Abstract: An improved concealed sprinkler head including a frame having a outlet that is connected to a water line and a valve cap encloses the outlet and is held in the closed position by a thermally responsive mechanism, such as a glass bulb. A preassembled cover plate unit is mounted to the frame after the frame is installed with the water line. The cover plate unit includes an outer tubular sleeve that surrounds the frame and a spring is located within the sleeve and is maintained in a compressed condition by a ring having tabs which engage a recess in the sleeve. The lower edge of the sleeve carries a cover plate which is connected to the sleeve via a fusible metal, such as solder. The ring is provided with a pair of opposed guide channels which receive the side edges of the arms of the frame as the cover plate unit is slid upwardly over the frame.

Abstract: An improved concealed sprinkler head assembly that incorporates a standard pendant-type sprinkler head includes a frame having an outlet that is connected to a water line and a valve cap that encloses the outlet and is held in the closed position by a releasable lever mechanism which includes a fusible metal. The assembly also includes a pre-assembled cover plate unit that consists of a disc having a central opening that is slid upwardly over the frame of the sprinkler head. The cover plate unit also includes a tubular sleeve having a pair of opposed notches which receive projections on the periphery of the disc. A decorative cover plate is secured through a fusible metal, such as solder, to the lower edge of the sleeve, and a coil spring, in a compressed condition, interconnects the upper end of the sleeve with the disc.

Abstract: A side wall sprinkler head including a body defining an outlet to be connected to a water line. A pair of arms extend outwardly from the body and are disposed in a common horizontal plane and the ends of the arms are connected at a junction. A cap encloses the outlet in the body and a releasable link interconnects the cap and the junction. When the sprinkler head is exposed to an elevated temperature the link will release the cap permitting water to be discharged from the outlet. The water is distributed in a desired pattern by a deflector which is connected to the junction. The deflector includes a first vertical section and the upper edge of the vertical section is connected via a reverse bend to a horizontal deflector plate. A central tine extends downwardly from the lower edge of the vertical section and a pair of outer tines are disposed on opposite sides of the central tine and extend diagonally downward from the lower edge of the vertical section.