US3763426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing twisted pair wire to locate electrical insulation faults or measure twist or wire runout or sense breaks in the conductors
Assignee: Hipotronics Inc
•
Filing: 1972-03-07
•
Granted: 1973-10-02
•
Expires: 1992-03-07
Abstract
Abstract A twisted pair of individually insulated wires is rapidly and reliably tested for electrical faults in a testing apparatus which separates the twisted pair of wires for continuous testing of the individual wires as a length of the twisted pair wire is drawn through the testing apparatus. The testing apparatus comprises a support member providing a passage along a feed axis for said twisted pair and an electrode unit mounted in the support member for free rotation about said axis. The electrode unit includes a separating member lying on said axis and arranged to fit between the twisted pair of wires to follow the twist of said twisted pair as it is fed along said axis so as to continuously remain between the twisted pair of wires and permit continuous separate testing of the individual wires. Electrode units of several different configurations are usable: In one electrode unit, the separating member fitting between the twisted pair of wires comprises an insulating sheet and conductive members on each side of the sheet for contacting the individual wires of the twisted pair. In other electrode units, the separating member fitting between the twisted pair of wires is designed to release when a kink or knot occurs in the wire, and in still other electrode units, the separating member fitting between the wires may be a solid conductor or a solid insulator with other electrode portions lying adjacent the individual wires. In each such testing apparatus, means are provided for making electrical contact with the electrode unit as it rotates, to enable connection to an indicating or control circuit. By means of such testing apparatus, twisted pair wire may be tested for pinholes, bare wire, and coincidence faults. By including means sensitive to rotation of the electrode unit, the detection of wire runout is achieved. In one testing system, two such testing apparatuses are axially separated on the same twisted pair wire, to detect open circuits in the wires by measuring capacitance in the length of wire between the two electrode units, and to measure the amount of twist per unit length of wire by measuring the phase angle between the two rotating electrode units in relation to their axial separation.
Inventors
- 👤 R Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; G01R31/59
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
171 words
The method of testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering comprising the steps of: feeding said previously twisted pair of wires along an axis through a testing station, positioning a member between the wires of the previously twisted pair, rotatably mounting said member for free rotation about said axis so as to allow said member to follow the twists of said previously twisted pair of wires passing through said station, holding the freely rotatable member in the station continuously between the wires of the previously twisted pair as they are fed through said testing station to cause said member to be rotated by the passage of said previously twisted pair for individual testing thereof, and sensing a selected electrical characteristic of portions of the twisted pair of wires as they are fed along said axis past said rotating member as it is being rotated by the passage of said previously twisted pair of wires.
Claim 2
Independent Claim
171 words
The method of testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering comprising the steps of: feeding said previously twisted pair of wires along an axis through a testing station, positioning a member between the wires of the previously twisted pair, rotatably mounting said member for free rotation about said axis so as to allow said member to follow the twists of said previously twisted pair of wires passing through said station, holding the freely rotatable member in the station continuously between the wires of the previously twisted pair as they are fed through said testing station to cause said member to be rotated by the passage of said previously twisted pair for individual testing thereof, and sensing a selected electrical characteristic of portions of the twisted pair of wires as they are fed along said axis past said rotating member as it is being rotated by the passage of said previously twisted pair of wires.
Claim 3
Dependent Claim
89 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering as claimed in claim 1, including the steps of: electrically grounding both of the conductive cores, and, applying a high voltage test potential to said member while it is rotating for applying said high voltage test potential to the insulation coverings of each wire for sensing faults in the insulation covering of each of the wires of said previously twisted pair.
Claim 4
Dependent Claim
65 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering as claimed in claim 1, including the steps of: sensing the rotary motion of said member, and providing an indication when said rotary motion stops to indicate runout or breakage in the previously twisted pair of wires.
Claim 5
Dependent Claim
71 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering as claimed in claim 1, including the steps of: sensing the number of twists in the pair of twisted wires per unit length, and counting the number of rotations of said member for determining the number of units of length of said pair.
