US3803534A - Connection terminal with screw type tightener - Google Patents

Connection terminal with screw type tightener Download PDF

Info

Publication number
US3803534A
US3803534A US00318135A US31813572A US3803534A US 3803534 A US3803534 A US 3803534A US 00318135 A US00318135 A US 00318135A US 31813572 A US31813572 A US 31813572A US 3803534 A US3803534 A US 3803534A
Authority
US
United States
Prior art keywords
screw
terminal according
jaw
locking screw
electric terminal
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
US00318135A
Other languages
English (en)
Inventor
J Debaigt
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.)
Cegelec SA
Original Assignee
Cegelec SA
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 Cegelec SA filed Critical Cegelec SA
Application granted granted Critical
Publication of US3803534A publication Critical patent/US3803534A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • H01R4/52—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw which is spring loaded

Definitions

  • An electric terminal with an axially connected screw-type tightener according to the invention is characterized in that the clamp screw is fixed to the terminal body by means of a ring which acts as a pivot for it and in that the said screw drives a mobile jaw 'which is guided in the direction of a fixed jaw by a ramp formed in the terminal body.
  • the invention concerns connection terminals having screw-type clamping means for electrical conductor wires wherein the direction in which the electric conductor wires are inserted is slightly inclined in relation to the axis of the screw.
  • Terminals of this type generally comprise a pair of clamping jaws, the one being fixed, the other mobile, a lock screw and a body which is used for accommodating and supporting the clamping jaws and the lock screw.
  • the lock screw moves in a tapping formed in the terminal body or in a nut supported by that body. It keeps a fixed direction, oblique in relation to the clamping plane of the jaws and close to that in which the electric conductor wires are inserted in the terminal. It drives, in a linear movement in that fixed direction, the mobile jaw to meet the fixed jaw.
  • That embodiment has various disadvantages.
  • the bringing of the jaws closer together is accompanied by a shearing movement in the direction in which the electric conductor wires are inserted in the terminal, this causing a movement of these conductor wires at the instant when the lock screw is tightened.
  • the shearing movement increases when, with a view to reducing the bulk of the terminal, the angle between the axis of the locking screw and the direction in which the electric conductor wires are inserted in the terminal is reduced.
  • the reactions of the clamping forces being exerted transversally on the shank of the locking screw tend to deform it.
  • the aim of the invention is to overcome these disadvantages. Its aim is more particularly a terminal having an axial connecting screw, in which the bringing of the jaws closer together is effected with a shearing movement of slight amplitude and in which the lock screw supports only axial efforts. It also has for its aim a connection terminal having screw-type clamping means and slight bulk and being simple and inexpensive to manufacture.
  • An axial connection terminal comprises: an input face for the electric conductor wires on a fixed jaw and an access face giving access to the head of an operating screw, and a supporting face for a mobile jaw, the said screw making it move linearly along its axis, the said clamping jaws and the said screw being housed in a body.
  • the end of the locking screw is slightly inclined towards the direction in which the conductor wires are inserted on the fixed jaw, the said end being fixed to a ring pivoting about an axis perpendicular to that direction, the said mobile jaw being provided with means for. guiding its movement comprising, in cooperation, a pair of lugs, with a pair of ramps having a greater inclination on the said direction, so that the sliding of the said lugs along the said ramps determines the-pivoting of the screw.
  • the ring comprises a tapping in which the shank of the locking screw moves whereas the mobile jaw is installed on the locking screw and rests against the shoulder on the head of the latter.
  • the ring is trapped by the end of the shank of the locking screw for which it acts as a thrust bearing, whereas the mobile jaw is provided with a tapping in which the shank of the locking screw moves.
  • FIGS. 1 and 2 are longitudinal cross-sections respectively, internal and external to the body of a terminal according to the invention.
  • 1 designates the support stand of an electric device in which is arranged a connection terminal having screw-type clamping means according to the invention. That terminal comprises on the right hand side an input face 20, giving access to a pair of clamping jaws, the one 3 being fixed, the other 4 being mobile, a locking screw 5 and a body 2 in the form ofa U- shaped trough which is used for housing and supporting the jaws 3 and 4 and the screw 5.
  • the bottom 21 of the trough supports the fixed jaw 3 which is constituted by a strip of a substance which is a good conductor held against the bottom of the trough 2. It is provided in the clamping zone, with transversal serrations enabling secure fixing of the electric conductor wires 7 to be connected together; This strip extends on the outside of the terminal towards a load, not shown. Its end 11 turned towards the access in the terminal of the conductor wires 7 is folded back against the rim of the end of the bottom 21 of the trough 2. It rests against a rib 12 of the support stand 1 and maintains the trough 2 on the inside of the said support stand.
  • the locking screw 5 is arranged between the wings 22 and 23 of the gutter 2.
  • the end of the screw is slightly inclined towards the base of the trough so that the direction of its axis forms a very small angle with the direction in which the electric conductor wires 7 are inserted. It moves in a tapped ring 6 which rests against the opposite end of the trough 2 to that in which the conductor wires 7 are inserted, by means of diametrically opposed studs 13.
  • the bearing surfaces of the studs 13 of the ring 6 are formed by cut-out portions 8 in the form of the ridge of the rim of the wings 22 and 23 of the trough 2.
