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Rock-Ola

Rock-Ola 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 Rock-Ola rather than just read about it. In short: The Rock-Ola Manufacturing Corporation is an American developer and manufacturer of juke-boxes and related machinery. It was founded in 1927 by a pioneer of coin-operated machines, David Cullen Rockola, to manufacture gambling slot machines, weighing scales, and pinball machines.

Rock-Ola — main illustration
Rock-Ola — illustration

Key takeaways

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

Reference excerpt

The Rock-Ola Manufacturing Corporation is an American developer and manufacturer of juke-boxes and related machinery. It was founded in 1927 by a pioneer of coin-operated machines, David Cullen Rockola, to manufacture gambling slot machines, weighing scales, and pinball machines. The firm later also produced parking meters, furniture, arcade video games, and firearms, but became best known for its jukeboxes. Rockola was changed to 'Rock-Ola', to modify the pronunciation.

History

The Rock-Ola Scale Company was founded in 1927 by David Cullen Rockola to manufacture coin-operated entertainment machines. During the 1920s, Rockola was linked with Chicago organized crime and escaped a jail sentence by turning State's Evidence. Mr. Rockola added the hyphen because people often mispronounced his name. The name was changed to Rock-Ola Manufacturing Corporation in 1932. The company successfully expanded its production line through the Great Depression to include furniture. Starting in 1935, Rock-Ola sold more than 400,000 jukeboxes under the Rock-Ola brand name, which predated the rock and roll era by two decades, and is thought to have inspired the term. Rock-Ola became a prime contractor for production of the M1 carbine for the US Military during World War II. Rock-Ola machined receivers, barrels, bolts, firing pins, extractors, triggers, trigger housings, sears, operating slides, gas cylinders, and recoil plates. Rock-Ola used its furniture machinery to manufacture stocks and handguards for its own production and for other prime contractors, and subcontracted production of other machined parts. Rock-Ola delivered 228,500 military carbines at $58 each before contracts were cancelled on May 31, 1944. Rock-Ola also produced approximately sixty "presentation" carbines as gifts to company executives and other officials. Presentation carbines were finished in polished blue rather than the dull Parkerizing used on military weapons, and were accompanied by a custom-made wooden case including the name of the recipient engraved on a brass plate. Some of the presentation carbines had no serial numbers, while others were numbered in a special sequence preceded by "EX". Military production carbines had serial numbers in the following range:

1,662,250 - 1,762,519 4,532,100 - 4,632,099 6,071,189 - 6,099,688 6,199,684 - 6,219,688 Rock-Ola's production total was the lowest of any successful carbine prime contractor, amounting to 3.7% of the 6,221,220 made. The relative rarity and the distinctive name increase the value of Rock-Ola carbines; and the presentation carbines are highly prized among collectors. In 1952, a Rock-Ola M1 carbine was the murder weapon used in the killing of a prominent British scientist and his family who were holidaying in France.

Rock-Ola was also the maker of shuffleboard tables from 1948 to 1950. Considered by collectors the Cadillac of shuffleboards due to their Art Deco styling with curving woodwork and much chrome, they are highly sought after by players. In the early 1980s, Rock-Ola produced video arcade machines, including Fantasy, (1981), Jump Bug (1981), and Eyes (1982). The most successful Rock-Ola arcade game was Nibbler.

Jukebox production

David Rockola saw the repeal of prohibition in the USA in 1932 as an opportunity to expand his amusement business into coin operated phonographs, to be placed in the now legal bars and nightclubs. The new jukeboxes would use the brand name “Rock-Ola” and the first model – the model A – was introduced in 1935. This was a 12 selection jukebox which was replaced by 20 selection jukeboxes by 1937, the first being the model IMP-20. Many people erroneously assume the name "Rock-Ola" was a take on the famous "Victrola" brand of phonographs manufactured by RCA Victor. Rock-Ola continued to produce a new model every year up until 1942 when the constraints of World War II had an impact. After the war, they produced what some consider as their most attractive 78 rpm player, the model 1428. In the early 1950s, the arrival of the 45 rpm seven inch record brought major changes to jukebox designs for all manufacturers. The first 45 rpm player from Rock-Ola was the model 1434 which held 25 records, and thus 50 selections. In 1954, the jukebox manufacturer Seeburg Corporation brought out their model HF100R. This had a major influence on Rock-Ola who then brought to market a series of models very similar in appearance to the Seeburg, these being the model 1448 in 1955, through to the model 1465 in 1958. The late 1950s to the early 1960s saw Rock-Ola manufacture a variety of popular jukebox models, the best-sellers being the Tempo, Regis, Princess, and Empress models. Visible playing mechanisms eventually disappeared from Rock-Ola and all other manufacturers by the mid 1960s. Rock-Ola continued to manufacture jukeboxes into the 1970s and beyond, although the units themselves eventually became less conspicuous in the bars and clubs where they were located, ultimately most being placed out of sight. Rock-Ola eventually sold out to Antique Apparatus in 1992, and they continue to manufacture several models of jukeboxes under the Rock-Ola name today.

… excerpt ends here. Continue reading the full article.

Illustrations

Rock-Ola: Rock-Ola neon sign
Rock-Ola neon sign
Rock-Ola: Rock-Ola Capri II from 1965
Rock-Ola Capri II from 1965
Rock-Ola: Fully Restored Rock Ola Antique Shuffleboard
Fully Restored Rock Ola Antique Shuffleboard
Rock-Ola illustration
Rock-Ola illustration

Worked examples

Example 1 — a first encounter with Rock-Ola

Start with the simplest possible case. Write down what Rock-Ola 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 Rock-Ola 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 Rock-Ola 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 Rock-Ola

In research
Rock-Ola 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 Rock-Ola 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
Rock-Ola is common in secondary-school and first-year university syllabi. It links to neighbouring topics American musical instrument makers, Jukebox manufacturers, Manufacturing companies based in Chicago, so understanding it makes those chapters shorter.
In everyday life
Look for Rock-Ola 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 Rock-Ola in 20 minutes

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

Frequently asked questions

What is Rock-Ola in simple terms?

The Rock-Ola Manufacturing Corporation is an American developer and manufacturer of juke-boxes and related machinery. It was founded in 1927 by a pioneer of coin-operated machines, David Cullen Rockola, to manufacture gambling slot machines, weighing scales, and pinball machines.

Why does Rock-Ola 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 Rock-Ola?

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 Rock-Ola.

Tags

  • American musical instrument makers
  • Jukebox manufacturers
  • Manufacturing companies based in Chicago
  • Music hardware

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