Patent US4303355A successfully refreshed from Google Patents.
Patent US4016455A successfully refreshed from Google Patents.
← Back to Patent Explorer
US4016455A Expired / Lapsed US ⏱️ 0.0 years remaining

Static eliminator

Assignee: 3M Co
•
Filing: 1975-10-22
•
Granted: 1977-04-05
•
Expires: 1995-10-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A structure affording ease of manufacture and assembly for a static eliminator of the type including an insulated conductor adapted for attachment to a source of high alternating voltage and a plurality of conductive members disposed along the cable insulation and including outwardly projecting needles capacitively coupled to the conductor to afford neutralization of static electrical charges in an area adjacent the needles. The conductive members are formed from a single thin piece of sheet metal and each comprises a channel generally U-shaped in cross section and having an inner surface adapted to engage the periphery of the insulation, with the needle being a U-shaped portion of the sheet metal bent to project away from the channel .

Inventors

  • 👤 Robert W. Christiansen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 13:38
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/04; H01; H01T; H01T19/00; H01T19/04

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 253 words
A static eliminator comprising: a cable including a central conductor adapted for connection to a source of alternating high potential and a thick cylindrical insulating sleeve around the conductor; a plurality of conductive members each including an elongate thin walled channel generally half-cylindrical in cross section, said channel having an outer surface, an inner surface conforming to the outer surface of said insulating sleeve, opposed axially extending edges along junctures of said inner and outer surfaces which edges are spaced to afford free movement of the inner surface of the channel into engagement with the cable in a direction radial of said cable, and a needle connected to said channel and projecting outwardly from said outer surface, said needle being disposed to project generally radially away from said cable when the inner surface of said member is disposed against said insulating sleeve; and an elongate clip formed of a flexible resilient electrically insulating material having a curved wall generally C-shaped in cross section, said curved wall having axially spaced openings adapted to receive the needles of said conductive members with said channels spaced axially along the clip, and said clip being positioned over the channels of said conductive members with said needles in said openings and over said cable with the opposed ends of said wall in engagement with said cable to releasably retain said clip and said conductive members in spaced relationship axially along said cable with the inner surfaces of said conductive members contacting the outer surface of said insulating sleeve.
Claim 2
Dependent Claim 253 words
A static eliminator comprising: a cable including a central conductor adapted for connection to a source of alternating high potential and a thick cylindrical insulating sleeve around the conductor; a plurality of conductive members each including an elongate thin walled channel generally half-cylindrical in cross section, said channel having an outer surface, an inner surface conforming to the outer surface of said insulating sleeve, opposed axially extending edges along junctures of said inner and outer surfaces which edges are spaced to afford free movement of the inner surface of the channel into engagement with the cable in a direction radial of said cable, and a needle connected to said channel and projecting outwardly from said outer surface, said needle being disposed to project generally radially away from said cable when the inner surface of said member is disposed against said insulating sleeve; and an elongate clip formed of a flexible resilient electrically insulating material having a curved wall generally C-shaped in cross section, said curved wall having axially spaced openings adapted to receive the needles of said conductive members with said channels spaced axially along the clip, and said clip being positioned over the channels of said conductive members with said needles in said openings and over said cable with the opposed ends of said wall in engagement with said cable to releasably retain said clip and said conductive members in spaced relationship axially along said cable with the inner surfaces of said conductive members contacting the outer surface of said insulating sleeve.
Claim 3
Dependent Claim 29 words
A static eliminator according to claim 1, wherein the inner surface of the channel of each of said conductive members has an area of at least 50 square millimeters.
Claim 4
Dependent Claim 55 words
A static eliminator according to claim 1, wherein the channel and needle of each of said conductive members are formed from the same piece of sheet metal with said needle being a generally V-shaped portion of said sheet metal bent to project outwardly of the portion of said sheet metal curved to form said channel.
Claim 5
Dependent Claim 77 words
