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The British decimal halfpenny (p) coin was a denomination of sterling coinage introduced in February 1971, at the time of decimalisation, and was worth 200 of one pound. It was ignored in banking transactions, which were carried out in units of 1p. The decimal halfpenny had the same value as 1.2 pre-decimal pence, and was introduced to enable ...
The British pre-decimal halfpenny, (pronounced / ˈheɪpəni /), once abbreviated ob. (from the Latin 'obulus'), [1] is a discontinued denomination of sterling coinage worth 1 480 of one pound, 1 24 of one shilling, or 1 2 of one penny. Originally the halfpenny was minted in copper, but after 1860 it was minted in bronze.
Shaft collars saw few improvements until 1910 through 1911, when William G. Allen and Howard T. Hallowell, Sr, working independently, introduced commercially viable hex socket head set screws, and Hallowell patented a shaft collar with this safety-style set screw. His safety set collar was soon copied by others and became an industry standard.
The British decimal two pence coin (often shortened to 2p in writing and speech) is a denomination of sterling coinage equalling 2 ⁄ 100 of a pound.Since the coin's introduction on 15 February 1971, the year British currency was decimalised, its obverse has featured four profiles of Queen Elizabeth II. [1]
t. e. Decimal Day (Irish: Lá Deachúil) [1] in the United Kingdom and in Ireland was Monday 15 February 1971, the day on which each country decimalised its respective £sd currency of pounds, shillings, and pence. Before this date, the British pound sterling (symbol "£") was subdivided into 20 shillings, each of 12 (old) pence, a total of 240 ...
Gray's patent introduces the term "reflected binary code" In principle, there can be more than one such code for a given word length, but the term Gray code was first applied to a particular binary code for non-negative integers, the binary-reflected Gray code, or BRGC.
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