US3792418A - Electrical connector - Google Patents

Electrical connector Download PDF

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Publication number
US3792418A
US3792418A US00177730A US3792418DA US3792418A US 3792418 A US3792418 A US 3792418A US 00177730 A US00177730 A US 00177730A US 3792418D A US3792418D A US 3792418DA US 3792418 A US3792418 A US 3792418A
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US
United States
Prior art keywords
sleeve
section
mating
electrical connector
fluorocarbon
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
US00177730A
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English (en)
Inventor
W Kailus
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.)
Amphenol Corp
Bunker Ramo Corp
Original Assignee
Bunker Ramo Corp
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 Bunker Ramo Corp filed Critical Bunker Ramo Corp
Application granted granted Critical
Publication of US3792418A publication Critical patent/US3792418A/en
Assigned to ALLIED CORPORATION A CORP. OF NY reassignment ALLIED CORPORATION A CORP. OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BUNKER RAMO CORPORATION A CORP. OF DE
Assigned to CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENCY, AS AGENT reassignment CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENCY, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMPHENOL CORPORATION
Assigned to AMPHENOL CORPORATION, A CORP. OF DE reassignment AMPHENOL CORPORATION, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ALLIED CORPORATION, A CORP. OF NY
Anticipated expiration legal-status Critical
Assigned to AMPHENOL CORPORATION A CORP. OF DELAWARE reassignment AMPHENOL CORPORATION A CORP. OF DELAWARE RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CANADIAN IMPERIAL BANK OF COMMERCE
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/02—Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/933—Special insulation

