Mailbox with automatic signal

Claim 1

IN COMBINATION, A REGULATION RURAL MAILBOX EMBODYING BOTTOM, TOP AND SIDE WALLS, A FIXED END WALL CLOSING A REARWARD END OF SAID MAILBOX, AN OUTWARDLY DOWNWARDLY SWINGING DOOR HINGEDLY MOUNTED AND CLOSING THE FORWARD END OF SAID MAILBOX, A LINEARLY STRAIGHT REARWARDLY DOWNWARDLY SLANTING ELONGATED BAR MEMBER SPACED FROM AND PARALLEL TO AN EXTERIOR SURFACE OF ONE SIDE WALL AND HAVING ITS RECPCTIVE ENDS SECURED BY FORWARD AND REARWARD BOLTS TO SAID ONE SIDE WALL, THE SPACE BETWEEN SAID ONE SIDE WALL AND BAR MEMBER PROVIDING A GUIDEWAY FOR THE STAFF OF A SIGNALLING FLAG AND SAID BOLTS PROVIDING LIMIT STOPS, A SIGNALLING FLAG COMPRISING A RIGID STAFF HAVING A FLAG AT AN UPPER END, THE MEDIAN PORTION OF SAID STAFF BEING BODILY LIFTABLE AND LOWERABLE AND SWINGABLY MOVABLE IN SAID SPACE AND ADAPTED TO AUTOMATICALLY SHIFT FROM A MANUALLY SET FORWARD UPSTANDING FLAG-RAISING FORWARD MAIL PICKUP POSITION TO A REARWARDLY INCLINED FLAG-LOWERING POSITION, SAID MEDIAN PORTION HAVING A KEEPER NOTCH OPENING THROUGH THE FORWARD LONGITUDINAL EDGE OF SAID MEDIAN PORTION ENGAGEABLE WITH AND RELEASABLY SUSPENDED