manufacturer Wester & Co. of Solingen, Germany. These knives were delivered in October 1891.

Victorinox and Wenger

In 1891, Karl Elsener, owner of a business in Ibach, Switzerland that made surgical equipment (which later became Victorinox) set out to manufacture the knives in Switzerland. In late 1891, Elsener began production of the Modell 1890 knives, in competition with the German manufacturer. He incurred financial losses doing so, as Wester & Co was able to produce the knives at a lower cost. In 1893, the Swiss cutlery company Paul Boéchat & Cie of Delémont in the French-speaking Canton of Jura, received its first contract from the Swiss military to produce model 1890 knives. Later, its general manager, Théodore Wenger, acquired the company and renamed it the Wenger Company. The two Swiss companies split the initial contract for provision of the knives. Elsener was on the verge of bankruptcy when, in 1896, he developed an improved knife, intended for the use by officers, with tools attached on both sides of the handle using a special spring mechanism, allowing him to use the same spring to hold them in place. This new knife was patented on 12 June 1897, with a second, smaller cutting blade, a corkscrew, and cellulose fibre grips, under the name of Schweizer Offiziers- und Sportmesser ("Swiss officer's and sports knife"). The Swiss military did not commission the knife but it was successfully marketed internationally, restoring Elsener's company to prosperity. Wenger produced similar knives. In 1908 the Swiss government split the contract between Victorinox and Wenger, placing half the orders with each. In 1909, Elsener used a variation on the Swiss coat of arms to identify his knives. With slight modifications, this is still the company logo. In 1909, following the death of his mother, Elsener used her name Victoria as a brand name. In 1921 following the invention of stainless steel (acier inoxydable in French), Karl Elsener's son renamed the company to be Victorinox combining Victoria and inoxydable. Wenger advertised as "the Genuine Swiss Army Knife" and Victorinox as "the Original Swiss Army Knife". By the early 2000s, sales of Swiss Army knives declined dramatically as a result of competition from other pocket multi-tools and restrictions on carrying knives, especially on airlines. On 26 April 2005, Victorinox acquired Wenger, becoming the sole supplier of knives to the military of Switzerland. Victorinox at first kept the Wenger brand intact, but on 30 January 2013, it announced that the Wenger brand of knives would be abandoned in favour of Victorinox. A press release stated that Wenger's factory in Delémont would continue to produce knives and all employees at this site will retain their jobs. They further elaborated that an assortment of items from the Wenger line-up will remain in production under the Victorinox brand name. Wenger's US headquarters would be merged with Victorinox's location in Monroe, Connecticut. Wenger's watch and licensing business will continue as a separate brand: SwissGear.

Swiss government legal proceedings over trademark Victorinox registered the words "Swiss Army" and "Swiss Military" as trademarks in the United States (US). The Swiss government agency, Armasuisse took legal action against Victorinox in October 2018. After an initial hearing, Victorinox agreed to cede the US registration in of the term "Swiss military" to Armasuisse in return for an exclusive licence to market perfumes under the same name.

Features

Components

There are various models of the Swiss Army knife with different tool combinations. Though Victorinox does not provide custom knives, they have produced many different variations to suit individual users, with the Wenger company producing even more model variations.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Swiss Army knife

Start with the simplest possible case. Write down what Swiss Army knife claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Swiss Army knife before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Swiss Army knife ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Swiss Army knife

In research: Swiss Army knife appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Swiss Army knife in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Swiss Army knife is common in secondary-school and first-year university syllabi. It links to neighbouring topics Camping equipment, Mechanical hand tools, Military equipment of Germany, so understanding it makes those chapters shorter.
In everyday life: Look for Swiss Army knife outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Swiss Army knife in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Swiss Army knife means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Swiss Army knife out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Swiss Army knife in simple terms?

Why does Swiss Army knife matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Swiss Army knife?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Swiss Army knife.