US3519799A - Hermetically sealed electrical plug-in terminal with mating electrical socket - Google Patents

Hermetically sealed electrical plug-in terminal with mating electrical socket Download PDF

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Publication number
US3519799A
US3519799A US762039A US3519799DA US3519799A US 3519799 A US3519799 A US 3519799A US 762039 A US762039 A US 762039A US 3519799D A US3519799D A US 3519799DA US 3519799 A US3519799 A US 3519799A
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US
United States
Prior art keywords
electrical
terminal
metallic
plug
socket
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
US762039A
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English (en)
Inventor
Glenn Resh Bange
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.)
Pfaudler Inc
Original Assignee
Sybron Corp
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Filing date
Publication date
Application filed by Sybron Corp filed Critical Sybron Corp
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Publication of US3519799A publication Critical patent/US3519799A/en
Assigned to PFAUDLER CO. INC., THE A NEW YORK CORP. reassignment PFAUDLER CO. INC., THE A NEW YORK CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SYBRON CORPORATION A NY CORP.
Anticipated expiration legal-status Critical
Assigned to CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPANY OF CHICAGO, 231 SOUTH LA SALLE ST. CHICAGO, IL 60697 reassignment CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPANY OF CHICAGO, 231 SOUTH LA SALLE ST. CHICAGO, IL 60697 SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PFAUDLER COMPANIES, INC., THE
Assigned to PFAUDLER COMPANIES, INC., A CORP. OF DE reassignment PFAUDLER COMPANIES, INC., A CORP. OF DE ASSIGNS THE ENTIRE INTEREST, EFFECTIVE MARCH 13, 1987 Assignors: KENNECOTT MINING CORPORATION
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5227—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases with evacuation of penetrating liquids

