US3654586A - Indexing means for electrical connectors - Google Patents

Indexing means for electrical connectors Download PDF

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Publication number
US3654586A
US3654586A US21279A US3654586DA US3654586A US 3654586 A US3654586 A US 3654586A US 21279 A US21279 A US 21279A US 3654586D A US3654586D A US 3654586DA US 3654586 A US3654586 A US 3654586A
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United States
Prior art keywords
indexing
centerline
connector
indexing member
housing
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
US21279A
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English (en)
Inventor
Edward D Winkler
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Anderson Power Products Inc
Sanwa Business Credit Corp
Original Assignee
Anderson Power Products Inc
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Publication date
Application filed by Anderson Power Products Inc filed Critical Anderson Power Products Inc
Application granted granted Critical
Publication of US3654586A publication Critical patent/US3654586A/en
Assigned to MARINE MIDLAND BANK, N.A. reassignment MARINE MIDLAND BANK, N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIGH VOLTAGE ENGINEERING CORPORATION
Anticipated expiration legal-status Critical
Assigned to FIRST NATIONAL BANK OF BOSTON reassignment FIRST NATIONAL BANK OF BOSTON SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COMFAB TECHNOLOGIES, INC., HIGH VOLTAGE ENGINEERING CORPORATION
Assigned to FLEET NATIONAL BANK reassignment FLEET NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIGH VOLTAGE ENGINEERING CORPORATION, A MA CORPORATION
Assigned to SANWA BUSINESS CREDIT CORPORATION AS COLLATERAL AGENT reassignment SANWA BUSINESS CREDIT CORPORATION AS COLLATERAL AGENT COLLATERAL ASSIGNMENT OF COPYRIGHTS, PATENTS, TRADEMARKS AND LICENSES Assignors: DATCON INSTRUMENT COMPANY, HALMAR ROBICON GROUP, INC., HIGH VOLTAGE ENGINEERING CORPORATION, HIVEC HOLDINGS, INC.
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01R13/64—Means for preventing incorrect coupling

