US2908884A - Solderless connector - Google Patents

Solderless connector Download PDF

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Publication number
US2908884A
US2908884A US527379A US52737955A US2908884A US 2908884 A US2908884 A US 2908884A US 527379 A US527379 A US 527379A US 52737955 A US52737955 A US 52737955A US 2908884 A US2908884 A US 2908884A
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Prior art keywords
plug
insulated
conductors
shell
grooves
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Expired - Lifetime
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US527379A
Inventor
Robert E Wirsching
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AT&T Corp
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Bell Telephone Laboratories Inc
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Priority to US527379A priority Critical patent/US2908884A/en
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Publication of US2908884A publication Critical patent/US2908884A/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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2487—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating by means of the screw thread
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H01R4/5008—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using rotatable cam

Definitions

  • Fig. I mounted in an insulating strip and illustrates the manner in which an insulated the terminal which ruptures the insulation on-the conductors, at a plurality of locations on the ends thereof, and secures them firmly together.
  • Another object of the invention is the provision of a solderless terminal or binding post, wherein provision 1 ture-as shown in Fig. 2;
  • a further object of the invention is the provision of a solderless terminal or binding post which may comprise a number of individual assemblies multipled together or may comprise individual assemblies mounted on a common insulating member, each one of which is insulated from the other.
  • a still further object of the invention is the provision of a solderless type of binding post wherein each conductor in each assembly is insulated from each other and is connected individually to a portion of the assembly, each of which is insulated from the other, which in turn are provided with external electrical connections.
  • a still further object of the invention is the provision of a solderless terminal or binding post which may be fabricated, in part, from a single sheet of metal formed up to provide suitable shells or housings and externally extending electrical connections.
  • a plug member Located in the bore of the shell and extending thefull length thereof, is a plug member. her is profiled to provide aplurality of circumferentially disposed spaced apart grooves and ridges which are adapted to register with the protuberances onthe inner wall of the shell to provide a bearing surface for the plug.
  • Fig. 3 is a fragmentary bottom plan view of the struc- Fig. 4 is a fragmentary perspective view, partly in section, illustrating the binding post as shown in Figs. 1 and 2, in position on a strip of insulating material with the insulated conductors secured therein; and
  • Fig. 5 is a view similar to Fig. 4 but discloses a modified structurewherein the two halves of the shell of the binding post are insulated from each other to provide separate insulated connectors for each conductor, and the plug is of insulating material.
  • the structure comprises a tubular shell 10 and a cylindrical plug member 11. Both of these members are constructed of suitable conducting material with the shell 10 preferably fabricated from a strong resilient spring material, such as beryllium copper and the plug preferably of brass.
  • the shells 10 are fabricatedfrom a single sheet of metal and may comprise single or multiple units.
  • the shell 10 is composed of two similar halves A and B, formed up and joined along the seams SMSM.
  • the bottom portions of the halves A and B are joined together by the yoke member 12, which in turn is provided with downwardly extending soldering lugs 13 and 14 to facilitate the making of external electrical connections to the shell.
  • protuberances 15 and 16 Located on the inner wall of the shell 10, oppositely disposed and extending longitudinally, are a plurality of spaced apart protuberances or embossings 15 and 16, the inwardly extending edges of which are substantially sharp to provide insulation rupturing portions.
  • the protuberances 15 and 16 extend at an angle of approximately 45 degrees and are arranged to engage the circumferential "grooves GR in plug member 11 when the shell 10 is assembled, asshown' in Fig; 2; as by joining the two halves A and B along the seams SM with the plug member 11 in position between the two halves A and B.
  • the plug 11 is pro vided on its outer surface with oppositely disposed longitudinally extending grooves 17 and 18 Which extend the full length of the plug 11 and intersect the grooves GR GR to provide wire receiving grooves, as shown in detail in Fig. 1.
  • Insulated wires 19 and 20 are positioned in the grooves 17 and 18, as shown in Fig. 1; only wire 19 is depicted in groove 17 in Fig. 2 to allow a clearer depiction of the mating of the protuberances 16 and the plug 11.
  • the binding post or terminal of this invention may be mounted on a strip of insulating material IN with one end flush with the surface thereof and the other end extending therefrom and provided with lugs .13 and 14 for establishing an additional electrical connection thereto. If it is desired to multiple the shells 10, they may be constructed as shown in Fig. 1 wherein they are joined together by the integral portions 24-and25 which are part of the shell 10.
  • I provide an insulating plug member 30 and 'have insulated the two halves C and D of the shell from each other.