Claim 6
Independent Claim
231 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering comprising the steps of: feeding said previously twisted pair of wires along an axis through a testing station, positioning a freely rotatable member between the wires of the previously twisted pair so as to freely rotate about said axis, said freely rotatable member including a pair of laterally spaced conductive electrodes separated by an insulator, holding the freely rotatable member in the station continuously between the wires of the twisted pair as they are fed through said testing station to follow the twist of said previously twisted pair for individual testing thereof, electrically gounding the conductive cores of both wires, positioning said rotatable member with one of said conductive electrodes adjacent to the insulation covering on one wire of the twisted pair and with the other of said conductive electrodes adjacent to the insulation covering on the other wire of the twisted pair, applying a high voltage test potential to each of said electrodes while said member is rotating for applying the high voltage test potential individually to the insulation coverings, and sensing the flow of current between sAid high voltage test potential and either of said electrodes for individually indicating flaws in the insulation covering of either wire of the twisted pair.
Claim 7
Independent Claim
231 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering comprising the steps of: feeding said previously twisted pair of wires along an axis through a testing station, positioning a freely rotatable member between the wires of the previously twisted pair so as to freely rotate about said axis, said freely rotatable member including a pair of laterally spaced conductive electrodes separated by an insulator, holding the freely rotatable member in the station continuously between the wires of the twisted pair as they are fed through said testing station to follow the twist of said previously twisted pair for individual testing thereof, electrically gounding the conductive cores of both wires, positioning said rotatable member with one of said conductive electrodes adjacent to the insulation covering on one wire of the twisted pair and with the other of said conductive electrodes adjacent to the insulation covering on the other wire of the twisted pair, applying a high voltage test potential to each of said electrodes while said member is rotating for applying the high voltage test potential individually to the insulation coverings, and sensing the flow of current between sAid high voltage test potential and either of said electrodes for individually indicating flaws in the insulation covering of either wire of the twisted pair.
Claim 8
Dependent Claim
69 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering, as claimed in claim 5, including the steps of: sensing the simultaneous flow of current between said high voltage test potential and both of said electrodes for detecting coincidence faults in the insulation coverings on both wires of the twisted pair.
Claim 9
Dependent Claim
82 words
The method for individually testing the electrical characteristics of a length of previously twisted pair of wires each including an electrically conductive core covered by an insulation covering, as claimed in claim 5 in which: said flow of current is sensed by providing for the emission of light when current flow occurs and the indicating of flaws is provided by a remote response to such light, whereby the step of indicating flaws is isolated from the high voltage test potential being applied.
Claim 10
Independent Claim
147 words
The method for individually testing the electrical characteristics of a length of twisted pair of wires each including an electrically conductive core covered by an insulating covering, comprising the steps of: feeding said twisted pair of wires along an axis through first and second testing stations which are spaced along said axis, positioning first and second freely rotatable members in said respective stations between the wires of the twisted pair so said first and second members can freely rotate about said axis, holding said first and second freely rotatable members in said respective stations continuously between the wires of the twisted pair as they are fed through said stations in sequence to allow each of said members to follow the twist of said twisted pair, and sensing the characteristics of the section of the twisted pair of wires extending between said first and second freely rotating members.
Claim 11
Independent Claim
147 words
The method for individually testing the electrical characteristics of a length of twisted pair of wires each including an electrically conductive core covered by an insulating covering, comprising the steps of: feeding said twisted pair of wires along an axis through first and second testing stations which are spaced along said axis, positioning first and second freely rotatable members in said respective stations between the wires of the twisted pair so said first and second members can freely rotate about said axis, holding said first and second freely rotatable members in said respective stations continuously between the wires of the twisted pair as they are fed through said stations in sequence to allow each of said members to follow the twist of said twisted pair, and sensing the characteristics of the section of the twisted pair of wires extending between said first and second freely rotating members.
Claim 12
Dependent Claim
81 words
The method for individually testing the electrical characteristics of a length of twisted pair of wires each including an electrically conductive core covered by an insulating covering, as claimed in claim 8, in which: the relative angular positions of said first and second freely rotatable members are sensed to determine the amount of twist per unit length, and the number of rotations of one of said members is counted to determine the number of units of length of said twisted pair.
