Vandal proof intercom system for apartment buildings

Abstract

An electronic apartment station intercom unit, housed in a vandal proof enclosure, providing a means for a tenant to communicate with apartment building main entrance door panel and means to unlock said door. This unit has a power storage unit that enables this unit to be compatible with existing apartment building switching units. This power storage unit can be in the form of capacitors. In addition, this unit also contains a timer to shut the intercom unit off after a preset period of time.

1 . An intercom system unit which interfaces with an intercom system of a building the unit comprising: 
 a) at least one energy storage unit for the automatic detection of a potential when presented to the interface;    b) at least one energy storage device for the temporary retention of the detected potential.    
   
   
       2 - 3 . (canceled)