Terminal block with protection

• US 5,451,170 A
• Filed: 09/28/1993
• Issued: 09/19/1995
• Est. Priority Date: 09/28/1993
• Status: Expired due to Term

• Current Assignee: Emerson Network Power Energy Systems North America Incorporated (Emerson Electric Company)
• Original Assignee: Reliance Comm/Tec Corporation
• Inventors: Suffi, Louis
• Primary Examiner(s): PIRLOT, DAVID
• Application Number:
  US08/127,895
• Time in Patent Office: 721 Days
• Field of Search: 439/395-405, 439/709-715, 439/721, 439/723-725, 439/620, 439/922
• US Class Current: 439/404
• CPC Class Codes: H01R 13/6666 with built-in overvoltage protection
• CPC Class Codes: H01R 4/2433 one part of the base being movable to push the cable into the slot
• CPC Class Codes: H01R 9/2641 with built-in overvoltage protection
• CPC Class Codes: H04Q 1/023 using sliding mechanisms for accessing the interior of the apparatus
• CPC Class Codes: H04Q 1/142 Terminal blocks for distribution frames
• CPC Class Codes: H04Q 1/146 with line protection means
• CPC Class Codes: Y10S 439/922 Telephone switchboard protector

Abstract

A terminal block mounts a plurality of insulation displacement connector type terminal clips formed of an electrically conductive material, each terminal clip having a base portion, an insulation displacing wire-engaging portions projecting outwardly from the base portion and a wire wrap post projecting outwardly from the base portion in a direction opposite to the wire-engaging portion. A block body formed of an electrical insulator material has an upper block section and a lower block section configured for releasably lockingly interengaging the upper block section. The upper block section and the lower block section each have a plurality of generally parallel spaced apart walls defining therebetween a plurality of open-ended cavities. Alignment structures are formed respectively on the upper and lower block sections for aligning respective ones of the cavities, such that one of the open ends of each cavity aligns with an open end of a corresponding cavity in the other of the upper and lower block sections, and such that opposite open ends of each cavity face outwardly when the upper and lower block sections are interengaged. Each cavity of the upper block section is configured for surroundingly receiving one of the terminal clips with the wire wrap post thereof extending toward the lower block section; and each cavity of the lower block section is configured for receiving a protector element therein. A plurality of connectors are provided, each operatively coupled with one of the wire wrap posts and configured for electrical engagement with a protector element.

Claims

1. A terminal block comprising:

a plurality of insulation displacement connector type terminal clips formed of an electrically conductive material, each terminal clip having a base portion, an insulation displacing wire-engaging portion projecting outwardly from said base portion and a wire wrap post projecting outwardly from said base portion in a direction opposite to said insulation displacing wire-engaging portion;

a block body formed of an electrical insulator material;

said block body comprising an upper block section and a lower block section configured for releasably lockingly interengaging said upper block section to form said block body, each of said upper block section and said lower block section having a plurality of generally parallel spaced apart walls defining therebetween a plurality of open-ended cavities;

alignment devices formed respectively on said upper and lower block sections for aligning respective ones of said cavities, such that one open end of each cavity aligns with an open end of a corresponding cavity in the other of the upper and lower block sections and such that an opposite open end of each cavity faces outwardly, when the upper and lower block sections are interengaged;

each of said cavities of said upper block section being configured for surroundingly receiving one of said terminal clips with said wire wrap post projecting toward said lower block section; and

each of said cavities of said lower block section being configured for receiving a protector element therein; and

a plurality of connectors, each connector being operatively coupled with one of said wire wrap posts and configured for electrical engagement with a protector element.

2. A terminal block according to claim 1 wherein said alignment devices include complementary formed interengagable projections and apertures formed on said upper and lower block sections.

3. A terminal block according to claim 1 wherein said alignment devices comprise a plurality of resiliently compressible posts projecting from one of said upper and lower block sections and a plurality of through apertures configured and located for receiving said posts and formed on the other of said upper and lower block sections.

4. A terminal block according to claim 1 and further including a barrier strip comprising a generally rectangular panel having a plurality of through openings located and aligned for receiving said wire-wrap posts therethrough, and configured for interfitting with said upper block section for engaging and positioning one of said terminal clips within each of said cavities.

5. A terminal block according to claim 1 wherein each of said connectors comprises a generally elongate tubular, radially resiliently expandable sleeve having one end configured for resiliently engaging in electrically conductive contact about a wire wrapped one of said wire wrap posts and an opposite end configured for resiliently engaging in electrically conductive contact about a terminal lead of a protector element.

6. A terminal block according to claim 5 and further including a barrier strip comprising a generally rectangular panel having a plurality of recesses located and aligned for receiving said wire-wrap posts therethrough, and configured for interfitting with said upper block section for engaging and positioning one of said terminal clips within each of said cavities.

7. A terminal block according to claim 5 and further including a plurality of gas tube protector elements, each having first and second projecting terminal leads and a projecting ground lead.

8. A terminal block according to claim 7 and further including an elongated ground strip element mounted intermediate said upper and lower blocks and having a plurality of spaced, projecting ground clips located and configured for engaging said ground leads of each of said gas tube protector elements in electrically conductive contact.

9. A terminal block according to claim 8 and further including an elongate shield formed of an electrical insulator material interposed about said ground clips for isolating said ground clips from electrical contact with said sleeves.

