US2945914A - Vapor seal leadin - Google Patents

Vapor seal leadin Download PDF

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Publication number
US2945914A
US2945914A US780870A US78087058A US2945914A US 2945914 A US2945914 A US 2945914A US 780870 A US780870 A US 780870A US 78087058 A US78087058 A US 78087058A US 2945914 A US2945914 A US 2945914A
Authority
US
United States
Prior art keywords
orifice
flange
leadin
conductor
high pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US780870A
Other languages
English (en)
Inventor
Aamodt Thoralf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US780870A priority Critical patent/US2945914A/en
Priority to DEW26758A priority patent/DE1111255B/de
Priority to GB40897/59A priority patent/GB861366A/en
Priority to FR812859A priority patent/FR1242677A/fr
Priority to JP3882359A priority patent/JPS372684B1/ja
Application granted granted Critical
Publication of US2945914A publication Critical patent/US2945914A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • H01B17/30—Sealing
    • H01B17/303—Sealing of leads to lead-through insulators
    • H01B17/306—Sealing of leads to lead-through insulators by embedding in material other than glass or ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/12—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers
    • H02G15/14—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes for incorporating transformers, loading coils or amplifiers specially adapted for submarine cables

Definitions

  • the invention herein disclosed relates to electrical leadin structures capable of withstanding high pressures such .as are encountered on Vthe sea bottom at depths up to about three miles. More specifically, the invention is concerned with sealed lead-in devices for use between undersea cable and the 'housings of undersea repeaters, equalizers and like assemblies.
  • An object of this invention is the improvement of high pressure, sealed lead-in devices by enhancing their ability to prevent the passage of water vapor therethrough, while maintaining a :high degree of insulation integrity lin the electric circuit, both over a long period of time.
  • a further object of this invention is to facilitate the -joining of a high pressure seal to a cable of lthe kind used in undersea, repeater cable systems.
  • An illustrative embodiment of a seal in accordance with this invention comprises a generally cylindrical outer conductive body of metal having an annular flange or skirt at its high pressure end and a grooved annular shoulder surrounding the flange.
  • the metal body includes a coaxial, through orifice having spaced portions of enlarged diameter. At least one of said enlarged diameter portions, namely, theA one nearest the high pressure end ⁇ of the seal, is frustoconical in contour wit-h its larger diameter toward said high pressure end.
  • a central or inner conductor of metal is located coaxial to the orifice ofthe outer conductor and has spaced protuberances within and matching in contour the enlarged portions of the orifice.
  • the space between the inner and outer conductors is completely filled with insulating material, which extends over the annular flange and into the grooved portion of the annular shoulder surrounding the flange.
  • the outer conductive body may have a contour suitable for attachment to a repeater housing or the like or may be made integral with the housing. As the body and the housing are ordinarily of metal, the attachment if required may be by means of a suitable weld.
  • a feature of this invention resides in a metal conductor and plastic insulation, coaxialv leadin having a long and tortuous interface between said conductor and insulation.
  • Another feature of this invention lies in a coaxial lead- United States Patent O M .body orifice.
  • Fig. l is a longitudinal section of one embodiment of this invention including one frusto-conical ⁇ portion and two disc stopper portions, the lead-in assembly being welded to. a repeater housing, a portion only of which is shown;
  • Fig. 2 is a Vlongitudinal section of another 'embodiment of this invention having two frusto-conical portions land three disc stopper portions;
  • Fig. 3 is a longitudinal section of still another embodiment of this invention :having single frusto-conical and disc portions and in which the end of the body llange is ⁇ inturned;
  • Fig. 4 is a 'longitudinal section of an embodiment o'f this invention having two frusto-conical portions and in which the insulation lis more dense than that of the other three embodiments.
  • Pigs. 2, 3 and 4 have Ibeen shown without any provision for attachment "to 'a repeater or like housing in the interest of simplicityof illustration.
  • Each of these embodiments may be constructed in the manner illustrated in Fig. l, may be otherwise -suitably formed for adequate joinder with whatever means the leadin is to be attached, or the outer conductor may be an integral part of the wall through which the connection is made.
  • this particular embodiment of the vseal of the present invention comprises an outer conductor including a longitudinally oriliced, kgenerally cylindri- ⁇ cal body 1'0 of metal, such as beryllium copper, brass or -the like.
  • An integral flange or skirt 11 projects from gone lend of the body.
  • An annular shoulder 12 surrounding the base of the ilange 11 includes an undercut locking groove v13.
  • the annular shoulder 12 may be made to project as far axially as the skirt '11 forming a deep groove 13, which neednot be undercut as in the illustration.
  • the .ange 11 and that portion of the body 10 adjacent thereto are internally tapered with the outer end the larger.
  • the lianged end of the body comprises the high pressure 'side of the seal.
  • annular pockets or enlargements 14 ofthe pockets may be formed in the body 10 or by means of an internally iianged or doubledished ring 15 intermediate a dished portion of the body .10 and a dis-hed ring 16 threaded into the body.
  • the center conductor comprises a tube or rod '20 of metal having a frusto-conical protuberance 21 and discs 22 secured thereto as by brazing.
  • the protuberance 21 and discs 22 are located within the tapered and pocketed portions of the oriiice, respectively.
  • the inner conductor and its appurtenances may be of beryllium copper, brass or the like.
  • Insulation 17 such as polyethylene, is pressure molded between ⁇ the body 10 and the central conductor 20, over the projecting portions of the latter, on the outside of the tlange 11, and in the undercutv groove 13.
  • the body 10 may be provided with a mounting ring 30 having an annular flange 31 fitting within and welded to a similar flange 32 on a repeater housing 33t, a portion only of which-isshown in Fig. 1.
  • Fig. 2 The embodiment of this invention illustrated in Fig. 2 is similar to that of Fig. l but includes two frusto-conical port-ions 21 and three disc portions 22 on the central conductor with corresponding mating portions within the body orifice. v
  • FIG. 3 Another embodiment of this invention illustrated in Fig. 3 is generally like the embodiments illustrated in Figs. 1 and 2 but with some specific structural differences.
  • the flange 11a has an inturned rim or edge 11b which reduces in diameter the spacing between the inner and outer conductor.