Definitions

  • a plug-in terminal for a sealed heater unit is disclosed.
  • the terminal unit is hermetically sealed by the method of manufacture that is also disclosed which allows the terminal to be completely immersed in water for washing.
  • the terminal comprises a stud welded to the heater substrate with a ceramic tube and a metal sleeve bonded to the welded stud and to each other.
  • a mating female socket having a plurality of flexible fingers spaced around the periphery of the electrical socket.
  • the fingers serve as the receiving means for the mating hermetically sealed terminal plug, with the flexibility allowing the plug to be inserted into the socket with some degree of misalignment.
  • This invention relates generally to an electrical male and female quick-disconnect connections and more particularly to a hermetically sealed male plug-in terminal designed for insertion into a mating female electrical socket having features which allow some degree of misalignment between the male terminal and the female socket.
  • prior art terminals comprise a disc attached to a plurality of twisted wires, with the disc placed in the encapsulating media prior to firing of the structure.
  • the present invention overcomes the difficulties and limitations found in prior art terminals and sockets by providing a hermetically sealed electrical male terminal which has structural strength greater than previous male electrical terminals of the same type.
  • the electrical male terminal of the invention may be used in either fixed heater locations or with heaters used for remote heating as before mentioned.
  • the present invention also provides a mating female socket for the electrical terminal whenever the electrical terminal is used as a plug-in unit.
  • the mating female 'ice socket contains means which allow the male terminal to be inserted therein with some degree of misalignment thereby minimizing breakage of the male terminal or the female socket.
  • Another object of the invention is to provide a new and novel male terminal designed for fixed terminal locations which is structurally strong and which is also hermetically sealed.
  • Still another object of the invention is to provide a female electrical socket designed for a mating male terminal plug with means provided for misalignment between the plug and the socket whenever one is inserted into the other.
  • FIG. 1 is a side sectional view showning a prior art fixed terminal attached to an encapsulated heating unit
  • FIG. 2 is a sectional view of the present invention show ing the hermetically sealed plug-in terminal unit
  • FIG. 3 is an end view of the mating female electrical socket
  • FIG. 4 is a sectional view through the female electrical socket taken along line 4-4 of FIG. 3;
  • FIG. 5 is a side View of a hermetically sealed fixed terminal unit for use with a permanent electrical connection
  • FIG. 6 is a top view of the hermetically sealed electrical terminal of FIG. 5.
  • FIG. 7 is a view greatly enlarged of a portion of the hermetically sealed plug-in terminal unit of FIG. 2 showing the electrical connection of the heating element to the terminal.
  • FIG. 1 there is shown an encapsulated heating unit 10 of a conducting type used with the invention.
  • the heating unit 10 comprises a substrate 12 having a glass or ceramic coating 14 bonded thereto by well known bonding means.
  • the coating 14 may be a multi-layer coating but is shown as a single layer in FIG. 1 for illustrative purposes only.
  • a heating element 16 is encapsulated by the coating 14 and serves as the means for heating the ingredients contained within the substrate 12.
  • a prior art terminal is shown generally at 18 in FIG. 1 and is positioned in the coating 14 prior to the firing of the coating on the substrate 12.
  • the prior art terminal 18 is electrically connected to the heating element 16 by means not shown in the drawing and serves as the terminal unit for electrically connecting a source of power to the heating element 16.
  • ground coat means that layer of enamel or glass which is applied directly to the base metal
  • electrical coat refers to that layer of glass or enamel which is applied over the ground 3 coat and which is in intimate contact with the electrical heating element
  • cover coat refers to that layer of glass or enamel which is applied over the heating element and electrical coat.
  • a ground coat would be a glass composition which adheres to the base metal.
  • the electrical coat being in direct contact with the heating element would be a glass or enamel composition which has a high order of resistivity at high temperature and the cover coat being in direct contact with the atmosphere would have the characteristics of impact and thermal shock resistance to prevent damage to the article, for example, when accidently dropped or when plunged into cold water for cleaning.
  • a metallic stud 26 is rigidly fastened to the substrate 12 by means of weld 28.
  • a metallic cap 32 completely surrounds the insulating sleeve 30 in the manner shown in FIG. 2.
  • the metallic cap 32 contains a hole 34 formed in the base thereof and functioning in a manner which will be hereinafter described.
  • the heating element 16 is encapsulated by the cover coating 24 and the electrical coating 22.
  • the electrical connection between the heating element 16 and the metallic cap 32 is completed by means of a conducting electrical paint 38 which is applied as hereinafter described in the operation of the method of assembling the terminal connection.
  • the insulating sleeve 30 is bonded to the metallic stud 26 by fused glass and the metallic cap 32 is also bonded to the insulating sleeve 30 by fused glass as will be hereinafter more fully described.
  • a terminal plug-in connection is provided having substantial structural strength and also one that may be installed at any angle to the substrate 12 simply by positioning the metallic stud 26 at the desired angle and then welding it to the substrate 12.
  • FIG. 3 there is shown an end view of the mating female socket 40 which comprises an insulating sleeve 42 having an arcuate segment 44 removed from one thereof.
  • the insulating sleeve 42 may be constructed of plastic or some other suitable material, and contains within the insulating sleeve 42, a metallic sleeve 46 having a plurality of flexible fingers 48 spaced around the periphery thereof.
  • the fingers 48 of the metallic sleeve 46 serve as the receiving means for the mating external male electrical plug inserted therein.
  • the metallic sleeve 46 may be constructed of copper or some other suitable material having resilient properties which allow the fingers 48 to grasp the mating electrical plug. This flexibility allows some degree of misalignment between the mating male plug and the female socket without damaging the socket 40 or the male plug. As a result should the heater unit be inserted in the electrical socket 40 in a misaligned manner, the flexibility of the fingers will allow the terminal to be inserted without damage to the female socket 40 or the male plug.
