×

Radio controlled speed controller with audible feedback signal

  • US 5,216,337 A
  • Filed: 09/22/1992
  • Issued: 06/01/1993
  • Est. Priority Date: 10/28/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of producing an audible signal for speed controller feedback purposes, the method comprising:

  • providing a speed controller having a receiver line, first and second battery lines, a motor line, means in the form of a drive circuit connected between the first battery line and the motor line for switching between an ON state in which the drive circuit couples the first battery line to the motor line and an OFF state in which the drive circuit decouples the first battery line from the motor line, and means in the form of a microprocessor circuitry connected to the receiver line and the drive circuit for switching the drive circuit under program control between the ON state and the OFF state according to setpoint information received by the microprocessor circuitry from a receiver connected to the receiver line; and

    cycling the drive circuit under program control between the ON state and the OFF state at an audible rate for a controlled period of time at a duty ratio sufficiently small to avoid significant normal motor operation so that current flowing through the drive circuit causes audibly discernible mechanical vibration of at least one of the drive circuit, battery componentry connected to the first and second battery lines, and motor componentry connected to the motor line.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×