Paging device with alternating alert outputs

Details Paging device with alternating alert outputs Paging device with alternating alert outputs

1991-10-08

1993-04-06

Gregory, Bernarr E.

Communications: electrical

Continuously variable indicating

With meter reading

34082546, 3403111, 455 38, G08B 522

Patent

active

H00011738

ABSTRACT:
In a selective call radio paging device, a plurality of alerts are generated in response to the decoding of a message having an address corresponding to the address assigned to the pager. A specific alert envelope waveform is generated and drives an alerting device of a first type (e.g., a transducer). Inverting means is provided to invert the envelope and cause a second alerting device (e.g., visual) to be activated in a manner complementary to the first. Thus, alerting devices are not operated concurrently, and peak loads on a resident power source are avoided.

REFERENCES:
patent: 4392135 (1983-07-01), Ohyagi
patent: 4755816 (1988-07-01), DeLuca
patent: 4876536 (1989-10-01), Matai et al.
patent: 4918438 (1990-04-01), Yamasaki
patent: 4935735 (1990-06-01), DeLuca et al.
patent: 4975693 (1990-12-01), Davis et al.

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