Abstract: A flow controllable spray nozzle comprising a barrel with a pair of symmetrical, helically-inclined slots on the outside surface and a partition plate with a hole formed therethrough disposed inside the barrel, an internally-threaded control ring with an inside diameter greater than the inside diameter of a housing integrated thereunder, depending therefrom, and a plunger secured inside the housing with a threaded nozzle cup screwed on the control ring to define a space therebetween complemental in size and shape to the upper portion of the barrel so as to receive the barrel therein. Each of a pair of symmetrical, threaded holes formed through the housing receives, in order, a cup, a coil spring and a screw with a post projecting therefrom. The cup, being pushed by the reaction force of the spring, is received by and firmly contacts with one of the slots to guide the plunger moving along the slot. A cone is disposed under the plunger.

Abstract: A device which can provide tap water at some specified temperature simply by turning on a hot water knob and a cold water knob. By turning a calibration dial, a control pin can be turned accordingly by which the degree of alignment of a pair of control holes with respect to a pair of spiral grooves is adjusted and a specified temperature of water is obtained. Therefore, once the calibration dial is set, a certain temperature of water can be obtained every time by simply turning on the water knobs and without having to readjust the knobs several times before reaching some desired temperature of water.