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US3324234A - Electrical connector strap - Google Patents

Electrical connector strap Download PDF

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Publication number
US3324234A
US3324234A US435559A US43555965A US3324234A US 3324234 A US3324234 A US 3324234A US 435559 A US435559 A US 435559A US 43555965 A US43555965 A US 43555965A US 3324234 A US3324234 A US 3324234A
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US
United States
Prior art keywords
band
connector
contact
pieces
segments
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Expired - Lifetime
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US435559A
Inventor
Harold C Hervig
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3M Co
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Minnesota Mining and Manufacturing Co
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Priority to US435559A priority Critical patent/US3324234A/en
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Publication of US3324234A publication Critical patent/US3324234A/en
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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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/643—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for rigid cylindrical bodies
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/14—Bale and package ties, hose clamps
    • Y10T24/1457—Metal bands
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18232—Crank and lever

Definitions

  • ELECTRICAL CONNECTOR STRAP Filed Feb. 26, 1965 I NVENTOR. $142010 6/15? v/cv' United States Patent 3,324,234 ELECTRICAL CONNECTOR STRAP Harold C. Hervig, Maplewood, N.J., assignor to Minnesota Mining and Manufacturing Company, St. Paul, Minn, a corporation of Delaware Filed Feb. 26, I965, Ser. No. 435,559 2 Claims. (Cl. 174-135)
  • This invention pertains to connectors for making electrical and mechanical connections.
  • the connector of the invention will make connection with cables, rods, hex bars, and other conductive structures having a generally circular cross-section.
  • One example of its general application is the connecting of ground straps to hexagonal bars.
  • the connector is especially useful in affixing protective stress cones around and in permanent electrical contact with the terminal areas of metal shielded components of insulated high voltage cables in the making of encapsulated splices or terminations.
  • the connector is self-contained, requiring no bolts, screws, or other separate or loose components and is of simple construction, being producible in quantity by simple stamping and bending operations. It will connect objects having a wide range of diameters and will make a flush, space saving connection.
  • the connector can be applied by hand without tools to produce a permanent electrical connection between the objects to be connected.
  • the connector of the invention consists of a metal band with contact legs spaced along the longitudinal edges. When applied the contact legs on each side of the connector exert a constant force against the objects to be connected. This force is developed by the use of laterally extending resilient segments at the ends of which are disposed the contact legs.
  • the connector is provided with a tab and slot arrangement so it can be quickly fastened around the objects to be connected.
  • FIGURE 1 is a plan view of the connector as supplied
  • FIGURE 2 is a side elevation of the connector of FIG- URE 1,
  • FIGURE 3 is a transverse sectional view of the connector of FIGURE 1,
  • FIGURE 4 is a view in perspective showing the connector in the process of being applied to a metal shielded cable and an overlapping stress cone, and
  • FIGURE 5 is a side elevation, partly in section, showing the connector as applied to overlapping cylindrical objects.
  • the connector consists of a flexible elongate spring metal plate or band, preferably of spring temper brass, provided at one end with an elongate tab 11.
  • the band is formed with narrow, rectangular transverse notches 12 regularly spaced along the longitudinal edges of the band, thereby providing laterally extending resilient segments 14. The end portions of the segments are disposed at right angles to the body of the band to form contact legs 15 and 16.
  • Transverse slots 13 are formed centrally along the length of the band and are adapted to accept the tab 11 to provide a closure when the band is placed around the pieces to be connected so that the tab may be inserted through a slot, pulled taut, and bent back over itself to provide a closure.
