science

Kryptonite lock

Kryptonite lock is a science 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 Kryptonite lock rather than just read about it. In short: Kryptonite is an Allegion-owned brand of bicycle lock for securing a bicycle to a pole or other fixture, when the owner wants to leave the bicycle in a public place. The basic design, made of hardened steel of circular cross section bent into a U-shape with a removable crossbar, has been emulated by numerous other manufacturers, and adapted with variations in size and shape for other applications, such as locking mo…

Key takeaways

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

Reference excerpt

Kryptonite is an Allegion-owned brand of bicycle lock for securing a bicycle to a pole or other fixture, when the owner wants to leave the bicycle in a public place. The basic design, made of hardened steel of circular cross section bent into a U-shape with a removable crossbar, has been emulated by numerous other manufacturers, and adapted with variations in size and shape for other applications, such as locking motorcycles. The product was named after kryptonite, the fictitious substance that can thwart the powerful comic-book hero Superman. The name is used under a limited trademark agreement with DC Comics dating back to 1983.

History The Kryptonite u-lock was developed by Stanley Kaplan. Kaplan partnered with Michael Zane, whose father had a metal manufacturing company, to produce and market the locks. In 1972 Michael Zane bought the lock and company from Kaplan. In the early 1970s, in the US, the only proven method to secure one's bicycle was by the use of case hardened security chains with hexagonal links, but some cyclists were making the mistake of using inexpensive chains or cables that could be breached by thieves using commonly available tools. Indeed, local hardware stores would often sell inexpensive chain cut to length using simple bolt cutters. The first Kryptonite lock model was made of sheet metal cut and bent to shape, but the company soon went to the now universal circular cross section. In an early test of the Kryptonite lock, a bicycle was locked to a signpost in Greenwich Village in New York City for thirty days. Thieves stripped the bicycle of every part that could be removed, but the lock resisted all attempts to break it. Ingersoll Rand acquired Kryptonite in 2001. In 2013 Ingersoll Rand's security products were placed in a spin-off company called Allegion.

Design Until 2004, Kryptonite locks used the tubular pin tumbler locking mechanism. In 2005, after it was demonstrated that the tubular pin tumbler locks used on Kryptonite locks could easily be opened with the shaft of a Bic ballpoint pen of matching diameter, Kryptonite changed their locks from the tubular to a disc mechanism, preventing the use of cylindrically shaped objects to defeat the locking system. After this problem became public, Kryptonite offered a free exchange program for all owners of locks with tubular mechanisms. Kryptonite launched a Messenger Collection in 2015, created with input from actual bicycle messengers in New York City.

See also Kryptonite (disambiguation) Seatylock

References

External links Official website Early lock being picked

Illustrations

Worked examples

Example 1 — a first encounter with Kryptonite lock

Start with the simplest possible case. Write down what Kryptonite lock claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Kryptonite lock 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 Kryptonite lock 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 Kryptonite lock

In research: Kryptonite lock appears in science 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 Kryptonite lock 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: Kryptonite lock is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cycling equipment, Lock manufacturers, Locks (security device), so understanding it makes those chapters shorter.
In everyday life: Look for Kryptonite lock 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 Kryptonite lock in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kryptonite lock 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 Kryptonite lock out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kryptonite lock in simple terms?

Why does Kryptonite lock matter?

Because it connects several science 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 Kryptonite lock?

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 Kryptonite lock.