US2572940A - Wire grip indicating means - Google Patents

Wire grip indicating means Download PDF

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Publication number
US2572940A
US2572940A US13832550A US2572940A US 2572940 A US2572940 A US 2572940A US 13832550 A US13832550 A US 13832550A US 2572940 A US2572940 A US 2572940A
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US
Grant status
Grant
Patent type
Prior art keywords
wire
end
capsule
jaws
shell
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
Inventor
Roy R Lockhart
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.)
Reliable Electric Co
Original Assignee
Reliable Electric Co
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
Grant date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/08Fastenings for securing ends of driving-cables to one another, the fastenings having approximately the same diameter as the cables
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/04Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps
    • F16G11/044Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord
    • F16G11/048Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes with wedging action, e.g. friction clamps friction clamps deforming the cable, wire, rope or cord by moving a surface into the cable
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49764Method of mechanical manufacture with testing or indicating
    • Y10T29/49778Method of mechanical manufacture with testing or indicating with aligning, guiding, or instruction
    • Y10T29/4978Assisting assembly or disassembly
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/57Distinct end coupler
    • Y10T403/5721Single actuator for plural connections
    • Y10T403/5726Axially biased end portions
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/57Distinct end coupler
    • Y10T403/5793Distinct end coupler including member wedging or camming means
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/70Interfitted members
    • Y10T403/7047Radially interposed shim or bushing
    • Y10T403/7051Wedging or camming
    • Y10T403/7052Engaged by axial movement
    • Y10T403/7054Plural, circumferentially related shims between members

Description

Oct. 30, 1951 R. R. LOCKHART WIRE GRIP INDICATING MEANS Filed Jan. l5, 1950 Patented Oct. 30, 1951 WIRE GRIP INDICATIN G MEANS Roy R. Lockhart, Flintridge, Calif., assigner to Reliable Electric Company, Chicago, Ill., a corporation of Illinois Application January 13, 1950, Serial No. 138,325

4 Claims. 1

My invention covers an arrangementl that is used with a tubular type wire grip to provide a visual indication showing when a proper relationship has been established between the wire grip and an inserted wire end.

The wire grip for which my invention is particularly adapted is of the general type shown in U. S. Letters Patent 2,138,913 and 2,288,133. 'Ihese grips have wire gripping jaws that cooperate with a tapering tubular shell to produce wire gripping action.

Heretofore, wire grips of this type have occasionally failed due to the fact that the wire end was not threaded a suicient distance into the grip. Under that circumstance, the full effective length of the gripping jaws is not utilized. Also, an out-of-lay strand sometimes enters one of the spaces between adjacent jaws with the result that proper gripping action does not occur. Similarly, burrs at the conductor end produce an improper relationship. These last mentioned dilhculties would be eliminated if the Wire end were threaded completely through, and perhaps beyond, the gripping jaws.

Faulty connections as above described will withstand some tension, and thereby make a careless user think that a proper connection has been established. However, such a connection is quite likely to fail under service conditions.

Accordingly, the object of my invention is to provide an arrangement whereby a visual indication is produced when, and only when, the wire end has been passed completely through and beyond the gripping jaws. With such an arrangement, effective utilization of the entire length of the gripping jaws is insured. Similarly, the` difficulties produced by out-of-lay strands and burrs are eiectively eliminated.

My novel indicator arrangement is illustrated and described as embodied in a line splice of the general type shown in said U. S. Patent, 2,138,913. It may, however, equally well be used in other wire gripping devices.

Other objects and advantages of my invention will be apparent as the description proceeds, reference being had to the accompanying drawing which illustrates one structural form of the invention. It will be understood, of course, that in a practical, commercial application of the invention, the essential features are necessarily susceptible of changes in details and structural arrangements. The legal scope of the invention is to be measured by the claims hereinafter set forth.

In the drawing:

Fig. 1 is a sectional view showing a wire splice embodying my invention;

Fig. 2 is a sectional view on line 2-2 of Fig. 1, and

Fig. 3 is a sectional view on line 3-3 of Fig. 1.

The illustrated line splice has a tubular shell 5 that tapers toward both ends as shown at 6. Each end terminates in an increased tapering portion l.

Shell 5 is divided into two half portions by a central barrier which may take the form of a transverse disk 8 held in position by upsets 9 punched from the shell.

Each shell end contains a plurality of tapered gripping jaws I0, there being three jaws in each end of the splice illustrated (Fig. 2). Jaws I0 are interconnected by means of a jaw positioning ring Il that has spaced radial slots (not shown). Each jaw has a reduced neck portion l 2 that is received in one of such slots. This arrangement permits the jaws to float radially a distance depending on the longitudinal position of the jaws within the tapered shell. Also, the ring maintains the jaws in proper circumferentially spaced relation so that no bunching occurs.