  • FIG. 4 shows the tail-like terminal 50 extending upwardly and positioned within the arcuate segment 44 removed from the insulating sleeve 42.
  • FIGS. and 6 there is shown a hermetically sealed terminal unit for use with a permanently located encapsulated heater unit 10. Since the heater unit is mounted in a permanent position in this embodiment, the mating male terminal shown in FIG. 2, with the female terminal shown in FIG. 4, would not be required.
  • the electrical terminal shown in FIG. 5 is constructed in a manner similar to the plug-in terminal shown in FIG. 2 and in addition contains an outwardly extending wing-like protuberance 52 formed on the base of the metallic cap 32 for connection to an electrical conduit of the electrical circuit.
  • the electrical terminal shown in FIG. 5 would also contain the hole 34 which will be described more fully hereinafter. In addition, it may contain a second hole 54 serving as a means of allowing the electrical conduit of the electrical circuit to be attached to the wing-like protuberance 52.
  • the metallic stud 26 is attached to the substrate 12 by well known welding operations and provides the mechanical strength and rigidity for the terminal to withstand the forces normally encountered during usage of the heater unit 10.
  • the ground coat is applied to the substrate 12 in such thicknesses as desired.
  • short lengths of plastic tubing may be placed over the metallic stud 26 prior to the application of the ground coating 20 to the substrate 12. The plastic tubing may be removed from the metallic stud 26 while the glass coating is still wet.
  • a small predetermined amount of glass slip is applied to the metallic stud 26 by means of an eyedropper or some other suitable instrument.
  • the glass slip serves as the bonding means to bond the ceramic insulating sleeve to the metallic stud 26 when the unit is fired.
  • the ceramic insulating sleeve 30 is positioned over the metallic stud 26 and rotated into the ground coating 20.
  • the terminal unit is then allowed to dry and is fired thereby fusing the insulating sleeve 30 to the metallic stud 26 and the ground coat 20 to the substrate 12.
  • the electrical coat 22 is applied over the ground coat 20 after placing short lengths of plastic tubing over the ceramic insulating sleeve 30 to prevent the electrical coat from coming in contact with the ceramic insulating sleeve 30.
  • the heating element 16 is then positioned on the electrical coating 22 and a small predetermined amount of glass slip is applied to the ceramic insulating sleeve 30 by means of an eyedropper. This small predetermined amount of glass slip serves as the bonding means to bond the metallic cap 32 to the insulating sleeve 30.
  • the metallic cap 32 After applying the predetermined amount of glass slip to the ceramic sleeve 30, the metallic cap 32 is positioned over the ceramic insulating sleeve 30 until it touches the surface of the previously fired ground coat 20. The assembly terminal unit is then allowed to dry and is fired a second time to fuse the electrical coat 22, containing the heating element 16, and to bond the metallic cap 32 to the ceramic insulating sleeve 30. After the second firing to fuse the electrical coat 22, the electrical paint 38 is applied to electrically connect the heating element 16 to the metallic cap 32 and the assembly fired again to dry and fuse the electrical paint.
  • the hole 34 is provided in the metallic cap 32 and serves as a means of venting the air bubbles to atmosphere formed during the firing. Without the hole 34, the bubbles would build-up at thebase of the terminal unit and may break the electrical connection 38 between the terminal and the heater 16. The presence of bubbles in the electrical coating 22 also reduces the dielectric strength of the terminal unit which causes failure during high potential testing of the terminal piece, prior to shipment to the customer.
  • the cover coating 24 is applied to the electrical coat 22.
  • Short lengths of plastic tubing again may be fitted over'the metallic cap 32 to prevent the cover coating 24 from being applied to the metallic cap 32.
  • the cover coating 24 is applied to the desired thickness, the short length of plastic tubing are removed and the cover coating 24 is allowed to dry and is then fired to fuse the cover coating 24 to the electrical coat 22 thereby providing, the hermetically sealed electrical terminal unit.
  • This unit may now be immersed in liquid for cleaning purposes without damaging the electrical parts.
  • the bonding of the various parts of the unit to each other as before mentioned also greatly improves the strength of the terminal unit.
  • a hermetically sealed electrical male plug-in terminal for a ceramic encapsulated electrical heater element comprising:
  • a metallic cap having a hole formed in the base thereof, surrounding said insulating sleeve and bonded thereto, said hole serving as a means of permitting gases formed during the bonding to escape;
  • a female electrical socket comprising:
  • one end of said metallic sleeve having a taillike terminal portion for connection to an electrical conduit, said tail-like portion being positioned within said arcuate segment;
  • said metallic sleeve having a plurality of flexible fingers, spaced around the periphery thereof, said fingers serving as a female receiving electrical socket for a mating external male electrical plug inserted therein and also serving to allow misalignment between said plug and said socket when said plug is inserted and removed from said socket.
  • An electrical quick-disconnect assembly for a ceramic encapsulated electrical heat element comprising:
  • a metallic cap having a hole formed in the base thereof, surrounding said insulating sleeve and bonded thereto, said hole serving as a means of allowing gases formed during the bonding to escape;
  • Electrical quick disconnect assembly unit as defined in claim 4 and further characterized by:
  • a hermetically sealed electrical terminal for a ceramic encapsulated electrical heater element comprising:
  • a metallic cap having a hole formed in the base thereof surrounding said insulating sleeve and bonded thereto, said hole serving as a means of allowing gases formed during the bonding to escape;
  • said metallic cap containing an outwardly extending wing-like protuberance formed on the base thereof for connetcion to an electrical conduit;
US762039A 1968-09-24 1968-09-24 Hermetically sealed electrical plug-in terminal with mating electrical socket Expired - Lifetime US3519799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76203968A 1968-09-24 1968-09-24

