EP2157671A1 - Vorrichtung und Verfahren zur Nullstellung eines Prüfinstruments - Google Patents

Vorrichtung und Verfahren zur Nullstellung eines Prüfinstruments Download PDF

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Publication number
EP2157671A1
EP2157671A1 EP08162636A EP08162636A EP2157671A1 EP 2157671 A1 EP2157671 A1 EP 2157671A1 EP 08162636 A EP08162636 A EP 08162636A EP 08162636 A EP08162636 A EP 08162636A EP 2157671 A1 EP2157671 A1 EP 2157671A1
Authority
EP
European Patent Office
Prior art keywords
segment
bight
disposed
electrical conductor
grip
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.)
Withdrawn
Application number
EP08162636A
Other languages
English (en)
French (fr)
Inventor
Brian Stanley Aikins
Greg Edward Foisy
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.)
Fluke Corp
Original Assignee
Fluke Corp
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 Fluke Corp filed Critical Fluke Corp
Priority to EP08162636A priority Critical patent/EP2157671A1/de
Publication of EP2157671A1 publication Critical patent/EP2157671A1/de
Withdrawn legal-status Critical Current

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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
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/08—Short-circuiting members for bridging contacts in a counterpart
    • 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
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/652—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth pin, blade or socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
    • H01R13/7032—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity making use of a separate bridging element directly cooperating with the terminals

