| 摘要 |
This device uses two solenoids to create a steady, tactile pulse. This pulse conveys a specific beat to the user and therefore conveys tempo in the manner of a metronome. A tempo-signal generating circuit feeds electric pulses to a "t" flip-flop. This flip-flop changes state with each pulse and through relays turns on or off the solenoids. The solenoids are spring loaded and return to place when power is off. This causes a jerk which is conveyed to the user through a belt clip, neck strap, or directly through the wall of the solenoid containing case. By using this invention, time may be kept in a precise manner without the intrusion of light or sound that occurs with other metronomes.
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