Patents Assigned to L. B. Davis, Inc.
  • Patent number: 4973941
    Abstract: An electronic sound generating device icludes a two-piece housing having a lower casing and a lid. A contact switch, in the form of a conductive rubber cup, is received in the lower casing adjacent a circuit board. Activating contacts on the circuit board face the contact switch. A sound generating element and a touch plate are also received in the lower casing. The touch plate includes a centrally located dome portion that extends through an actuator opening in the lid. The touch plate also includes at least one sound radiating hole. To activate the device, the touch plate is pushed inwardly into the housing. This causes the circuit board, which is capable of limited movement within the housing, to move toward the contact switch. As the activating contacts on the circuit board engage the contact switch, the circuit is completed and the sound generating device is activated.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: November 27, 1990
    Assignee: L. B. Davis, Inc.
    Inventors: Louis B. Davis, Stephen C. K. Kwok