Sleep state inhibited wake-up alarm
US4228806A · kind A · utility
96Cited by
3References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | May 25, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/50
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wake-up alarm is set to ring in some time interval. One or more physical characteristics of the sleeping subject, including brain wave activity, pulse rate, REM activity, muscle tension, body temperature, hearing acuity, positional changes and the like are monitored to determine whether the subject is in a deep or shallow-sleep phase. If the subject is in the deep-sleep phase throughout the alarm time interval, the alarm is inhibited until the end of the alarm interval. The inhibiting of the alarm ends as soon as the subject goes into a shallow-sleep phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.