Circuit configuration for the controlled filling and refilling of containers with liquids

Apparatus for supplying water, on demand, to a carbonator tank in a dispenser system, comprising:

• (a) system reset switch means for generating a first water demand signal for initiating a first filling operational mode of said tank;
• (b) liquid level sensor means for sensing when the level of water falls below a predetermined level in said tank;
• (c) means coupled to said sensor means for generating a second water demand signal for initiating a second filling operational mode of said tank;
• (d) control circuit means including timer means generating first and second time period signals, respectively, and enabled by said first and second water demand signals, said first period signal being longer in duration than said second period signal, said timer periods being of a predetermined duration to prevent overloading and damage to system components including water supply means in the event of a malfunction, such as an interruption of supply water to said tank;
• (e) water supply means for supplying water to said carbonator tank from an external source;
• and
• (f) means responsive to said first and second time period signals for activating said water supply means for each of said first and second time periods, separately, and thereafter deactivating said supply means.