engineering

La Compagnie des Lampes

La Compagnie des Lampes 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 La Compagnie des Lampes rather than just read about it. In short: La Compagnie des Lampes ("The Lamp Company") was a name used by several French companies all in the area of electrical products particularly lighting. La Compagnie des Lampes (1888) The original Compagnie des Lampes was set up at Ivry-sur-Seine in 1888.

Key takeaways

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

Reference excerpt

La Compagnie des Lampes ("The Lamp Company") was a name used by several French companies all in the area of electrical products particularly lighting.

La Compagnie des Lampes (1888) The original Compagnie des Lampes was set up at Ivry-sur-Seine in 1888. The plant was subsequently attached to the CGE (Compagnie Générale d'Electricité) on its acquisition in 1898. The plant is classified as a historical monument. In 1915, the plant was the second to start manufacturing TM triodes ("Télégraphie Militaire") in France, under their Métal brand (the first was E.C.&A. Grammont (Lyon) under their Radio Fotos brand). Later they made tubes for domestic AC transformer heating such as the BW604 and BW1010 under their Métal-Secteur brand.

La Compagnie des Lampes (1911) Founded in 1911 by Paul Blavier, La Compagnie des Lampes was a light bulb factory workshop, located in Saint-Pierre-Montlimart, near Cholet. The company changed its name in 1918 to become Manufacture de lampes à incandescence, la Française. It was associated with the Thomson group in the 1950s.

La Compagnie des Lampes (1921) In 1921 CFTH (Compagnie Française Thomson-Houston) and CGE (Compagnie Générale d'Electricité) jointly created a new Compagnie des Lampes. It later became a major player in the field of lighting in France, notably through its brand MAZDA. Between 1924 and 1939, it was part of the Phoebus cartel, an oligopoly that dominated the market for light bulbs while putting in place an agreement on the principle of planned obsolescence for their products. Besides light bulbs (and like British Ediswan), CdL (1921) also made vacuum tubes under the Mazda brand, for example 6H8G (1947), 3T100A1 (1949), E1 (1950); since 1953 as LAMPE MAZDA: 2G21 (1953), 927 (1954), EL183 (1959), EF816 (1962). Many of their tubes were also available from Compagnie Industrielle Française des Tubes Electroniques (CIFTE) under their Mazda-Belvu brand (originating from Societé Radio Belvu, which sold Grammont's Fotos tubes).

References

Illustrations

Worked examples

Example 1 — a first encounter with La Compagnie des Lampes

Start with the simplest possible case. Write down what La Compagnie des Lampes 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 La Compagnie des Lampes 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 La Compagnie des Lampes 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 La Compagnie des Lampes

In research: La Compagnie des Lampes 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 La Compagnie des Lampes 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: La Compagnie des Lampes is common in secondary-school and first-year university syllabi. It links to neighbouring topics Electrical engineering companies of France, French company stubs, Lighting brands, so understanding it makes those chapters shorter.
In everyday life: Look for La Compagnie des Lampes 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 La Compagnie des Lampes in 20 minutes

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

Frequently asked questions

What is La Compagnie des Lampes in simple terms?

La Compagnie des Lampes ("The Lamp Company") was a name used by several French companies all in the area of electrical products particularly lighting. La Compagnie des Lampes (1888) The original Compagnie des Lampes was set up at Ivry-sur-Seine in 1888.

Why does La Compagnie des Lampes 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 La Compagnie des Lampes?

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 La Compagnie des Lampes.