Claim 13
Dependent Claim
177 words
The method for individually testing the electrical characteristics of a length of twisted pair of wires each including an electrically conductive core covered by an insulating covering, as claimed in claim 8, in which: each of said first and second freely rotatable members includes a pair of laterally spaced conductive electrodes separated by insulation, and including the steps of: positioning each of said rotatable members with a first of said conductive electrodes adjacent to the insulation covering on a first wire of the twisted pair in each station and with the second of said conductive electrodes adjacent to the insulation covering on the second wire of the twisted pair in each station, sensing the capacitance between each of said first electrodes and the conductive core of the first wire in series for detecting an open circuit in the conductive core of the first wire, and sensing the capacitance between each of said second electrodes and the conductive core of the second wire in series for detecting an open circuit in the conductive core of the second wire.
Claim 14
Dependent Claim
186 words
Apparatus for testing the electrical characteristics of a length of previously twisted pair wire wherein each wire has a conductive core with an insulation covering thereon comprising: rotatable means providing a path for the twisted pair wire to be moved along a feed axis; bearing means for said rotatable means enabling Said rotatable means to be freely rotatable about said feed axis, electrode means mounted in said rotatable means including a member extending across said axis adapted to have the wires of the twisted pair pass on opposite sides thereof, whereby said rotatable means can freely rotate to permit said member to follow the twist of the twisted pair wire, means for providing electrical connection from a testing circuit to said electrode means during rotation thereof for testing and characteristics of said twisted pair wire, and said means for providing electrical connection to said electrode means during rotation thereof including a connection from said electrode means to said bearing means and an external connection to said bearing means, whereby said bearing means completes a low friction electrical circuit from said electrode means to an external connection.
Claim 15
Dependent Claim
186 words
Apparatus for testing the electrical characteristics of a length of previously twisted pair wire wherein each wire has a conductive core with an insulation covering thereon comprising: rotatable means providing a path for the twisted pair wire to be moved along a feed axis; bearing means for said rotatable means enabling Said rotatable means to be freely rotatable about said feed axis, electrode means mounted in said rotatable means including a member extending across said axis adapted to have the wires of the twisted pair pass on opposite sides thereof, whereby said rotatable means can freely rotate to permit said member to follow the twist of the twisted pair wire, means for providing electrical connection from a testing circuit to said electrode means during rotation thereof for testing and characteristics of said twisted pair wire, and said means for providing electrical connection to said electrode means during rotation thereof including a connection from said electrode means to said bearing means and an external connection to said bearing means, whereby said bearing means completes a low friction electrical circuit from said electrode means to an external connection.
Claim 16
Dependent Claim
206 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, comprising: rotatable means providing a path for the twisted pair wire to be moved along a feed axis; bearing means for said rotatable means enabling said rotatable means to be freely rotatable about said feed axis, electrode means mounted in said rotatable means including a member extending across said axis adapted to have the wires of the twisted pair pass on opposite sides thereof, whereby said rotatable means can freely rotate to permit said member to follow the twist of the twisted pair wire, means for providing electrical connection to said electrode means during rotation thereof for testing the characteristics of said twisted pair wire, said electrode means including an insulating member extending across said axis with a pair of conductive electrodes positioned on oppsoite sides of said insulating member, one of said electrodes being positioned for engaging the insulation covering on one wire and the other of said electrodes being positioned for engaging the insulation covering on the other wire, and said means for providing electrical connection to said electrode means including individual circuit connections to each of said electrodes.
Claim 17
Dependent Claim
206 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, comprising: rotatable means providing a path for the twisted pair wire to be moved along a feed axis; bearing means for said rotatable means enabling said rotatable means to be freely rotatable about said feed axis, electrode means mounted in said rotatable means including a member extending across said axis adapted to have the wires of the twisted pair pass on opposite sides thereof, whereby said rotatable means can freely rotate to permit said member to follow the twist of the twisted pair wire, means for providing electrical connection to said electrode means during rotation thereof for testing the characteristics of said twisted pair wire, said electrode means including an insulating member extending across said axis with a pair of conductive electrodes positioned on oppsoite sides of said insulating member, one of said electrodes being positioned for engaging the insulation covering on one wire and the other of said electrodes being positioned for engaging the insulation covering on the other wire, and said means for providing electrical connection to said electrode means including individual circuit connections to each of said electrodes.
