US3376545A - Mechanical wire joint - Google Patents

Mechanical wire joint Download PDF

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Publication number
US3376545A
US3376545A US489663A US48966365A US3376545A US 3376545 A US3376545 A US 3376545A US 489663 A US489663 A US 489663A US 48966365 A US48966365 A US 48966365A US 3376545 A US3376545 A US 3376545A
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United States
Prior art keywords
locking member
wire
cavity
spring
plug
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Expired - Lifetime
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US489663A
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Anzini Renato
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Individual
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Individual
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Publication date
Priority claimed from CH1323964A external-priority patent/CH403912A/en
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Publication of US3376545A publication Critical patent/US3376545A/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
    • H01R4/28—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/10—Quick-acting fastenings; Clamps holding in one direction only
    • F16G11/105—Clamps holding in one direction only
    • F16G11/108—Clamps holding in one direction only using a ball or a cylinder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2101/00—One pole
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y10T403/602—Biased catch or latch by separate spring

Definitions

  • a recess in the exposed surface of the locking member permits a pointed tool securely to engage the member for depressing the same against the spring to permit insertion of a wire or release of a clamped wire.
  • the preferred locking member is drop shaped having a hemispherical outer portion and a tapering inner portion.
  • a further inconvenience of the conventional devices consists in that contact between the ball and the conductor is limited to practically one point only.
  • the present invention provides a device which avoids the above mentioned difficulties and is also usable as a mechanical joint. It has a tubular shell whose cavity tapers toward an open end normally closed by a movable locking member under the urging of a resilient element. A recess in an outward face of the locking member is adapted to receive a pointed tool for releasing a wire, cable or the like that is clamped between the surface of the locking member and the inner wall of the shell.
  • the locking member preferably is drop-shaped, an essentially semi-spherical portion being directed outward, and an essentially conical portion being directed inward and partly surrounded by a spring which pushes the looking member into its closing position.
  • the semi-spherical portion of the member is formed with a central recess for receiving a pointed tool.
  • FIG. 1 shows another unipolar electric plug in an axially sectional view.
  • FIG. 2 illustrates an element of the plug shown in FIG. 1 in elevation.
  • FIG. 3 is a plan view of said element.
  • the plug has a brass shell 1 of cylindrical form whose cavity 5 has a cylindrical lower portion (El-F), an intermediate conically tapering portion (FH), a cylindrical throat (HI) and finally an outwardly open, conically flaring portion (IL).
  • El-F cylindrical lower portion
  • FH intermediate conically tapering portion
  • HI cylindrical throat
  • IL outwardly open, conically flaring portion
  • the lower cylindrical portion (EF) is seated by a States Patent 0 press fit on the cup shaped end 13' of the plug pin 13 which accommodates the lower end of a tapering helical spring 4 the upper end of which coaxially engages a conical inner portion CDA (FIG. 2) of a drop-shaped locking member 2 having an .outer semi-spherical portion A-B-C.
  • the semi-spherical portion A-B-C is provided with a central recess 2'.
  • the plug is operated as follows:
  • the wire is released by inserting a pointed tool (a needle, a nail or the like) into the recess 2 of the member 2 and pushing the same against the action of the spring 4.
  • a pointed tool a needle, a nail or the like
  • a wire or cable which is not sufliciently rigid for overcoming the spring 4 is inserted after displacement of the member 2 by means of a pointed tool. When the pressure on the member 2 is released, the wire is strongly held between the member 2 and the body 1.
  • the conical portion of the drop-shaped locking member 2 is restricted by the spring 4 in its swinging move ment and keeps its axial orientation even under stress. In other words, the locking member 2 cannot rotate about a transverse axis as the ball of a conventional device would do.
  • the device of the invention consists of very simple components capable of being manufactured by mass production methods without difficulty.
  • the shell 1 is fastened to the plug 13 by pressure applied as indicated by arrows 16-47.
  • a fastener having a tubular shell formed with an elongated cavity longitudinally tapering toward an open end, a locking member in the cavity, and yieldably resilient means biasing the locking member toward said open end for wedging engagement with the inner wall of said shell
  • the improvement of the locking member comprising an arcuate face of said locking member being formed with a recess therein, said face being exposed in said open end of the cavity during said engagement of the locking member with said inner wall andhaving a portion facing the inner wall for clamping an element thereagainst, and said locking member further having a rearwardly tapering end portion opposite said exposed face and positioned inside said resilient means.
  • said locking member being drop shaped, said face thereof being substantially hemispherical, and said locking member conically tapering inward of said cavity from said hemispherical face.
  • said yieldably 3 resilient means including a helical spring interposed between the other end of said cavity and said locking member, said conically tapering portion of said locking member being received in said spring.
  • said cavity 5 having a throat portion and flaring longitudinally from said throat portion in opposite directions, said throat portion and a terminal portion of said cavity adjacent the other end of said shell being substantially cylindrical, and a plug pin partly received in said terminal portion in sealing engagement, said pin being formed With a recess open toward said cavity, said yieldably resilient means including a spring partly received in the recess of said plug pin and engaging said locking member.