  • the connector is stamped from mil spring temper brass.
  • the length of the body of the band is about 5.50 inches.
  • the tab, rounded at the end, extends from one end of the body of 3,324,234 Patented June 6, 1967 the band about 1.12 inches.
  • the width of the ban-d Prior to the bending of the end portions of the segments to form contact legs, the width of the ban-d is .94 inch.
  • the rectangular notches, .032 inch wide, are spaced opposite each other at intervals of .250 inch from center to center along the longitudinal edges of the band with .125 inch of band remaining between opposing notches.
  • the Width of the resulting resilient segments is .218 inch.
  • the slots 13 are .032 inch wide and .250 inch long, spaced centrally .250 inch apart from center to center along the length of the band.
  • the contact legs are tapered and bent down at right angles to the segments as illustrated.
  • the shorter contact legs 15 are .070 inch and the longer contact legs 16 are .114 inch.
  • FIGURE 3 is a cross-sectional view of the band.
  • the contact legs 15 and 16 are formed at right angles to the arms 14.
  • the contact legs along one side of the band can be formed a length different than on the other side as illustrated by FIGURE 3 Where the contact legs 15 are shorter than contact legs 16.
  • Having the contact legs of different lengths produces a level connection between objects which overlap, as illustrated in FIG- URES 4 and 5, and less space in the splice area is taken up.
  • the contact legs are preferably tapered, as shown in FIGURE 2, to facilitate the bending of the band around the cylindrical object and to produce a higher unit area force to be applied to the objects being connected because of the smaller area at the ends of the contact legs.
  • FIGURE 4 shows the connector in the process of being applied to a metal shielded cable 17 and an overlapping stress cone 18.
  • the connector is first centered around the joint with the side of the connector having the shorter legs facing the overlapping cylinder; the tab is then inserted into an appropriate slot, pulled taut, and bent back against itself.
  • the tab and slot arrangement permits the connector to be fastened around the objects quickly and effective ly.
  • One size connector can be used with objects having a wide variety of diameters, any excess length being easily removed by cutting or folding.
  • the connector is desirably provided with an indicator, such as the notch formed in the end slot of the connector as illustrated by FIGURES 1 and 4, to visually designate which side of the connector has the shorter legs.
  • FIGURE 5 shows the connector as applied.
  • the center portion of the connector becomes depressed and the diameter of the connector at the center is then less than at the edges. Due to the resiliency of the spring metal arms the depressing of the connector center produces a force, which is applied by the end of each contact leg to the connected object. The small area at the ends of the contact legs and the high force developed by the resilient segments produces a good electrical connection. The spring tension in each arm, translated through the contact leg to the object to be connected, is simultaneously accomplished in the connector when the tab is pulled taut around the objects.
  • the spring metal connector of the invention provides a convenient mechanical and a permanent electrical connection, is easily manufactured, and can be quickly applied to objects of a variety of shapes.
  • An electrical connector useful in rapidly and effectively securing mechanical and permanent electrical connection between a cable shield and an overlapping stress cones comprising a spring metal band having an elongate tab (11) disposed at one end thereof and adapted to be bent back over itself, said band having a longitudinal central portion along both sides of which uniform rectangular laterally extending resilient segments (14) are regularly and oppositely spaced, each of said segments including a contact leg (15, 16) disposed at a right angle thereto and at the distal end thereof, said band being of sufficient stiffness, and said segments extending laterally a sufiicient distance, to permit constriction of the central portion of the band, when placed around the pieces to be connected and pulled taut by hand application into contact with the outer of said pieces, while still exerting a force through the contact legs sufiicient to make permanent electrically conductive spring contact to the pieces to be connected, said band being transversely slotted centrally along the length of the band to provide a series of tab receiving slots (13).