  • the shell may be positioned in the block or strip of insulating material IN thereby providing two external 1ugs26 and 27 which may be electrically connected to the conductors 28 and 29 positioned in the In this manner two individual insulated connections may be provided at each connector assembly as shown.
  • the assembly of the shell and plug 11 is first formed by closing the shell, along the seams SM, against the plug 11 so that the protuberances 15 and 16 properly engage the grooves GR.
  • the free ends of the conductors 19 and 20 are then inserted in the grooves 17 and 18-in-plug 11 as shown in Fig. 1, after which the plug is rotated 90 degrees against suitable stops in the shell 10 which, as shown in Fig. 2, forces the protuberanceslS and 16 to bite into the insulation on theconductors and establish electrical connection with the metal portions 22 and 23 of the conductors 19 and 20, thereby providing a low resistance'strong mechanical joint which may be readily made with a minimum amount of effort.
  • a solderless connector for insulated electrical conductors comprising a metallic tube, longitudinally dis- 1 posed protuberances on the inner wall thereof, a plug rotatably mounted therein and having circumferential grooves therein adapted to receive said protuberances, a
  • a solderless connector for insulated conductors in accordance with claim 1 characterized in this that a plurality of said connectors are encased in a block of molded insulating material to provide a terminal block having a plurality of connectors thereon.
  • a solderless connector for insulated electrical conductors comprising in combination an insulated elec trical conductor, two elongated trough-shaped metallic members insulated 'from each other along their meeting edges, defining a tubular shell, a non-metallic plug rotatably mounted in the bore thereof and in frictional engagement with the inner walls of said trough-shaped members, a longitudinally extending wire receiving groove in said plug for the reception of said conductor, and having circumferential grooves thereon communicating with said longitudinal grooves, means on said plug for the rotation thereof to wedge said conductor between said plug and the inner walls of said tubular shell, and inwardly extending protuberances on the inner walls of at least one of said trough-shaped members and disposed in said circumferential grooves, for rupturing the insulation on said-conductor whereby electrical contact is established between said conductor and one of said trough-shaped members.
  • a solderless connector for insulated electrical conductors comprising in combination a pair of insulated electricalconductors, two elongated trough-shaped metallic members insulated from each other along their meeting edges, defining a tubular shell, a non-metallic .plug having circumferentially disposed grooves thereon rotatably mounted in the bore thereof and in frictional engagement with the inner walls of said trough-shaped members, a pair of oppositely disposed longitudinally extending wire receiving grooves on said plug communicating with said circumferential grooves for the reception ofsaid conductors, means on said plug for the rotation thereof to wedge said conductors between said plug and the inner walls of the trough-shaped members,

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  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Description

Oct. 13, 1959 I R. E. WIRSCHING 2,908,884
SOLDERLESS CONNECTOR Filed Aug. 9, 1955 2 Sheets-Sheet l Fla. 2
l7 2/ ll/1/8 SM B IN l/ENTOR R. E. W/RSCH/NG ATTORNEY R. E. WlRSCHiNG 2,908,884
SOLDERLESS CONNECTOR Filed Aug. 9, 1955 2 Sheets-Sheet 2 INVENTOR R. E. W/RSCH/NG ATTORNEY United States SOLDERLESS CONNECTOR Robert E. Wirsching, Chatham, NJ., assignor to Bell Telephone Laboratories, Incorporated, New York, N.Y., a corporation of New York Application August 9, 1955, Serial No. 527,379
4 Claims. (Cl. 339-99) atent O receiving grooves;
2,908,884 Patented Oct. 13, 1959 turn, or 90 degrees, by means of a suitable tool engaging a slot in the top of the plug. This rotating action forces the conductors into intimate contact with the protuberances on the inner wall of the shell which ruptures the insulation on the conductors and establishes electrical specific illustrative embodiment of this invention, wherein insulated conductors are depicted in place in the wire Fig. 2' is a fragmentary view, partly in cross section,
, of the embodiment of Fig. I mounted in an insulating strip and illustrates the manner in which an insulated the terminal which ruptures the insulation on-the conductors, at a plurality of locations on the ends thereof, and secures them firmly together.
Another object of the invention is the provision of a solderless terminal or binding post, wherein provision 1 ture-as shown in Fig. 2;
is made for connecting a plurality of insulated conductors to a common terminal, which in'turn-is provided with means for making external connections thereto.
A further object of the invention is the provision of a solderless terminal or binding post which may comprise a number of individual assemblies multipled together or may comprise individual assemblies mounted on a common insulating member, each one of which is insulated from the other.
