Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4195939 | Type bar actuating mechanism for a typewriter A typewriter of the kind having an array of typebars each movable by means of a flexible tension element or string connecting the typebar to the shank of a corresponding key, is provided with improved means connecting each string to the associated key. Th... | 04/01/1980 |