Definitions

  • An indexing or keying system for electrical connectors adapted for longitudinal telescopic engagement with each other provides each connector with an indexing member having a predetermined facing configuration disposed at the connecting end thereof on one side of the centerline and a complementary indexing opening on the other side of the centerline having a facing configuration substantially identical to the facing configuration of the indexing member.
  • the connectors may be indexed in accordance with any desired circuit parameter to prevent inadvertent joinder of dissimilar indexed connectors.
  • This invention generally relates to electrical connectors and is more particularly concerned with an indexing or keying system for same.
  • the present invention provides a novel indexing or keying means which may be employed with otherwise uniform sized connectors to positively prevent inadvertent joinder of connectors of differing circuit parameter ratings.
  • FIG. 1 is a perspective view of a pair of identical two pole connectors embodying the positive indexing means in accordance with the preferred embodiment of the invention
  • FIG. 2 is a connecting end elevation of one ofthe connector housings shown in FIG. 1;
  • FIG. 3 is an exploded side elevation of two connector housings, partially broken away along line 3-3 of FIG. 2, to show the interrelationship of the preferred indexing means of the two connector housings;
  • FIG. 4 is a fragmentary end view similar to FIG. 2 showing a modified indexing means configuration.
  • a pair of identical two pole electrical cable connectors indicated generally at and 12 comprise exact counterparts adapted for longitudinal telescopic engagement of their connecting ends indicated at 14 and 14', respectively, to form an electrical connection between cable terminals 16 secured to cables l8, 18 carried therein.
  • the connectors 10 and 12 are generally of the type disclosed in my US. Pat. Nos. 3,091,736 and 2,838,739, and will be herein described only with the particularity necessary to understand the present invention.
  • the connecting end 14 of the connector housing 10 is formed to define a lower pocket portion including two close-ended cable terminal receiving pockets 20 and 22 and an upper socket portion including open ended, inverted U-shaped sockets 24 and 26 adapted to snugly receive by insertion the pockets 20 and 22 of the identical inverted connector 12 on the upper half thereof.
  • the socket and pocket portions are disposed on either side of a transverse centerline designated as A central partition wall 28 extends from the periphery of the housing 10 to define and separate the sockets 24 and 26, and a complementary slot 30 is formed between the pockets 20 and 22 so as to slideably receive the central wall 28' of the second connector 12 when the two are longitudinally engaged.
  • the inner end of the slot 30 is defined by the outer wall 32 of a solid indexing member or bridge 34 disposed between the two pockets 20 and 22 and the inner wall 36 of which is coextensive with centerline of the housing 10. It should thus become apparent from viewing FIG. 3 that the housing 10 will longitudinally engage with the housing 12 only if indexing openings 38, 38' between inner ends 40, 40 of the partition walls and the inner walls 36, 36 of the indexing members 34, 34 have the same dimensions designated at A," A which are substantially identical to the thickness facing dimensions perpendicular to the centerline designated as B, B' of the indexing members 34, 34 so that the openings 38, 38' will slideably receive the sides of the other indexing members 34', 34 parallel to the centerline when the two connectors are longitudinally engaged.
  • indexing means 34, 38 which allow mating, it should be understood that the dimensions A" and B" can be complementarily varied for connectors having substantially the same overall size but which are adapted for use with cables of different voltage ratings. For example, if at any particular point it is necessary to connect cables carrying 24 volts and it is also necessary to connect cables in a 48 volt circuit, it is highly desirable to provide a positive means for insuring that 24 volt cables are not connected to 48 volt circuits and vice versa. This result will obtain if the connector housings l0 and 12 are indexed or keyed by providing complementary indexing means 34 and 38 having predetermined unique dimensions A" and B of different magnitude for each voltage rating desired.
  • the dimensions A and B for all connector housings 10 designed for use with 24 volt circuits should have the same predetermined unique value, while housings 10 to be used for different voltage circuits, say 48 volts, should have a different predetermined unique magnitude for their dimensions A and 8" for each voltage or other parameter rating desired to provide a "go, no-go positive indexing arrangement for electrical connectors. It is also preferred to vary the colors of the various housings 10 so that two connectors having the same indexing dimensions A" and B may be easily identified upon visual inspection.
  • the positive indexing feature of the preferred embodiment may be best appreciated with reference to FIG. 3. If the dimensions A and B of the connector housing 12 did not match dimensions A and B of housing 10, longitudinal engagement of the housings along the construction lines would be prevented because the faces of the partition walls 28, 28 and of the indexing members 34, 34 would be opposed to block engagement.
