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An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally designed to imitate their sound, or orchestral sounds, it has since developed into several types of instruments: Hammond-style organs used in pop, rock and jazz;
Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most widely used of a number of early messaging systems called telegraphs, that were devised to send text messages more quickly than physically carrying them.
World War II marked the first full-scale war where mechanization played a significant role. Most nations did not begin the war equipped for this. Most nations did not begin the war equipped for this. Even the vaunted German Panzer forces relied heavily on non-motorised support and flank units in large operations.
The Telharmonium (also known as the Dynamophone [1]) was an early electrical organ, developed by Thaddeus Cahill c. 1896 and patented in 1897. [ 2 ] [ 3 ] [ 4 ] The electrical signal from the Telharmonium was transmitted over wires; it was heard on the receiving end by means of " horn " speakers.
The organ is commonly used with, and associated with, the Leslie speaker. The organ was originally marketed and sold by the Hammond Organ Company to churches as a lower-cost alternative to the wind-driven pipe organ, or instead of a piano. It quickly became popular with professional jazz musicians, who found it a cheaper alternative to the big ...
At the end of World War II, the Post Office restarted their move to automatic switching, which had been put on hold for the duration. Automatic switching was established in 1947 and sowed the seed of the international telex network that developed from 1970 onwards. Telex, standing for "telegraphy exchange", was a switched network of ...
This causes less demand on switch contacts. An organ using electro-pneumatic action was more reliable in operation than early direct electric organs until improvements were made in direct electric components. [2] A disadvantage of an electro-pneumatic organ is its use of large quantities of thin perishable leather, usually lambskin.
The machine gun emerged as a decisive weapon during World War I. Picture: British Vickers machine gun crew on the Western Front. Technology during World War I (1914–1918) reflected a trend toward industrialism and the application of mass-production methods to weapons and to the technology of warfare in general.