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

June 5, 1967 H RWG 3,324,234
ELECTRICAL CONNECTOR STRAP Filed Feb. 26, 1965 I NVENTOR. $142010 6/15? v/cv' United States Patent 3,324,234 ELECTRICAL CONNECTOR STRAP Harold C. Hervig, Maplewood, N.J., assignor to Minnesota Mining and Manufacturing Company, St. Paul, Minn, a corporation of Delaware Filed Feb. 26, I965, Ser. No. 435,559 2 Claims. (Cl. 174-135) This invention pertains to connectors for making electrical and mechanical connections. The connector of the invention will make connection with cables, rods, hex bars, and other conductive structures having a generally circular cross-section. One example of its general application is the connecting of ground straps to hexagonal bars. The connector is especially useful in affixing protective stress cones around and in permanent electrical contact with the terminal areas of metal shielded components of insulated high voltage cables in the making of encapsulated splices or terminations.
Electrical and mechanical connection can be made quickly and effectively by the use of the connector of the invention. The connector is self-contained, requiring no bolts, screws, or other separate or loose components and is of simple construction, being producible in quantity by simple stamping and bending operations. It will connect objects having a wide range of diameters and will make a flush, space saving connection. The connector can be applied by hand without tools to produce a permanent electrical connection between the objects to be connected.
Generally, the connector of the invention consists of a metal band with contact legs spaced along the longitudinal edges. When applied the contact legs on each side of the connector exert a constant force against the objects to be connected. This force is developed by the use of laterally extending resilient segments at the ends of which are disposed the contact legs. The connector is provided with a tab and slot arrangement so it can be quickly fastened around the objects to be connected.
A preferred form of the connector of the invention is illustrated in the drawing, in which FIGURE 1 is a plan view of the connector as supplied,
FIGURE 2 is a side elevation of the connector of FIG- URE 1,
FIGURE 3 is a transverse sectional view of the connector of FIGURE 1,
FIGURE 4 is a view in perspective showing the connector in the process of being applied to a metal shielded cable and an overlapping stress cone, and
FIGURE 5 is a side elevation, partly in section, showing the connector as applied to overlapping cylindrical objects.
As illustrated by FIGURES 1 and 2, the connector consists of a flexible elongate spring metal plate or band, preferably of spring temper brass, provided at one end with an elongate tab 11. The band is formed with narrow, rectangular transverse notches 12 regularly spaced along the longitudinal edges of the band, thereby providing laterally extending resilient segments 14. The end portions of the segments are disposed at right angles to the body of the band to form contact legs 15 and 16. Transverse slots 13 are formed centrally along the length of the band and are adapted to accept the tab 11 to provide a closure when the band is placed around the pieces to be connected so that the tab may be inserted through a slot, pulled taut, and bent back over itself to provide a closure.
The following are the approximate dimensions of one illustrative embodiment of the connector. The connector is stamped from mil spring temper brass. The length of the body of the band is about 5.50 inches. The tab, rounded at the end, extends from one end of the body of 3,324,234 Patented June 6, 1967 the band about 1.12 inches. Prior to the bending of the end portions of the segments to form contact legs, the width of the ban-d is .94 inch. The rectangular notches, .032 inch wide, are spaced opposite each other at intervals of .250 inch from center to center along the longitudinal edges of the band with .125 inch of band remaining between opposing notches. The Width of the resulting resilient segments is .218 inch. The slots 13 are .032 inch wide and .250 inch long, spaced centrally .250 inch apart from center to center along the length of the band. The contact legs are tapered and bent down at right angles to the segments as illustrated. The shorter contact legs 15 are .070 inch and the longer contact legs 16 are .114 inch. These dimensions are particularly effective in providing a connector for aflixing thin conductive closely fitting stress cones to shielded electrical cables having a shield diameter of approximately one-half to one and threefourths inches. Other dimensions may be preferred for other applications.
FIGURE 3 is a cross-sectional view of the band. As illustrated, the contact legs 15 and 16 are formed at right angles to the arms 14. The contact legs along one side of the band can be formed a length different than on the other side as illustrated by FIGURE 3 Where the contact legs 15 are shorter than contact legs 16. Having the contact legs of different lengths produces a level connection between objects which overlap, as illustrated in FIG- URES 4 and 5, and less space in the splice area is taken up. The contact legs are preferably tapered, as shown in FIGURE 2, to facilitate the bending of the band around the cylindrical object and to produce a higher unit area force to be applied to the objects being connected because of the smaller area at the ends of the contact legs.
FIGURE 4 shows the connector in the process of being applied to a metal shielded cable 17 and an overlapping stress cone 18. The connector is first centered around the joint with the side of the connector having the shorter legs facing the overlapping cylinder; the tab is then inserted into an appropriate slot, pulled taut, and bent back against itself. The tab and slot arrangement permits the connector to be fastened around the objects quickly and effective ly. One size connector can be used with objects having a wide variety of diameters, any excess length being easily removed by cutting or folding. The connector is desirably provided with an indicator, such as the notch formed in the end slot of the connector as illustrated by FIGURES 1 and 4, to visually designate which side of the connector has the shorter legs.
FIGURE 5 shows the connector as applied. When the tab is inserted into a slot and pulled taut, the center portion of the connector becomes depressed and the diameter of the connector at the center is then less than at the edges. Due to the resiliency of the spring metal arms the depressing of the connector center produces a force, which is applied by the end of each contact leg to the connected object. The small area at the ends of the contact legs and the high force developed by the resilient segments produces a good electrical connection. The spring tension in each arm, translated through the contact leg to the object to be connected, is simultaneously accomplished in the connector when the tab is pulled taut around the objects.
The spring metal connector of the invention provides a convenient mechanical and a permanent electrical connection, is easily manufactured, and can be quickly applied to objects of a variety of shapes.
Changes in the specific form of the invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of the invention.
I claim:
1. An electrical connector useful in rapidly and effectively securing mechanical and permanent electrical connection between a cable shield and an overlapping stress cones, the connector comprising a spring metal band having an elongate tab (11) disposed at one end thereof and adapted to be bent back over itself, said band having a longitudinal central portion along both sides of which uniform rectangular laterally extending resilient segments (14) are regularly and oppositely spaced, each of said segments including a contact leg (15, 16) disposed at a right angle thereto and at the distal end thereof, said band being of sufficient stiffness, and said segments extending laterally a sufiicient distance, to permit constriction of the central portion of the band, when placed around the pieces to be connected and pulled taut by hand application into contact with the outer of said pieces, while still exerting a force through the contact legs sufiicient to make permanent electrically conductive spring contact to the pieces to be connected, said band being transversely slotted centrally along the length of the band to provide a series of tab receiving slots (13).
2. An electrical connector as described in claim 1 in which said contact legs are tapered and are shorter on one side than on the other, and at least one of said slots has a terminal otfset for designating the side of said band having the shorter contact legs.
References Cited UNITED STATES PATENTS LARAMIE E. ASKIN, Primary Examiner.
LEWIS H. MYERS, Examiner.
J. F. RUGGIERO, Assistant Examiner.

