Radio pager having a light-emitting diode for providing visual alarm and signal transmission

Claim 2

A selective calling radio pager including receive means (20-24) for receiving a calling address signal followed by a message signal transmitted on a radio channel, a memory (26), manual command entry means (13, 15) for generating a command signal, and memory control means (25) for storing the received message signal into the memory (26) and for reading the stored message signal in response to the command signal, characterized in that the receive means (20-24) generates a flashing signal in response to the calling address signal, and a light-emitting diode (11) is provided for receiving the flashing signal in the absence of the command signal to give a visual indication of arrival of a message and receiving the message signal read out of the memory (26) in the presence of the command signal to emit an optical version of the message signal to an external device (17, 15).

Claim 3

A selective calling radio pager as claimed in claim 1, further characterized by a photodetector (17) mounted on the external device for converting an optical signal from the light-emitting diode (11) to a corresponding electrical signal for application to the external device, a second light-emitting diode (75) and means (61, 62, 66, 67, 68, 73) coupled to the photodetector (17) for applying the flashing signal contained in the electrical signal to the second light-emitting diode (75).

Claim 4

A selective calling radio pager as claimed in claim 1, further characterized by: a framing means (42) having a sync generator (43, 44) for generating a sync signal and an end-of-message signal generator (45) for generating an end-of-message signal, the framing means being responsive to the manual command signal for organizing the message signal from the memory into a frame format by appending the sync signal to the starting point of the message signal and appending an end-of-message signal from the receive means (23) to the ending point of the message signal; a photodetector (17) for converting an optical signal from the light-emitting diode (11) into a corresponding electrical signal; a second light-emitting diode (75); and means (61, 62, 66, 67, 68, 73) for detecting the sync signal from the output of the photodetector (17) and coupling the output of the photodetector (17) to the external device (15) and detecting the end-of-message signal from the output of the photodetector (17) and coupling the output of the photodetector (17) to the second light-emitting diode (75).

Claim 5

A selective calling radio pager as claimed in claim 1, 2 or 3, further characterized by means (27) for generating a time signal and storing the time signal into the memory (26) together with the stored message signal.

Claim 6

A selective calling radio pager as claimed in claim 1, 2, 3 or 4, characterized in that the memory control means include means for storing the message signal when the memory (26) is in a read mode and transferring the message signal from the memory control means to the memory (26).

Claim 7

A selective calling radio pager as claimed in claim 1, 2, 3, 4 or 5, characterized in that the external device is a printer.