Whistling device of a cooker lid

A whistling device for a cooker comprising a cooker lid, a screw cork, an annular block, a handle block, characterizes in that

• (a) the cooker lid is circular and has a center opening allowing the screw cork to pass through it and then fix to a screw hole of a protrusion at the bottom of the handle block, an annular rim at the bottom of the screw cork is urged against the circumference of the center opening;
• (b) the screw cork has a center projection having a venting hole along the projection and at the center thereof and the outer surface of the projection is threaded such that the screw cork can pass through the center opening, two air-guiding slots are provided along the inner wall of the venting hole such that a steel bead within the venting hole will not block the venting hole but air can be released through the guiding slots, the size of the venting hole is adaptable for a steel bead or a whistle, and the steel bead is used to control the volume of sound produced by the released air from the cooker and control the time of cooking, the bottom of the screw cork is provided with a recess facilitating the mounting of the screw cork or dismantling of the screw cork, hot air is passed to a guiding hole in the lateral wall of the protrusion of the handle block via the venting hole;
• (c) the annular block is circular and has a circular opening, the size of the opening is adaptable for the protrusion at the bottom of the handle block, and an air hole, corresponding to the guiding hole in the lateral wall of the protrusion, aligns with an air outlet at the lateral wall of the handle block and a protruded arch is provided along the circumference of the annular block and above the air hole, the arch can be mounted to an arch-shaped slot which is provided above the air outlet, the arch is moveable along the arch-shaped slot to allow opening or releasing of the air outlet;
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• (d) a handle block has an arch-shaped handle diametrically mounted across the edge of the handle block, the air outlet is provided in the lateral wall of the handle block, and the arch-shaped slot is provided above the air outlet, such that the protruded arch can be inserted into and moveable along the slot, the protrusion is provided at the center, bottom of the handle block, and the screw hole is provided in the protrusion for the mounting of the screw cork, the lateral wall of the protrusion is provided with the guiding hole and the guiding hole is corresponding to the air hole in the annular block, thereby, rotating the handle block causes the air hole and the air guiding hole to be in alignment or not to be in alignment so as to control the releasing of the hot air from the cooker, and the whistling device employs the steel bead to control the whistling sound and the cooking time.