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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 |
| 7392117 | Data logging, collection, and analysis techniques A system and method for data logging, collection, and analysis techniques. Logging, collection, and analysis of data relating to the condition of a structure, such as a railway rail. Monitoring the neutral temperature of a railway rail. ... | 06/24/2008 |
| 7292144 | Apparatus and method for contact-less switching An apparatus and method for use with a railroad dragging equipment detecting (DED) system that detects objects hanging from and dragged beneath a train as the train travels along rails of a railroad track. A generator supplies a first signal and is coupled to a magn... | 11/06/2007 |
| 7216558 | Wheel sensor assembly for rail base mounting A rail-mounted, wheel-sensing system is shown having a wheel sensor and a rail mounting platform. The system includes a rugged steel rail clamp including two blocks mounted on the base of the rail by a pair of bolt extending under the rail. One block is connected to... | 05/15/2007 |
| 6696805 | Software-driven motor and solenoid controller An apparatus and method for controlling electrical devices such as electric trains using a computer is disclosed. The invention utilizes standard ports that appear on most computers, and works with standard well-known widely commercially available train s... | 02/24/2004 |
| 6445150 | Software-driven motor and solenoid controller An apparatus and method for controlling electrical devices such as electric trains using a computer is disclosed. The invention utilizes standard ports that appear on most computers, and works with standard well-known widely commercially available train s... | 09/03/2002 |
| 6102340 | Broken rail detection system and method This invention relates to a system and method of detecting a broken rail in a railway system. The track sensing circuitry of the present invention applies a voltage source at each end of a block of rails and senses the current flowing through the circuitr... | 08/15/2000 |
| 5924652 | Island presence detected A reliable and consistent electrical contact path between the rails of a section of railroad track established by the shunting effect of the wheels and axles of a train is ensured by applying time-spaced, short duration electrical pulses to the rails at a... | 07/20/1999 |
| 5752677 | Block occupancy detector for model railroads This invention pertains to model railroads and specifically to the problem of detecting the presence or absence of cars, locomotives, or obstructions which may occupy a particular section of track. Modulated signals of radio frequency are applied to the t... | 05/19/1998 |
| 5740992 | Apparatus for continuously measuring the position of a moving rail vehicle A measuring stretch along a railway track of a transloading system has an array of switches with respective sensors positioned for engagement by a wheel of a railway carriage. The lateral displacement of the railway carriage wheel is prevented by a guide ... | 04/21/1998 |
| 5678789 | Model railroad car position indicator A model railroad car position indicator includes a sensor receptive to the presence of a model railroad car on a track. Control circuitry determines the location of the car relative to a predetermined position on the track and approves initiation of a mod... | 10/21/1997 |
| 5590856 | Complex switch turn-out arrangements using proximity selection A method and apparatus for directing the movement of a train around a model railroad track having one or more turn-outs activated by at least two separate arming signals. Each signal is linked to a specified direction of the turn-outs such as straight, cu... | 01/07/1997 |
| 5529267 | Railway structure hazard predictor A hazard predictor that processes both rail and superstructure measurements to predict some potentially hazardous conditions on a railway structure. Measurement is collected in real time with the aid of fiber optic sensor based linear array mesh, and proc... | 06/25/1996 |
| 5492290 | Model railroad operation using proximity selection An electronic control system for model railroads incorporates electronics which "arms" all railroad track switch turn-outs (here after referred to as "turn-outs") at once, selects and toggles the state of a specific turnout by the approach of a model trai... | 02/20/1996 |
| 5462244 | System for detecting trains A system for detecting one or more vehicles, such as a train, on a rail track, includes at least one optical conductor extending near and parallel to the rail track with a light source and light detector coupled thereto. One or more sensors are coupled to... | 10/31/1995 |
| 5330136 | Railway coded track circuit apparatus and method utilizing fiber optic sensing A railway track circuit system utilizing an optical sensor which emits a vehicle detection light signal when a railway vehicle is present in a track section. A reference light signal is also generated by a light emission source. A detector in optical comm... | 07/19/1994 |
| 5178349 | Railroad signal system An improved railroad signal system is described in which a train is allowed to approach a block even if a red light is activated for the block. A white numbered light is activated indicating the maximum permissible speed of the train. The system includes ... | 01/12/1993 |
| 5158253 | Railway track mounting arrangement An apparatus is disclosed for adjusting the height of a monitor with respect to the rail head of a rail having a first bracket adapted to be connected to the rail and a secured bracket adapted to be connected to the monitor, the brackets are releasably co... | 10/27/1992 |
| 4895324 | Reusable derailment detection and signaling device A portable, reusable derailment signaling device has an elongated base, clamps on each end of the base adapted to affix the base firmly to the pedestals of spaced railroad tracks with the base positioned between the pedestals. Restraining shoulders are lo... | 01/23/1990 |
| 4863123 | Process and system for localizing a mobile unit which travels on a system of railroads A process for localizing a mobile unit on a railway network, with a system that includes: a sensor (R) in the form of radar having an antenna (A) which is integral to the mobile unit and that cooperates with fixed markers (RP) placed alongside the railway... | 09/05/1989 |
| 4820057 | Method and apparatus to contactlessly measure the brake temperatures of passing railroad cars A method is described to contactlessly measure the brake temperatures of passing railroad cars, whereby the temperatures of all current practical brake types, for instance shoe and disk brakes at the wheels, but also of separate brake disks, can be measur... | 04/11/1989 |
| 4387870 | Transit vehicle shunt determination A vehicle signal shunt detection apparatus responds to a first signal to establish the presence of a vehicle including a shunt circuit and then responds to a second signal to establish that the shunt circuit is operating to provide a desired predetermined... | 06/14/1983 |
| 4133506 | Derail signal switch A system for sensing derailment of a remotely controlled engine including a switch integrated with a dead man control circuit for the engine to automatically stop the engine upon activation of the switch. The switch further includes a deformable copper pi... | 01/09/1979 |