  • This structure increases somewhat the labyrinthian configuration of the metal to insulation interface.
  • the space between the inner and outer conductors must, however, be kept to some safe minimum providing adequate insulation properties.
  • This particular embodiment, having but one disc portion requires no intermediate rings as are used in the previously described embodiments.
  • Fig. 4 is like that shown in Fig. 2 with the disc and 4annular pocket portions omitted.
  • the insulation material 17a in this seal is of a higher density and is more crystalline than that of the other modifications and is consequently less subject to cold flow, which is inhibited by the Stoppers used with the devices made of the less dense and softer insulation.
  • a sealed leadin for making electrical connection through a wall subjected to a high difference of ambient pressure including an outer conductor comprising a generally cylindrical, electrically conductive body having a longitudinal orifice therethrough, an annular flange at its high pressure end, and a grooved annular shoulder surrounding the flange; an inner conductor within said body coaxial to said orifice and extending beyond the ends thereof, said inner conductor having spaced protuberances within the body orifice, the protuberance adjacent the high pressure end being frusto-conical with the larger base toward said end, said orifice having portions of enlarged diameter juxtaposed to the protuberances and of mating configuration thereto; and molded insulating material filling the space between the conductors, extending ofver the extensions of the inner conductor, over the annular flange, and into the groove of the annular shoulder.
  • a sealed leadin for making electrical connection through a wall subjected to a high difference of ambient pressure and including an outer conductor comprising a generally cylindrical, electrically conductive body having a longitudinal orifice therethrough, an annular flange at its high pressure end, and a grooved annular shoulder surrounding the ange; an inner conductor within said body coaxial to said orifice, said inner conductor having spaced protuberances, the protuberance adjacent the high pressure end being frusto-conical with the larger base toward said end, said orifice having portions of enlarged diameter juxtaposed to the protuberances and of mating configuration thereto; and molded insulating material filling the space between the conductors, extending over the annular ange, and into the groove of the annular shoulder.
  • a sealed leadin for making electrical connection through a Wall subjected to ya high difference of ambient pressure including an outer conductor comprising a generally cylindrical and electrically conductive body having a longitudinal orifice therethrough, an annular ange at its high pressure end, and a grooved annular shoulder surrounding the flange; an inner conductor within said body coaxial to said orifice, said inner conductor having spaced protuberances within the body orifice, at least one of the protuberances adjacent the high pressure end being frusto-conical with the larger base toward afil. end,
  • At least one of the protuberances remote from the high pressure end being disc like, said orifice having portions of enlarged diameter juxtaposed to the protuberances and of mating configuration thereto; and molded insulating material filling the space between the conductors, extending over the annular flange, and into the groove of the annular shoulder.
  • a sealed leadin for making electrical connection through a wall comprising a generally cylindrical outer conductor having a longitudinal orifice therethrough, an annular flange at its high pressure end, and a grooved annular shoulder surrounding the flange; an inner conductor within said body coaxial to said orifice, said inner conductor having spaced protuberances within the body orifice, the protuberances adjacent the high pressure end being frusto-conical with their larger bases toward said end, said orifice having portions of enlarged diameter juxtaposed to the protuberances and of mating configuration thereto; and molded insulating material filling the space between the conductors, extending over the extensions of the inner conductor, over the annular flange, and into the groove of the annular shoulder.
  • a coaxial lead-in vapor seal comprising an outer conductor including a generally cylindrical body of metal having an axially directed flange at one end, an annularly grooved shoulder around said flange, and a central axial orifice therethrough; said orifice including a plurality of end-to-end frusto-conical sections having their larger ends toward the fiange; acenter conductor extending axially through said orifice and including frustoconical protuberances at spaced intervals, one within each orifice section; and a body of molded plastic insulation filling the remainder of the orifice and extending over said flange into the annularly grooved shoulder.
  • a coaxial lead-in'vapor seal comprising a generally cylindrical outer conductor having an axially directed fiange at one end, an annularly ⁇ grooved lshoulder around said flange, and an axial orifice therethrough; said orifice including a frusto-conical section having its larger end toward the ange; a center conductor extending axially through said orifice and including a frusto-conical protuberance within said orifice section; and a body of molded plastic insulation filling the remainder of the orifice and extending over said flange into the annularly grooved shoulder.
  • a hermetic seal for an electrical conductor passing through a wall separating a comparatively low pressure chamber from a region of much higher pressure cornprising a generally cylindrical body of metal bonded through said wall, said body having an axially directed flange at its high pressure end, an annularly grooved shoulder around the flange, and an axial orifice therethrough; said orifice including a plurality of enlarged sections, at least that section nearest the high pressure end being tapered with its larger end the high pressure end, said conductor extending axially through said orifice and including protuberances, one within and vcorresponding in contour to each enlarged orifice section; and a body of molded plastic insulation filling the remainder of the orifice and extending over said flange into the annularly grooved shoulder.
  • a hermetic seal for an electrical conductor passing through a wall separating a comparatively low pressure chamber from a region of much higher pressure comprising a generally cylindrical body of metal extending through and bonded to said wall, said body having an axially directed flange at its high pressure end, an annularly grooved shoulder around the flange, and an axial orifice therethrough; said orifice including a plurality of tapered enlarged sections with their larger ends the high pressure ends, said conductor extending axially through said orifice and including protuberances, one within and corresponding in contour to each enlarged orifice section; and a vbody of molded plastic insulation filling therepressure end of the seal, said orifice having enlarged 10 2,661,389

