Patent US4523252A successfully refreshed from Google Patents.
US4523252A
Expired / Lapsed
US
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Device for eliminating static electricity
Assignee: J-O WALLEN ELECTRONIC INT AB
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Filing: 1983-04-19
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Granted: 1985-06-11
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Expires: 2003-04-19
Abstract
Abstract The invention relates to a device, which entirely eliminates static electricity on technical equipment and charged materials. This is effected by using an electric circuit between charging media and machine part, which circuit comprises in series at least one resistor (2), one tunnel diode (3) and one coupling diode (4). A capacitor (5) is connected in parallel over the tunnel diode, and a direct voltage is laid over the resistor (2) and the tunnel diode (3).
Inventors
- 👤 Jan O. Wallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H05; H05F; H05F3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A device for eliminating static charge buildup of a first member from a second member, said device comprising: a series circuit electrically connected to said first member, said series circuit including an electrical resistance and a tunnel diode, said tunnel diode being connected to conduct current away from said first member; a coupling diode connected between said series circuit and said second member and having a polarity to conduct current toward said second member; a capacitor connected in parallel with said tunnel diode; and means for applying a small d.c. voltage across said series circuit to produce current flow through said series circuit in a direction away from said first member.
Claim 2
Independent Claim
111 words
A device for eliminating static charge buildup of a first member from a second member, said device comprising: a series circuit electrically connected to said first member, said series circuit including an electrical resistance and a tunnel diode, said tunnel diode being connected to conduct current away from said first member; a coupling diode connected between said series circuit and said second member and having a polarity to conduct current toward said second member; a capacitor connected in parallel with said tunnel diode; and means for applying a small d.c. voltage across said series circuit to produce current flow through said series circuit in a direction away from said first member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |