Automatic parking lot gate
First Claim
1. For use in connection with a parking lot, a gate bar at the entrance to the lot, normally in an obstructing position, a clearance device ahead of said entrance adapted to receive an authorization means, means to move said gate bar to a non-obstructing position responsive to the reception of such authorization means by said clearance device, vehicle-sensing means in the roadway adjacent said gate bar, means to hold said gate bar in its non-obstructing position while a vehicle is over said sensing means, means to return said gate bar to said obstructing position responsive to the movement of the vehicle away from said sensing means wherein the moving and return means for the gate bar comprises:
- 1. electrically operated drive means provided with a first drive means energizing circuit including the contacts of normally deenergized first relay means,2. normally open first cam switch means coupled to the gate bar and closing in response to the initial operation of the drive means,3. second relay means controlled by said clearance device,4. normally closed second cam switch means coupled to the gate bar,5. a first circuit connected to said first relay means for momentarily energizing same and including the contacts of said second relay means and said normally closed second cam switch means, and6. a second circuit connected to said first relay means for energizing same and including said first cam switch means.
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Accused Products
Abstract
A parking lot gate control system having a pivoted normally horizontal gate bar which is automatically elevated to a raised non-obstructing position and then returned to its normal position by a mechanism driven by an electric motor under the control of a circuit including a clearance device at the entrance to the parking lot consisting of a switch unit operated by an identification card or coin and a car presence-sensing loop in the roadway beyond the clearance device. The circuit operates to raise the gate bar after a proper card or coin has been inserted in the clearance device; thereafter, the vehicle moves onto the loop. The gate bar descends after the vehicle leaves the loop. If another card or coin is inserted in the clearance device by the operator of a second car while the gate bar is descending, the gate bar reverses its downward movement and stays up until the second car has left the loop. If a vehicle obstructs the gate bar on its way down, the motor automatically reverses and returns the gate bar to upright position, and descends only after the vehicle has left the loop. If the entering vehicles are closely following each other, cancellation of the gate bar return signal takes place continuously until the last car leaves the loop.
19 Citations
17 Claims
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1. For use in connection with a parking lot, a gate bar at the entrance to the lot, normally in an obstructing position, a clearance device ahead of said entrance adapted to receive an authorization means, means to move said gate bar to a non-obstructing position responsive to the reception of such authorization means by said clearance device, vehicle-sensing means in the roadway adjacent said gate bar, means to hold said gate bar in its non-obstructing position while a vehicle is over said sensing means, means to return said gate bar to said obstructing position responsive to the movement of the vehicle away from said sensing means wherein the moving and return means for the gate bar comprises:
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1. electrically operated drive means provided with a first drive means energizing circuit including the contacts of normally deenergized first relay means, 2. normally open first cam switch means coupled to the gate bar and closing in response to the initial operation of the drive means, 3. second relay means controlled by said clearance device, 4. normally closed second cam switch means coupled to the gate bar, 5. a first circuit connected to said first relay means for momentarily energizing same and including the contacts of said second relay means and said normally closed second cam switch means, and 6. a second circuit connected to said first relay means for energizing same and including said first cam switch means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A parking lot gate mechanism comprising:
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a. a gate bar at the entrance of the lot, b. a clearance device ahead of said entrance adapted to receive authorization means, c. vehicle sensing means adjacent said gate bar, d. gate control means for moving said gate from an obstructing position to a non-obstructing position in response to reception of authorization means by said clearance device, e. said gate control means operable in response to said sensing means, upon movement of said vehicle away from said sensing means, for moving said gate bar back to an obstructing position, f. said gate control means comprising; 1. motor means connected for moving said gate bar, 2. a first relay, 3. means for operating said first relay in response to said clearance device, 4. a first electrical path for energizing said motor means in response to operation of said first relay, 5. a second relay, 6. means for operating said second relay in response to movement of said vehicle away from said vehicle sensing means, 7. a second electrical path for energizing said motor means in response to operation of said second relay, 8. a third relay having contacts in said first and second electrical paths, said third relay contacts operable to reverse the direction of said motor means, thereby reversing the direction of movement of said gate bar, 9. means for operating said third relay in response to an obstruction while the gate bar is moving to an obstructing position, and 10. means for operating said third relay in response to reception of another authorization means by said clearance device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification