Johann Nepenuk Maelzel, through some questionable practices, briefed the idea of Winkel and in 1816 it began to make denominated " Metronomo Maelzel". It has been and it is a great success and it follows to the present time in use. It is made by Swiss, German, French and North Americans who compete to each other abrir business in a field so limited as the one of the metrnomos. The following advances In 1894, Hanson produced metrnomo consisting of a 6 or command baton that can be fit to oscillate to 2/4, 3/4, 4/4/8 and with movements similar to those of a director. In 1909, White Hunter produces metrnomo of pocket with a complex pendular mechanism and whose speed can be fit between 40 and 208 RPM. In 1930, a rocking chair in miniature with a stuck twig of vertical control and that is put in movement in any flat surface, was put in the market. A weight in the tube fit the tempo.
" pulso" he was quiet. With the arrival of the electricity, many types of metrnomos were developed electrically impelled. Models with lights were constructed that flashed that to also mark to the times and the beginning of measurement (Morrison, 1936) and also simple models just by baryta shaking (A.M. English, 1937). Some of them were conceived without having no knowledge of music or the way in which the musicians use the metrnomos. Around 1900, I am constructed first metrnomo of pocket Swiss clock, operating exactly just as a clock of steering wheel-with but with a modification that he was able to fit a rate from 40 to 208 BPM. Reason why is known, the unique survivors on all these attempts to produce metrnomo precise and reliable, that they were acceptable by musicians critics, are the Maelzel types and a clock of pocket, the Cadenzia.