Patents Assigned to James W. Millsap
  • Drill braking system
    Patent number: 4650375
    Abstract: An electric drill safety device is provided for dynamically braking a drill when there is contact between the drill bit and an electrically conductive material. A first direction voltage is applied to the motor winding to turn the motor forward. When contact is detected between the drill bit and an electrically conductive material, voltage to the windings is discontinued momentarily and thereafter a reverse direction voltage is provided to the motor windings for a predetermined time.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: March 17, 1987
    Assignees: James W. Millsap, Peter Miller
    Inventor: James W. Millsap