Fact #179241
When:
Short story:
Theodor Weisser of Neustadt, Schwarzwald, Germany applies for a US Patent for an improved metronome which he has invented. It is described as a metronome, "in which hammerstrokes on a fixed bell are regulated by means of a sliding lever, one end of which I form or provide with a toothed or notched scale to indicate the different measures to which the mechanism for operating the bell is set and at the same time to lock said lever in position."