  • the rectangular configuration of the indexing bridge 34 is preferred because of its simple form and because it is centrally disposed with a portion of its facing periphery touching the centerline Q. 7
  • the latter feature aids longitudinal engagement of similarly indexed connectors by providing a centrally disposed guide to promote facile joinder with a minimum of flexing between the connectors.
  • FIG. 2 Two examples of other physical parameters which may be complementarily varied to index the connector housings are shown in FIG. 2 and a further centrally disposed indexing configuration is shown in FIG. 4.
  • the height of the partition wall 28 is designated C and the depth of its complementary slot 30 is designated D."
  • the connectors 10 and 12 could be keyed or indexed by assigning predetermined unique values to the dimensions C" and D for each indexing increment desired so that the inner end 40 of the partition wall 28 is positioned at substantially the same distance from the centerline [[as the inner end 32 of the slot 30 is on the other side of the centerline.
  • the partition wall 28 defines an indexing member housing a predetermined facing configuration and the slot 30 defines a complementary indexing opening on the other side of the centerline. If this indexing system is used, it is of course not necessary to have the inner wall bridge 30 coextensive with the centerline.
  • an indexing system may also be provided by complementarily varying the width 13" of partition wall 28 and the width of F of the slot 30 so that the housing 10 may be engaged only with another inverted housing having substantially identical keyed width dimensions for its wall 28 and slot 30.
  • this indexing system is employed, the provision of a member 34 closing the inner end of the slot 30 is not necessary.
  • FIG. 4 A modified configuration for the indexing bridge 34 and opening 38 is shown in FIG. 4 wherein the outer wall 32 of the indexing member 34 has an indented semicircular configuration while the inner end 40 of the partition wall 28 has complementary crowned semicircular configuration. Indexing may be accomplished with this configuration by assigning unique complementary values to the dimensions of the facing configurations of the indexing opening 38 (defined by the crowned inner wall 42 and the inner bridge wall 36) and the indexing member 34 for each indexing increment desired.
  • a keyed plural-poled connector having a housing of the type provided at the connecting end thereof with a pocket portion disposed on one side of a transverse centerline and including at least two terminal receiving pockets and a socket portion disposed on the other side of the transverse centerline and including at least two sockets open to said transverse centerline and adapted to receive by insertion the terminal receiving pockets of an inverted second connector in longitudinal telescopic engagement with the pocket portions of said connectors being in aligned, opposed relation so that terminals positioned therein will be in electrical contact with each other, said housing further having a positive indexing means comprising a longitudinally disposed indexing member positioned between said pocket portions at said connecting end and having a predetermined unique facing configuration, and means at said connecting end defining a complementary indexing opening of substantially the same facing configuration as said indexing member in said socket portion to slideably receive by longitudinal insertion an indexing member of said predetermined unique configuration, whereby said connector may be longitudinally engaged only with an inverted second connector having a substantially identical indexing member and indexing
  • said means defining a complementary indexing opening comprises a longitudinally extending central partition wall positioned between said socket portions and away from said centerline with the perpendicular distance from said centerline to said partition wall constituting the indexing opening.
  • indexing means has a rectangular facing configuration with one side of said indexing member being co-extensive with said centerline, said indexing member further having a predetermined thickness dimension perpendicular to the centerline substantially equal to the perpendicular distance between said centerline and said central partition wall.
  • a keyed plural-poled connector having a housing of the type provided at the connecting end thereof with a pocket portion disposed on one side of a transverse centerline and including at least two terminal receiving pockets and a socket portion disposed on the other side of the transverse centerline and including at least two sockets open to said transverse centerline and adapted to receive by insertion the terminal receiving pockets of an inverted second connector in longitudinal telescopic engagement, with the pocket portions of said connectors being in aligned, opposed relation so that terminals positioned therein will be in electrical contact with each other, said housing further having a positive indexing means comprising a longitudinally disposed indexing member positioned between said socket portions and away from said centerline at said connecting end with said indexing member having a predetermined uni ue facing configuration, and bridgin means between said pocket portions at said connecting end defining a complementary indexing opening of substantially the same facing configuration as the indexing member in said socket portion to slideably receive by longitudinal insertion an indexing member of said predetermined unique configuration, whereby said connector may