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Cable Accessories (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US780870A 1958-12-16 1958-12-16 Vapor seal leadin Expired - Lifetime US2945914A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US780870A US2945914A (en) 1958-12-16 1958-12-16 Vapor seal leadin
DEW26758A DE1111255B (de) 1958-12-16 1959-11-21 Wasserdichte und druckfeste Durchfuehrung eines Unterwasserkabels durch die Wand eines druckfest gekapselten Gehaeuses von Unterwasserverstaerkern, Ausgleichsmuffen und aehnlichen Geraeten
GB40897/59A GB861366A (en) 1958-12-16 1959-12-02 Seal for a submarine repeater or the like
FR812859A FR1242677A (fr) 1958-12-16 1959-12-11 Dispositif d'étanchéité pour connexions de câbles sous-marins
JP3882359A JPS372684B1 (US07968547-20110628-C00004.png) 1958-12-16 1959-12-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US780870A US2945914A (en) 1958-12-16 1958-12-16 Vapor seal leadin

Publications (1)

Publication Number Publication Date
US2945914A true US2945914A (en) 1960-07-19

Family

ID=25120955

Family Applications (1)

Application Number Title Priority Date Filing Date
US780870A Expired - Lifetime US2945914A (en) 1958-12-16 1958-12-16 Vapor seal leadin

Country Status (5)