Definitions

  • ABSTRACT A high-temperature electrical connector including interengageable mating sections each having a central and an outer-tubular metallic contact and an insulating sleeve disposed therebetvveen with the insulating sleeve of the one section having self-lubricating surfaces of a fluorocarbon engaging the sleeve or its associated outer-tubular metallic contact of the other section, the fluorocarbon having a relatively low heat deflection temperature so as to deform at high temperatures.
  • the other insulating sleeve is composed of a material such as an aromatic polysulfone with a relatively high heat deflection temperature to provide a relatively rigid support for the fluorocarbon sleeve.
  • interengageable connector sections are mated to provide electrical connection between centrally-mounted mating contacts and to interconnect protective housings surrounding these contacts.
  • the housings are composed of insulating materials with at least one housing being shaped as a sleeve to receive the other in engaging relationship.
  • the housings are metallic to provide electrical shielding of the central contacts and insulating members are provided to isolate the central and outer contacts.
  • one of the insulating members longitudinally extends as a sleeve between the central and outer contacts and abuts against the other insulating member rearwardly located in the connector section.
  • This invention relates to electrical connectors with interengageable mating sections in which an insulating sleeve on one of the sections is mated within a complimentary protective housing on the other section.
  • the sleeve is composed of a self-lubricating fluorocarbon with a relatively low heat deflection temperature and thereby heat distortable in a mating relationship with the complimentary protective housing.
  • the invention is directed to an electrical connector with interengageable mating sections in which the complimentary protective housing engageable with the fluorocarbon sleeve is composed of a material having a relatively high heat deflection temperature-to maintain the mating relationship while permitting the sections to be released at high temperatures.
  • Exemplary of a material with such high heat deflection temperatures is an aromatic polysulfonc which is insulatively stable at temperatures of 400-500 F. and also has a heat deflection temperature of over 500 F. at 264 psi as measured .in ASTM D 648-56.
  • the electrical connector of the invention Several advantages result from the electrical connector of the invention.
  • One is the utilization of a high temperature, self-lubricating fluorocarbon as an elongated insulating sleeve in the connector construction.
  • the fluorocarbon provides self-lubricating properties and thereby can be easily inserted within or over a complimentary protective housing without requiring the second housing to be similarly self-lubricating. It is also sufficiently yieldable .to form an interference fit with the complimentary housing.
  • Another advantage is provided by the combination of the fluorocarbon sleeve with a complimentary protective housing composed of a material comparatively rigid at the higher temperatures.
  • the rigid housing provides a mating surface which resists distortion and permits release of the connector sections.
  • Another advantage is provided by the use of a complimentary protective housing mateable in an engaging relationship with the fluorocarbon sleeve and composed of a material having a high heat deflection temperature to maintain the engaging relationship without preventing the connector sections from being released.
  • a further advantage is provided at the high temperatures when the fluorocarbon sleeve includes a raised collar which tightly bears against the mating surface of the rigid complimentary housing. Although the raised collar is under stress and distorted by the heat, it tends. to conform to the mating surface of the rigid material and maintains some sealing effect.
  • FIG. 1 is a side view in cross section of the electrical connector of the invention.
  • FIG. 2 is a side view in cross section of a second embodiment of the connector of the invention.
  • FIG. 3 is a side view of a third embodiment of the connector of the invention.
  • FIG. 4 is a side view partially in cross section of one of the mating sections of the connector of FIG. 1.
  • FIG. 5 is a side view partially in cross section of the second mating section of the connector of FIG. 1.
  • FIG. 6 is a side view in cross section of a socket contact of FIG. 2.
  • the electrical connector of the invention is designed for high temperature use and comprises first and second interengageable mating sections, each with a protective body containing one or a plurality of contactreceiving bores and contacts mounted therein.
  • the body includes one or a plurality of yieldable sleeves extending around the contacts in the bores with self-lubricating surfaces adapted to easily slide against surfaces in the other mating section while being insulatively stable at temperatures in the order of 400-500 F.
  • the protective body of the second mating section includes a similar number of bores and complimentary contacts mounted therein to mate with those contacts in the first section.
  • the second protective body provides one or a plurality of insulating surfaces insulatively stable at the higher temperatures and relatively rigid to accept the self-lubricating surfaces of the sleeves and form insulated enclosures around the mated contacts.
  • the self-lubricating surfaces are composed of a fluorocarbon such as polytetrafluoroethylene and provide self-lubrication at temperatures of 400500 F. Since the fluorocarbons with these characteristics tend to be heat distortable as illustrated by low heat deflection temperatures (e.g. below about 300 F. at 66 psi as measured in ASTM D 648-56), the adverse effects of heat distortion on the mating surfaces of the connector are reduced by including as the complimentary mating surface, a material which is relatively rigid at the higher temperatures.
  • the fluorocarbon surface when the mating is accompanied by bearing stress on the adjacent surfaces, includes a raised portion as a bearing surface which can be heat distorted while maintaining engagement with the adjacent surface which can be formed to permit easy release of the mating sections.
  • Connectors according to the present invention are applicable to a wide variety of constructions but in a typical installation will comprise one or a plurality of pairs of interengageable mating sections and 12 with mating contacts 14 and 16 made of leaded copper and centrally mounted in their respective sections.
  • first section 10 includes central contact 14 with forward pin 18, rear socket 20, and intermediate cylindrical portion 21 for mounting the contact in section 10.
  • Second section 12 includes central contact 16 with forward socket 22, rear pin 23 swagged in a bussing ring 24, and intermediate irregular surfaces 25 for mounting in section 12.
  • Bussing ring 24 is part of a bussing assembly described in my copending application entitled CONNECTOR MOD- ULE" and filed Sept. 7, l971 as Ser. No. l78,097.
  • sleeve 26 Disposed around and laterally spaced apart from contact 14 are protective sleeve 26 of plastic such as the described fluorocarbon and sleeve 27 of berryllium copper which serve respectively for insulating and electrical shielding purposes.
  • Sleeve 26 is disposed between contact 14 and outer-tubular contact of sleeve 27 and includes mating end 28 which engages section 12 when sections 10 and 12 are mated.
  • sleeve 26 includes an outer peripheral surface 29 with laterally projecting riser 30 which extends around surface 29 in a direction normal to the longitudinal axis 31 of sleeve 26 and is designed to telescopingly engage with surface 34 of section 12.
  • Mating end 28 except for riser 30 is sized so as to be spaced apart from sleeve 27 to permit release of the sleeves.
  • sleeve 26 extends longitudinally beyond contact 14 and is laterally spaced apart from the contact.
  • Section 12 also includes protective sleeves 32 and 33 which provide insulative and electrical protection for central contact 16 in a similar manner to sleeves 26 and 27 in respect to contact 14.
  • the combination of sleeves 32 and 33 provides at least one surface illustrated in FIG. 1 as surface 34 on sleeve 33 for snug engatement and more advantageously an interference fit with riser 30 of sleeve 26.
  • Sleeve 33 includes mating end 35 from which surface 34 extends rearwardly as a smooth annular shape with a minimum cross section at mating end 35 in order that the heat deflection and distortion in sleeve 26 will not result in the interlocking of sleeves 26 and 33 together. Since riser 30 also serves for sealing purposes, it is preferred that surface 34 be circular with its diameter remaining essentially constant for length 36 over which riser 30 passes.
  • section 15 includes metallic, sleeve 37 with surface 38 for mating with riser 39 of sleeve 40 and no separate insulating sleeve is provided.
  • Metallic sleeve 37 also includes outer surface 41 for mating with metallic sleeve 42 to provide electrical connection between the two outer contacts.
  • Sleeve 42 includes mating end 43 shaped as a spring 44 which resiliently bears against metallic sleeve 41.
  • section 15 is formed with glass insulator 85 as part of a hermetic seal (not shown).
  • insulating sleeve 45 can provide surface 46 upon which riser 47 engages during the mating.
  • central contacts 48 and 49, insulating sleeves 45 and 50, and outer tubular contacts 51 and 52 respectively become mated.
  • sleeve 50 is sized so as to telescope over surface 46 of sleeve 45 with riser 47 engaging surface 46.
  • Central socket 79 for the mating section 13 of FIG. 2 is illustrated in FIG. 6 and includes forward and rear sockets 80 and 81 separated by cylindrical mounting portion 82.
  • Forward socket 80 includes pressure spring 83 to bias socket 80 inwardly.
  • a forwardly hooked hood 84 is fastened over socket 80 and limits the outward deflection of socket 80.
  • An electrical connector comprising first and second interengageable mating sections, each including at least one central metallic contact and outer protective longitudinally elongated sleeve therefor, the sleeve of the first section being composed of a self-lubricating fluorocarbon having a heat deflection temperature below about 300 F.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
US00177730A 1971-09-03 1971-09-03 Electrical connector Expired - Lifetime US3792418A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17773071A 1971-09-03 1971-09-03
US17809771A 1971-09-07 1971-09-07

