| 摘要 |
Magnetically controlled push button equipped with a magnet 2 which modifies, through approach, the electrical state of one, two or three reed switches 1, 1A, 1B (in a bulb containing a neutral gas). It makes it possible to construct, by assembling an unlimited number of parts, keyboards of all kinds (e.g. keyboards for typewriters, computers etc.). It can operate under the severest climatic conditions whilst affording reliability incomparably superior to the devices containing open-air contacts. <IMAGE>
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