Description

A ril 2, 1968 R. ANZINI 3,3
MECHANICAL WIRE JOINT Filed Sept. 23, 1965 INVENTOR RENATo AMZINI 3,376,545 MECHANICAL WIRE JOINT Renato Anzini, Losone, Switzerland Filed Sept. 23, 1965, Ser. No. 489,663 Claims priority, application Switzerland, Oct. 12, 1964, 13,239/64; May 8, 1965, 6,522/ 65 4 Claims. (Cl. 339-473) ABSTRACT OF THE DISCLOSURE A fastener for wires and the like having a tubular shell whose cavity is open in one direction and tapers toward the open end, and a locking member wedgedly engaging the tapering wall of the cavity under the restraint of a spring which biases the locking member in an outward direction. A recess in the exposed surface of the locking member permits a pointed tool securely to engage the member for depressing the same against the spring to permit insertion of a wire or release of a clamped wire. The preferred locking member is drop shaped having a hemispherical outer portion and a tapering inner portion.
Devices for instantaneously fastening electrical conductors without the use of screws are already known in the art. In particular there are known unipolar electric plugs having an outwardly tapering conical cavity adapted to receive the end of the wire or conductor to be fixed, a ball, which is acted upon by a spring, being accommodated in said cavity.
By slightly compressing the spring it is possible to insert the wire between the ball and the inner wall of the cavity, said wire being clamped by the ball against the cavity wall when the wire is subjected to traction. It is an inherent shortcoming of all these conventional devices that the conductor or wire cannot be removed unless the ball is compressed by means of another pointed tool which, in its turn, is caught within the cavity.
A further inconvenience of the conventional devices consists in that contact between the ball and the conductor is limited to practically one point only.
The present invention provides a device which avoids the above mentioned difficulties and is also usable as a mechanical joint. It has a tubular shell whose cavity tapers toward an open end normally closed by a movable locking member under the urging of a resilient element. A recess in an outward face of the locking member is adapted to receive a pointed tool for releasing a wire, cable or the like that is clamped between the surface of the locking member and the inner wall of the shell.
The locking member preferably is drop-shaped, an essentially semi-spherical portion being directed outward, and an essentially conical portion being directed inward and partly surrounded by a spring which pushes the looking member into its closing position. The semi-spherical portion of the member is formed with a central recess for receiving a pointed tool.
The invention will be better understood as preferred embodiments of the same will now be described with reference to the accompanying drawing in which:
FIG. 1 shows another unipolar electric plug in an axially sectional view.
FIG. 2 illustrates an element of the plug shown in FIG. 1 in elevation.
FIG. 3 is a plan view of said element.
The plug has a brass shell 1 of cylindrical form whose cavity 5 has a cylindrical lower portion (El-F), an intermediate conically tapering portion (FH), a cylindrical throat (HI) and finally an outwardly open, conically flaring portion (IL).
The lower cylindrical portion (EF) is seated by a States Patent 0 press fit on the cup shaped end 13' of the plug pin 13 which accommodates the lower end of a tapering helical spring 4 the upper end of which coaxially engages a conical inner portion CDA (FIG. 2) of a drop-shaped locking member 2 having an .outer semi-spherical portion A-B-C.
The semi-spherical portion A-B-C is provided with a central recess 2'.
The plug is operated as follows:
When a fairly rigid copper wire is to be inserted into the plug, it will sufiice to push said Wire into the flaring end portion I-L of the cavity 5 in the direction of the arrow 15. The locking member 2 is moved downward against the restraint of the spring 4. The wire is then strongly held between the semi-spherical surface of the member 2 and the inner wall H-F of the body 1.
