Parking lot exit control means

• US 4,101,235 A
• Filed: 06/27/1977
• Issued: 07/18/1978
• Est. Priority Date: 06/27/1977
• Status: Expired due to Term

• Current Assignee: Donald F. Nelson
• Original Assignee: Donald F. Nelson
• Inventors: Nelson, Donald F.
• Primary Examiner(s): Byers, Nile C.
• Application Number:
  US05/810,174
• Time in Patent Office: 386 Days
• Field of Search: 404/6, 49/35, 49/41, 49/49, 49/131
• US Class Current: 404/6
• CPC Class Codes: E01F 13/123 depressible or retractable below the traffic surface, e.g. one-way spike barriers, power-controlled prong barriers
• CPC Class Codes: G07F 17/246 provided with vehicle proximity-detectors detecting hidden masses, e.g. metal detectors, G01V, e.g. G01V3/00; proximity switches per se H03K17/00; traffic control systems G08G1/00

Abstract

An improved parking lot traffic control means comprising an elongate series of tire engaging spikes extending transverse an entering and exit lane; said spikes are carried by an elongate shaft rotatably supported below the surface of the lane to project upwardly therefrom and from the surface of the lane when the shaft is in a normal rotative position; drive means including a reversible electric motor is provided to rotate the shaft to an actuated rotative position where said spikes project horizontally and below the surface of the lane; control means is provided to operate the drive means and includes manually operable actuating switch means at one end of the lane to cause the motor to rotate the shaft from its normal to its actuated position and automobile operated actuating switch means at the other end of the lane to cause the motor to rotate the shaft from its actuated to its normal position.

Claims

1. Traffic control means to control the movement of automobiles into and out of defined areas, the traffic control means including an elongate lane with inlet and outlet ends and a top surface, said lane having one end opening into said area and its other end opening outside said area, an elongate barrier in and extending transverse the lane between the ends thereof, said barrier including an elongate rotatable shaft positioned below the surface of the lane, in a normal rotative position a plurality of tire piercing spikes secured to the shaft in longitudinally spaced relationship and normally projecting upwardly therefrom and upwardly from the surface of the lane;

electric powered operating means at one end of the shaft to rotate the shaft to and from an actuated position where said spikes project horizontally therefrom and occur below said surface, and control means to cause the operating means to sequentially rotate the shaft from its normal to its actuated position and from its actuated position to its normal position and including a control circuit with a primary actuating switching means at the upstream end of the lane and connected in the circuit to cause the operating means to rotate the shaft from its normal to its actuated position and a secondary actuating switching means in the outlet end portion of the lane and connected in the circuit to cause the operating means to rotate the shaft from its actuated to its normal position.

2. The traffic control means set forth in claim 1 wherein said operating means includes a reversible electric motor, a speed reducing gear train driven by the motor and drive means between the gear train and the shaft.

3. The traffic control means set forth in claim 2 wherein said control means circuit includes a first power line to conduct current to the motor to drive the motor in a direction to rotate the shaft from its normal position to its actuated position, a second power line to conduct current to the motor to drive the motor in a direction to rotate the shaft from its actuated to its normal position, first and second cam operated switches in the first and second power lines and cam means rotatable with the shaft and engaging and closing the first cam operated switch when the shaft is in its normal position and is rotating to its actuated position and engaging and closing the second cam operated switch when the shaft is in its actuated position and is rotating to its normal position;

electrically operated switching means connected with a power supply line extending from a power source and with the first and second power lines and normally closed to said first power line and open to the second power line;

said switching means is connected with the second actuating switch to close said second power line when the second actuating switch is operated;

a normally open electrically operated power switch in the power line and connected in the circuit to close when the first actuating switch is operated and to open when the second cam operated switch is opened.

4. The traffic control means set forth in claim 3 wherein said second actuating switching means includes an inducting loop engaged in the outlet end portion of the lane and a detector unit connected with the loop and with the power source;

said detector unit operable to direct current through and to detect current changes in the loop affected by an automobile moving over the loop and to direct an operating current to said switching means when an automobile moves from over the loop.

5. The traffic control means set forth in claim 4 wherein the first actuating switching means is operated by an actuating mechanism operated by predetermined manually executed acts.

6. The traffic control means set forth in claim 1 wherein said shaft is arranged within an elongate upwardly opening box with a flat horizontal cover on a plane substantially common with the surface of the lane and having spike accommodating slot openings;

said shaft is rotatably supported by longitudinally spaced pillow blocks mounted in the box.

7. The traffic control means set forth in claim 6 wherein said spikes are fixed to and project from elongate saddles seated about the shaft and extending between adjacent pillow block;

said saddles are releasably fixed to said shaft.

8. The traffic control means set forth in claim 1 wherein said operating means includes a reversible electric motor, a speed reducing gear train driven by the motor and drive means between the gear train and the shaft, said drive means includes a drive sprocket driven by the gear train, a driven sprocket, coupling means between the driven sprocket and the shaft and a drive chain engaged about and between the sprockets.

9. The traffic control means set forth in claim 8 wherein the coupling means includes a torque tube fixed to and extending from one end of the driven sprocket and slidably engaged about an end portion of the shaft and a drive pin frictionally engaged through registering openings in the tube and the shaft.

10. The traffic control means set forth in claim 9 which includes an upwardly opening housing with a top closure and in which the drive means is mounted and into which the shaft projects, and an elongate upwardly opening box extending from a side of the housing and through which the shaft projects, said box including a cover with slot openings through which the spikes freely project, and pillow blocks for the shaft and mounted in the box.