  • the pressing of the studs 13 of the ring 6 defines a pivoting axis transversal to the wings 22 and 23 and perpendicular to the direction in which the conductor wires are inserted; its trace is embodied at 24 in FIG. 2.
  • the mobile jaw 4 slides between the wings 22 and 23 of the trough 2. It is driven by the locking screw 5 which extends through it. It comprises two diametrically opposite lugs 10 which slide in two parallel slots. 9 and 10 formed face to face in the wings 22 and 23 of the trough 2; these slots have a greater inclination than that of the locking screw 5 in relation to the direction in which the electric conductor wires 7 are inserted.
  • the various parts constituting the terminal described in FIGS. 1 and 2 are unlosable.
  • the ring 6 is held in place against the cut out portions 8 of the trough 2 by the contour of the cavity of the terminal in the support stand 1 which has a circular contraction 16 forming, with the cut out portions 8, the walls of cavities from which the studs 13 of the ring 6 cannot escape.
  • the mobile jaw 4 is trapped by the locking screw 5.
  • the locking screw 5 When the locking screw 5 is loosened, the mobile jaw 4 is stopped in its travel by a stop 14.
  • the length of the thread of the locking screw 5 is such that the latter escapes from the tapping of the ring 6 when the mobile jaw 4 arrives at the end of its travel against that stop 14.
  • the locking screw 5 comprises, on the end of its shank, a cylindrical smooth portion 15 having a smaller diameter than its thread. That smooth portion 15 remains engaged in the ring 6 when the locking screw 5 is completely loosened. It enables the thread of the locking screw 5 to be automatically engaged in the tapping of the ring 6 at the beginning'of each clamping operation.
  • FIG. 1 shows the locking screw 5 in the loosened position; the mobile jaw is stopped by the stop 14, the end of the locking screw shank is kept engaged in the ring 6 by its smooth portion 15.
  • FIG. 2 shows the locking screw in the average clamping position.
  • the pitch of the locking screw 5 is engaged in the tappingof the ring 6, the mobile jaw 4 is just about in the middle of its travel; it is guided in the direction of the fixed jaw 3 by the studs and the slots 9 and 19.
  • the operation of that terminal is simple.
  • the locking screw 5 is free to pivot in a plane parallel to the clamping forces which are exerted between the jaws 3 and 4. It is subjected to no transversal stress and is not in danger of being deformed.
  • the clamping jaws 3 and 4 move away automatically from each other when the locking screw 5 is loosened and does not require any return spring.
  • the shearing movement of the mobile jaw 4 in relation to the fixed jaw 3 is that which is obtained with a terminal of known type using a locking screw having a fixed direction having the sameinclination in relation to the direction in which the conductorwires are inserted in the terminal as the guide slots 3. But that terminal would have a much greater bulk, for the direction of its locking screw would form,'with that same inserting direction, an angle which is much more open.
  • the manufacturing of the terminal described is simple.
  • a molded substance may be used for the support stand 1.
  • the body 2 of the terminal in the form of a trough may be produced from a steel sheet by folding and cutting out.
  • the ring 6 may be produced from a nut whose outer'contour only needs to be fashioned.
  • connection terminals according to the invention are of particular interest for producing the electrical connection of devices whose support stand is accessible only on one side; clamping is progressive.
  • an electric axial connection terminal comprising; fixed and mobile jaws; an input face for electric conductor wires on said fixed jaw and an access face for access to the head of an operating screw and for supporting said mobile jaw, said screw moving it linearly along its axis, said clamping jaws and said screw being housed in a body, the improvementwherein: the end of the screw is slightly inclined towards the direction in' which the conductor wires are inserted in the fixed jaw, said end being connected to a ring pivoting about an axis perpendicular to that direction, said mobile jawbeing provided with means for guiding its movement comprising in cooperation; a pair of lugs with a pair of ramps having a greater inclination in the said direction, so that the sliding of said lugs along said ramps determines the extent of pivoting of said screw.
  • the ring comprises a tapping in which the locking screw moves, and the mobile jaw is fitted onto the locking screw and rests against the shoulder of its head.
  • the body of the terminal is constituted by a U- shaped trough at whose bottom the clamping of the conductor wires is effected.
  • the body of the terminal is constituted by a U- shaped trough at whose bottom the clamping of the conductor wires is effected.
  • said trough comprisestwo cut out portions forming ridges facing said ring, each on the rim of the trough at the opposite end to that in which the conductor wires are inserted, and the ring comprises two diameterically opposite studs which rest against said cut out portions, which determine therein, for each inclination of the screw, a pivot axis.
  • the ramps comprise two parallel slots arranged face to face in the wings of the trough and leading to the input face of the terminal
  • the mobile jaw comprises two diametrically opposite lugs which slide in the slots, providing a means for guiding it towards the fixed jaw.
  • the ramps comprise two parallel slots arranged face to face in the wings of the trough and leading to the input face of the terminal
  • the mobile jaw comprises two diametrically opposite lugs which slide in the slots, providing a means for guiding it towards the fixed jaw.
  • the fixed jaw is constituted by a conductive strip held against the bottom of the trough and provided with transversal serrations in the clamping zone.
  • the electric terminal according to claim 1 further comprising: means for making its mobile parts unlosable.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Clamps And Clips (AREA)
US00318135A 1971-12-31 1972-12-26 Connection terminal with screw type tightener Expired - Lifetime US3803534A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7147847A FR2166646A5 (it) 1971-12-31 1971-12-31

