Deposit and collection receptacles – Letter boxes – Signals
Patent
1989-12-05
1991-01-22
Johnson, Blair M.
Deposit and collection receptacles
Letter boxes
Signals
232 35, B65D 9100
Patent
active
049864670
ABSTRACT:
A mailbox delivery signal apparatus includes a signal assembly coupled to a detection assembly. The signal assembly has a signal mast attached at one end to a wheel biased to an upright position by a torsion spring. The wheel is pivotally mounted on a hub attached to a housing attached to an outer surface of a sidewall of the mailbox. The housing includes a stop for engaging the signal mast and preventing further rotation past the upright "mail present" signalling position. The signal mast is maintained in the down "mailbox empty" signalling position by a spring biased pin which engages a detent recess formed in the periphery of the wheel. The detection assembly includes an arm pivotally mounted within the mailbox which arm rotates when an object is placed in the mailbox. The arm is coupled to the pin so that rotation of the arm moves the pin out of engagement with the detent recess in the wheel, permitting the torsion spring to rotate the signal mast to the upright signalling position.
REFERENCES:
patent: 842767 (1907-01-01), Clark
patent: 1123647 (1915-01-01), Ackman
patent: 1334106 (1920-03-01), Mackey
patent: 2551915 (1951-05-01), Turner
patent: 3166241 (1965-01-01), Leutheuser
patent: 3275228 (1966-09-01), Golla
patent: 4065050 (1977-12-01), Hunt
patent: 4186870 (1980-02-01), Walden
patent: 4390122 (1983-06-01), Savko
patent: 4570846 (1986-02-01), Morgrey
patent: 4815656 (1989-03-01), Smith et al.
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