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A tonewheel or tone wheel is a simple electromechanical apparatus used for generating electric musical notes in electromechanical organ instruments such as the Hammond organ and in telephony to generate audible signals such as ringing tone. It was developed by Thaddeus Cahill for the telharmonium c. 1896 and patented in 1897. [1]
Hammond organ manuals and pedalboards were originally manufactured with solid palladium alloy wire to ensure a high-quality electrical connection when pressing a key. [16] This design was discontinued with the introduction of the transistor organ. This means tonewheel organs have between 3.2 and 8.4 grams of palladium, depending on make and ...
Tonewheel organs generate sound by shaped mechanical wheels, that rotate in front of electromagnetic pickups. Each tonewheel assembly creates tones with low harmonic content, close to a sine wave. Inside the coil is a permanent magnet.
A clonewheel organ is an electronic musical instrument that emulates (or "clones") the sound of the electromechanical tonewheel-based organs formerly manufactured by Hammond from the 1930s to the 1970s.
1937 Robb Wave Organ at the National Music Centre in Calgary, Alberta. The Robb Wave Organ is an electronic organ invented in 1927 by Canadian inventor F. Morse Robb in Belleville, Ontario. It uses a unique type of tone wheel synthesis to reproduce pipe organ tones and is one of the first electronic organs ever made. [1]
Frank Morse Robb (January 28, 1902 – October 5, 1992) was a Canadian inventor and entrepreneur who resided in Belleville, Ontario. [1] He is best known for his invention of the first electronic tone wheel organ, the Robb Wave Organ, [2] however he has several patents to his name, in areas such as television, fuel draught carburetors, and for devices such as an 'Electronic Viewscope for the ...
The organ comes with a chrome Z-shaped bolt-on leg stand assembly. [3] The top of the organ is furnished with an orange Rexine cover. [4] The Vox Continental uses six slider-type, metered volume controls called drawbars instead of the stop-tab rocker switches seen on other combo organs.
John Compton Organ Company of Acton – Nottingham and London (now Makin Organs) Copeman Hart Organs — Shaw (now part of ChurchOrganWorld) Eminent UK — Designer of British organs and exclusive distributor of the Eminent brand. Based in Wincanton. Kentucky (a small company based out of Poole, Dorset headed by Ken Tuck.