Patent Publication Number: US-2011068733-A1

Title: Electronic vampire

Description:
BACKGROUND ON THE INVENTION 
     Field of Invention 
     In reading TIME MAGAZINE it was discovered that all charging devices are left plugged in to the outlet even when nothing is being charged. They went on to say this uses about 1% of all electricity and will probably continue to rise as more items are being thought of that require being charged. The invention can be used in other systems using transformers. 
     OBJECT AND ADVANTAGE 
     The object here is to keep the plug in module from using electricity when nothing on the secondary circuit is being charged or used. 
     SUMMARY 
     There are two additional wires in the cable,  301  &amp;  302  ,that activate the primary source,  103 , and keep it active as long as something is plugged in the charging unit (charger),  200 . 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  Typical charging unit (do not mean only this kind). 
         FIG. 2  Schematic of plug in device  100 . 
         FIG. 3  Schematic of charging unit  200 . 
         FIG. 4  Connecting cable  300 . 
     
    
    
     REFERENCE NUMBERS IN DRAWING 
     The table below lists the reference numbers in the figures.
       100  Plug in source.     101  Relay (or any electronic device serving the same purpose).     102  Transformer     103  Primary of transformer.     104  Secondary of transformer.     150  AC/DC Converter (Alternating Current to Direct Current)     200  Charging receptacle for unit being charged.     201  Any switch that is activated when unit being charged is plugged in.     202  Contact points to item being charged.     300  Cable.     301  Circuit being used to activate primary.     302  Completing the circuit to activate the primary.     303  Supplies power to item being charged.     304  Completing the circuit for the item being charged.   

     DETAILED DESCRIPTION 
     The objective is to cut off power to the primary circuit  100 . This is accomplished by controlling the primary circuit from the secondary (Charger  200 ). The secondary has control via the switch  201 , in the charger  200 . The switch closes the circuit of  301  &amp;  302 . When relay  101  is activated then the primary  103  is activated producing power to the secondary  104 . The AC power generated in the secondary is then converted by the AC/DC converter  150  thus supplying power to the unit being charged via wires  303  at  304 .