Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5655617 | Elastomeric energy storage system This invention is a means for storing kinetic energy for later use as a driving force. This is accomplished through the use of an elastomeric member that can be multi-strand if desired, trained over a plurality of offset pulleys mounted on a pair of paral... | 08/12/1997 |
| 5029661 | Skateboard with propulsion, visual and aural enhancement A skateboard with propulsion, visual and aural enhancement. The propulsion enhancement is provided by a transmission device which is mounted adjacent at least one wheel of the skateboard. The transmission device includes a spring for storing energy during... | 07/09/1991 |
| 4949814 | Driving mechanism, and vehicle therewith A driving mechanism includes a rotatable support and a stretchable element which is being wound on the support by rotating the latter in one direction, and when the rotatable support is released the stretched element compresses and forcedly rotates the ro... | 08/21/1990 |
| 4813509 | Mechanical energy storage and use system for motor vehicles A system for wheeled land vehicles stores energy in a spring when the vehicle is braking, as when stopping or going downhill, and releases energy stored to help the vehicle engine when starting or when going uphill. A mercury switch can serve as an inclin... | 03/21/1989 |
| 3945453 | Spring power cell for vehicular spring motor A spring motor for providing motive power for vehicles, in particular automobiles, golf carts and the like, includes a plurality of interconnected spirally-wound spring power cells arranged in parallel relation in a supporting frame. Individual power cell... | 03/23/1976 |
