Automatic signal flag attachment for a mailbox

An automatic signal attachment for a mailbox which automatically raises a signal flag to indicate that the mailbox door has been opened. The attachment comprises a lever and pivot assembly for the existing signal flag and a trigger clip and spring assembly to activate the signal flag to a vertical position. The attachment can be used on any standard mailbox now in use.

BACKGROUND OF THE INVENTION 
(1) Field of the Invention 
This invention relates to standard outdoor mailboxes that have signal flags 
to indicate when the mailbox door has been opened 
(2) Description of the Prior Art 
Prior art mailbox devices have used a number of different ways to activate 
and move the signal flag automatically. See for example U.S. Pat. Nos. 
2,874,896; 2,812,130 and 4,202,486. 
U.S. Pat. Nos. 2,874,896 and 2,812,130 show fairly complicated signal 
activation mechanisms which rely on various levers, springs and pins to 
move the signal flag upon opening of the mailbox door. 
Applicant's device requires only three basic components and can be 
retro-fitted to any standard mailbox currently in use. 
U.S. Pat. No. 4,202,486 discloses a spring activated horizontally extending 
lever system that does not suggest applicant's unique combination which 
will be disclosed herein. 
SUMMARY OF THE INVENTION 
An automatic signal attachment for a mailbox allows a standard mailbox to 
be easily converted so that when the door is opened the signal flag will 
automatically raise. The attachment comprises a lever and pivot assembly 
to replace the standard pivot sleeve on the signal flag, a trigger clip 
attached to the edge of the mailbox door to engage the lever, and a spring 
assembly attached to the lever to activate the signal flag when the 
mailbox door is opened.

DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIG. 1 of the drawings, a mailbox 11 can be seen having a 
bottom 12 with integral side walls 13 and 14 extending therefrom forming 
an enclosure, one end of which is closed as at 15 and the other end having 
a pivoted door 16 secured thereto. 
A signal flag 17 is pivotally positioned on the side wall 13 adjacent the 
door 16 and can be moved from a generally horizontal position alongside 
the side wall 13 to a vertical position indicated in dotted lines. An 
automatic signal attachment is comprised of a lever and sleeve assembly 18 
best seen in FIGS. 1,2 and 3 of the drawings, having a bifurcated lever 
member 19, the end of which is enlarged and apertured at 20. The lever 19 
is secured to the apertured lower end of the signal flag 17 by an 
internally threaded sleeve 21, spacing washers 22, and a pair of fastener 
bolts 23. 
Referring to FIG. 3 of the drawings in particular, it will be seen that 
once the signal flag 17 has been removed from the mailbox, it is 
reassembled in the same opening in the side wall 13 by first inserting the 
sleeve 21 therein and placing on it a washer 22, the bifurcated lever 19, 
and one of the bolts 23 on the inside of the mailbox 10. The washer 22, 
the signal flag 17 and remaining bolt 23, are assembled on the sleeve 21 
on the outer side of the side wall 13. This assembly secures the lever 19 
to the signal flag 17 and allows both to move together freely in the side 
wall 13. One branch of the bifurcated lever 19 is apertured at its end 
from which extends a rod 24 as seen in FIG. 1 of the drawings. The rod 24 
is attached to a spring 25, the other end of which is secured to an 
L-shaped mounting clip 26 wedged between the bottom 12 and the closed end 
15. 
A trigger clip 27, as best seen in FIGS. 1 and 4 of the drawings, has a 
U-shaped portion 28 from which extends a flange 29. The flange 29 has a 
tab 30 extending at right angles therefrom parallel to the U-shaped 
portion 28 adjacent its end. The clip 27 is frictionally engaged on an 
upturned lip 31 of the door 16 so as the door is closed it will engage and 
hold the bifurcated lever 19 and attach the signal flag 17 in a 
horizontally stored position. 
In use, when the door 16 is closed, the signal flag 17 is held down along 
the side wall 13 by the trigger clip 27 against the tension of the spring 
25 on the rod 24. When the door is opened, the trigger clip releases the 
bifurcated lever 17 along with the signal flag 17 rotates on the sleeve 21 
moving the signal flag 17 to a raised vertical position that indicates 
that a mailbox door has been opened. 
It will thus be seen that a new and novel mailbox attachment has been 
illustrated and described that can be used to easily convert any standard 
mailbox to an automatic signal flag configuration. 
It will be apparent to those skilled in the art that various changes and 
modifications may be made therein without departing from the spirit of the 
invention, and having thus described my invention,