Patents by Inventor Emil Blum

Emil Blum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4101885
    Abstract: An electronic musical chime device for doors and clocks. The musical chime device includes a printed board circuit or a melody circuit board or musical card having electrical contact areas arranged in a sequential manner corresponding to the musical score of a melody. A tone generating circuit connected to and controlled by the printed board circuit. A movable connecting means sweeps over the contact areas to ground the control circuit. The amplifier and speaker are connected to the tone generating circuit to produce the musical sounds in a melody corresponding to the positioning of the contact areas on the printed board circuit and the speed of the connecting means. The printed board circuit is replaceable to provide various melodies when a main on-off switch is actuated.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: July 18, 1978
    Inventor: Emil Blum