Country Link
US (1) US2945914A (US07968547-20110628-C00004.png)
JP (1) JPS372684B1 (US07968547-20110628-C00004.png)
DE (1) DE1111255B (US07968547-20110628-C00004.png)
FR (1) FR1242677A (US07968547-20110628-C00004.png)
GB (1) GB861366A (US07968547-20110628-C00004.png)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018322A (en) * 1960-04-28 1962-01-23 Reliance Gauge Column Co Electrode probe
US3109882A (en) * 1960-05-09 1963-11-05 Frederick L Maltby Insulating means for concentric conductor elements
US3260786A (en) * 1962-08-17 1966-07-12 Felten & Guilleaume Carlswerk Housing arrangement for electrical apparatus in submarine cable installations
US3340173A (en) * 1964-06-02 1967-09-05 Union Carbide Corp Ground anode-to-cable connection
US3441657A (en) * 1966-12-21 1969-04-29 Motorola Inc Semiconductor lead assemblies
US3728466A (en) * 1970-07-17 1973-04-17 Co Ind Telecommunications Cit Coaxial cable having a fluid stop therein and method for producing a coaxial cable which is impervious to the passage of air therethrough
US4253729A (en) * 1978-08-11 1981-03-03 Compagnie Industrielle Des Telecommunications Cit-Alcatel Sealed connection between an optical fibre cable and a submerged housing
US4296996A (en) * 1978-07-18 1981-10-27 Kokusai Denshin Denwa Kabushiki Kaisha Feedthrough for optical fiber
WO2023134951A1 (de) * 2022-01-13 2023-07-20 Schott Ag Elektrische durchführung und durchführungsanordnung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103104A (en) * 1977-07-14 1978-07-25 Bell Telephone Laboratories, Incorporated Anchor assembly for a submarine cable coupling
DE102011001985C5 (de) * 2011-04-12 2016-11-03 R. Stahl Schaltgeräte GmbH Durchführungsanordnung mit hoher Sicherheit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425834A (en) * 1943-03-31 1947-08-19 Sperry Gyroscope Co Inc Coaxial line coupling
US2661389A (en) * 1948-03-22 1953-12-01 Telegraph Constr & Maintenance Electric cable

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR780206A (fr) * 1933-12-06 1935-04-20 Ericsson Telefon Ab L M Perfectionnements aux isolateurs d'introduction
GB643550A (en) * 1948-03-22 1950-09-20 Submarine Cables Ltd Improvements in and relating to sealing devices for submarine electric cables
DE921511C (de) * 1949-01-20 1954-12-20 Hayward Tyler & Co Ltd Fluessigkeitsdichte Durchfuehrung fuer elektrische Leiter
DE1064579B (de) * 1953-07-06 1959-09-03 Vickers Armstrongs Ltd Abdichtung fuer in Verbindung mit UEberseekabeln stehende Unterwasserverstaerker
DE1042691B (de) * 1953-07-10 1958-11-06 Int Standard Electric Corp Fluessigkeitsdichte Durchfuehrung fuer elektrische Leiter durch eine druckfeste Schottwand eines unter hohem Wasserdruck stehenden Tiefseekabelgehaeuses
DE1013739B (de) * 1954-09-22 1957-08-14 Klein Schanzlin & Becker Ag Druck- und fluessigkeitsdichte Durchfuehrung elektrischer Leiter durch eine Wand vonunter hohem innerem Druck stehenden Behaeltern
DE1029065B (de) * 1955-11-25 1958-04-30 Klein Schanzlin & Becker Ag Druck- und fluessigkeitsdichte Durchfuehrung an unter hohem Innendruck stehenden Behaeltern
DE1035716B (de) * 1956-11-26 1958-08-07 Siemens Ag Wasserdichte und druckfeste Einfuehrung eines koaxialen Fernmelde-Tiefseekabels in einen druckfesten Behaelter unter Anwendung einer Glaseinschmelzung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425834A (en) * 1943-03-31 1947-08-19 Sperry Gyroscope Co Inc Coaxial line coupling
US2661389A (en) * 1948-03-22 1953-12-01 Telegraph Constr & Maintenance Electric cable

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018322A (en) * 1960-04-28 1962-01-23 Reliance Gauge Column Co Electrode probe
US3109882A (en) * 1960-05-09 1963-11-05 Frederick L Maltby Insulating means for concentric conductor elements
US3260786A (en) * 1962-08-17 1966-07-12 Felten & Guilleaume Carlswerk Housing arrangement for electrical apparatus in submarine cable installations
US3340173A (en) * 1964-06-02 1967-09-05 Union Carbide Corp Ground anode-to-cable connection
US3441657A (en) * 1966-12-21 1969-04-29 Motorola Inc Semiconductor lead assemblies
US3728466A (en) * 1970-07-17 1973-04-17 Co Ind Telecommunications Cit Coaxial cable having a fluid stop therein and method for producing a coaxial cable which is impervious to the passage of air therethrough
US4296996A (en) * 1978-07-18 1981-10-27 Kokusai Denshin Denwa Kabushiki Kaisha Feedthrough for optical fiber
US4253729A (en) * 1978-08-11 1981-03-03 Compagnie Industrielle Des Telecommunications Cit-Alcatel Sealed connection between an optical fibre cable and a submerged housing
WO2023134951A1 (de) * 2022-01-13 2023-07-20 Schott Ag Elektrische durchführung und durchführungsanordnung

Also Published As

Publication number Publication date
DE1111255B (de) 1961-07-20
FR1242677A (fr) 1960-09-30
GB861366A (en) 1961-02-22
JPS372684B1 (US07968547-20110628-C00004.png) 1962-05-26

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