Surgery – Diagnostic testing – Structure of body-contacting electrode or electrode inserted...
Reexamination Certificate
1999-02-16
2001-10-09
Kamm, William E. (Department: 3762)
Surgery
Diagnostic testing
Structure of body-contacting electrode or electrode inserted...
Reexamination Certificate
active
06301494
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a transmitter for collecting human pulse by means of elastic bands which project from the transmitter like wings, have contact surfaces of a transmission unit on their inside and which, in particular, can be stretched around a rib cage by means of a stretch band.
2. Prior Art
Such transmitters are state-of-the-art devices (e.g., Instructions for Use Phase 4 by the company JS Electronic Sports).
For reliable and accurate pulse measurement in humans, it is important to design the transmitter so as to be comprised of the actual transmission unit and flexible bands connected thereto which project from the transmission unit like wings and have the conductive contact surfaces of the transmission unit on their inside and which, in particular, can be stretched around a rib cage by means of an elastic band. In such a way, it can be ensured that there is good electrical contact between the contact surfaces on the inner side of the flexible bands and the skin of the individual under examination, e.g., beneath the pectora muscles. At the same time, the individual under examination should not feel significantly constrained by the flexible bands nor lose the transmission unit when in motion. Contact can be improved by an additional means, the so-called EKG gel. To achieve this, however. it is necessary to coat the contact surfaces with the EKG gel every time prior to use.
SUMMARY OF THE INVENTION
The present invention deals with the problem to design a transmitter with flexible bands and other characteristics in such a way that reliable contact at the contact surfaces on the inner side of the flexible bands is ensured while a wearing of the transmitter still remains comfortable.
Further, in order to ensure comfort, the transmitter with flexible bands should be as lightweight as possible. According to the present invention, this problem is solved in that the flexible bands have holes which widen from the inner side of the flexible bands towards the outside.
Such design of the holes makes the flexible bands, which can in particular be made of rubber, lightweight while maintaining a relatively large contact surface on the inner side of the bands, at least compared with holes commonly found in perforated wrist watch bands and also in heart rate wrist watch bands, which feature constant clear cross sections throughout the thickness of the bands.
Compared with transmitters with unperforated bands, the transmitter with flexible bands featuring holes as described in the present invention has the additional advantage that the skin can perspire through such holes, which leads to increased wearing comfort.
The flexible bands can be designed particularly light in weight while providing relatively good contact on their inner side, according to which the clear cross sections of the holes widen approximately exponentially from the inner side of the bands towards the outside.
The holes are, therefore, relatively large on the outside and very small on the inner side, thus reducing the contact surface only insignificantly. As a result of the exponential shape of the cross sections, the holes are smooth on the inner side of the bands, which is important for good contact. On the outside of the bands, however, the holes are largely rounded off, resulting in the wearing properties on the outside being additionally improved.
In accordance with the invention, however, such advantageous rounding off is also possible in other, non-exponential types of widening of the free cross sections of the holes.
In a simpler version of widening of the free cross sections of the holes, the holes in the bands widen approximately conically towards the outside.
The holes are further advantageously longitudinally formed in the direction of the flexible band. With this shape, the tension transmission properties of the band are favorable in spite of relatively large holes.
Holes that are distributed approximately evenly over the inner side of the elastic band are also favorable in terms of force transmission and contact.
REFERENCES:
patent: 2096564 (1937-10-01), Scholl
patent: 4806411 (1989-02-01), Mattingly, III et al.
patent: 5178163 (1993-01-01), Yewer, Jr.
patent: 5464021 (1995-11-01), Birnbaum
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