Claim 18
Dependent Claim
116 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, as claimed in claim 12, in which: said bearing means include a pair of ball bearing units axially spaced for supporting said rotatable means, each of said ball bearing units including a stationery race and a rotatable race connected to said rotatable means with a plurality of balls between said races providing for free rotation of said rotatable means, and the individual circuit connections to said electrodes include connections from the respective electrodes to the respective rotatable races of said bearing units, with individual external connections to the respective stationery races.
Claim 19
Dependent Claim
46 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, as claimed in claim 12, in which: said conductive electrodes are rollers spaced outwardly from opposite sides of said insulating member.
Claim 20
Dependent Claim
87 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, as claimed in claim 12, in which: said conductive electrodes are adjacent to opposite sides of said insulating member, said conductive electrodes are formed of hardened material to resist wear, and said conductive electrodes have curved convex outer surfaces engaging th insulating covering on the respective wires for separating the twisted wire pair to pass on opposite sides of said electrode means.
Claim 21
Dependent Claim
65 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire Has a conductive core with an insulation covering thereon, as claimed in claim 15, in which: said conductive electrodes have grooves in their outer surfaces conforming to the insulation covering on the wires for increasing the extent of circumferential contact between the respective insulation coverings and the respective electrodes.
Claim 22
Dependent Claim
59 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, as claimed in claim 13, in which: said rotatable means extends outboard from both of said ball bearing units, and said electrode means is mounted in the outboard extending portion of said rotatable means.
Claim 23
Dependent Claim
73 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire wherein each wire has a conductive core with an insulation covering thereon, as claimed in claim 17, in which: said outboard portion of said rotatable means includes clearance openings on opposite sides of said electrode means for allowing relatively large knots or kinks in both wires of the twisted pair to pass simultaneously by opposite sides of said electrode means.
Claim 24
Independent Claim
239 words
A system for high voltage testing a previously twisted pair wire to test the insulation covering on the individual wire comprising: rotatable means defining a path for the twisted pair wire to be moved along a feed axis, bearing means supporting said rotatable means for free rotation thereof about said feed axis for said rotatable means to follow the twist of the twisted pair wire being moved along said feed axis, separating means mounted in said rotatable means and positioned on said axis adapted to have the individual wires of the twisted wire pair pass on opposite sides of said separating means, conductive electrode means in said rotatable means associated with said separating means for the insulation covering on the individual wire to pass adjacent to said electrode means, electrical connection means for making electrical connection from a high voltage source of test potential to said electrode means while the twisted pair wire is being moved along said feed axis during rotation of said rotatable means, said means for making electrical connection including light-emitting means for emitting light in response to the flow of current occurring when a fault in the insulation covering passes said electrode means, and fault indicating means including photocell means positioned remote from said light-emitting means and arranged to be responsive to the emissions of light therefrom, whereby said fault indicating means is isolated from the high voltage test potential in said electrical connection means.
Claim 25
Independent Claim
239 words
A system for high voltage testing a previously twisted pair wire to test the insulation covering on the individual wire comprising: rotatable means defining a path for the twisted pair wire to be moved along a feed axis, bearing means supporting said rotatable means for free rotation thereof about said feed axis for said rotatable means to follow the twist of the twisted pair wire being moved along said feed axis, separating means mounted in said rotatable means and positioned on said axis adapted to have the individual wires of the twisted wire pair pass on opposite sides of said separating means, conductive electrode means in said rotatable means associated with said separating means for the insulation covering on the individual wire to pass adjacent to said electrode means, electrical connection means for making electrical connection from a high voltage source of test potential to said electrode means while the twisted pair wire is being moved along said feed axis during rotation of said rotatable means, said means for making electrical connection including light-emitting means for emitting light in response to the flow of current occurring when a fault in the insulation covering passes said electrode means, and fault indicating means including photocell means positioned remote from said light-emitting means and arranged to be responsive to the emissions of light therefrom, whereby said fault indicating means is isolated from the high voltage test potential in said electrical connection means.
