Patent ID: 8353357

Claim:
A heat responsive trigger assembly for a sprinkler comprising: a first plate having a bottom face; a second plate including a top face engaging said bottom face; a thermally conductive member disposed between said top and bottom faces and extending beyond a perimeter of at least one of said first and second plates, wherein said thermally conductive member includes at least one aperture; and a heat fusible material securing said first and second plates in an engaged position, wherein at least one of said first and second plates includes a protruding solder dimple in registration with said aperture of said thermally conductive member, said aperture being larger in size than said solder dimple of said at least one of said first and second plates so that a space is disposed between said solder dimple and said aperture, wherein said first and second plates are allowed to disengage in response to said heat fusible material reaching a predetermined temperature, thereby allowing a fire suppressant to discharge from the sprinkler.