The wire is released by inserting a pointed tool (a needle, a nail or the like) into the recess 2 of the member 2 and pushing the same against the action of the spring 4. The wire is free for removal.
A wire or cable which is not sufliciently rigid for overcoming the spring 4 is inserted after displacement of the member 2 by means of a pointed tool. When the pressure on the member 2 is released, the wire is strongly held between the member 2 and the body 1.
Only the recess 2 permits a pointed tool to be used for overcoming the action of the spring 4, whereby any type of wire or conductor may be introduced.
When, in the conventional devices, one tries to overcome the action of the spring by applying a pointed tool to a spherical locking member, the spherical member merely turns. Should one succeed in pressing it inward, the pointed tool is caught in the plug.
The conical portion of the drop-shaped locking member 2 is restricted by the spring 4 in its swinging move ment and keeps its axial orientation even under stress. In other words, the locking member 2 cannot rotate about a transverse axis as the ball of a conventional device would do.
The device of the invention consists of very simple components capable of being manufactured by mass production methods without difficulty.
The shell 1 is fastened to the plug 13 by pressure applied as indicated by arrows 16-47.
While the invention has been described with reference to an embodiment, it is not limited to the specific form shown, since changes and modifications may be made in the structure as well as in the material without departing from the spirit and the scope of the invention as defined in the appended claims.
What is claimed is:
1. In a fastener having a tubular shell formed with an elongated cavity longitudinally tapering toward an open end, a locking member in the cavity, and yieldably resilient means biasing the locking member toward said open end for wedging engagement with the inner wall of said shell, the improvement of the locking member comprising an arcuate face of said locking member being formed with a recess therein, said face being exposed in said open end of the cavity during said engagement of the locking member with said inner wall andhaving a portion facing the inner wall for clamping an element thereagainst, and said locking member further having a rearwardly tapering end portion opposite said exposed face and positioned inside said resilient means.
2. In a fastener as set forth in claim 1, said locking member being drop shaped, said face thereof being substantially hemispherical, and said locking member conically tapering inward of said cavity from said hemispherical face.
3. In a fastener as set forth in claim 2, said yieldably 3 resilient means including a helical spring interposed between the other end of said cavity and said locking member, said conically tapering portion of said locking member being received in said spring.
4. In a fastener as set forth in claim 2, said cavity 5 having a throat portion and flaring longitudinally from said throat portion in opposite directions, said throat portion and a terminal portion of said cavity adjacent the other end of said shell being substantially cylindrical, and a plug pin partly received in said terminal portion in sealing engagement, said pin being formed With a recess open toward said cavity, said yieldably resilient means including a spring partly received in the recess of said plug pin and engaging said locking member.
4 References Cited UNITED STATES PATENTS 1,061,330 5/1913 Self. 2,524,649 10/1950 Buhler 24-26 X 2,770,794 11/1956 Hofmann.
FOREIGN PATENTS 397,935 9/1933 Great Britain.
504,915 5/1939 Great Britain.
622,525 6/ 1961 Italy.
307,114 7/ 1955 Switzerland.
BERNARD A. GELAK, Primary Examiner.
US489663A 1964-10-12 1965-09-23 Mechanical wire joint Expired - Lifetime US3376545A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1323964A CH403912A (en) 1964-10-12 1964-10-12 Device for fastening or instant connection, without the use of screws, of electrical conductors, wires, cables and cords
CH652265A CH422097A (en) 1964-10-12 1965-05-08 Device for fastening or instantaneous connection, without the use of screws, of electrical conductors, wires, cables and ropes

