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A Polygraph is a duplicating device that produces a copy of a piece of writing simultaneously with the creation of the original, using pens and ink. Patented by John Isaac Hawkins on May 17, 1803, it was most famously used by the third U.S. president, Thomas Jefferson, who acquired his first polygraph in 1804 and later suggested improvements to ...
Alla breve [alla ˈbrɛːve] – also known as cut time or cut common time – is a musical meter notated by the time signature symbol (a C with a vertical line through it), which is the equivalent of 2. 2. [ 1] The term is Italian for "on the breve", originally meaning that the beat was counted on the breve. [ 2]
Gestetner. The Gestetner is a type of duplicating machine named after its inventor, David Gestetner (1854–1939). During the 20th century, the term Gestetner was used as a verb—as in Gestetnering. [ 1] The Gestetner company established its base in London, filing its first patent in 1879. The business grew, remaining within the control of the ...
Most time signatures consist of two numerals, one stacked above the other: The lower numeral indicates the note value that the signature is counting. This number is always a power of 2 (unless the time signature is irrational), usually 2, 4 or 8, but less often 16 is also used, usually in Baroque music. 2 corresponds to the half note (minim), 4 to the quarter note (crotchet), 8 to the eighth ...
In the 2/4 [march time signature] score there appeared a little [useful melody] in the first half and in the second half there was nothing. I got a piano and I remembered my two tangos composed in 1906 that had not had any success: "La gaucha Manuela" and "Curda completa".
Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers and photocopiers, but for many years they were the primary means of reproducing documents for limited-run distribution. The duplicator was pioneered by Thomas Edison and David ...
v. t. e. A spirit duplicator (also referred to as a Rexograph or Ditto machine in North America, Banda machine or Fordigraph machine in the U.K. and Australia) is a printing method invented in 1923 by Wilhelm Ritzerfeld that was commonly used for much of the rest of the 20th century. The term "spirit duplicator" refers to the alcohols that were ...
Simple time signatures Simple time signatures are usually classified as those with an upper number of 2, 3, or 4. This example shows that each measure is the length of three quarter notes (crotchets). 3 4 is pronounced as "three-four" or "three-quarter time". Compound time signatures