Publications (1)

Publication Number Publication Date
US3792418A true US3792418A (en) 1974-02-12

Family

ID=26873586

Family Applications (2)

Application Number Title Priority Date Filing Date
US00177730A Expired - Lifetime US3792418A (en) 1971-09-03 1971-09-03 Electrical connector
US00178097A Expired - Lifetime US3757276A (en) 1971-09-03 1971-09-07 Connector module

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00178097A Expired - Lifetime US3757276A (en) 1971-09-03 1971-09-07 Connector module

Country Status (10)

Country Link
US (2) US3792418A (xx)
JP (1) JPS4836898A (xx)
BE (1) BE788260A (xx)
CA (2) CA979990A (xx)
CH (1) CH556098A (xx)
DD (1) DD102239A5 (xx)
DE (2) DE2241728A1 (xx)
FR (2) FR2151060A1 (xx)
GB (2) GB1395073A (xx)
IT (1) IT967086B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976352A (en) * 1974-05-02 1976-08-24 Georg Spinner Coaxial plug-type connection
US4208092A (en) * 1977-10-14 1980-06-17 Bunker Ramo Corporation Fiber optic multi-cable pair connector
US4619496A (en) * 1983-04-29 1986-10-28 Amp Incorporated Coaxial plug and jack connectors
US4628159A (en) * 1984-11-06 1986-12-09 Adc Telecommunications, Inc. Electrical connector apparatus
US4880396A (en) * 1988-06-16 1989-11-14 American Telephone And Telegraph Company, At&T Bell Laboratories Coaxial connector
WO1991011039A1 (en) * 1990-01-16 1991-07-25 Beta Phase, Inc. High density and multiple insertion connector
US5067912A (en) * 1987-11-03 1991-11-26 M/A-Com Adams-Russell, Inc. Subassembly for a microwave connector and method for making it
US5137469A (en) * 1985-05-31 1992-08-11 International Business Machines Corporation Hybrid connector for standard coaxial cable and other wiring systems
US20040053530A1 (en) * 2002-09-12 2004-03-18 Larry Buenz Coaxial cable connector and tool and method for connecting a coaxial cable
US20070087627A1 (en) * 2005-10-19 2007-04-19 Mathews Roger D Sealing security shield
US20110051777A1 (en) * 2009-09-02 2011-03-03 Schlipf Andreas High-temperature plug
US8926360B2 (en) 2013-01-17 2015-01-06 Cooper Technologies Company Active cooling of electrical connectors
US9093764B2 (en) 2013-01-17 2015-07-28 Cooper Technologies Company Electrical connectors with force increase features

