G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 21/18 (2006.01) A47G 29/122 (2006.01) G01N 21/84 (2006.01) G08B 7/00 (2006.01)
Patent
CA 2329972
A device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox, comprising a detector for registering a change of state in the letterbox, which registration is transmitted to and activates a preferably remote display or the like in order to produce on the display a visual and/or audible message which signals that contents have been deposited in said letterbox. The detector is arranged in a preferably integrated mounting unit made in the form of an approximately U-shaped holder that accommodates a circuit board containing electronic components, a light transmitter, a light receiver, and wires and power supply, which unit is placed on the bottom of a container, preferably a letterbox, in such manner that the two upright legs of said holder rest against respective opposite walls of said letterbox. A detector and transmitter unit and a receiver-display unit are also described.
Euro-Tech As
Ridout & Maybee Llp
LandOfFree
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