| 摘要 |
The invention is to be used in combination with a mail box having an open-ended mail receiving compartment and a closure pivotally mounted at the open end of that compartment for opening and closing its open end. The invention is a signalling device comprising signalling means having an indicia bearing portion and an activating portion which overlies at least in part the closure of the mail box when the closure is in its normally closed position. The activating portion of the signalling means is adapted to be engaged by the closure when it is pivoted away from the open end of the mail receiving compartment of the mail box. Retention means for engaging the indicia bearing portion of the signalling means are mounted at a position in relation to the mail box which is remote from the closure, and are adapted to release the indicia bearing portion of the signalling means in response to the force placed on the activating portion of the signalling means by the closure when it is pivoted away from the open end of the mail receiving compartment.
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