Automatic pendulum-drive system
First Claim
1. A swing comprisinga support stand,a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation so that the swing seat frame is displaced angularly in a first swing direction to a first extreme position and then displaced angularly in a second swing direction to a second extreme position during each cycle of swinging movement of the swing seat frame along the swing arc,impulse means for applying a torque to the swing seat frame for a predetermined time interval so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc to sustain swinging movement of the swing frame back and forth along the swing arc, andmeans for actuating the impulse means at an actuation position of the swing seat frame located along the swing arc and between the first and second extreme positions that is not fixed relative to the support stand following free-swinging movement of the swing seat frame in the second swing direction from the first extreme position toward the second extreme position and to the actuation position so that said torque is applied to the swing seat frame for said predetermined time interval during swinging movement of the swing seat frame from the actuation position toward the second extreme position.
3 Assignments
0 Petitions
Accused Products
Abstract
A swing includes a swing motor and an adaptive control system for periodically actuating the swing motor to sustain swinging pendulum movement of a seat along a swing arc in a manner that is compatible with the natural frequency (and period) of the seat. The swing further includes a support stand and a swing seat frame mounted on the support stand to carry the seat. The adaptive control system includes an impulse mechanism that applies a torque to the swing seat frame and that is actuated at a variable point along the swing arc between first and second extreme positions and without regard to the position of the swing seat frame relative to the support stand.
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Citations
57 Claims
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1. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation so that the swing seat frame is displaced angularly in a first swing direction to a first extreme position and then displaced angularly in a second swing direction to a second extreme position during each cycle of swinging movement of the swing seat frame along the swing arc, impulse means for applying a torque to the swing seat frame for a predetermined time interval so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc to sustain swinging movement of the swing frame back and forth along the swing arc, and means for actuating the impulse means at an actuation position of the swing seat frame located along the swing arc and between the first and second extreme positions that is not fixed relative to the support stand following free-swinging movement of the swing seat frame in the second swing direction from the first extreme position toward the second extreme position and to the actuation position so that said torque is applied to the swing seat frame for said predetermined time interval during swinging movement of the swing seat frame from the actuation position toward the second extreme position.
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21. A swing comprising
a support stand, a timer mechanism, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction and an opposite second swing direction, and means coupled to the swing seat frame for applying a torque to the swing seat frame for a predetermined time interval set by the timer mechanism so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc to sustain swinging movement of the swing seat frame back and forth along the swing arc.
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22. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction and an opposite second swing direction, and impulse means coupled to the swing seat frame for applying a torque to the swing seat frame for a predetermined time interval so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc to sustain swinging movement of the swing seat frame back and forth along the swing arc, the impulse means including an impulse-start switch coupled to the swing seat frame for movement therewith, an electric swing motor having a motor-on condition and a motor-off condition, an impulse-start contact electrically coupled to the electric swing motor and positioned to engage the impulse-start switch during swinging movement of the swing seat frame along the swing arc, and means for electrically coupling the impulse-start switch to the electric swing motor so that the electric swing motor is switched to the motor-on condition to generate the torque in response to engagement of the impulse-start switch and the impulse-start contact.
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25. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction and an opposite second swing direction, and impulse means coupled to the swing seat frame for applying a torque to the swing seat frame for a predetermined time interval so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc to sustain swinging movement of the swing seat frame back and forth along the swing arc, the impulse means including an electric swing motor having a motor shaft, a torque-transmission linkage coupled to the motor shaft of the electric swing motor and to the swing seat frame and configured to apply a torque to the swing seat frame about the axis of rotation in response to energization of the electric swing motor to move the motor shaft, and a timer circuit configured to energize the electric swing motor periodically for the predetermined time interval to generate said angular impulse.
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28. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction to a first extreme position and an opposite swing direction to a second extreme position during each cycle of swinging movement of the swing seat frame along the swing arc, torque drive means for applying a torque to the swing seat frame as it swings along the swing arc, the torque drive means including an electric swing motor startable to generate the torque, and timer means for starting and then stopping the electric swing motor only once during each swing cycle to cause the swing motor to generate the torque only for a predetermined time interval during movement of the swing seat frame along the swing arc between the first and second extreme positions, which predetermined time interval is less than the interval of time required for the swing seat to swing in one of the swing directions between the first and second extreme positions during swinging movement of the swing seat frame in one of the first and second swing directions along the swing arc.
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29. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction to a first extreme position and an opposite swing direction to a second extreme position during each cycle of swinging movement of the swing seat frame along the swing arc, torque drive means for applying a torque to the swing seat frame as it swings along the swing arc, the torque drive means including a swing motor startable to generate the torque, and motor control means for periodically supplying power to and then stopping the supply of power to the swing motor to cause the swing motor to generate the torque only for a predetermined time interval, which predetermined time interval is less than the interval of time required for the swing seat to swing in one of the swing directions between the first and second extreme positions during swinging movement of the swing seat frame in one of the first and second swing directions along the swing arc.
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42. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing freely back and forth along a swing arc about an axis of rotation in a first swing direction and an opposite second swing direction, an electric swing motor having a motor shaft and having a motor-on condition and a motor-off condition, an impulse-start contact mounted in a fixed position on the support stand and electrically coupled to the electric swing motor, an impulse-start switch coupled to the swing seat frame for movement therewith and positioned to engage the impulse-start contact during swinging movement of the swing seat frame along the swing arc, a motor circuit electrically coupling the impulse-start switch to the electric swing motor so that the electric swing motor is switched to the motor-on condition to rotate the motor shaft to generate a torque about the axis of rotation in response to engagement of the impulse-start switch and the impulse-start contact, a torque-transmission linkage coupled to the motor shaft of the electric swing motor and to the swing seat frame and configured to apply the torque to the swing seat frame about the axis of rotation in response to switching of the electric swing motor to the motor-on condition, and a timer circuit coupled to the motor circuit and configured to allow the electric swing motor to remain in the motor-on condition for a predetermined time interval during swinging movement of the swing seat frame in a first direction along the swing arc to move the motor shaft so that the swing seat frame is subjected to an angular impulse as it swings along the swing arc in the first direction to sustain swinging movement of the swing seat frame back and forth along the swing arc.
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56. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing along a swing arc about an axis of rotation between spaced-apart first and second extreme positions, and a mechanism coupled to the swing seat frame, the mechanism including a torque-producing system and first and second contacts, the swing seat frame being configured to link to the first contact in one of the first and second extreme positions and link to the second contact when the swing seat frame is spaced apart from the first and second extreme positions, the torque-producing system initiating application of a swing force to the swing seat frame when the swing seat frame links to the second contact.
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57. A swing comprising
a support stand, a swing seat frame mounted on the support stand to swing along a swing arc about an axis of rotation between spaced-apart first and second extreme positions, and a mechanism coupled to the swing seat frame, the mechanism including a torque-producing system and an actuator system, the actuator system activating the torque-producing system to initiate application of a swing force to the swing seat frame when the swing seat frame is spaced apart from the first and second extreme positions.
Specification