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  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
US21279A 1970-03-20 1970-03-20 Indexing means for electrical connectors Expired - Lifetime US3654586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2127970A 1970-03-20 1970-03-20

Publications (1)

Publication Number Publication Date
US3654586A true US3654586A (en) 1972-04-04

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Application Number Title Priority Date Filing Date
US21279A Expired - Lifetime US3654586A (en) 1970-03-20 1970-03-20 Indexing means for electrical connectors

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Country Link
US (1) US3654586A (de)
CA (1) CA923589A (de)
FR (1) FR2084951A5 (de)
GB (1) GB1295598A (de)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD242720S (en) * 1975-06-04 1976-12-14 Consolidated Foods Corporation Combined electric plug and receptacle therefor
US4403821A (en) * 1979-03-05 1983-09-13 Amp Incorporated Wiring line tap
US4592611A (en) * 1984-09-27 1986-06-03 Amp Incorporated Electrical connector intended for use in confined areas
EP0209691A1 (de) * 1985-06-25 1987-01-28 Fauzi Bekhiet Verbindungsvorrichtung für die elektrische Verbindung von elektrischen Anschlüssen von Elektrogeräten
US4981438A (en) * 1986-09-30 1991-01-01 Fauzi Bekhiet Universal interconnection system having interchangeable circuit boards
US5106320A (en) * 1991-04-09 1992-04-21 Kinnear Joseph D Power cable connector
EP0703127A3 (de) * 1994-09-22 1997-08-27 Honda Motor Co Ltd Fahrzeugdiebstahlsicherung
US6217191B1 (en) * 1998-05-29 2001-04-17 Jeng-Shyong Wu Multiple lamp socket device
US6234816B1 (en) 1999-03-30 2001-05-22 Agilant Technologies, Inc. Medical connector apparatus
US6244882B1 (en) 1995-11-21 2001-06-12 Agilent Technologies, Inc. Medical connector apparatus
US20040115980A1 (en) * 2002-12-17 2004-06-17 Douty George H. Finger proof power connector
WO2004051681A2 (en) * 2002-11-27 2004-06-17 Anderson Power Products Finger proof, keyed power connector and methods thereof
US20050020133A1 (en) * 2003-06-25 2005-01-27 Frank Homann Plug connection for a mobile terminal
US20050208840A1 (en) * 2003-12-17 2005-09-22 Mancini Danna A Wire to board connector and methods thereof
US20060178029A1 (en) * 2005-02-04 2006-08-10 Tyco Electronics Corporation Electrical connector assembly having at least two keying arrangements
WO2008016521A2 (en) * 2006-07-31 2008-02-07 Tyco Electronics Corporation Electrical connector assembly having at least two keying arrangements
CN100454665C (zh) * 2000-03-06 2009-01-21 索尼株式会社 连接电缆部件
USD665748S1 (en) * 2010-10-28 2012-08-21 Anderson Power Products Finger proof, keyed power connector
US20120329336A1 (en) * 2011-06-22 2012-12-27 Hon Hai Precision Industry Co., Ltd. Connector assembly
US20130052850A1 (en) * 2011-08-31 2013-02-28 Yazaki North America, Inc. Connector
CN102130385B (zh) * 2010-01-20 2013-03-13 富士康(昆山)电脑接插件有限公司 线缆连接器组件及其制造方法和导电端子
US20150325966A1 (en) * 2014-05-08 2015-11-12 Hong Ru Connectors Co., Ltd. Lamp connector
USD745459S1 (en) * 2013-06-17 2015-12-15 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
US20180108891A1 (en) * 2016-10-14 2018-04-19 Inevit, Inc. Battery module compartment and battery module arrangement of an energy storage system
US20190044273A1 (en) * 2016-04-27 2019-02-07 Hok Man Lam Spliced Electrical Connector
USD860136S1 (en) * 2017-12-13 2019-09-17 Ideal Industries, Inc. Electrical connector
USD876361S1 (en) * 2019-09-26 2020-02-25 Qingdao Baobin Electronics Technology Co., Ltd. Wire connector
USD913236S1 (en) * 2019-05-09 2021-03-16 Ideal Industries, Inc. Electrical connector
USD913939S1 (en) * 2019-05-09 2021-03-23 Ideal Industries, Inc. Electrical connector
USD984382S1 (en) 2019-05-09 2023-04-25 Ideal Industries, Inc. Electrical connector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4050481B2 (ja) * 2001-04-17 2008-02-20 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 超音波撮影装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824290A (en) * 1954-09-23 1958-02-18 Pyle National Co Multi-contact duplicate engaging connector
US3091746A (en) * 1960-07-28 1963-05-28 Albert & J M Anderson Mfg Co Electrical connector
US3173734A (en) * 1962-06-18 1965-03-16 Amp Inc Electrical connector
US3467942A (en) * 1965-03-10 1969-09-16 Amp Inc Housing member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824290A (en) * 1954-09-23 1958-02-18 Pyle National Co Multi-contact duplicate engaging connector
US3091746A (en) * 1960-07-28 1963-05-28 Albert & J M Anderson Mfg Co Electrical connector
US3173734A (en) * 1962-06-18 1965-03-16 Amp Inc Electrical connector
US3467942A (en) * 1965-03-10 1969-09-16 Amp Inc Housing member

