Communications: electrical – Tactual indication – With input means
Patent
1978-01-16
1979-12-25
Pitts, Harold I.
Communications: electrical
Tactual indication
With input means
340148, 3403091, G08B 108
Patent
active
041808100
ABSTRACT:
A silent awakening system operable either by receiving a sound-alarm signal, such as that from a fire-detection alarm, or by the actuation thereof by means of an alarm-triggering means of an electric clock, with the sound-producing mechanism of said clock being deactivated. The system is used to awaken deaf persons as well as persons of normal hearing, without disturbing others sleeping in the same room or nearby. It comprises a sound-receiving means which converts said sound to an electric signal to operate an electric relay, an electrical signal-processing circuit connected to said relay and actuated thereby, an electric alarm clock to set the time of awakening with the alarm-triggering means thereof mechanically connected to a switch means disposed in said electrical signal-processing circuit, and an awakening module electrically connected to said electrical signal-processing circuit to receive, for operation thereof, a processed current either through said electric relay or through said switch means actuated by the alarm-triggering means of said clock.
REFERENCES:
patent: 3786628 (1974-01-01), Fossard
patent: 4028882 (1977-01-01), Muncheryan
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