A still further object of the invention is the provision of a solderless type of binding post wherein each conductor in each assembly is insulated from each other and is connected individually to a portion of the assembly, each of which is insulated from the other, which in turn are provided with external electrical connections.
A still further object of the invention is the provision of a solderless terminal or binding post which may be fabricated, in part, from a single sheet of metal formed up to provide suitable shells or housings and externally extending electrical connections.
The combined terminal and binding post of this inin oppositely disposed relation, a plurality of inwardly extending protuberances or embossings, the inner ends" of which present substantially sharp edges.
Located in the bore of the shell and extending thefull length thereof, is a plug member. her is profiled to provide aplurality of circumferentially disposed spaced apart grooves and ridges which are adapted to register with the protuberances onthe inner wall of the shell to provide a bearing surface for the plug.
Located on the plug member, in oppositely disposed relation, and extending longitudinally the full length thereof, are two conductor receiving grooves or slots. These slots are arranged to receive the ends of the insulated conductors to be connected together.
After the insulated conductors have been inserted in their respective grooves, the plugs are rotated one quarter This plug memconductor is forced into intimate contact with the protuberances on the inner wall of the shell, the rupturing of the insulation and the establishing of electrical contact with the conductor;
Fig. 3 is a fragmentary bottom plan view of the struc- Fig. 4 is a fragmentary perspective view, partly in section, illustrating the binding post as shown in Figs. 1 and 2, in position on a strip of insulating material with the insulated conductors secured therein; and
Fig. 5 is a view similar to Fig. 4 but discloses a modified structurewherein the two halves of the shell of the binding post are insulated from each other to provide separate insulated connectors for each conductor, and the plug is of insulating material.
In the embodiment of my invention depicted in Figs. 1 to 4, inclusive, the structure comprises a tubular shell 10 and a cylindrical plug member 11. Both of these members are constructed of suitable conducting material with the shell 10 preferably fabricated from a strong resilient spring material, such as beryllium copper and the plug preferably of brass.
The shells 10 are fabricatedfrom a single sheet of metal and may comprise single or multiple units.
As shown in Fig. 1, the shell 10 is composed of two similar halves A and B, formed up and joined along the seams SMSM. The bottom portions of the halves A and B are joined together by the yoke member 12, which in turn is provided with downwardly extending soldering lugs 13 and 14 to facilitate the making of external electrical connections to the shell.
Located on the inner wall of the shell 10, oppositely disposed and extending longitudinally, are a plurality of spaced apart protuberances or embossings 15 and 16, the inwardly extending edges of which are substantially sharp to provide insulation rupturing portions. The protuberances 15 and 16 extend at an angle of approximately 45 degrees and are arranged to engage the circumferential "grooves GR in plug member 11 when the shell 10 is assembled, asshown' in Fig; 2; as by joining the two halves A and B along the seams SM with the plug member 11 in position between the two halves A and B.
As shown in the various figures, the plug 11 is pro vided on its outer surface with oppositely disposed longitudinally extending grooves 17 and 18 Which extend the full length of the plug 11 and intersect the grooves GR GR to provide wire receiving grooves, as shown in detail in Fig. 1. Insulated wires 19 and 20 are positioned in the grooves 17 and 18, as shown in Fig. 1; only wire 19 is depicted in groove 17 in Fig. 2 to allow a clearer depiction of the mating of the protuberances 16 and the plug 11.
When the plug 11 and the shell 10, as shown in Fig. 1, are assembled as shown in Fig. 2, the plug is adapted to rotate but is prevented from longitudinal movement due insulating plug member 30.
to the engagement of the protuberances 15 and 16 with or 90 degrees by'means of a suitable tool (not shown) engagingthe slot 21, the protuberances 15 and 16 rupture the insulation on the conductors 19 and 20 and establish electrical contact with the metal portions 22 and 23 thereof, as clearly seen in Fig. 2 where, however, as noted above, only conductor 19 is depicted.
As shown in Figs. 2, 3 and 4, the binding post or terminal of this invention may be mounted on a strip of insulating material IN with one end flush with the surface thereof and the other end extending therefrom and provided with lugs .13 and 14 for establishing an additional electrical connection thereto. If it is desired to multiple the shells 10, they may be constructed as shown in Fig. 1 wherein they are joined together by the integral portions 24-and25 which are part of the shell 10.
In the modified form of my invention as illustrated in .Fig. 5, I provide an insulating plug member 30 and 'have insulated the two halves C and D of the shell from each other. The shell may be positioned in the block or strip of insulating material IN thereby providing two external 1ugs26 and 27 which may be electrically connected to the conductors 28 and 29 positioned in the In this manner two individual insulated connections may be provided at each connector assembly as shown.
