Electronic gate control
AssigneesMary A. Baldwin, Bernard J. Favaro, Sandra Roberts
InventorGregory F. Phipps
Life of this patent
Estimating the term…
Abstract
A logic control and safety circuit for an electrically actuated gate, or the like. Upon command, a counter directs pulses from a free running oscillator of selective frequency to timer and motor control circuitry, effecting sequential gate operations. The normal gate sequence includes open, pause, and close cycles. Electro-mechanical and electrical safety features are included should the gate encounter an obstruction during either the open or the close cycles, or fail to complete a cycle for any reason. Automatic reset circuitry advances the gate through a "close" cycle following a power failure.
Claims14
A control device for use with a gate having an opening and closing system which includes a reversible electric drive motor, comprising:
- a. detector means for providing a first start pulse, initiating the gate opening cycle;
- b. oscillator means for producing repetitive control pulses;
- c. control counter means interconnected to said oscillator means for sequential distribution of a predetermined series of opening control pulses in response to said first start pulse, and for sequential distribution of a predetermined series of closing control pulses in response to a second start pulse, for controlling the opening cycle and the closing cycle, respectively;
- d. motor direction control means, responsive to a first opening control pulse for interconnecting the motor field in a forward drive mode, and responsive to a first closing control pulse for interconnecting the motor field in a reverse drive mode;
- e. reverse control timer means, activated by a second opening control pulse for producing said second start pulse to initiate, following said opening cycle and a pause cycle, said predetermined series of closing control pulses;
- f. motor actuation means responsive both to a third opening control pulse and to a third closing control pulse, for activating the motor during said opening and closing cycles, respectively;
- and,
- g. limit stop means for sensing a fully open position of the gate and deactivating said motor actuation means for terminating said opening cycle, and for sensing a fully closed position of the gate and deactivating said motor activation means for terminating said closing cycle.
Dependencies are inferred from the claim text.