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 |
| 4700170 | Condition sensing rheostat and method of manufacture A wound wire rheostat for a fuel level sender or other condition sensor and its method of manufacture, that eliminate wire snapping by heat staking selected portions of the wire into its plastic support board.... | 10/13/1987 |
| 4069466 | Variable resistance electrical control units An electrical control unit operable as a rheostat or a potentiometer comprising an electrical circuit portion of a resistive electrically conducting material formed on a support in a spiral configuration, a spindle mounted for rotation about the center of... | 01/17/1978 |