In the practicing of this invention with respect to the termination of insulated conductors, the assembly of the shell and plug 11 is first formed by closing the shell, along the seams SM, against the plug 11 so that the protuberances 15 and 16 properly engage the grooves GR. The free ends of the conductors 19 and 20 are then inserted in the grooves 17 and 18-in-plug 11 as shown in Fig. 1, after which the plug is rotated 90 degrees against suitable stops in the shell 10 which, as shown in Fig. 2, forces the protuberanceslS and 16 to bite into the insulation on theconductors and establish electrical connection with the metal portions 22 and 23 of the conductors 19 and 20, thereby providing a low resistance'strong mechanical joint which may be readily made with a minimum amount of effort.
While Ihave shown and described my improved solderless connector as applied to a single binding post, it is readily apparent that it may be constructed in a manner to provide a plurlity of binding posts multipled together.
What'is claimed is: 1. A solderless connector for insulated electrical conductors comprising a metallic tube, longitudinally dis- 1 posed protuberances on the inner wall thereof, a plug rotatably mounted therein and having circumferential grooves therein adapted to receive said protuberances, a
longitudinally extending groove on the periphery of said plug and intersecting the circumferential grooves thereof,
whereby the rotation of said plug wedges a conductor positioned in said longitudinal groove between said protuberances and said circumferential grooves to rupture the insulation on the conductor and establish electrical contact between said metallic tube and the conductor positioned therein.
2. A solderless connector for insulated conductors in accordance with claim 1 characterized in this that a plurality of said connectors are encased in a block of molded insulating material to provide a terminal block having a plurality of connectors thereon.
3. A solderless connector for insulated electrical conductors comprising in combination an insulated elec trical conductor, two elongated trough-shaped metallic members insulated 'from each other along their meeting edges, defining a tubular shell, a non-metallic plug rotatably mounted in the bore thereof and in frictional engagement with the inner walls of said trough-shaped members, a longitudinally extending wire receiving groove in said plug for the reception of said conductor, and having circumferential grooves thereon communicating with said longitudinal grooves, means on said plug for the rotation thereof to wedge said conductor between said plug and the inner walls of said tubular shell, and inwardly extending protuberances on the inner walls of at least one of said trough-shaped members and disposed in said circumferential grooves, for rupturing the insulation on said-conductor whereby electrical contact is established between said conductor and one of said trough-shaped members.
4. A solderless connector for insulated electrical conductors comprising in combination a pair of insulated electricalconductors, two elongated trough-shaped metallic members insulated from each other along their meeting edges, defining a tubular shell, a non-metallic .plug having circumferentially disposed grooves thereon rotatably mounted in the bore thereof and in frictional engagement with the inner walls of said trough-shaped members, a pair of oppositely disposed longitudinally extending wire receiving grooves on said plug communicating with said circumferential grooves for the reception ofsaid conductors, means on said plug for the rotation thereof to wedge said conductors between said plug and the inner walls of the trough-shaped members,
and inwardly extended protuberances on the inner walls of each of said trough-shaped members and extending partially into said circumferential grooves for rupturing the insulation on said conductors, thereby establishing-electrical contact between said conductors and said trough-shaped members.