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421332Y2 (xx) * 1974-09-11 1979-07-28
US3958851A (en) * 1974-12-30 1976-05-25 Ibm Corporation Shielded connector
JPS541253Y2 (xx) * 1975-10-28 1979-01-20
US4029386A (en) * 1976-02-23 1977-06-14 The Bendix Corporation Connector having a plated plastic ground for filter contacts
DE2923383C2 (de) * 1979-06-08 1984-04-19 Kathrein-Werke Kg, 8200 Rosenheim Koaxial-Steckverbindung
JPS57121542A (en) * 1981-01-21 1982-07-29 Fuji Xerox Co Ltd Paper conveyor
US4820196A (en) * 1987-10-01 1989-04-11 Unisys Corporation Sealing of contact openings for conformally coated connectors for printed circuit board assemblies
US5037332A (en) * 1990-08-07 1991-08-06 Itt Corporation Intermodule electrical coupling
US5224918A (en) * 1991-06-27 1993-07-06 Cray Research, Inc. Method of manufacturing metal connector blocks
US5178549A (en) * 1991-06-27 1993-01-12 Cray Research, Inc. Shielded connector block
US5211567A (en) * 1991-07-02 1993-05-18 Cray Research, Inc. Metallized connector block
DE10313833A1 (de) * 2003-03-21 2004-10-07 Tyco Electronics Pretema Gmbh Baueinheit und Verfahren zur Herstellung derselben
JP2006006529A (ja) * 2004-06-24 2006-01-12 Olympus Corp 内視鏡
GB0608832D0 (en) 2006-05-04 2006-06-14 Airbus Uk Ltd Aircraft wiring installation
DE202009011857U1 (de) * 2009-09-02 2009-11-19 Türk & Hillinger GmbH Hochtemperatur-Steckverbinder für Anschlussleitungen
WO2019027793A1 (en) * 2017-07-31 2019-02-07 Corning Optical Communications Rf Llc DIVIDER WITH EXIT PORTS
CN108565653B (zh) * 2018-04-04 2023-12-15 江苏昕讯光电科技有限公司 耐高压的射频同轴连接器用插针
BE1026802B1 (de) * 2018-11-26 2020-06-25 Phoenix Contact Gmbh & Co Steckverbinder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR57453E (fr) * 1947-07-16 1953-01-28 Prise de courant électrique
US2860316A (en) * 1954-04-26 1958-11-11 Gen Electric High voltage pin socket connector
FR1168745A (fr) * 1957-03-01 1958-12-15 Souriau & Cie Perfectionnements apportés aux systèmes connecteurs ou prises de courant
US3196382A (en) * 1962-08-07 1965-07-20 Itt Crimp type coaxial cable connector
DE1929846A1 (de) * 1969-06-12 1970-12-23 Siemens Ag Koaxialsteckverbindung
US3665371A (en) * 1969-05-19 1972-05-23 Bunker Ramo Electrical connectors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR57453E (fr) * 1947-07-16 1953-01-28 Prise de courant électrique
US2860316A (en) * 1954-04-26 1958-11-11 Gen Electric High voltage pin socket connector
FR1168745A (fr) * 1957-03-01 1958-12-15 Souriau & Cie Perfectionnements apportés aux systèmes connecteurs ou prises de courant
US3196382A (en) * 1962-08-07 1965-07-20 Itt Crimp type coaxial cable connector
US3665371A (en) * 1969-05-19 1972-05-23 Bunker Ramo Electrical connectors
DE1929846A1 (de) * 1969-06-12 1970-12-23 Siemens Ag Koaxialsteckverbindung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
The Condensed Chemical Dictionary, 8th Ed., July 6, 1971, pages 712 & 713. *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976352A (en) * 1974-05-02 1976-08-24 Georg Spinner Coaxial plug-type connection
US4208092A (en) * 1977-10-14 1980-06-17 Bunker Ramo Corporation Fiber optic multi-cable pair connector
US4619496A (en) * 1983-04-29 1986-10-28 Amp Incorporated Coaxial plug and jack connectors
US4628159A (en) * 1984-11-06 1986-12-09 Adc Telecommunications, Inc. Electrical connector apparatus
US5137469A (en) * 1985-05-31 1992-08-11 International Business Machines Corporation Hybrid connector for standard coaxial cable and other wiring systems
US5067912A (en) * 1987-11-03 1991-11-26 M/A-Com Adams-Russell, Inc. Subassembly for a microwave connector and method for making it
US4880396A (en) * 1988-06-16 1989-11-14 American Telephone And Telegraph Company, At&T Bell Laboratories Coaxial connector
US5044980A (en) * 1990-01-16 1991-09-03 Beta Phase, Inc. High density and multiple insertion connector
WO1991011039A1 (en) * 1990-01-16 1991-07-25 Beta Phase, Inc. High density and multiple insertion connector
US20040053530A1 (en) * 2002-09-12 2004-03-18 Larry Buenz Coaxial cable connector and tool and method for connecting a coaxial cable
US7134189B2 (en) 2002-09-12 2006-11-14 Andrew Corporation Coaxial cable connector and tool and method for connecting a coaxial cable
US20070087627A1 (en) * 2005-10-19 2007-04-19 Mathews Roger D Sealing security shield
US7214095B1 (en) 2005-10-19 2007-05-08 John Mezzalingua Associates, Inc. Sealing security shield
US20110051777A1 (en) * 2009-09-02 2011-03-03 Schlipf Andreas High-temperature plug
US8651738B2 (en) 2009-09-02 2014-02-18 Türk & Hillinger GmbH High-temperature plug
US8926360B2 (en) 2013-01-17 2015-01-06 Cooper Technologies Company Active cooling of electrical connectors
US9093764B2 (en) 2013-01-17 2015-07-28 Cooper Technologies Company Electrical connectors with force increase features
US9553389B2 (en) 2013-01-17 2017-01-24 Cooper Technologies Company Active cooling of electrical connectors

