Abstract:
The Electronic Mail Alert System uses infrared emitting diodes and matching detectors to determining the presence or absence of mail. This information is applied to a microcontroller, which provide a coded signal to the transmitter. Each mailbox has its own code and its matching receiver will only accept that unique code. The electronic circuitry will not be seen in the mailbox and everything is automatically done. All the mailperson need to do is deliver the mail as usual.

Description:
CROSS-REFERENCE TO RELATED APPLICATION  
       [0001]     Not Applicable  
       STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT  
       [0002]     Not Applicable  
       REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTOR PROGRAM LISTING COMPACT DISC APPENDIX  
       [0003]     Not Applicable  
       BACKGROUND OF THE INVENTION  
       [0004]     My invention combine the modem technology of electronics, and the traditional service of mail delivery. Presently, a person spends time looking for the mailperson, wait until they think the mailperson have delivered the mail, or wait until they are sure the mailperson have delivered the mail before they go to the mailbox.  
         [0005]     There are other devices that can be used to alert the homeowner of mail delivery. For example, U.S. Pat. Nos. 3,611,333; 6,222,451, and 6,831,888. All of these have one thing in common, they need to be physically attached to an existing mailbox to operate. My invention is different in that it uses infrared emitting diodes and detectors, and the electronic circuitry is contained within a newly designed mailbox. Therefore once the mailbox has been purchased nothing need to be added except batteries. This is more convenient for the homeowners who may not be able to attach the other inventions to their mailboxes.  
         [0006]     Also previous inventions did not consider outgoing mail. The same motion that will alert the homeowner to incoming mail will send a false signal for outgoing mail. My invention has an actuator that will deactivate the electronic circuitry for outgoing mail, thereby preventing false signaling to the receiver in the home.  
         [0007]     My newly designed mailbox consider outgoing mail, and is activated automatically when the mail carrier open and close the mailbox door. This mailbox will let the homeowner know the instant mail has been placed inside their mailbox.  
       BRIEF SUMMARY OF THE INVENTION  
       [0008]     The electronic Mail Alert System uses electronics technology to eliminate the need to guess about the time of mail delivery. Hidden within the unique design of the mailbox are infrared emitting diodes, detectors and a microcontroller. These are just some of the electronic components that allow each mailbox to detect the presence of mail and send a unique coded signal to it matching receiver. After the microcontroller in the receiver verify that it have received the valid coded signal, it will alert the homeowner that mail have arrived. 
     
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS  
       [0009]      FIG. 1  shows the front of the bottom section of the mailbox.  
         [0010]      FIG. 2  shows the right side of the bottom section.  
         [0011]      FIG. 3  shows the cutaway view of the bottom section view from III in  FIG. 1 .  
         [0012]      FIG. 4  shows the top view of the bottom section without the false bottom.  
         [0013]      FIG. 5  shows the side view of actuator  1 .  
         [0014]      FIG. 6  shows the top view of actuator  1 .  
         [0015]      FIG. 7  shows the side view of actuator  2 .  
         [0016]      FIG. 8  shows the top view of actuator  2 .  
         [0017]      FIG. 9  shows the bottom view of the top section of the mailbox.  
         [0018]      FIG. 10  shows the front view of the top section of the mailbox.  
         [0019]      FIG. 11  shows the side view of the false bottom.  
         [0020]      FIG. 12  shows the top view of the false bottom.  
         [0021]      FIG. 13  shows the top view of the receiver.  
         [0022]      FIG. 14  shows the schematic of the electronic circuitry in the mailbox.  
         [0023]      FIG. 15  shows the schematic of the electronic circuitry in the receiver. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0024]     The Electronic Mail Alert System is an electronic mailbox and receiver that will alert a homeowner to when mail have been placed into their mailbox. The mailbox is placed along the curve side as any traditional mailbox, and the receiver is placed in the home at a location of the owner&#39;s discretion.  
         [0025]     The mailbox consist of two sections, a top and a bottom. The two sections slide together to form the complete unit. Hidden within these two sections are the mechanical and electronic components that make the mailbox perform its unique function.  
