Hammond organ
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The Hammond organ is an electric organ invented by Laurens Hammond and John M. Hanert, first manufactured in 1935. Multiple models have been produced, most of which use sliding drawbars to vary sounds
A Hammond C-3 organ
The two manuals of the Hammond B-2
Unlike an American Guild of Organists pedalboard, a console Hammond normally has 25 pedals.
Preset keys on a Hammond organ are reverse-colored and sit to the left of the manuals
Tonewheel
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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 genera
Hammond organ
…in 1935. Multiple models have been produced, most of which use sliding drawbars to vary sounds. Until 1975, sound was created from rotating a metal tonewheel near an electromagnetic pickup, and amplifying the electric signal into a speaker cabinet. The organ is commonly used with the Leslie speaker. Around…
Goldschmidt tone wheel (1910), used as an early beat frequency oscillator
Rheotome-cylinders and electric-brushes used on Telharmonium (1896)