Publications (1)

Publication Number Publication Date
US3803534A true US3803534A (en) 1974-04-09

Family

ID=9088516

Family Applications (1)

Application Number Title Priority Date Filing Date
US00318135A Expired - Lifetime US3803534A (en) 1971-12-31 1972-12-26 Connection terminal with screw type tightener

Country Status (12)

Country Link
US (1) US3803534A (it)
BE (1) BE792897A (it)
BR (1) BR7209197D0 (it)
CA (1) CA973626A (it)
CH (1) CH564857A5 (it)
DE (1) DE2262728C2 (it)
ES (1) ES409825A1 (it)
FR (1) FR2166646A5 (it)
GB (1) GB1397577A (it)
IT (1) IT972785B (it)
NL (1) NL7217753A (it)
SE (1) SE376516B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619497A (en) * 1984-02-28 1986-10-28 Elektro-Apparatebau Olten Ag. Device for establishing connections between electrical conductors
US4810212A (en) * 1987-08-10 1989-03-07 Connectron, Inc. Terminal blocks for one-side wire entry and screw access
US5019445A (en) * 1989-06-05 1991-05-28 Charles Samelson Co. White blackout fabric
US5292263A (en) * 1993-01-12 1994-03-08 The Whitaker Corporation Electrical connector
US6048233A (en) * 1998-05-11 2000-04-11 Mainstream Engineering Corp. Retrofit arrangement for attaching leads to compressor motor terminals
CN115084939A (zh) * 2022-06-07 2022-09-20 苏州恩德弗智能科技有限公司 一种电动缸及电动缸系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520561A1 (fr) * 1982-01-22 1983-07-29 Alsthom Cgee Borne electrique a raccordement axial
FR2545656B2 (fr) * 1982-01-22 1988-06-17 Alsthom Cgee Borne electrique a raccordement axial
DE19512337A1 (de) * 1995-04-01 1996-10-02 Weidmueller Interface Schraubklemme für elektrische Leiter
DE19801331C2 (de) * 1998-01-16 2003-09-25 Hayo Joerg Modulares Mehrfach-Stern-Schraubklemmen-System