Publications (1)

Publication Number Publication Date
US3519799A true US3519799A (en) 1970-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
US762039A Expired - Lifetime US3519799A (en) 1968-09-24 1968-09-24 Hermetically sealed electrical plug-in terminal with mating electrical socket

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US (1) US3519799A (de)
BR (1) BR6912693D0 (de)
DE (1) DE1946987A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035613A (en) * 1976-01-08 1977-07-12 Kyoto Ceramic Co., Ltd. Cylindrical ceramic heating device
US4224505A (en) * 1977-06-03 1980-09-23 Von Roll Ag Electrically welding plastic sleeve
US5658175A (en) * 1995-10-05 1997-08-19 Itt Corporation One-piece hooded socket contact and method of producing same
US6261134B1 (en) 1995-10-20 2001-07-17 Itt Manufacturing Enterprises, Inc. One-piece hooded socket contact and method of producing same
US11381021B2 (en) * 2019-10-07 2022-07-05 Japan Aviation Electronics Industry, Limited Socket contact and connector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426429A (en) * 1945-01-06 1947-08-26 Hazeltine Research Inc Electrical connector
US2625640A (en) * 1950-08-05 1953-01-13 Libbey Owens Ford Glass Co Multiple glass sheet glazing unit
US3158424A (en) * 1964-02-13 1964-11-24 Itt Contact mounting
US3258734A (en) * 1964-05-26 1966-06-28 Socket for electric jack plugs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426429A (en) * 1945-01-06 1947-08-26 Hazeltine Research Inc Electrical connector
US2625640A (en) * 1950-08-05 1953-01-13 Libbey Owens Ford Glass Co Multiple glass sheet glazing unit
US3158424A (en) * 1964-02-13 1964-11-24 Itt Contact mounting
US3258734A (en) * 1964-05-26 1966-06-28 Socket for electric jack plugs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035613A (en) * 1976-01-08 1977-07-12 Kyoto Ceramic Co., Ltd. Cylindrical ceramic heating device
US4224505A (en) * 1977-06-03 1980-09-23 Von Roll Ag Electrically welding plastic sleeve
US5658175A (en) * 1995-10-05 1997-08-19 Itt Corporation One-piece hooded socket contact and method of producing same
US6261134B1 (en) 1995-10-20 2001-07-17 Itt Manufacturing Enterprises, Inc. One-piece hooded socket contact and method of producing same
US11381021B2 (en) * 2019-10-07 2022-07-05 Japan Aviation Electronics Industry, Limited Socket contact and connector
US11942714B2 (en) 2019-10-07 2024-03-26 Japan Aviation Electronics Industry, Limited Socket contact and connector

Also Published As

Publication number Publication date
DE1946987A1 (de) 1970-04-02
BR6912693D0 (pt) 1973-04-12

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AS Assignment

Owner name: PFAUDLER CO. INC., THE A NEW YORK CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SYBRON CORPORATION A NY CORP.;REEL/FRAME:003939/0779

Effective date: 19811231

AS Assignment

Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA

Free format text: SECURITY INTEREST;ASSIGNOR:PFAUDLER COMPANIES, INC., THE;REEL/FRAME:004848/0128

AS Assignment

Owner name: PFAUDLER COMPANIES, INC., A CORP. OF DE

Free format text: ASSIGNS THE ENTIRE INTEREST, EFFECTIVE MARCH 13, 1987;ASSIGNOR:KENNECOTT MINING CORPORATION;REEL/FRAME:005128/0737

Effective date: 19870808