Mechanical Wave Producing Device (e.g., Sound, Ultrasound, Vibration, Etc.) Patents (Class 119/719)
  • Patent number: 5307763
    Abstract: A restricted area alarm confinement system includes a loop antenna for placement about the border of an area within which a child or other person is desired to be confined, or excluded from, a control panel for recording a voice command in the parent's voice, and means for generating an RF signal encoded with said prerecorded voice command for transmission over said antenna. A transceiver is mounted to a harness or other support for attachment to the child such that as the child approaches the antenna the parent's voice command is received from the antenna and announced to the child to encourage him to withdraw from the border. A threshold level detector detects when the child approaches even closer to the antenna and the transceiver includes a transmitter section for transmitting a warning signal to a beeper/receiver held by the parent. The control panel further includes monitoring circuits for monitoring the integrity of the loop antenna and the AC power supply.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: May 3, 1994
    Inventors: David L. Arthur, David S. Pohlman
  • Patent number: 5252958
    Abstract: A method and apparatus is provided by which human and dolphin participants may actively progress towards a mutually understandable meaningful communication system. The apparatus includes a three dimensional grid matrix having X and Y electrode wires stacked on top of themselves to form the three dimensional grid. This three dimensional grid system is preferably enclosed in an electrical rheological fluid which is responsive to an electric potential applied across it. The three dimension grid matrix is driven so that selected pixels of the three dimensional grid are activated, and it is thus possible to memorialize or form a three dimensional image of an object or communicable symbols in the electrical rheological fluid.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: October 12, 1993
    Inventor: John J. Daniels