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 |
| 7407328 | Deformable bearing housing A bearing housing to receive and be deformed around a ball having a predetermined radius R to form a bearing, an inner surface of the bearing housing being generally cup-shaped, having at least approximately circular symmetry around a central axis, and comprising: a... | 08/05/2008 |
| 5009521 | Railway truck and bearing adapter therefor, and method for controlling relative motion between truck components A railway truck and a bearing adapter therefor which provides improved control of relative movement between a railway truck wheelset and the truck side frames supported thereby.... | 04/23/1991 |
| 4428303 | Pedestal wear plate A clip-on wear plate for protecting the downwardly facing surface in the pedestal opening of a side frame of a railway truck. The wear plate is especially adapted to be used on worn pedestal surfaces and comprises either a pair of separate plates or a pla... | 01/31/1984 |
