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Publication of GB492762ApublicationCriticalpatent/GB492762A/en
492,762. Keyboard switches. CLAYTON, T. L. April 1, 1937, Nos. 9276 and 18295. [Class 38 (v)] [Also in Group XXXVIII] In a musical instrument having tubular bells struck by electromagnetically-operated hammers, the playing contacts may be made by plunger keys q which turn (against the action of spring contacts p<3>) conducting levers p so that insulating pegs p<2> and conducting pegs p<1> thereon are respectively brought out of and into contact with conducting levers o which are in contact with spring contacts o<1> connected to the magnets.