Patents Assigned to Alice Nyman
  • 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