-References Cited in the file of this patent UNITED STATES PATENTS
US527379A 1955-08-09 1955-08-09 Solderless connector Expired - Lifetime US2908884A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139314A (en) * 1961-04-17 1964-06-30 Daniel B Miller Terminal
US3140138A (en) * 1962-08-30 1964-07-07 Reliable Electric Co Connector block for ribbon cable or the like
US3140909A (en) * 1962-06-12 1964-07-14 Itt Electrical terminal connector
US3405385A (en) * 1966-02-02 1968-10-08 Western Electric Co Quick connect solderless wire connector
US3492629A (en) * 1965-10-08 1970-01-27 Paul Hirsch Device for joining cables
US3649955A (en) * 1970-06-19 1972-03-14 Microdot Inc Snap-in bulb socket
US3668301A (en) * 1970-09-23 1972-06-06 Harry A Faulconer Means and methods of joining conductors
US3980379A (en) * 1972-08-23 1976-09-14 The Post Office Electrical connector
US4029383A (en) * 1973-11-20 1977-06-14 The Post Office Electrical connectors
US4563054A (en) * 1982-10-19 1986-01-07 C. A. Weidmuller Gmbh & Co Spring-pressure connector for electrical conductors
FR2593969A1 (en) * 1986-01-24 1987-08-07 Simon Guy Self-stripping connection device (insulation displacement connector)
US4764124A (en) * 1987-04-20 1988-08-16 Guy Simon Self stripping connection device
FR2633456A1 (en) * 1988-06-24 1989-12-29 Arnould App Electr Insulation-displacement connector for an electrical conductor
US4929190A (en) * 1987-10-13 1990-05-29 Arnould Fabrique D'appareillage Electrique Insulation displacement connector
US4964816A (en) * 1990-02-20 1990-10-23 Plastics One, Inc. Electrical connector and method of making the same
FR2686210A1 (en) * 1992-01-15 1993-07-16 Masclaux Paul Interconnection device for a distribution box of telephone lines
US5254015A (en) * 1991-10-07 1993-10-19 Amp Incorporated Insulation displacing barrel terminal
US5421747A (en) * 1994-03-28 1995-06-06 The Whitaker Corporation Connector assembly
US5453023A (en) * 1992-05-08 1995-09-26 The Whitaker Corporation Terminal block for interconnecting an uninsulated conductive lead portion to another conductor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451569A (en) * 1920-12-06 1923-04-10 Frederick Roland Permutation switch
GB205930A (en) * 1923-05-10 1923-11-01 August Rothschild Improvements in and relating to terminals for electrical work
US2291434A (en) * 1940-10-30 1942-07-28 Orville C Hollopeter Connector and loading coil for electric conductors
US2416943A (en) * 1945-08-03 1947-03-04 Nicolazzo John Connector for conductor wires
US2434475A (en) * 1944-09-21 1948-01-13 Merchandising Engineers Inc Electrical connector
US2618679A (en) * 1949-04-18 1952-11-18 William H Cook Pronged plug with rotatable core having cord insulation and conductor anchorage means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451569A (en) * 1920-12-06 1923-04-10 Frederick Roland Permutation switch
GB205930A (en) * 1923-05-10 1923-11-01 August Rothschild Improvements in and relating to terminals for electrical work
US2291434A (en) * 1940-10-30 1942-07-28 Orville C Hollopeter Connector and loading coil for electric conductors
US2434475A (en) * 1944-09-21 1948-01-13 Merchandising Engineers Inc Electrical connector
US2416943A (en) * 1945-08-03 1947-03-04 Nicolazzo John Connector for conductor wires
US2618679A (en) * 1949-04-18 1952-11-18 William H Cook Pronged plug with rotatable core having cord insulation and conductor anchorage means

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139314A (en) * 1961-04-17 1964-06-30 Daniel B Miller Terminal
US3140909A (en) * 1962-06-12 1964-07-14 Itt Electrical terminal connector
US3140138A (en) * 1962-08-30 1964-07-07 Reliable Electric Co Connector block for ribbon cable or the like
US3492629A (en) * 1965-10-08 1970-01-27 Paul Hirsch Device for joining cables
US3405385A (en) * 1966-02-02 1968-10-08 Western Electric Co Quick connect solderless wire connector
US3649955A (en) * 1970-06-19 1972-03-14 Microdot Inc Snap-in bulb socket
US3668301A (en) * 1970-09-23 1972-06-06 Harry A Faulconer Means and methods of joining conductors
US3980379A (en) * 1972-08-23 1976-09-14 The Post Office Electrical connector
US4029383A (en) * 1973-11-20 1977-06-14 The Post Office Electrical connectors
US4563054A (en) * 1982-10-19 1986-01-07 C. A. Weidmuller Gmbh & Co Spring-pressure connector for electrical conductors
FR2593969A1 (en) * 1986-01-24 1987-08-07 Simon Guy Self-stripping connection device (insulation displacement connector)
US4764124A (en) * 1987-04-20 1988-08-16 Guy Simon Self stripping connection device
US4929190A (en) * 1987-10-13 1990-05-29 Arnould Fabrique D'appareillage Electrique Insulation displacement connector
FR2633456A1 (en) * 1988-06-24 1989-12-29 Arnould App Electr Insulation-displacement connector for an electrical conductor
US4964816A (en) * 1990-02-20 1990-10-23 Plastics One, Inc. Electrical connector and method of making the same
US5254015A (en) * 1991-10-07 1993-10-19 Amp Incorporated Insulation displacing barrel terminal
FR2686210A1 (en) * 1992-01-15 1993-07-16 Masclaux Paul Interconnection device for a distribution box of telephone lines
US5453023A (en) * 1992-05-08 1995-09-26 The Whitaker Corporation Terminal block for interconnecting an uninsulated conductive lead portion to another conductor
US5421747A (en) * 1994-03-28 1995-06-06 The Whitaker Corporation Connector assembly

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