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Safety unit actuating device
| Details |
Inventors: Wicker, James H.;
Assignee: Specialty Manufacturing Co., Inc. (Charlotte, NC)
Primary Examiner: Orsino; Joseph A.
Assistant Examiner: Swarthout; Brent A.
Attorney, Agent or Firm: Shefte, Pinckney & Sawyer
An improved actuating device for school bus safety unit, such as crossing arms and the like, which includes an arrangement for driving and controlling the crossing arm in a continuous predetermined arcuate path of movement, with the safety device being moved continuously back and forth in a sweeping motion that provides a moving barrier in areas adjacent the school bus where children may be placed in an unsafe situation, such as immediately adjacent the front bumper of the bus which is outside of the normal line of vision of the school bus operator. In one embodiment, an extendable line is anchored to the bus at one or both ends, and an intermediate portion of the line is engaged by the moving safety unit, whereby the line itself creates a changing barrier as the safety unit sweeps through its path of movement. A warning arrangement may also be provided to generate a warning signal to the school bus operator whenever the sweeping movement of the crossing arm is stopped or slowed, such as when a child is positioned in the path of movement of the crossing arm. |
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DETAILED DESCRIPTION The present invention relates to an actuating device for operating a safety unit such as a crossing arm or the like which is mounted on a vehicle, such as a school bus, and normally carried at a retracted position adjacent the vehicle.
The actuating device includes an arrangement for mounting the actuating device on the vehicle and a motor having an output drive.
A support is provided for supporting the safety unit (e.
g.
crossing arm) for movement with respect to the vehicle, and this support is arranged to normally dispose the safety unit at a retracted position, and is pivotally movable by the motor to move the safety unit away from its retracted position and through a predetermined path of movement.
A control system is provide which operates the motor to selectively move the support continuously back and forth in a sweeping movement through the aforesaid predetermined path of movement so that the safety unit provides a continuously moving barrier within a predetermined area adjacent the vehicle.
In one preferred embodiment of the present invention, the control system includes limit switches or similar means for determining the outer limits of the predetermined path of movement, and these limit switches or limit means are selectively adjustable to vary at least one of the outer limits of movement so that the path of movement through which the safety unit moves can be selectively varied.
Preferably, the predetermined path of movement is an arcuate path having an included angle between its outer limits that is approximately 165.
degree.
.
The present invention also includes a unique feature by which a warning signal is generated whenever the presence of an object located in the path of movement of the safety unit is detected.
Thus, if a child should inadvertently move into the path of movement of the crossing arm rather than going around the crossing arm, the operator of the school bus will be notified of such condition by virtue of the warning signal generated in accordance with the present invention, and corrective steps can be taken by the operator to assure the safety of the child
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