Claims (1)

1. AN ELECTRICAL CONNECTOR USEFUL IN RAPIDLY AND EFFECTIVELY SECURING MECHANICAL AND PERMANENT ELECTRICAL CONNECTION BETWEEN A CABLE SHIELD AND AN OVERLAPPING STRESS CONES, THE CONNECTOR COMPRISING A SPRING METAL BAND HAVING AN ELONGATE TAB (11) DISPOSED AT ONE END THEREOF AND ADAPTED TO BE BENT BACK OVER ITSELF, SAID BAND HAVING A LONGITUDINAL CENTRAL PORTION ALONG BOTH SIDES OF WHICH UNIFORM RECTANGULAR LATERALLY EXTENDING RESILIENT SEGMENTS (14) ARE REGULARLY AND OPPOSITELY SPACED, EACH OF SAID SEGMENTS INCLUDING A CONTACT LEG (15, 16) DISPOSED AT A RIGHT ANGLE THERETO AND AT THE DISTAL END THEREOF, SAID BAND BEING OF SUFFICIENT STIFFNESS, AND SAID SEGMENTS EXTENDING LATERALLY A SUFFICIENT DISTANCE, TO PERMIT CONSTRICTION OF THE CENTRAL PORTION OF THE BAND, WHEN PLACED AROUND THE PIECES TO BE CONNECTED AND PULLED TAUT BY HAND APPLICATION INTO CONTACT WITH THE OUTER OF SAID PIECES, WHILE STILL EXERTING A FORCE THROUGH THE CONTACT LEGS SUFFICIENT TO MAKE PERMANENT ELECTRICALLY CONDUCTIVE SPRING CONTACT TO THE PIECES TO BE CONNECTED, SAID BAND BEING TRANSVERSELY SLOTTED CENTRALLY ALONG THE LENGTH OF THE BAND TO PROVIDE A SERIES OF TAB RECEIVING SLOTS (13).
US435559A 1965-02-26 1965-02-26 Electrical connector strap Expired - Lifetime US3324234A (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537060A (en) * 1969-01-08 1970-10-27 Minnesota Mining & Mfg Ground strap assembly
US4024486A (en) * 1975-07-14 1977-05-17 General Electric Company Outer locking turn for precut core
US4164621A (en) * 1977-08-08 1979-08-14 Amerace Corporation Cable shield connecting device
FR2427668A1 (en) * 1978-06-01 1979-12-28 Morel Atel Electromec Telephone cable junction sleeve with interconnecting splice - fits range of cable diameters and has adjustable flexible segmented sealing ring
US4239318A (en) * 1979-07-23 1980-12-16 International Telephone And Telegraph Corporation Electrical connector shield
US4406041A (en) * 1981-05-07 1983-09-27 The Boeing Company Anti-telescoping cable clamp assembly for wire bundles
US4411049A (en) * 1980-12-16 1983-10-25 Cristea Norm E Retainer strap
US4704498A (en) * 1986-01-31 1987-11-03 United Ropeworks (U.S.A) Inc. Cable connection and connectors
US4719315A (en) * 1986-01-31 1988-01-12 United Ropeworks (U.S.A.) Inc. Cable connectors
US4733464A (en) * 1986-01-31 1988-03-29 United Ropeworks (U.S.A.) Inc. Cable connectors
US4843686A (en) * 1987-06-23 1989-07-04 Proprietary Technology, Inc. Hose clamp
US4874337A (en) * 1988-11-23 1989-10-17 Amp Incorporated Method of mounting a replaceable EMI spring strip
US4910832A (en) * 1988-01-29 1990-03-27 Parker Hannifin Corporation Spring band clamp
US5437081A (en) * 1984-06-20 1995-08-01 Hans Oetiker Ag Maschinen-Und Apparate-Fabrik Hose clamp
USRE35384E (en) * 1989-09-20 1996-12-03 Hans Oetiker Ag Maschinen -Und Apparatefabrik Earless clamp
US20130248243A1 (en) * 2012-03-21 2013-09-26 Thomas & Betts International, Inc. Prefabricated electrical box
US10294974B2 (en) * 2015-02-17 2019-05-21 Amphenol Socapex Modular system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059947A (en) * 1958-05-12 1962-10-23 Aeroquip Corp Ventilated band clamp
US3099060A (en) * 1959-11-06 1963-07-30 Smith Douglas Coupling for flanged pipe elements
US3189961A (en) * 1963-09-17 1965-06-22 Rotron Mfg Co Hose clamp
US3217091A (en) * 1961-11-10 1965-11-09 Anaconda Wire & Cable Co Cable termination with anticorona shield
US3235925A (en) * 1964-01-23 1966-02-22 Republic Ind Corp Clamping bands
US3256577A (en) * 1964-09-15 1966-06-21 Draftex Ltd Clips