Jaws ID are biased toward the tapered end of shell 5 by means of a partially compressed spiral spring l5. One end of spring I5 bears against central disk 8 while the other end is received within a cup I6 which engages heads l1 of the gripping jaws. Cup 2| has a central opening in its bottom that registers with the opening in jaw positioning ring Il.

A fragile capsule 20 is disposed on each side of central disk 8. Capsule 20 conveniently may be mounted on the surface of disk 8 by means of a suitable adhesive, although other mounting arrangements may be employed. Capsule 20 preferably takes the form of a gelatin tube sealed at both ends.

Each capsule 20 contains a liquid material 2| (Fig. 3) that has suicient coloring and body so as to be readily visible when the capsule is broken and the material flows to the exterior of the splice.

Capsule 20 extends, as shown in Fig. 3, diametrically across a substantial portion of the shell interior. The dimensions of capsule 20 are so chosen that it is impossible to abut the end of an inserted wire against disk 8 without rst rupturing the capsule.

Shell 5 has a plurality of circumferentialltr spaced holes 23 around each capsule so as to provide outlets for the liquid material when the capsules are ruptured.

A wire 25, illustrated as a stranded conductor, is appliedto the wire grip in the usual manner. The wire end is threaded into the shell where it pushes jaws l0 against the action of bias spring I5. Jaws I0 radially expand as they recede down the taper to permit passage of the wire end. When the wire has been inserted a sufficient, safe distance, its end ruptures capsule 20 as illustrated in the right hand portion of the splice of Fig. 1. The liquid material flows from capsule 20 and at least a portion of it escapes as shown at 26 to the exterior of the splice. This visual indication informs the user that the wire end has passed completely through and beyond jaws I0, and that thereby a proper relation between the wire and the grip has been established.

From the above description it is thought that the construction and advantages of my invention will be readily apparent to those skilled in the art. Various changes and modifications may be Vmade without departing from the spirit or losing the advantages of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a wire splice having a tubular shell tapering toward each end and wire gripping jaws in each end, the combination therewith of a transverse central barrier xed within said shell, a fragile capsule carried on each side of said barrier and extending diametrically across a substantial portion of the shell interior, a colored liquid material sealed within each capsule, the said shell having a plurality of circumferentially spaced holes around each capsule whereby said material, when a capsule is ruptured by an 4 inserted wire end, may escape to the shell exterior to provide a visual indication.

2. In a wire grip having a tubular tapered 4 shell and Wire gripping jaws therein, the combination therewith of means providing a visual indication when the end of an inserted wire has passed through and beyond said jaws, said means comprising a fragile capsule disposed with in said shell beyond said jaws and extending diametrically across a substantial portion of the shell interior, and a colored liquid material sealed Within said capsule, the said shell having a plurality of circumferentially spaced holes around said capsule whereby said material, when said capsule is ruptured by an inserted wire end, may escape to the shell exterior.

3. In a wire grip wherein it is necessary that a wire end be inserted a predetermined distance in order to insure satisfactory gripping action, the combination therewith of a fragile capsule disposed within said grip, and a colored liquid material sealed within said capsule, the wire grip having openings leading from the interior to the exterior thereof for the escape of said material when said capsule is ruptured by an inserted Wire end.

4. A visual signal for indicating the proper degree of insertion of a wire in a wire grip comprising a fragile container, colored liquid material within said container, and means producing rupture of said container upon proper degree of wire insertion, the wire grip having apertures enabling said material to ow to a visible portion of the grip.