10. A terminal block according to claim 1 and further including a plurality of activators configured for selectively electrically coupling wires to said terminal clips;

and each cavity of said upper block section being configured for receiving an activator slidably movable therein between a first position for permitting the insertion of a conductor into said activator, and a second position for engaging a conductor inserted into said activator with the wire-engaging portion of a terminal clip located in the cavity.

11. A terminal block according to claim 10 wherein each of said activators comprises a gripping portion for manually engaging said activator for movement between said first and second positions, a pair of parallel spaced legs extending from said gripping portion and configured for sliding engagement with one of said cavities, the spacing between said legs being greater than the thickness of one of said terminal clips for permitting said legs to extend to either side of and slide freely with respect to one of said terminal clips, said legs further being of a length at least as great as a depth of insertion of an insulated conductor required for conductive engagement with said wire-engaging portion of said terminal clip, a pair of aligned wire-engaging surfaces formed in said legs for engaging an outer insulation portion of an insulated conductor to either side of an associated terminal clip located between said legs, said legs and said cavity being configured for aligning a portion of an insulated conductor intermediate said legs with said wire-engaging portion of said terminal clip for piercing the insulation of an insulated conductor and electrically engaging the conductor with the terminal clip when the activator is advanced from said first position to said second position.

12. A terminal block according to claim 11 wherein said wire-engaging surfaces of said activator are defined by aligned through openings in said legs thereof, said openings being configured and located for aligning a conductor with an entrance to said wire-engaging portion of said terminal clip when said activator is in said first position and for aligning an insulated conductor with said wire-engaging portion of said terminal clip for piercing the insulation thereof and causing electrically conductive contact of said insulated conductor with said wire-engaging portion when said activator is moved to said second position.

13. A terminal block according to claim 11 and further including detent means formed on said legs of said activator located for engaging said internal shoulder surfaces in each of said cavities for releasably retaining said activator in said second position.

14. A terminal block according to claim 11 wherein said legs of said activator include flexible retaining portions and wherein said walls of said upper and lower block portion include internal shoulder surfaces within said cavities for engagement with said flexible retaining portions to define said first position of said activator and to retain said legs slidably captive within said cavity.

15. A terminal block according to claim 14 wherein said flexible retaining portions terminate in laterally projecting barbs having downwardly facing ramp surfaces, said flexible retaining portions being sufficiently resilient to compress and thereafter return to an uncompressed condition as said legs are initially slidably introduced to said cavity to permit initial snapping engagement of said barbs over said shoulder surfaces.

16. A terminal block according to claim 6 and further including a quantity of potting material placed adjacent said barrier strip member for potting said one end of each of said plurality of sleeves and thereby maintaining said one end in electrical and mechanical engagement with a wire wrapped about a corresponding one of said wire wrap posts.

17. A terminal block according to claim 16 wherein said potting material engages said barrier strip with a force of engagement sufficient to permit pressing of a conductor into the wire-engaging portion of each of said terminal clips with a force sufficient to strip the insulation from the conductor and cause electrically conductive contact between the conductor and the wire-engaging portion while retaining said terminal clip in said cavity.

18. A terminal block comprising:

a block body formed of an electrical insulator material;

said block body having an upper block section and a lower block section configured for releasably lockingly interengaging said upper block section to form said block body, each of said upper block section and said lower block section having a plurality of generally parallel spaced apart walls defining therebetween a plurality of open-ended cavities;

alignment means formed respectively on said upper and lower block sections for aligning respective ones of said cavities;

such that one open end of each cavity aligns with an open end of a corresponding cavity in the other of the upper and lower block sections and such that the opposite open end of each cavity faces outwardly, when the upper and lower block sections are interengaged;

each of said cavities of said upper block section being configured for surroundingly receiving a terminal clip formed of an electrically conductive material, each terminal clip having a base portion, an insulation displacing wire-engaging portion projecting outwardly from said base portion and a wire wrap post projecting outwardly from said base portion in a direction opposite to said insulation displacing wire-engaging portion;

each of said cavities of said upper block section being configured for mounting one of said terminal clips with said wire wrap post projecting toward said lower block section, and each of said cavities of said lower block section being configured for receiving a protector element therein.

19. A terminal block according to claim 18 and further including a plurality of connectors, each operatively coupled with one of said wire wrap posts and configured for electrical engagement with a protector element.

20. A terminal block comprising:

a block body formed of an electrical insulator material having an upper block section and a lower block section releasably engaged to form said block body, each of said upper block section and said lower block section having a plurality of generally spaced apart walls defining therebetween a plurality of open-ended cavities;

alignment devices formed respectively on said upper and lower block sections for aligning respective ones of said cavities, such that one open end of each cavity aligns with an open end of a corresponding cavity in the other of the upper and lower block sections and such that an opposite open end of each cavity faces outwardly, when the upper and lower block sections are engaged;

a plurality of terminal clips formed of an electrically conductive material, each terminal clip having a base portion, an insulation displacing wire-engaging portion projecting from said base portion and a wire wrap post projecting from said base portion in a direction generally opposite said insulation displacing wire-engaging portion;

each of said cavities of said upper block section being configured for surroundingly receiving one of said terminal clips with said wire wrap post projecting toward said lower block section;

each of said cavities of said lower block section being configured for receiving a protector element therein; and

a plurality of connectors, each connector being operatively coupled with one of said wire wrap posts and configured for electrical engagement with a corresponding protector element.