Mail reception indicating device for handicapped or old people, has wave receiver providing light signal when it receives coded signal sent by wave transmitter when beam from photo electric cell is interrupted by mail

摘要

The device has a wave transmitter positioned inside a letterbox (9) and opposite to a reflective bar (1), and a wave receiver located at a residence. The transmitter transmits a coded signal when a beam transmitted by a photo electric cell towards the bar is interrupted by a mail (3). The receiver provides a light signal when it receives the coded signal, to inform a person about the mail reception.