Publications (1)

Publication Number Publication Date
US3376545A true US3376545A (en) 1968-04-02

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Application Number Title Priority Date Filing Date
US489663A Expired - Lifetime US3376545A (en) 1964-10-12 1965-09-23 Mechanical wire joint

Country Status (10)

Country Link
US (1) US3376545A (en)
AT (1) AT263108B (en)
CH (1) CH422097A (en)
DK (1) DK115932B (en)
ES (1) ES318226A1 (en)
FI (1) FI43749B (en)
FR (1) FR1449333A (en)
GB (1) GB1064084A (en)
NL (1) NL147589B (en)
NO (1) NO116920B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512122A (en) * 1968-02-19 1970-05-12 Richard J Hughes Test connector for electrical equipment
US3604876A (en) * 1968-12-23 1971-09-14 Max Pasbrig Electrical contact device
US3628221A (en) * 1968-05-02 1971-12-21 Max Pasbrig Device for clamping and tightening cables and the like
CN104577402A (en) * 2015-01-22 2015-04-29 中山市英利莱电气科技有限公司 Electrical connection self-locking terminal

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4240919C2 (en) * 1991-12-09 1997-05-15 Instron Corp Gripping device
GB2348920A (en) * 1999-04-15 2000-10-18 Robert Christopher Walton Shoe lace clamp fastener
EP3257124B1 (en) 2015-02-13 2021-10-13 Wire-Holder Kft Cable pulling device
CN109193185A (en) * 2018-08-13 2019-01-11 郑州泰恩科技有限公司 A kind of convenient electrical wire interface and motor protecter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061330A (en) * 1912-06-07 1913-05-13 George L Self Twine-holder.
GB397935A (en) * 1933-01-20 1933-09-07 James Morrison Brown Improvements in plug and socket connectors, ceiling roses and like electric fittings
GB504915A (en) * 1937-07-31 1939-05-01 David Wallis Improvements relating to wire gripping devices, particularly for use in electrical connectors, wire fencing equipment, wiring machines, and the like
US2524649A (en) * 1945-06-08 1950-10-03 Buhler Heinrich Wire clamp
CH307114A (en) * 1952-11-18 1955-05-15 Mouttet Leon Connection terminal for electrical conductor.
US2770794A (en) * 1949-03-30 1956-11-13 Hofmann Erich Electrical connecting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1061330A (en) * 1912-06-07 1913-05-13 George L Self Twine-holder.
GB397935A (en) * 1933-01-20 1933-09-07 James Morrison Brown Improvements in plug and socket connectors, ceiling roses and like electric fittings
GB504915A (en) * 1937-07-31 1939-05-01 David Wallis Improvements relating to wire gripping devices, particularly for use in electrical connectors, wire fencing equipment, wiring machines, and the like
US2524649A (en) * 1945-06-08 1950-10-03 Buhler Heinrich Wire clamp
US2770794A (en) * 1949-03-30 1956-11-13 Hofmann Erich Electrical connecting device
CH307114A (en) * 1952-11-18 1955-05-15 Mouttet Leon Connection terminal for electrical conductor.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512122A (en) * 1968-02-19 1970-05-12 Richard J Hughes Test connector for electrical equipment
US3628221A (en) * 1968-05-02 1971-12-21 Max Pasbrig Device for clamping and tightening cables and the like
US3604876A (en) * 1968-12-23 1971-09-14 Max Pasbrig Electrical contact device
CN104577402A (en) * 2015-01-22 2015-04-29 中山市英利莱电气科技有限公司 Electrical connection self-locking terminal

Also Published As

Publication number Publication date
FI43749B (en) 1971-03-01
DK115932B (en) 1969-11-24
GB1064084A (en) 1967-04-05
NO116920B (en) 1969-06-09
NL6512479A (en) 1966-04-13
CH422097A (en) 1966-10-15
AT263108B (en) 1968-07-10
FR1449333A (en) 1966-08-12
ES318226A1 (en) 1966-04-16
NL147589B (en) 1975-10-15

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