Patents by Inventor Bo Nyman

Bo Nyman 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).

  • Device for generating a synchronous sound referring to a model railway engine
    Patent number: 4266368
    Abstract: A model railway engine carries a loudspeaker which is connected via the running rails to an electronic circuit which drives the loudspeaker to produce sounds simulating a real engine. To achieve synchronization of the sounds with the rotation of the engine wheels, a light diode on the engine emits light which is reflected off the inside of a wheel of the engine onto a phototransistor. The reflecting surface is marked to produce the desired pattern of light pulses at the phototransistor, which is connected to the electronic circuit.
    Type: Grant
    Filed: August 7, 1979
    Date of Patent: May 12, 1981
    Assignee: Alice Nyman
    Inventor: Bo Nyman