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US3681612A Expired / Lapsed US ⏱️ 0.0 years remaining

Device for eliminating interference between conductors of high frequency signals

Assignee: Siemens AG
•
Filing: 1971-06-16
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Granted: 1972-08-01
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Expires: 1991-06-16
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Abstract

Abstract A device for eliminating interference between conductors which carry high frequency signals to main supply lines. The device has a metallic housing divided into first and second chambers. The conductors pass through the housing longitudinally and connect to the main supply lines. Highly inductive coils are coupled in series with the conductors in the first chamber, and relatively large value capacitances are coupled from a return conductor to the other respective conductors in both the first and the second chambers. Feed through capacitors are coupled from the housing to each conductor at the partition which divides the housing into the first and second chambers. Also, large resistors are coupled from the return conductor to each other conductor.

Inventors

  • 👤 Willibald Vogl
  • 👤 Johann Kinzler
  • 👤 Gottfried Goessl

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 15:03
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0115

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 168 words
A device for eliminating interference in the main supply lines caused by high frequency producing electronic equipment, in particular by electronic data processing equipments, all of which are connected to a common ground line comprising: a metallic housing having a partition which divides the same into first and second chambers shielded from each other, a plurality of electronic components in the said first and second chamber, means for connecting one end of the said device to the said interference producing equipment and means for connecting the other end of the said device to the said main supply lines, a plurality of capacitors each having a relatively large capacitance value being connected between one of the conductors to the remaining conductors in both said first and second chambers, chokes of high inductivity coupled in series with each of the plurality of conductors in said first chambers, feed throughs for each of the conductors from the first to the second chamber by means of feed through-capacitors of low capacitance value.
Claim 2
Independent Claim 168 words
A device for eliminating interference in the main supply lines caused by high frequency producing electronic equipment, in particular by electronic data processing equipments, all of which are connected to a common ground line comprising: a metallic housing having a partition which divides the same into first and second chambers shielded from each other, a plurality of electronic components in the said first and second chamber, means for connecting one end of the said device to the said interference producing equipment and means for connecting the other end of the said device to the said main supply lines, a plurality of capacitors each having a relatively large capacitance value being connected between one of the conductors to the remaining conductors in both said first and second chambers, chokes of high inductivity coupled in series with each of the plurality of conductors in said first chambers, feed throughs for each of the conductors from the first to the second chamber by means of feed through-capacitors of low capacitance value.
Claim 3
Dependent Claim 44 words
A device in accordance with claim 1 wherein one of the plurality of conductors is a return conductor and wherein each of said capacitors of relatively large capacitancE is connected from said return conductor to each of the remaining of said plurality of conductors.
Claim 4
Dependent Claim 26 words
A device in accordance with claim 2 wherein a relatively small value capacitor is coupled from circuit ground to said return conductor within said first chamber.
Claim 5
Dependent Claim 43 words
A device in accordance with claim 2 wherein a plurality of relatively large value resistors are coupled from the return conductor to respective other ones of said plurality of conductors and wherein a resistor is coupled from circuit ground to said return conductor.
Claim 6
Dependent Claim 33 words
A device in accordance with claim 4 wherein said resistors are connected to the plurality of conductors at the junction point of said chokes and said feed through capacitors within said first chamber.
Claim 7
Dependent Claim 41 words
A device in accordance with claim 1 wherein the chokes are wound together on a single air gap free ring core in such a way that the magnetic flux of each winding is cancelled by the effects of the other windings.
Claim 8
Dependent Claim 226 words
In electronic equipment having a plurality of sources of high frequency signals fed by main supply lines, a device for eliminating interference comprising: a metallic housing having a partition which divides the same into first and second chambers, shielded from each other, a plurality of electronic components in the said first and second chamber, means for connecting one end of the said device to the said interference producing equipment and means for connecting the other end of the said device to the said main supply lines, one of said plurality of conductors being a return conductor, a plurality of capacitors of relatively large capacitance value connected between said return conductor and respective ones of the remaining conductors, a relatively small capacitor connected between the return conductor and circuit ground, feed through capacitors coupled between each of said conductors and the housing at the portion thereof which divides the housing into said first and second chambers, and chokes of high inductivity coupled in series with each of said plurality of conductors in said first chamber, relatively large resistors coupled between the return conductor and respective ones of the other conductors and from the return conductor to circuit ground, said resistors being connected to the other conductors at the junction point of said chokes and said feed through capacitors, whereby the main supply lines are rendered interference free.
Claim 9
Dependent Claim 226 words
In electronic equipment having a plurality of sources of high frequency signals fed by main supply lines, a device for eliminating interference comprising: a metallic housing having a partition which divides the same into first and second chambers, shielded from each other, a plurality of electronic components in the said first and second chamber, means for connecting one end of the said device to the said interference producing equipment and means for connecting the other end of the said device to the said main supply lines, one of said plurality of conductors being a return conductor, a plurality of capacitors of relatively large capacitance value connected between said return conductor and respective ones of the remaining conductors, a relatively small capacitor connected between the return conductor and circuit ground, feed through capacitors coupled between each of said conductors and the housing at the portion thereof which divides the housing into said first and second chambers, and chokes of high inductivity coupled in series with each of said plurality of conductors in said first chamber, relatively large resistors coupled between the return conductor and respective ones of the other conductors and from the return conductor to circuit ground, said resistors being connected to the other conductors at the junction point of said chokes and said feed through capacitors, whereby the main supply lines are rendered interference free.
Claim 10
Dependent Claim 24 words
A device for eliminating interference in accordance with claim 7 wherein said chokes are wound on a single ring core with cancelling magnetic effects.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-08-01 1976-01-31 1976-08-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-01 1980-01-31 1980-08-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-01 1984-01-31 1984-08-01 $7700.00 Window Closed / Lapsed

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