§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0332909A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Selective grounding device for electronic equipment

Assignee: Bull HN Information Systems Italia SpA
•
Filing: 1989-02-25
•
Granted: —
•
Expires: 2009-02-25
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Selective grounding device for electronic equipment comprising a printed circuit board fastened to a grounding frame by a fastening screw inserted in an opening of the board comprising a first conductive pad surrounding the opening and located on the board side contacting the frame, a second and a third conductive pads, insulated from each other surronding the opening on the opposite side of the board, the second pad being electrically connected to the first one, the third pad being electrically connected to the DC ground of the equipment, a washer selectively conductive or insulating, overlaying the second and third pad and clamped on said pads by the fastening screw, so that the DC ground is selectively connected or insulated form the frame ground depending on the washer being conductive or insulating, without need to differentiate, to this purpose, the printed circuit board.

Inventors

  • 👤 Elvio Salvagno

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 10:46
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 123 words
1) Selective grounding device for electronic equipment comprising at least a printed circuit board clamped to a ground frame by means of at least a screw inserted in an opening of the board and screwed on the ground frame, comprising a first conductive pad surrounding said opening and located on the board side contacting the frame, a second and third conductive pads, each other insulated, surrounding said opening on the other board side, the second of said pads being electrically connected to said first one, the third of said pads being electrically connected to the DC ground equipment, and a washer, selectively insulating or conductive, overlaying said second and third pads and clamped onto said second and third pads by said clamping screw.
Claim 2
Dependent Claim 123 words
1) Selective grounding device for electronic equipment comprising at least a printed circuit board clamped to a ground frame by means of at least a screw inserted in an opening of the board and screwed on the ground frame, comprising a first conductive pad surrounding said opening and located on the board side contacting the frame, a second and third conductive pads, each other insulated, surrounding said opening on the other board side, the second of said pads being electrically connected to said first one, the third of said pads being electrically connected to the DC ground equipment, and a washer, selectively insulating or conductive, overlaying said second and third pads and clamped onto said second and third pads by said clamping screw.
Claim 3
Dependent Claim 81 words
2) Selective grounding device as in claim 1, wherein said washer consists in an insulating substrate bearing on one side a conductive material layer, the connection between DC ground and frame ground being obtained by inserting said washer on said clamping screw with the conductive material layer contacting said second and third pads, the insulation between DC ground and frame ground being obtained by inserting said washer on said clamping screw with the insulating substrate contacting said second and third pads.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag