Motor-driven dishes are popular with enthusiasts.

In the era of mechanical calculators this

The Musée des Arts et Métiers in Paris and the Zwinger museum in Dresden, Germany, exhibit two of his original mechanical calculators.

They were also found in motor-driven mechanical calculators ; the Marchant had several of them.

By the early 1970s electronic pocket calculators ended manufacture of mechanical calculators, although the Curta remains a popular collectable item.

Two sketches of it were discovered in 1957, too late to have any impact on the development of mechanical calculators.

By the 20th century, earlier mechanical calculators, cash registers, accounting machines, and so on were redesigned to use electric motors, with gear position as the representation for the state of a variable.

Companies like Friden, Marchant Calculator and Monroe made desktop mechanical calculators from the 1930s that could add, subtract, multiply and divide.

Over time, during the 1950s and 1960s a variety of different brands of mechanical calculators appeared on the market.

In the 1940s and 1950s, using mechanical calculators, women in an all-female computations group performed trajectory calculations.

The introduction of his Pascaline in 1645 launched the development of mechanical calculators first in Europe and then all over the world.

Gottfried Leibniz ( 1646 – 1716 ), building on Pascal's work, became one of the most prolific inventors in the field of mechanical calculators ; he was the first to describe a pinwheel calculator in 1685 and invented the Leibniz wheel, used in the arithmometer, the first mass-produced mechanical calculator.

With the aid of a cadre of female " data analysts ", including Françoise Ulam, who performed computations on mechanical calculators, and whose efforts were supplemented and confirmed by Everett's use of his slide rule, they carried out laborious and extensive computations of many thermonuclear scenarios.

It was during this trip that Tramiel saw the first digital calculators, and decided that the mechanical adding machine was a dead end.

In order to reduce this workload, mechanical calculators were increasingly common during World War II, including the famous Norden bombsight and the less well known British Mark XIV bomb sight and German Lotfernrohr 7.

The Bell Punch Company ( named after its first product, a ticket punch with a bell used by tram and bus conductors ) had been producing a very successful range of key-driven mechanical calculators of the Comptometer type under the names " Plus " and " Sumlock ", since the 1930s.

Some years earlier, while researching the introduction to his dissertation, he was looking at the mechanical calculators in the Science Museum, London, United Kingdom, and had realised that the future of calculators lay in electronics.

They decided to open an Electronics Development Department, and took on Kitz as the leader of a project to develop an electronic version of the company's mechanical calculators.

The cheapest electronic computer then cost approximately £ 50, 000 ( GBP, about US $ 140, 000 ), but to be competitive with mechanical calculators the target selling price of the electronic calculator was in the range £ 350 to £ 400 ( US $ 980 to 1120 ).

It has been on display surrounded by the mechanical calculators that it was to make obsolete.

It thus gained the right to use the name " Comptometer " and even manufactured mechanical calculators to be sold by Comptometer Corporation in the U. S. A.

Even the 1874 invention of mechanical calculator, Odhner arithmometer, had not replaced them in Russia and likewise the mass production of Felix arithmometers since 1924 did not significantly reduce their use in the Soviet Union.

After James Prescott Joule had determined the mechanical equivalent of heat, Lord Kelvin approached the question from an entirely different point of view, and in 1848 devised a scale of absolute temperature which was independent of the properties of any particular substance and was based solely on the fundamental laws of thermodynamics.

Some early scientists such as Georg Ernst Stahl ( 1659-1734 ) and Francisque Bouillier ( 1813 – 1899 ) had supported a form of animism which life and mind, the directive principle in evolution and growth, holding that all cannot be traced back to chemical and mechanical processes, but that there is a directive force which guides energy without altering its amount.

Interestingly, Vannevar Bush had written in 1936 of " bits of information " that could be stored on the punched cards used in the mechanical computers of that time.

Once the keys had been pressed they were locked down until mechanical contacts in a distributor unit passed over the sector connected to that particular keyboard, when the keyboard was unlocked ready for the next character to be entered, with an audible click ( known as the " cadence signal ") to warn the operator.

When machine translation ( also known as mechanical translation ) failed to yield accurate translations right away, automated processing of human languages was recognized as far more complex than had originally been assumed.

Werner Heisenberg had been an assistant to Niels Bohr at his institute in Copenhagen during part of the 1920s, when they helped originate quantum mechanical theory.

This molecular orbital theory represented a covalent bond as an orbital formed by combining the quantum mechanical Schrödinger atomic orbitals which had been hypothesized for electrons in single atoms.

The Cybermen had replaced much of their bodies with mechanical prostheses and were now supposedly emotionless creatures driven only by logic.

where he wrote that he had found " a true mathematical and mechanical form of all manner of Arches for Building.

The Arithmometer, invented in 1820 as a four-operation mechanical calculator, was released to production in 1851 as an adding machine and became the first commercially successful unit ; forty years later, by 1890, about 2, 500 arithmometers had been sold plus a few hundreds more from two arithmometer clone makers ( Burkhardt, Germany, 1878 and Layton, UK, 1883 ) and Felt and Tarrant, the only other competitor in true commercial production, had sold 100 comptometers.

Daedalus, who cannot stand speaking of the subject, took one of the mechanical bugs he had been tinkering with and threw it off of a cliff.

Although Babbage's design was technically feasible, no one had built a mechanical device to such exacting standards before, so the engine proved to be much more expensive than anticipated.

* In the March 1972 issue of the magazine Shogaku 4-nensei: Doraemon, for some reason, had to go back to the future but fakes a mechanical problem so that Nobita would let him go.

Galileo also performed mechanical experiments, and insisted that motion itself — regardless of whether that motion was natural or artificial — had universally consistent characteristics that could be described mathematically.

Meanwhile, the Fust – Schöffer shop was the first in Europe to bring out a book with the printer's name and date, the Mainz Psalter of August 1457, and while proudly proclaiming the mechanical process by which it had been produced, it made no mention of Gutenberg.

Upon his return to Sweden in 1876, he founded a small mechanical workshop together with his friend Carl Johan Andersson who had also worked at Öllers & Co ..

Both mechanically and electrically fused " land torpedoes " were employed, although by the end of the war mechanical fuses had been found to be generally more reliable.

Nevertheless, by this point the mechanical qualities of the aether had become more and more magical: it had to be a fluid in order to fill space, but one that was millions of times more rigid than steel in order to support the high frequencies of light waves.

* In common with many other complex mechanical devices, Charles Babbage's analytical engine used banks of cams to control each operation, i. e. it had a read-only control store.