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059947A (en) * 1958-05-12 1962-10-23 Aeroquip Corp Ventilated band clamp
US3099060A (en) * 1959-11-06 1963-07-30 Smith Douglas Coupling for flanged pipe elements
US3217091A (en) * 1961-11-10 1965-11-09 Anaconda Wire & Cable Co Cable termination with anticorona shield
US3189961A (en) * 1963-09-17 1965-06-22 Rotron Mfg Co Hose clamp
US3235925A (en) * 1964-01-23 1966-02-22 Republic Ind Corp Clamping bands
US3256577A (en) * 1964-09-15 1966-06-21 Draftex Ltd Clips

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537060A (en) * 1969-01-08 1970-10-27 Minnesota Mining & Mfg Ground strap assembly
US4024486A (en) * 1975-07-14 1977-05-17 General Electric Company Outer locking turn for precut core
US4164621A (en) * 1977-08-08 1979-08-14 Amerace Corporation Cable shield connecting device
FR2427668A1 (en) * 1978-06-01 1979-12-28 Morel Atel Electromec Telephone cable junction sleeve with interconnecting splice - fits range of cable diameters and has adjustable flexible segmented sealing ring
US4239318A (en) * 1979-07-23 1980-12-16 International Telephone And Telegraph Corporation Electrical connector shield
US4411049A (en) * 1980-12-16 1983-10-25 Cristea Norm E Retainer strap
US4406041A (en) * 1981-05-07 1983-09-27 The Boeing Company Anti-telescoping cable clamp assembly for wire bundles
US5437081A (en) * 1984-06-20 1995-08-01 Hans Oetiker Ag Maschinen-Und Apparate-Fabrik Hose clamp
US4719315A (en) * 1986-01-31 1988-01-12 United Ropeworks (U.S.A.) Inc. Cable connectors
US4733464A (en) * 1986-01-31 1988-03-29 United Ropeworks (U.S.A.) Inc. Cable connectors
US4704498A (en) * 1986-01-31 1987-11-03 United Ropeworks (U.S.A) Inc. Cable connection and connectors
US4843686A (en) * 1987-06-23 1989-07-04 Proprietary Technology, Inc. Hose clamp
US4910832A (en) * 1988-01-29 1990-03-27 Parker Hannifin Corporation Spring band clamp
US4874337A (en) * 1988-11-23 1989-10-17 Amp Incorporated Method of mounting a replaceable EMI spring strip
USRE35384E (en) * 1989-09-20 1996-12-03 Hans Oetiker Ag Maschinen -Und Apparatefabrik Earless clamp
US20130248243A1 (en) * 2012-03-21 2013-09-26 Thomas & Betts International, Inc. Prefabricated electrical box
US10411450B2 (en) * 2012-03-21 2019-09-10 Thomas & Betts International Llc Prefabricated electrical box
US10294974B2 (en) * 2015-02-17 2019-05-21 Amphenol Socapex Modular system

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