         [0026]     The receiver is a square box that has its electronic components hidden inside. Atop the box are the components that alert the homeowner to when mail is in the mailbox.  
         [0027]     The mailbox and the receiver is made of plastic using the injection mode technique, or the vacuum mode technique  
         [0028]     Actuator  1  (A 1 ), and actuator  2  (A 2 ), manipulate switch  1  (S 1 ), and switch  2  (S 2 ), respectively. A 2  is reset (pushed in) when there is outgoing mail. This action will deactivate the electronic circuitry, preventing a false signaling to the receiver. When the mailperson open the mailbox door, A 1 , which is controlled by the door, will set A 2 , thereby reactivating the electronic circuitry, which is then controlled by A 1 . A 2  is reset only when there is outgoing mail.  
         [0029]     When the mailperson open the mailbox door, A 1  set S 1 , this action charges C 1 . When the door is closed C 1  apply a positive charge to the gate of transistor  1  (Q 1 ), this activate voltage regulator  1  (VR 1 ), which supply power to the circuitry. Microcontroller  1  (IC 1 ), then activate infrared emitting diode  1  (IED 1 ), who&#39;s light beam is detected by detector  1  (D 1 ). The presence or absence of this light beam indicates the presence or absence of mail. If D 1  detects a light beam there is no mail. If D 1  do not detect a light beam mail is present. This process is repeated for IED 2 , IED 3 , and IED 4  and their corresponding detectors D 2 , D 3 , and D 4  respectively.  
         [0030]     This process is achieved with the aid of a comparator (IC 2 ). When there is no mail, the infrared light causes the detectors to conduct. This produces a voltage drop across the detector&#39;s resistors (R 7 ,R 8 ,R 9 , and R 10 ). This voltage is compare to a reference voltage (R 11  and R 12 ), at the comparator. When the voltage across the detector&#39;s resistors is higher than the reference voltage, IC 2  will produce a positive (high) output. This output is applied to the inputs of IC 1 . IC 1  is programmed to interpret this high input as an indication that there is no mail present. After IC 1  determine that there is no mail present if will automatically turn off.  
         [0031]     When mail is present, there will be a negative (low) voltage across the detector&#39;s resistors. When IC 2  compares this voltage to the reference voltage, IC 2  will produce a low output. This low output is applied to the inputs of IC 1 , which is programmed to interpret this low voltage as an indication of the presences of mail. IC 1  will then turn on the transmitter section of the circuitry and transmit a code that is embedded in the program of IC 1 . Each mailbox will have its own unique code. After the code has been transmitted IC 1  will turn off the transmitter and itself.  
         [0032]     The positive charge that C 1  apply to the gate of Q 1  will keep the electronic circuitry activated for approximately ten seconds. After this time elapse, the electronic circuitry will automatically shut off. This process will ensure that the batteries (B 1 ) will last for approximately six months. The charge, left in B 1 , can be tested by pressing the battery test switch (S 3 ), located at the front of the mailbox. When the light emitting diode (L 1 ), is illuminated the batteries have sufficient charge. If L 1  will not illuminate the batteries need to be replaced.  
         [0033]     The receiver will turn on when there is sufficient light to activate the photodiode (IC 6 ). IC 6  will turn on the voltage regulator (VR 3 ), which will activate the electronic circuitry.  
         [0034]     When the transmitted code from the mailbox is detected by the receiver&#39;s microcontroller (IC 4 ), it is stored in its memory. The received code is then compared to a code embedded in IC 4  memory. If the two codes match IC 4  will activate the mail arrived indicator. The mail arrived indicator will be a musical tune. The tune will play until the homeowner presses a reset button (S 4 ), located on the receiver box to turn off the musical tune and the receiver.  
         [0035]     If the two codes do not match IC 4  will conclude that the code is not from its corresponding mailbox. This process will prevent false signaling if two electronic mailboxes are in close proximity. The receiver will not activate the mail arrived indicator until it receive its matching code.