Search results
Results from the WOW.Com Content Network
The tower clock of Norwich Cathedral constructed c. 1273 (reference to a payment for a mechanical clock dated to this year) is the earliest such large clock known. The clock has not survived. [ 95 ] The first clock known to strike regularly on the hour, a clock with a verge and foliot mechanism, is recorded in Milan in 1336. [ 96 ]
1656 - Christiaan Huygens builds the first accurate pendulum clock. [6] 1676 - Daniel Quare, a London clock-maker, invents the repeating clock, that chimes the number of hours (or even minutes). [7] 1680 - Second hand introduced
To end this confusion, the name niobium was chosen for element 41 at the 15th Conference of the Union of Chemistry in Amsterdam in 1949. [31] A year later this name was officially adopted by the International Union of Pure and Applied Chemistry (IUPAC) after 100 years of controversy, despite the chronological precedence of the name columbium. [31]
Early time clock, made by National Time Recorder Co. Ltd. of Blackfriars, London at Wookey Hole Caves museum A Bundy clock used by Birmingham Corporation Transport. An early and influential time clock, sometimes described as the first, was invented on November 20, 1888, by Willard Le Grand Bundy, [4] a jeweler in Auburn, New York.
China’s state news agency Xinhua reported earlier this year that CBMM is partnering with universities, research centres and battery makers to improve the use of the rare earth element in lithium ...
The next 3 decades saw the development of quartz clocks as precision time standards in laboratory settings; the bulky delicate counting electronics, built with vacuum tubes, limited their use elsewhere. In 1932 a quartz clock was able to measure tiny variations in the rotation rate of the Earth over periods as short as a few weeks. [39]
It is the first time electronics are used to transmit information and entertainment to the public at large. The same year in Germany an instrumental concert was broadcast on the radio from a long-wave transmitter in Wusterhausen. 1922: J. McWilliams Stone invents the first portable radio receiver.
The torsion pendulum was invented by Robert Leslie in 1793. [3] The torsion pendulum clock was first invented and patented by American Aaron Crane in 1841. [4] He made clocks that would run up to one year on a winding. He also made precision astronomical regulator clocks based on the torsion pendulum, but only four were sold.