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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7359770 | Control system for operating long vehicles The present invention is directed to a system and method for optimizing the dynamics and energy usage of long vehicles such as freight trains by determining their operating conditions and calculating an optimal sequence of power and braking control actions. The sequ... | 04/15/2008 |
| 6980127 | Trainline controller electronics Trainline controller including testing of signal quality on a trainline network by commanding each node to transmitter calibration signal. A signal detector is connected to the trainline at a common junction with a head end termination circuit. A stuck-on transmitte... | 12/27/2005 |
| 6681161 | Voltage control on a train system The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology i... | 01/20/2004 |
| 6172619 | Automatic train serialization with car orientation A method of serialization including establishing a parameter along a length of the train between a node on one of the cars and one end of the train. The presence or absence of the parameter at each node is determined and the parameter is removed. The sequ... | 01/09/2001 |
| 6144900 | Automatic serialization of an array of wireless nodes based on coupled oscillator model A linking process allows a head-end unit (HEU) of a railroad train to determine the sequence of cars in the train using wireless links between nodes on the cars, and requires no physical connection between the nodes or cars. Each car in the train is equip... | 11/07/2000 |
| 6119056 | Method and apparatus for generating a sensor signal A method and an apparatus for generating a sensor signal related a track-banking angle of a banked section of track traversed by a train car wherein a track-banking angle value basically is determined from measured values of the rolling angular speed and ... | 09/12/2000 |
| 6114974 | Method and apparatus for determining railcar order in a train A method and apparatus for determining railcar order in an ECP equipped train involving the inherent propagation delay of a pneumatic signal propagation in a brake air line as measured by each car and used to determine the car order in the train.... | 09/05/2000 |
| 6112142 | Positive signal comparator and method A signal comparator receives switch-created signals from two stations manned by an engineer and a trainman in a locomotive and compares the signals for a match. The signals are an implementation and acknowledgement of wayside signals. One station is used ... | 08/29/2000 |
| 6049296 | Automatic train serialization with car orientation A method of serialization including establishing a parameter along a length of the train between a node on one of the cars and one end of the train. The presence of the parameter at each node is determined and the parameter is removed. The sequence is rep... | 04/11/2000 |
| 5986577 | Method of determining car position A system and method for determining the position of each railroad vehicle within a train consist. The train consist includes a locomotive, at least one trainline and at least one railroad vehicle. The locomotive has a computer. The at least one trainline ... | 11/16/1999 |
| 5986579 | Method and apparatus for determining railcar order in a train A method and apparatus for determining railcar order in an ECP equipped train involving the inherent propagation delay of a pneumatic signal propagation in a brake air line as measured by each car and used to determine the car order in the train.... | 11/16/1999 |
| 5966084 | Automatic train serialization with car orientation A method of serialization including establishing a parameter along a length of the train between a node on one of the cars and one end of the train. The presence of the parameter at each node is determined and the parameter is removed. The sequence is rep... | 10/12/1999 |
| 5758848 | Automatic switching system for track-bound freight cars An automatic switching system integrated into freight cars includes a microcomputer for controlling the automatic system and regulating the shunting speed, a rotary pulse generator for determining the shunting distance and freight car speed, distance sens... | 06/02/1998 |
| 4944474 | Speed indication system A system and method for indicating the speed of a locomotive during low speed continuous loading and or unloading of bulk materials such as coal. The system utilizes treadle switches which are equally spaced along a track, the treadle switches generating ... | 07/31/1990 |
| 4266273 | System for controlling track-bound vehicles forming a train A system is disclosed for controlling vehicles equipped with computer systems from a center of a rapid transit system. If at least two vehicles equipped with computer systems form a train, and the computer system of the vehicle controlling the train fails... | 05/05/1981 |
