| 摘要 |
A push button switch for mechanical pre-selection tuning of a radio receiver, consisted of a square type control device(43), shaft pieces(49), and two holding devices supported by tow V-type grooves (63,65). While the disc type yoke(53) is placed at one end of the long groves(51), the compress spting(59) compresses shaft pieces at the other end of the long groove.
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