Electricity: electrical systems and devices – Discharging or preventing accumulation of electric charge
Patent
1992-11-04
1994-10-18
Dellinen, A. D.
Electricity: electrical systems and devices
Discharging or preventing accumulation of electric charge
361220, H02B 116
Patent
active
053573960
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an earth discharge carrier, intended to be used in a device for damping and discharging electrostatical fields from monitor screens, keyboards and similar objects, and also for reducing existing magnetic fields emitted from a monitor screen.
It is previously known, for example with regard to a monitor screen, to apply an electrically conductive layer, which, even when dry, maintains electrically conductive properties, thereby achieving an antistatic layer, intended to prevent or reduce formation of an electrostatical field. It is also known, e.g. by SE-A-457 583, to combine such a layer with a surrounding metal spring earth discharge carrier, in order to improve the earth discharge carrying effect.
However, to use a metal spring, arranged surrounding a monitor screen and in contact with the electrically conductive layer applied against the screen surface, requires that supporting means for the metal spring first are applied against the screen surface, and also that the installation is performed by skilled personnel. The design is also not very attractive from aestethical point of view, and with regard to modern monitor screens, in which the substantial entirety of the monitor screen forms an actively used viewing surface, the outer portions can be hidden by the metal spring and/or the supporting means.
The present invention relates to a device of the above stated type, in which an earth discharge carrier is used which facilitates quick and simple installation by unskilled personnel, and in which the earth discharge carrier does not, as previously, reduce the effective and viewable area of the screen. The earth discharge carrier according to the present invention may also for example be used at a keyboard to facilitate earth connection of same, and for discharging electrostatical fields from the keyboard. The earth discharge carrier according to the present invention is used in a device intended to dampen and discharge electrostatical fields from a monitor screen, a keyboard or similar object, and also to reduce existing magnetic fields emitted from a monitor screen, the object from which discharge is intended to be carried out being given an electrically conductive layer by application of a substantially liquid antistatic medium, from which electric discharge to an earth connection point is carried out by means of an earth discharge carrier located adjacent to the layer, electrically connected to an earth connection point by means of an electric conductor connected to the earth discharge carrier, and it is mainly characterized in that the earth discharge carrier comprises of a substantially stripshaped member of rubber, synthetic rubber, plastic or similar flexible material with elastic properties, attachable against the object in question by means of a layer of adhesive material applied against the earth discharge carrier, preferably protected by means of a removable protective tape prior to mounting, the earth discharge carrier being arranged to establish an electric connection with the electrically conductive layer applied against the object by means of direct galvanic contact and/or capacitive coupling.
Examples of embodiments of an earth discharge carrier according to the present invention will be more fully described below with referense to the accompanying drawings, in which:
FIG. 1 is a perspective view of a monitor screen, including an earth discharge carrier according to the invention;
FIG. 2 is a cross-sectional view, and in enlarged scale, of an earth discharge carrier suitable for use according to FIG. 1;
FIG. 3 is a view corresponding to FIG. 2, but with the earth discharge carrier applied against the monitor screen;
FIG. 4 is a perspective view of a keyboard with an earth discharge carrier for electrostatical fields according to the invention;
FIG. 5 is a cross-sectional view, and in enlarged scale, of an embodiment of an earth discharge carrier suitable for use according to FIG. 4;
FIG. 6 is a view corresponding to FIG. 5 of a further embodiment of an earth
REFERENCES:
patent: 4321653 (1982-03-01), Takahashi
patent: 4333123 (1982-06-01), Moulden
patent: 4468702 (1984-08-01), Jandrell
patent: 4586106 (1986-04-01), Frazier
patent: 4745517 (1988-05-01), Pitts
patent: 4745518 (1988-05-01), Fang
patent: 4848353 (1989-07-01), Engel
patent: 4849851 (1989-07-01), Cubbison, Jr.
patent: 4862315 (1989-08-01), Cubbison, Jr.
patent: 4981544 (1991-01-01), Nordale
patent: 4985719 (1991-01-01), Tsurukawa et al.
patent: 5289336 (1994-02-01), Gagliano
Dellinen A. D.
Ganjoo Peter
LandOfFree
Earth discharge carrier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Earth discharge carrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth discharge carrier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2376731