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD242720S (en) * 1975-06-04 1976-12-14 Consolidated Foods Corporation Combined electric plug and receptacle therefor
US4403821A (en) * 1979-03-05 1983-09-13 Amp Incorporated Wiring line tap
US4592611A (en) * 1984-09-27 1986-06-03 Amp Incorporated Electrical connector intended for use in confined areas
EP0209691A1 (de) * 1985-06-25 1987-01-28 Fauzi Bekhiet Verbindungsvorrichtung für die elektrische Verbindung von elektrischen Anschlüssen von Elektrogeräten
US4981438A (en) * 1986-09-30 1991-01-01 Fauzi Bekhiet Universal interconnection system having interchangeable circuit boards
US5106320A (en) * 1991-04-09 1992-04-21 Kinnear Joseph D Power cable connector
EP0703127A3 (de) * 1994-09-22 1997-08-27 Honda Motor Co Ltd Fahrzeugdiebstahlsicherung
US6244882B1 (en) 1995-11-21 2001-06-12 Agilent Technologies, Inc. Medical connector apparatus
US6319031B1 (en) 1995-11-21 2001-11-20 Agilent Technologies, Inc. Medical connector apparatus
US6217191B1 (en) * 1998-05-29 2001-04-17 Jeng-Shyong Wu Multiple lamp socket device
US6234816B1 (en) 1999-03-30 2001-05-22 Agilant Technologies, Inc. Medical connector apparatus
CN100454665C (zh) * 2000-03-06 2009-01-21 索尼株式会社 连接电缆部件
WO2004051681A2 (en) * 2002-11-27 2004-06-17 Anderson Power Products Finger proof, keyed power connector and methods thereof
WO2004051681A3 (en) * 2002-11-27 2005-01-06 Anderson Power Products Finger proof, keyed power connector and methods thereof
US6994595B2 (en) * 2002-11-27 2006-02-07 Anderson Power Products Finger proof, keyed power connector and methods thereof
US20040171309A1 (en) * 2002-11-27 2004-09-02 Craig Baker Finger proof, keyed power connector and methods thereof
CN1717848B (zh) * 2002-11-27 2010-08-11 安德森电工产品公司 防手指接触的键式电源连接器及其方法
US20040115980A1 (en) * 2002-12-17 2004-06-17 Douty George H. Finger proof power connector
US6790067B2 (en) * 2002-12-17 2004-09-14 Tyco Electronics Corporation Finger proof power connector
US20050020133A1 (en) * 2003-06-25 2005-01-27 Frank Homann Plug connection for a mobile terminal
US7121899B2 (en) * 2003-06-25 2006-10-17 Friwo Geratebau Gmbh Plug connection for a mobile terminal
US20050208840A1 (en) * 2003-12-17 2005-09-22 Mancini Danna A Wire to board connector and methods thereof
US20060178029A1 (en) * 2005-02-04 2006-08-10 Tyco Electronics Corporation Electrical connector assembly having at least two keying arrangements
US7108534B2 (en) * 2005-02-04 2006-09-19 Tyco Electronics Corporation Electrical connector assembly having at least two keying arrangements
WO2008016521A3 (en) * 2006-07-31 2008-04-10 Tyco Electronics Corp Electrical connector assembly having at least two keying arrangements
WO2008016521A2 (en) * 2006-07-31 2008-02-07 Tyco Electronics Corporation Electrical connector assembly having at least two keying arrangements
CN102130385B (zh) * 2010-01-20 2013-03-13 富士康(昆山)电脑接插件有限公司 线缆连接器组件及其制造方法和导电端子
USD665748S1 (en) * 2010-10-28 2012-08-21 Anderson Power Products Finger proof, keyed power connector
US8602828B2 (en) * 2011-06-22 2013-12-10 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Connector assembly
US20120329336A1 (en) * 2011-06-22 2012-12-27 Hon Hai Precision Industry Co., Ltd. Connector assembly
US8454378B2 (en) * 2011-08-31 2013-06-04 Yazaki North America, Inc. Connector
US20130052850A1 (en) * 2011-08-31 2013-02-28 Yazaki North America, Inc. Connector
USD753599S1 (en) * 2013-06-17 2016-04-12 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
USD755721S1 (en) * 2013-06-17 2016-05-10 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
USD745459S1 (en) * 2013-06-17 2015-12-15 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
USD753598S1 (en) * 2013-06-17 2016-04-12 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
USD753597S1 (en) * 2013-06-17 2016-04-12 Wago Verwaltungsgesellschaft Mbh Electrical plug-in connector
USD753596S1 (en) * 2013-06-17 2016-04-12 WAGO Verwaltungsgesellscahft mbH Electrical plug-in connector
US9306348B2 (en) * 2014-05-08 2016-04-05 Hong Ru Connectors Co., Ltd. Lamp connector
US20150325966A1 (en) * 2014-05-08 2015-11-12 Hong Ru Connectors Co., Ltd. Lamp connector
US20190044273A1 (en) * 2016-04-27 2019-02-07 Hok Man Lam Spliced Electrical Connector
US10424865B2 (en) * 2016-04-27 2019-09-24 Hok Man Lam Spliced electrical connector
US20180108891A1 (en) * 2016-10-14 2018-04-19 Inevit, Inc. Battery module compartment and battery module arrangement of an energy storage system
US20180105062A1 (en) * 2016-10-14 2018-04-19 Inevit, Inc. Battery module compartment chamber and battery module mounting area of an energy storage system and method thereof
USD860136S1 (en) * 2017-12-13 2019-09-17 Ideal Industries, Inc. Electrical connector
USD913236S1 (en) * 2019-05-09 2021-03-16 Ideal Industries, Inc. Electrical connector
USD913939S1 (en) * 2019-05-09 2021-03-23 Ideal Industries, Inc. Electrical connector
USD984382S1 (en) 2019-05-09 2023-04-25 Ideal Industries, Inc. Electrical connector
USD876361S1 (en) * 2019-09-26 2020-02-25 Qingdao Baobin Electronics Technology Co., Ltd. Wire connector