A static eliminator according to claim 1, wherein said means for securing said conductive members to said cable further comprises a second elongate clip of a flexible resilient electrically insulating material comprising a curved wall with a generally C-shaped cross section, the curved wall of said second clip being positioned around the side of said cable opposite said clip formed with said openings with opposed end portions of the curved walls of said clips engaging each other.
Claim 6
Dependent Claim 72 words
A static eliminator according to claim 1, wherein said static eliminator further comprises a rigid conductive tube around said portion of said cable and said conductive members, said tube having an aperture positioned around the longitudinal axis of each of said needles; and said clip has longitudinally extending radially outwardly projecting ribs adapted to engage the inner surface of said tube to position said cable portion and conductive members within said shield.
Claim 7
Dependent Claim 289 words
A static eliminator comprising: a cable including a central conductor adapted for connection to a source of alternating high potential and a thick cylindrical insulating sleeve around the conductor; a plurality of conductive members each formed from a single piece of sheet metal and including an elongate thin walled channel generally half-cylindrical in cross section, said channel having an outer surface, an inner surface of at least 50 square millimeters conforming to the outer surface of said insulating sleeve, opposed axially extending edges along junctures of said inner and outer surfaces which edges are spaced to afford free movement of the inner surface of the channel into engagement with the cable in a direction radial of said cable, and a needle projecting outwardly from said outer surface, said needle being a generally centrally located V-shaped portion of said sheet metal bent to project outwardly of the portion of said sheet metal forming said channel and disposed to project generally radially away from said cable when the inner surface of said conductive member is disposed against said insulating sleeve; and an elongate clip formed of a flexible resilient electrically insulating material having a curved wall generally C-shaped in cross section, said curved wall having axially spaced openings adapted to receive the needles of said conductive members with said channels spaced axially along the clip, and said clip being positioned over the channels of said conductive members with said needles in said openings and over said cable with the opposed ends of said wall in engagement with said cable to releasably retain said clip and said conductive members in spaced relationship axially along said cable with the inner surfaces of said conductive members contacting the outer surface of said insulating sleeve.
Claim 8
Dependent Claim 289 words
A static eliminator comprising: a cable including a central conductor adapted for connection to a source of alternating high potential and a thick cylindrical insulating sleeve around the conductor; a plurality of conductive members each formed from a single piece of sheet metal and including an elongate thin walled channel generally half-cylindrical in cross section, said channel having an outer surface, an inner surface of at least 50 square millimeters conforming to the outer surface of said insulating sleeve, opposed axially extending edges along junctures of said inner and outer surfaces which edges are spaced to afford free movement of the inner surface of the channel into engagement with the cable in a direction radial of said cable, and a needle projecting outwardly from said outer surface, said needle being a generally centrally located V-shaped portion of said sheet metal bent to project outwardly of the portion of said sheet metal forming said channel and disposed to project generally radially away from said cable when the inner surface of said conductive member is disposed against said insulating sleeve; and an elongate clip formed of a flexible resilient electrically insulating material having a curved wall generally C-shaped in cross section, said curved wall having axially spaced openings adapted to receive the needles of said conductive members with said channels spaced axially along the clip, and said clip being positioned over the channels of said conductive members with said needles in said openings and over said cable with the opposed ends of said wall in engagement with said cable to releasably retain said clip and said conductive members in spaced relationship axially along said cable with the inner surfaces of said conductive members contacting the outer surface of said insulating sleeve.
Claim 9
Dependent Claim 72 words
A static eliminator according to claim 6, wherein said static eliminator further comprises a rigid conductive tube around said portion of said cable and said conductive members, said tube having an aperture positioned around the longitudinal axis of each of said needles; and said clip has longitudinally extending radially outwardly projecting ribs adapted to engage the inner surface of said tube to position said cable portion and conductive members within said shield.

References Cited (Backward Citations)

US2392808A Cited
US3283209A Cited
US3443155A Cited
US3887843A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-04-04 1980-10-04 1981-04-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-04-04 1984-10-04 1985-04-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-04-04 1988-10-04 1989-04-05 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag