Abstract: A sprinkler head assembly having a sprinkler head with a through bore is coupled to a coupling member having a bore in fluid communication with said through bore of said sprinkler head. One of said sprinkler head and coupling member fits within the other. A groove is formed on the inner member for receiving a portion of a set pin slidingly engaged within the outer member. A seal between the inner and outer member provides a fluid-tight connection.

Abstract: A sensing device for monitoring the presence of a tool or other object on an automatic machine comprises a sensing head adapted to be mounted on the machine. The sensing head has a sensing needle mounted on the output shaft of a reversible motor actuated on each cycle of the automatic machine for movement through a swing angle such that the sensing needle will either contact the monitored object or complete the full swing angle movement resulting in a cycle continue or cycle stop signal to the automatic machine control. The swing angle is manually adjustable by a setting ring on the sensing head for either clockwise or counterclockwise initial rotation of the sensing needle through any desired angle up to 180.degree. degrees.