Also Published As

Publication number Publication date
GB1295598A (de) 1972-11-08
CA923589A (en) 1973-03-27
FR2084951A5 (de) 1971-12-17

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AS Assignment

Owner name: MARINE MIDLAND BANK, N.A.

Free format text: SECURITY INTEREST;ASSIGNOR:HIGH VOLTAGE ENGINEERING CORPORATION;REEL/FRAME:005009/0952

Effective date: 19880801

AS Assignment

Owner name: FIRST NATIONAL BANK OF BOSTON

Free format text: SECURITY INTEREST;ASSIGNORS:COMFAB TECHNOLOGIES, INC.;HIGH VOLTAGE ENGINEERING CORPORATION;REEL/FRAME:005258/0013;SIGNING DATES FROM

AS Assignment

Owner name: FLEET NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:HIGH VOLTAGE ENGINEERING CORPORATION, A MA CORPORATION;REEL/FRAME:005748/0283

Effective date: 19910607

AS Assignment

Owner name: SANWA BUSINESS CREDIT CORPORATION AS COLLATERAL AG

Free format text: COLLATERAL ASSIGNMENT OF COPYRIGHTS, PATENTS, TRADEMARKS AND LICENSES;ASSIGNORS:HIGH VOLTAGE ENGINEERING CORPORATION;DATCON INSTRUMENT COMPANY;HALMAR ROBICON GROUP, INC.;AND OTHERS;REEL/FRAME:008013/0660

Effective date: 19960509