Claim 26
Dependent Claim
214 words
Apparatus for testing the electricl characteristics of twisted pair wire in which each wire of the twisted pair has a conductive core with an insulation covering thereon comprising: a support member defining a test station through which the twisted pair wire can be passed along a feed axis, bearing means mounted on said support member adapted for rotation about said axis, an electrode unit rotatably mounted by said bearing means in said support member for free rotation about said feed axis, said electrode unit including separating means lying on said axis and arranged to fit between the respective wires of the twisted pair and to freely rotate about said axis for said separating means to follow the twist of said twisted pair as it is fed through said testing apparatus, thereby to remain continuously between the twisted pair of wires for enabling separate individual testing thereof; means for making electrical connection with said electrode unit during rotation thereof, said separating means comprising a central insulating element and conductive members positioned on each side of said insulating element for said conductive members to engage the respective insulation coverings of the individual wires of said twisted pair, And said means for making electrical connection including means for making a connection to each of said conductive members.
Claim 27
Dependent Claim
214 words
Apparatus for testing the electricl characteristics of twisted pair wire in which each wire of the twisted pair has a conductive core with an insulation covering thereon comprising: a support member defining a test station through which the twisted pair wire can be passed along a feed axis, bearing means mounted on said support member adapted for rotation about said axis, an electrode unit rotatably mounted by said bearing means in said support member for free rotation about said feed axis, said electrode unit including separating means lying on said axis and arranged to fit between the respective wires of the twisted pair and to freely rotate about said axis for said separating means to follow the twist of said twisted pair as it is fed through said testing apparatus, thereby to remain continuously between the twisted pair of wires for enabling separate individual testing thereof; means for making electrical connection with said electrode unit during rotation thereof, said separating means comprising a central insulating element and conductive members positioned on each side of said insulating element for said conductive members to engage the respective insulation coverings of the individual wires of said twisted pair, And said means for making electrical connection including means for making a connection to each of said conductive members.
Claim 28
Dependent Claim
48 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 20 wherein said electrode unit comprises a tubular insulating member carrying said separating means, said tubular insulating member being concentric with said feed axis and rotating about said axis along with said separating means.
Claim 29
Dependent Claim
58 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 20 wherein said separating means comprises a central insulating element and conductive members on each side of said element for contacting the individual wires of said twisted pair, said conductive members having grooves receiving said individual wires for contacting an extended circumferential region thereof.
Claim 30
Dependent Claim
56 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 20 wherein said separating means comprises an insulating element and conductive members on each side of said element for contacting the individual wires of said twisted pair, said conductive members comprising tubes through which the individual wires of the twisted pair extend.
Claim 31
Dependent Claim
52 words
Apparatus for testing the electrical characteristics of a length of twisted pair wire as claimed in claim 20 wherein said separating means are arranged to release for moving out of position with respect to said feed axis whenever an obstruction such as a knot or kink is encountered in said twisted pair.
Claim 32
Dependent Claim
57 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 24 wherein said separating means are pivotally mounted in said rotatable electrode unit for pivotting from an operating position on said feed axis to a retracted position spaced away from said feed axis when contacted by an obstruction in said twisted pair wire.
Claim 33
Dependent Claim
44 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 24 wherein said separating means comprises material with a predetermined breaking strength extending across said axis and adapted for breaking when contacted by an obstruction in said twisted pair wire.
Claim 34
Dependent Claim
62 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 20 wherein said separating means comprises an insulating body adapted to be positioned between the respective wires of the twisted pair and wherein said pair of conductive members are spaced away from opposite sides of said insulating body in contact with the insulation coverings of said individual wires.
Claim 35
Dependent Claim
61 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in Claim 20, wherein said conductive members have a curved convex configuration for contacting the insulation coverings of the respective individual wires of said twisted pair for substantially separating the respective wires upstream from said insulating element for preventing any knot or kink from snagging on said insulating element.