Also Published As

Publication number Publication date
FR2152606A1 (xx) 1973-04-27
JPS4836898A (xx) 1973-05-31
DD102239A5 (xx) 1973-12-05
DE2241728A1 (de) 1973-03-08
GB1400204A (en) 1975-07-16
CH556098A (de) 1974-11-15
IT967086B (it) 1974-02-28
GB1395073A (en) 1975-05-21
CA979990A (en) 1975-12-16
DE2242677A1 (de) 1973-03-15
BE788260A (fr) 1972-12-18
FR2151060A1 (xx) 1973-04-13
CA975449A (en) 1975-09-30
US3757276A (en) 1973-09-04

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Legal Events

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AS Assignment

Owner name: ALLIED CORPORATION COLUMBIA ROAD AND PARK AVENUE,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BUNKER RAMO CORPORATION A CORP. OF DE;REEL/FRAME:004149/0365

Effective date: 19820922

AS Assignment

Owner name: CANADIAN IMPERIAL BANK OF COMMERCE, NEW YORK AGENC

Free format text: SECURITY INTEREST;ASSIGNOR:AMPHENOL CORPORATION;REEL/FRAME:004879/0030

Effective date: 19870515

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Owner name: AMPHENOL CORPORATION, A CORP. OF DE, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850

Effective date: 19870602

Owner name: AMPHENOL CORPORATION, LISLE, ILLINOIS A CORP. OF D

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NY;REEL/FRAME:004844/0850

Effective date: 19870602

AS Assignment

Owner name: AMPHENOL CORPORATION A CORP. OF DELAWARE

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CANADIAN IMPERIAL BANK OF COMMERCE;REEL/FRAME:006147/0887

Effective date: 19911114