Apparatus in medicine for the monitoring and or recording of the body movements of a person on a bed, for instance of a patient
US4320766A · kind A · utility
187Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Mar 10, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/113
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A capacitive motion sensor placed under a mattress or the like for monitoring the movements of a person. The sensor uses an active layer consisting of two courses of dielectric material placed in contact with one another. Movements of a person on top of the mattress cause the courses to move relative to one another, thereby generating an electric change in the active layer which is detected by a pair of spaced elements which form a capacitive antenna means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.