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 |
| 4336970 | Bearings A railway bearing assembly comprising a rotatable axle 14 within a cylindrical bearing liner 12 in a housing is provided with a baffle 40 between the outboard end of the axle and the end of the housing. The baffle 40 defines a space in an upper end region... | 06/29/1982 |
| 4212505 | Bearing assemblies A railway bearing housing has a cylindrical bore in which a cylindrical bearing liner is seated to receive a railway vehicle axle, at least one cavity being formed in the lower part of the housing and extending along the length of the housing to contain l... | 07/15/1980 |
