Water storage tank for flush toilets

Apparatus for controlling the quantity of water dispensed from a water storage tank to a flush toilet, comprising:

• a water storage tank having a water discharge opening and a closure therefor;
• a manually operable adjustable timer for setting a predetermined flush time related to said water discharge opening to dispense a predetermined required quantity to flush water from said water storage tank to the flush toilet, said predetermined required quantity of water being related to the item and quantity thereof to be removed from the flush toilet;
• said manually operable timer including a rotatable shaft internal said tank and having a portion thereof extending external of said tank, a cam in said tank positioned on said shaft operatively connected with said connecting means, setting means connected with said shaft for setting the predetermined flush time, said setting means including settable spring means coupled with said shaft and means external of said tank coupled with said shaft for rotation thereof to set said spring for a predetermined flush time, transmission mechanism operatively connected between said settable spring means and said cam, and speed control means operatively connected with said transmission mechanism to control the rotating speed of said cam, and thereby to control the predetermined flush time;
• and,
• connecting means operatively associated with said timer and connected with said closure to remove said closure from said discharge opening to permit the water from said storage tank to enter the flush toilet for said predetermined flush time.