Claim 36
Dependent Claim
76 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 2 wherein said separating means comprises a conductive body adapted to be positioned between the respective wires of the twisted pair and wherein said electrode unit further comprises a pair of conductive members spaced away from opposite sides of said conductive body in contact with the insulation coverings of said individual wires and located externally thereof with respect to said conductive body.
Claim 37
Dependent Claim
56 words
Apparatus for testing the electrical characteristics of twisted pair wire as claimed in claim 20 wherein said means for making electrical connection with said electrode unit during rotation thereof comprises conductive bearing means rotatably mounting said electrode unit, and means in said electrode unit for making electrical connection between said separating means and said bearing means.
Claim 38
Independent Claim
141 words
A system for testing the electrical characteristIcs of twisted pair wire wherein each wire of the twisted pair has a conductor therein with an insulation covering on the conductor, comprising: means for feeding the twisted pair wire along a feed axis through a testing station; testing apparatus in said testing station, said testing apparatus comprising a rotatable electrode unit including separating means arranged to fit between the respective wires of the twisted pair and to freely rotate about said feed axis, thereby to follow the twist of said twisted pair as it is fed through said testing station and to continuously remain between the respective wires of the twisted pair, and having electrode means for individual testing thereof; and means electrically coupled to said electrode means for indicating selected electrical characteristics of the twisted pair wire fed through said testing apparatus.
Claim 39
Independent Claim
141 words
A system for testing the electrical characteristIcs of twisted pair wire wherein each wire of the twisted pair has a conductor therein with an insulation covering on the conductor, comprising: means for feeding the twisted pair wire along a feed axis through a testing station; testing apparatus in said testing station, said testing apparatus comprising a rotatable electrode unit including separating means arranged to fit between the respective wires of the twisted pair and to freely rotate about said feed axis, thereby to follow the twist of said twisted pair as it is fed through said testing station and to continuously remain between the respective wires of the twisted pair, and having electrode means for individual testing thereof; and means electrically coupled to said electrode means for indicating selected electrical characteristics of the twisted pair wire fed through said testing apparatus.
Claim 40
Dependent Claim
65 words
A system for testing the electrical characteristics of twisted pair wire as claimed in claim 31 wherein said testing apparatus comprises a support member and bearing means for rotatably mounting said electrode unit, said electrode unit includes a tubular insulating member concentrically mounted with respect to said feed axis for rotation about said axis, and said separating means being carried by said tubular insulating member.
Claim 41
Dependent Claim
94 words
A system for testing the electrical characteristics of twisted pair wire as claimed in claim 31 further comprising a second testing apparatus axially spaced from the first testing apparatus and located in a second testing station and comprising a second rotatable electrode unit including second separating means arranged to fit between the respective wires of the twisted pair and to freely rotate about said feed axis, thereby to follow the twist of the twisted pair as it is fed past said separating means, said second testing apparatus being electrically coupled to said indicating means.
Claim 42
Dependent Claim
38 words
A system for testing the electrical characteristics of twisted pair wire as claimed in claim 33 wherein siad indicating means includes means for measuring the capacitance in the section of the individual wires between said two testing stations.
Claim 43
Dependent Claim
58 words
A system for testing the electrical characteristics of twisted pair wire as claimed in claim 33 further comprising means for varying the axial spacing between said first and second test apparatus, thereby to facilitate measurement of the rate of twist in said twisted pair by permitting said first and second separating means to be brought into parallel relationship.
Claim 44
Dependent Claim
55 words
A system for testing the electrical characteristics of twisted pair wire as claimed in claim 35 further comprising means for measuring the phase relationship of the rotation of said two separating means in relation to the axial distance by which they are spaced apart for measuring the rate of twist of said twisted pair wire.
References Cited (Backward Citations)
US887441A
Cited
DE760040C
Cited
DE914413C
Cited
US2635136A
Cited
US2942181A
Cited
US2994820A
Cited
US2980851A
Cited
US3096478A
Cited
US3277365A
Cited
US3628133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |