Abstract: An automatic sprinkler head comprising a body with a passageway for fire-extinguishing fluid, a frame extending from the body having a deflector plate opposite the passageway, a closure assembly (including a closure thimble) for closing the passageway, a thermally responsive glass bulb interposed between the closure assembly and the deflector plate, and a means to minimize lodgement of the closure assembly. The means to minimize lodgement of the closure assembly is interposed between the glass bulb and the closure thimble. The means to minimize lodgement is preferably an underground spiral spring and causes the closure assembly and any glass bulb fragments to tumble away from the axis of the passageway when the glass bulb fractures, thus minimizing the possibility of the closure assembly and glass bulb fragments becoming lodged against the deflector plate.

Abstract: A manual actuator comprised of a mounting means, a lever and an arm. The mounting means is adapted for field mounting, as well as for factory mounting, on the fire extinguisher in the proximity of the automatic actuator, without requiring removal of any parts of the automatic fire extinguisher. The lever is attached to the mounting means and is capable of rotating, or pivoting, from left to right or from right to left about the point on the mounting means to which it is attached. The arm may be connected on one end to the lever. When installing the manual actuator, the arm may be positioned on either side of the trigger element of the automatic actuator to permit manual actuation from either the left or right hand side of the fire extingusher, according to the particular positioning needs of the place in which the fire extinguisher is placed. In addition, the lever may be attached to a means to pivot the lever in order to permit remote manual actuation.