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Laurens Hammond

Laurens Hammond 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 Laurens Hammond rather than just read about it. In short: Laurens Hammond (January 11, 1895 – July 1, 1973) was an American engineer and inventor. His inventions include the Hammond organ, the Hammond clock, and the world's first polyphonic musical synthesizer, the Novachord.

Laurens Hammond — main illustration
Laurens Hammond — illustration

Key takeaways

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

Reference excerpt

Laurens Hammond (January 11, 1895 – July 1, 1973) was an American engineer and inventor. His inventions include the Hammond organ, the Hammond clock, and the world's first polyphonic musical synthesizer, the Novachord.

Youth Laurens Hammond was born in Evanston, Illinois, on January 11, 1895 to William Andrew Hammond and Idea Louise Strong. Laurens showed his great technical prowess from an early age. His father, William, took his own life in January 1897, ostensibly due to failure of the First National Bank of Illinois, which he had founded. Upon her husband's death, Idea, who was an artist, relocated to France with Laurens to further her studies, and the family spent the next eleven years in France and Germany.

Early inventions When the family returned to Evanston in 1909, Laurens, then 14, was fluent in French and German. While in Europe, he had already designed a system for automatic transmission for automobiles. At his mother's suggestion, he submitted his designs to engineers at French automaker Renault, although they were not accepted. His first patent, in 1912, was for a barometer that could sell for one dollar.

University and military service Hammond studied mechanical engineering at Cornell University, and was a member of the Delta Upsilon fraternity. He graduated with honors in 1916. When the United States entered World War I, Hammond served with the 16th Regiment Engineers (Railway), American Expeditionary Force, in France. He rose to the rank of captain.

Inventions

Following the war, Hammond moved to Detroit, where he was chief engineer for the Gray Motor Company, a manufacturer of marine engines. A partner in the company, Col. John H. Poole, with whom he had served in France, knew of his engineering skills, and paid him an extra $300 a week under the table to stay with Gray Motor. In 1919, he invented a silent spring-driven clock. This invention brought him enough money to leave Gray Motor Company and rent his own space in New York City. In 1922, Hammond invented the Teleview system of shutter glasses in association with 3-D films. One feature was made for the system, The Man from M.A.R.S.. He premiered this show at the Selwyn Theatre in New York in December 1922 to critical acclaim, but the cost of installing the expensive machinery in the theater was prohibitive, and the process was never used again. A 2-D version of the film, renamed Radio-Mania, continued to screen.

Hammond's work on the synchronous motor led him in 1928 to set up the Hammond Clock Company, with six workers, above a grocery store in Chicago. Demand was high and the business soon grew into a large factory. He was responsible for a number of other inventions, such as an electric bridge table. A mechanism below the $25 table's surface shuffled the cards and dealt them to each of the four players. In 1933, Hammond bought a used piano, and discarded everything apart from the keyboard action. Using the keyboard as a controller, he experimented with different sound-generating methods, finally settling on one, the tonewheel generator. The company's assistant treasurer, W. L. Lahey, was the organist at the nearby St. Christopher's Episcopal Church, and Hammond consulted him concerning the quality of the new instrument's sound. Thanks to Hammond's prior manufacturing and engineering experience, the tonewheel generator was extremely well-engineered by the time the "Hammond Organ" finally went into production in 1935. Tonewheel organs are still in regular use in the twenty-first century, which is a testament to the quality of the design and execution of the product. Hammond filed his patent application on January 19, 1934. At that time, unemployment was a major problem due to the Great Depression, and with this in mind, the Patent Office rushed to grant his application, with the hope of creating jobs in the area. Hammond was awarded the Franklin Institute's John Price Wetherill Medal in 1940 for the invention of the Hammond electric organ.

Later life and death Hammond left his position as president of his company in 1955, and retired from the company in 1960, at the age of sixty-five. During his life he held 91 patents. He was married to Roxana Scoville, and had one daughter. He died in Cornwall, Connecticut on July 1, 1973, aged 78. In 2017 the Laurens Hammond Museum was founded in Kielce, Poland as a division of the Museum of Toys and Play.

Notes

Further reading The most comprehensive source on Laurens Hammond's life and inventions is the book by Stuyvesant Barry, Hammond as in Organ: The Laurens Hammond Story. This book was never published, but is available on the web at The Hammond Organ Story.

External links "Electric Pipeless Organ Has Millions of Tones". Popular Mechanics (April 1936). April 1936. – one of the first large detailed article on the Hammond Organ and how it worked "Hammond Products". OrganHouse.com. Archived from the original on July 16, 2012. Retrieved September 9, 2011. – a collection of Hammond products including: clock, organ, Novachord, Solovox, rhythm Machine, and bridge table. Blip

Illustrations

Laurens Hammond illustration
Laurens Hammond: Hammond with his invention the Teleview, in 1923
Hammond with his invention the Teleview, in 1923
Laurens Hammond: Hammond Electric Bridge Table(Muzeum Hammonda in Kielce, Poland)
Hammond Electric Bridge Table(Muzeum Hammonda in Kielce, Poland)

Worked examples

Example 1 — a first encounter with Laurens Hammond

Start with the simplest possible case. Write down what Laurens Hammond 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 Laurens Hammond 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 Laurens Hammond 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 Laurens Hammond

In research
Laurens Hammond 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 Laurens Hammond 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
Laurens Hammond is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1895 births, 1973 deaths, 20th-century American engineers, so understanding it makes those chapters shorter.
In everyday life
Look for Laurens Hammond 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 Laurens Hammond in 20 minutes

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

Frequently asked questions

What is Laurens Hammond in simple terms?

Laurens Hammond (January 11, 1895 – July 1, 1973) was an American engineer and inventor. His inventions include the Hammond organ, the Hammond clock, and the world's first polyphonic musical synthesizer, the Novachord.

Why does Laurens Hammond 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 Laurens Hammond?

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 Laurens Hammond.

Tags

  • 1895 births
  • 1973 deaths
  • 20th-century American engineers
  • 20th-century American inventors
  • Cornell University College of Engineering alumni
  • Engineers from Illinois
  • Inventors from Illinois
  • Inventors of musical instruments
  • People from Evanston, Illinois

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