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Illustration of the Atwood machine, 1905. The Atwood machine (or Atwood's machine) was invented in 1784 by the English mathematician George Atwood as a laboratory experiment to verify the mechanical laws of motion with constant acceleration. Atwood's machine is a common classroom demonstration used to illustrate principles of classical mechanics.
A pedestal sump pump with a float switch. A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float. Another common type is a float that ...
A float ball (in orange color) Liquid level floats, also known as float balls, are spherical, cylindrical, oblong or similarly shaped objects, made from either rigid or flexible material, that are buoyant in water and other liquids.
1784: The Atwood machine, for demonstrating the law of uniformly accelerated motion, invented by George Atwood (1745–1807). c. 1805: First bench micrometer – the "Lord Chancellor", capable of measuring to one ten-thousandth of an inch – invented by Henry Maudslay (1771–1831), a founding father of machine tool technology. [182]
A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit. There are several different basic ...
The last time Jon Cooper coached an international tournament featuring the NHL's best players, the 2016 World Cup of Hockey came with a training camp and a slate of exhibition games to get ready.
A slide-style DIP switch soldered into a printed circuit board (PCB) Schematic symbol for each individual switch. A DIP switch is a manual electric switch that is packaged with others in a group in a standard dual in-line package (DIP). The term may refer to each individual switch, or to the unit as a whole.
A Flick of the Switch 1930–1950. Antiques Electronics Supply, 1990. Pages 62 & 63. ISBN ...