engineering

Raymond W. Ketchledge

Raymond W. Ketchledge is a engineering 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 Raymond W. Ketchledge rather than just read about it. In short: Raymond Waibel Ketchledge (December 8, 1919 – October 23, 1987) was an American engineer, known for his contributions to the first computerized telephone switching control systems. Biography Born in Harrisburg, Pennsylvania, Ketchledge married Lois Jane Quackenbush.

Key takeaways

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

Reference excerpt

Raymond Waibel Ketchledge (December 8, 1919 – October 23, 1987) was an American engineer, known for his contributions to the first computerized telephone switching control systems.

Biography Born in Harrisburg, Pennsylvania, Ketchledge married Lois Jane Quackenbush. He earned a B.Sc. and M.Sc. (1942) in electrical engineering from the Massachusetts Institute of Technology before joining Bell Labs where he stayed for his whole professional career (1942–1982). At Bell Labs he first worked on the Mark 24 FIDO Torpedo used in World War II, then took part in developing the first underwater repeater systems and the L3 coaxial carrier for Transatlantic telephone cable systems (1946–1954), before becoming the leader of the Switching systems development group (1956). This brought him fame due to the pioneering work on applying stored program architecture to telephone switching systems. Ketchledge oversaw the installation project for the first 1ESS switch in Succasunna (1965). Following this he directed the Indian Hill laboratories of Naperville, Illinois (1966–1975), before returning to New Jersey where he oversaw the Ocean systems research division in Whippany, New Jersey, until his retirement. He held sixty patents in diverse areas, including thirty-one in switching systems. He died of cancer at his home in Englewood, Florida, on October 23, 1987.

Awards National Academy of Engineering inductee (1970) IEEE Alexander Graham Bell Medal (1976) with Amos E. Joel Jr. and William Keister IEEE Fellow New Jersey Inventors Hall of Fame inductee

References

Worked examples

Example 1 — a first encounter with Raymond W. Ketchledge

Start with the simplest possible case. Write down what Raymond W. Ketchledge claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Raymond W. Ketchledge 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 Raymond W. Ketchledge 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 Raymond W. Ketchledge

In research: Raymond W. Ketchledge appears in engineering 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 Raymond W. Ketchledge 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: Raymond W. Ketchledge is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1919 births, 1987 deaths, 20th-century American engineers, so understanding it makes those chapters shorter.
In everyday life: Look for Raymond W. Ketchledge 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Raymond W. Ketchledge in 20 minutes

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

Frequently asked questions

What is Raymond W. Ketchledge in simple terms?

Raymond Waibel Ketchledge (December 8, 1919 – October 23, 1987) was an American engineer, known for his contributions to the first computerized telephone switching control systems. Biography Born in Harrisburg, Pennsylvania, Ketchledge married Lois Jane Quackenbush.

Why does Raymond W. Ketchledge matter?

Because it connects several engineering 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 Raymond W. Ketchledge?

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 Raymond W. Ketchledge.