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675893C (de) * 1937-05-13 1939-05-20 Siemens Schuckertwerke Akt Ges Kontaktklemme zum Anschliessen elektrischer Leitungen an Installationsgeraete
DE1078204B (de) * 1952-02-22 1960-03-24 Friedrich Wieland Dipl Ing Dr Klemme
FR92460E (fr) * 1966-06-21 1968-11-15 Telemecanique Electrique Perfectionnements aux connecteurs électriques
DE6942001U (de) * 1969-10-27 1970-02-05 Weidmueller Kg C Schraubklemme fuer elektrische leitungen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619497A (en) * 1984-02-28 1986-10-28 Elektro-Apparatebau Olten Ag. Device for establishing connections between electrical conductors
US4810212A (en) * 1987-08-10 1989-03-07 Connectron, Inc. Terminal blocks for one-side wire entry and screw access
US5019445A (en) * 1989-06-05 1991-05-28 Charles Samelson Co. White blackout fabric
US5292263A (en) * 1993-01-12 1994-03-08 The Whitaker Corporation Electrical connector
US6048233A (en) * 1998-05-11 2000-04-11 Mainstream Engineering Corp. Retrofit arrangement for attaching leads to compressor motor terminals
CN115084939A (zh) * 2022-06-07 2022-09-20 苏州恩德弗智能科技有限公司 一种电动缸及电动缸系统
CN115084939B (zh) * 2022-06-07 2024-01-05 浙江爱多克自控阀门科技有限公司 一种电动缸及电动缸系统

Also Published As

Publication number Publication date
FR2166646A5 (it) 1973-08-17
BR7209197D0 (pt) 1973-10-09
IT972785B (it) 1974-05-31
NL7217753A (it) 1973-07-03
BE792897A (fr) 1973-06-18
CA973626A (en) 1975-08-26
DE2262728C2 (de) 1982-05-13
SE376516B (it) 1975-05-26
DE2262728A1 (de) 1973-07-05
GB1397577A (en) 1975-06-11
ES409825A1 (es) 1975-12-01
CH564857A5 (it) 1975-07-31

Similar Documents

Publication Publication Date Title
US3803534A (en) Connection terminal with screw type tightener
KR950012465B1 (ko) 케이블 단부의 접속장치
US5192234A (en) Electrical terminal and a housing for electrical apparatus including such a terminal
US3788582A (en) Connector for non-metallic sheathed cable
US3668612A (en) Cable connector
US3344394A (en) Limited engagement lug assembly
GB1499996A (en) Electrical connecting device for connecting an electrical conductor to an accumulator
GB1320022A (en) Electrical connectors
US3685148A (en) Method for making a wire splice
US3041574A (en) Transformer connector
US6604956B2 (en) Self-stripping connecting device for two electric cables
JPS63164179A (ja) クランプ装置
JPH0443392B2 (it)
US3585571A (en) Electric wire connector with insulation piercing means
US3464055A (en) Electrical connector
FR2721142A1 (fr) Appareil électrique muni d'une borne à vis.
US3980381A (en) Cable connector
US4053202A (en) Lay-in connectors
US2388724A (en) Wire connector
US3491331A (en) Electric wire connector
US3072881A (en) Collar bushing terminal
US2995615A (en) Electric connectors
US5022867A (en) Electrical terminal
US3910670A (en) Electrical connectors with insulation piercing contacts
GB2350941A (en) A connector with mechanical cable tension relief and an earth contact