ROY R. LOCKHART.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

US2572940A 1950-01-13 1950-01-13 Wire grip indicating means Expired - Lifetime US2572940A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646016A (en) * 1951-05-24 1953-07-21 Wilson Loyal Vern Vehicle collision indicator
US2648833A (en) * 1951-04-05 1953-08-11 Winfred E Wilson Means for measuring tension in bolts
US2674221A (en) * 1953-06-24 1954-04-06 Tilt or inversion indicator
US2893345A (en) * 1958-05-19 1959-07-07 Harry E Kaufman Indicating means for use with plastering
US3113553A (en) * 1961-07-24 1963-12-10 Ideal Ind Connector with indicator
US3137268A (en) * 1962-05-23 1964-06-16 Clive H Bramson Warning device
US3948141A (en) * 1974-08-20 1976-04-06 Katsumi Shinjo Load indicating washer
US4037516A (en) * 1975-10-24 1977-07-26 Hart Mark M Safety device and method
US4670950A (en) * 1985-05-13 1987-06-09 Monarch Marking Systems, Inc. Theft-deterrent tag
US4777901A (en) * 1986-01-28 1988-10-18 Marsden Wayne M Security marking fluid device
US6206736B1 (en) 1999-10-26 2001-03-27 Hubbell Incorporated Electrical conductor splicing assembly having spring with opposite end portions captured by and interconnecting conductor gripping members
US20070017689A1 (en) * 2005-07-22 2007-01-25 Mario Polidori Cable connector
US20090298358A1 (en) * 2008-05-30 2009-12-03 Hubbell Incorporated. Corrosion Resistant automatic splice
US20120217062A1 (en) * 2011-02-24 2012-08-30 Thomas & Betts International, Inc. Automatic Splice with Integral Center Stop
US20130230350A1 (en) * 2010-11-04 2013-09-05 Roc Co., Ltd. Reinforcement bar coupler
US9240655B2 (en) 2013-03-15 2016-01-19 Hubbell Incorporated Automatic splice having a magnetic indicator
US9450316B2 (en) 2014-07-02 2016-09-20 Hubbell Incorporated Automatic cable splice
US9490577B2 (en) 2013-03-15 2016-11-08 Hubbell Incorporated Automatic splice having an arm indicator
US9502791B2 (en) 2013-10-23 2016-11-22 Hubbell Incorporated Automatic cable splice
US9768523B1 (en) 2017-01-04 2017-09-19 Stanislaw L Zukowski In-line twist on electrical wire connector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US649542A (en) * 1900-02-21 1900-05-15 Theodore Nieman Wire-coupling.
US698127A (en) * 1901-06-12 1902-04-22 James M Glenn Wire-coupling.
US1854783A (en) * 1929-05-16 1932-04-19 Gen Cable Corp Stranded wire connecter
US2460215A (en) * 1946-07-08 1949-01-25 Kenneth J Chase Telltale for frozen food packages

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US649542A (en) * 1900-02-21 1900-05-15 Theodore Nieman Wire-coupling.
US698127A (en) * 1901-06-12 1902-04-22 James M Glenn Wire-coupling.
US1854783A (en) * 1929-05-16 1932-04-19 Gen Cable Corp Stranded wire connecter
US2460215A (en) * 1946-07-08 1949-01-25 Kenneth J Chase Telltale for frozen food packages

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648833A (en) * 1951-04-05 1953-08-11 Winfred E Wilson Means for measuring tension in bolts
US2646016A (en) * 1951-05-24 1953-07-21 Wilson Loyal Vern Vehicle collision indicator
US2674221A (en) * 1953-06-24 1954-04-06 Tilt or inversion indicator
US2893345A (en) * 1958-05-19 1959-07-07 Harry E Kaufman Indicating means for use with plastering
US3113553A (en) * 1961-07-24 1963-12-10 Ideal Ind Connector with indicator
US3137268A (en) * 1962-05-23 1964-06-16 Clive H Bramson Warning device
US3948141A (en) * 1974-08-20 1976-04-06 Katsumi Shinjo Load indicating washer
US4037516A (en) * 1975-10-24 1977-07-26 Hart Mark M Safety device and method
US4670950A (en) * 1985-05-13 1987-06-09 Monarch Marking Systems, Inc. Theft-deterrent tag
US4777901A (en) * 1986-01-28 1988-10-18 Marsden Wayne M Security marking fluid device
US6206736B1 (en) 1999-10-26 2001-03-27 Hubbell Incorporated Electrical conductor splicing assembly having spring with opposite end portions captured by and interconnecting conductor gripping members
US7304243B2 (en) * 2005-07-22 2007-12-04 Connector Products, Inc. Cable connector
US20070017689A1 (en) * 2005-07-22 2007-01-25 Mario Polidori Cable connector
US20090298358A1 (en) * 2008-05-30 2009-12-03 Hubbell Incorporated. Corrosion Resistant automatic splice
US7799996B2 (en) * 2008-05-30 2010-09-21 Hubbell Incorporated Corrosion resistant automatic splice
US20130230350A1 (en) * 2010-11-04 2013-09-05 Roc Co., Ltd. Reinforcement bar coupler
US20120217062A1 (en) * 2011-02-24 2012-08-30 Thomas & Betts International, Inc. Automatic Splice with Integral Center Stop
US9240655B2 (en) 2013-03-15 2016-01-19 Hubbell Incorporated Automatic splice having a magnetic indicator
US9490577B2 (en) 2013-03-15 2016-11-08 Hubbell Incorporated Automatic splice having an arm indicator
US9502791B2 (en) 2013-10-23 2016-11-22 Hubbell Incorporated Automatic cable splice
US9450316B2 (en) 2014-07-02 2016-09-20 Hubbell Incorporated Automatic cable splice
US9768523B1 (en) 2017-01-04 2017-09-19 Stanislaw L Zukowski In-line twist on electrical wire connector

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