Patents Assigned to GSBS Development Corporation
  • Sounders for fire alarm systems
    Patent number: 6905001
    Abstract: A sounder is disclosed which has walling (36, 38) defining a first air column (26) leading to a first sound aperture (34) through which the first column opens to atmosphere, and walling (40, 44) defining a second air column (60) leading to a second aperture (64) through which the second column opens to atmosphere. A diaphragm (16) is between the air columns and means are provided for causing said diaphragm to vibrate.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: June 14, 2005
    Assignee: GSBS Development Corporation
    Inventor: Dunstan Walter Runciman
  • Heat detector casing
    Patent number: D475312
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 3, 2003
    Assignee: GSBS Development Corporation
    Inventor: Dunstan Walter Runciman
  • Fire detector casing
    Patent number: D475943
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 17, 2003
    Assignee: GSBS Development Corporation
    Inventor: Dunstan Walter Runciman
  • Fire detector casing
    Patent number: D476252
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 24, 2003
    Assignee: GSBS Development Corporation
    Inventor: Dunstan Walter Runciman