What Elmer A. Sperry invented?
Answer: D
Elmer Sperry invented the gyrocompass.
Patented in 1908, it uses a spinning gyroscope to find true north rather than magnetic north, and is unaffected by the iron of a ship's hull. It made accurate navigation in steel warships possible.
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Who invented the battery?
Answer: B
Alessandro Volta invented the battery.
His voltaic pile of 1800 stacked discs of zinc and silver separated by brine-soaked cloth, and gave the first steady electric current. The volt is named after him.
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What device for new parents did Ann Moore invent in 1969?
Answer: D
It was the infant carrier.
Ann Moore, a Peace Corps nurse in Togo, saw mothers carrying babies tied on their backs in cloth, and with her mother designed the Snugli soft carrier after returning to the United States.
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What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes?
Answer: A
Charles Richter.
He devised the scale at the California Institute of Technology in 1935 with Beno Gutenberg. It is logarithmic: each whole number is a tenfold increase in wave amplitude and about thirty-two times the energy.
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Which charge card, launched in 1950, was the first to be accepted nationally in the United States?
Answer: D
It was the Diners Club card.
Frank McNamara founded it in 1950 after finding himself without cash at a New York restaurant. It began with 200 members and fourteen restaurants, and was the first card accepted by many different merchants rather than a single store.
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What 'game' was first produced by the Southern Novelty Company in Baltimore, Maryland in 1892?
Answer: C
It was the Ouija board.
Elijah Bond patented it in 1891 and the Kennard Novelty Company, later the Southern Novelty Company of Baltimore, produced it. The name is usually said to combine the French and German words for yes.
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Who invented waterproof fabrics ?
Answer: D
Charles Macintosh invented it.
The Glasgow chemist found in 1823 that naphtha, a waste product of the gasworks, dissolved rubber, and sandwiched the solution between two layers of cloth. The waterproof coat still bears his name, with an added k.
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Who invented Fountain Pen?
Answer: C
Lewis E. Waterman invented it.
The insurance salesman patented a fountain pen with a capillary feed in 1884, which let air in as ink flowed out and so stopped the pen from flooding the page.
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Who invented the microphone?
Answer: B
Alexander Graham Bell is credited with it.
His liquid transmitter of 1876 varied the resistance of a circuit with the sound waves striking a diaphragm. Emile Berliner and David Hughes developed the carbon microphone soon afterwards, and Edison improved it for telephone use.
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Who invented waterproof rubberised cloth?
Answer: D
Charles Macintosh invented it.
The Glasgow chemist found in 1823 that naphtha, a waste product of the gasworks, dissolved rubber, and sandwiched the solution between two layers of cloth. The waterproof coat still bears his name, with an added k.
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