Definitions

  • the present disclosure relates to test instruments. More particularly, the present disclosure relates to the use of a zeroing apparatus to short together a plurality of leads.
  • a multimeter is an electronic measuring instrument that may combine in one unit a number of functions including the ability to measure voltage, current and resistance. Typically, a multimeter can perform these functions to a very high degree of accuracy. Accordingly, multimeters are typically used to diagnose or evaluate electrical devices such as batteries, motor controls, appliances, power supplies, and wiring systems.
  • a multimeter is typically calibrated or "zeroed" prior to making a measurement.
  • zeroing is typically performed by shorting together the distal ends of the leads, i.e., electrically coupling together those ends of the leads that are not plugged into the multimeter.
  • the distal ends of leads typically have many different arrangements.
  • conventional leads may be arranged with relatively independent distal ends that may include probe tips, alligator clips, sockets, or other lead ends.
  • the distal ends also may be relatively positioned in a fixed pattern, e.g., so as to mimic appliance and device plugs that get connected to a power source via a wall socket. Given that a large number of options are available for the arrangement of the distal ends, the potential for incompletely shorting together the distal ends is also large.
  • Figure 1 is a top view of an unloaded configuration of an apparatus for shorting together a plurality of leads according to an embodiment of the present disclosure.
  • Figure 2 is a front elevation view of the apparatus shown in Figure 1 .
  • Figure 3 is a side elevation view of the apparatus shown in Figure 1 .
  • Figure 4 is a first perspective view of the apparatus shown in Figure 1 .
  • Figures 5 is a second perspective view of the apparatus shown in Figure 1 .
  • Figures 6 is a top view illustrating a loaded configuration of the apparatus shown in Figure 1 .
  • Figures 7A-7C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a first mains cord.
  • Figures 8A-8C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a second mains cord.
  • Figures 9A-9C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a third mains cord.
  • Figures 10A-10C illustrate an intermediate configuration of the apparatus of shown in Figure 1 with respect to a fourth mains cord.
  • Figures 11A-11C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a fifth mains cord.
  • Figures 12A-12C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a sixth mains cord.
  • Figures 13A-13C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a seventh mains cord.
  • Figure 14 illustrates a method according to an embodiment of the present disclosure for shorting together the distal ends of the seventh mains cord shown in Figures 13A-13C .
  • Figure 15 illustrates a method according to an embodiment of the present disclosure for shorting together independent test probes the distal ends of test leads.
  • multimeters can be used to measure voltage, current, resistance, temperature, or other parameters.
  • Coupled can include various types of relationships between two or more components or features.
  • the phrase “electrically coupled” can include a path conductively linking two or more components or features or the phrase “mechanically coupled” may encompass a physical association or structural linking of two or more components or features.
  • several other embodiments of the disclosure can have configurations, components, features or procedures different than those described in this section. A person of ordinary skill in the art, therefore, will accordingly understand that the disclosure may have other embodiments with additional elements, or the disclosure may have other embodiments without several of the elements shown and described below with reference to Figures 1-15 .
  • Figures 1-5 show an apparatus 100 according to an embodiment of the present disclosure.
  • the apparatus 100 can short together a plurality of leads, for example, when zeroing a multimeter (not shown in Figures 1-5 ).
  • the apparatus 100 as shown in Figures 1-5 is in an "unloaded configuration," which is the nominal state following its manufacture.
  • the apparatus 100 can include an electrically conductive strip that extends between first and second ends 102a and 102b.
  • the apparatus 100 includes a first surface 104a and a second surface 104b that faces away from the first surface 104a.
  • the apparatus 100 further includes a first edge 106 that is spaced from a second edge 108.
  • the first and second edges 106 and 108 couple the first and second surfaces 104a and 104b and extend between the and second ends 102a and 102b.
  • the electrically conductive strip can include a beryllium copper alloy substrate that is plated with sulphamate nickel.
  • the electrically conductive strip can include a stainless steel alloy or any other material that is electrically conductive, that can be plastically formed, and that can be elastically deformed between loaded and unloaded configurations for 3,000 or more cycles.
  • the apparatus includes a central bight 110 that is disposed between the first and second ends 102a and 102b.
  • the central bight 110 has a concave contour 112 that defines a portion of the first surface 104a.
  • the central bight 110 also defines an outward projecting central portion 116 of the first edge 106.
  • the central bight 110 can be sized and shaped to resiliently surround an upstanding lead, to facilitate at least in part the elastic deformation of the apparatus 100 between unloaded and loaded configurations, and to resiliently go into an annular lead.
  • a first bight 120 is disposed between the central bight 110 and the first end 102a.
  • the first bight 120 has a convex contour 122 that defines a portion of the first surface 104a.
  • a second bight 130 is disposed between the central bight 110 and the second end 102b.
  • the second bight 130 has a convex contour 132 that also defines a portion of the first surface 104a.
  • a first contact segment 140 is disposed between the first bight 120 and the first end 102a, and a second contact segment 150 is disposed between the second bight 130 and the second end 102b.
  • the first bight 120 and the first contact segment 140 define a first portion 106a of the first edge 106
  • the second bight 120 and the second contact segment 150 define a second portion 106b of the first edge 106.
  • the first contact segment 140 includes a first leg 142 that projects outward from the second edge 108 and the second contact segment 150 includes a second leg 152 that similarly projects outward from the second edge 108.
  • the first leg 142 can include a first foot 144 and the second leg 152 includes a second foot 154.
  • the first and second feet 144 and 154 can perpendicularly project with respect to the first and second contact segments 140 and 150, respectively.
  • a first grip segment 160 is disposed between the first contact segment 140 and the first end 102a, and a second grip segment 170 is disposed the second contact segment 150 and between the second end 102b.
  • a first intermediate segment 180 is disposed between the first contact segment 140 and the first grip segment 160, and a second intermediate segment 190 disposed between the second contact segment 150 and the second grip segment 170.
  • the first intermediate segment 180 and the first grip segment 160 further define the first portion 106a of the first edge 106 and the second intermediate segment 190, and the second grip segment 170 second portion further define the second portion 106b of the first edge 106.
  • the first and second intermediate segments 180 and 190 can include a ridge, hole, or other formation to which alligator clips of independent leads may be attached so as to avoid slippage of the alligator clips' jaws.
  • a first receptacle 200 is disposed at the first end 102a and includes concave contour 202 that defines a portion of the first surface 104a.
  • a second receptacle 210 is disposed at the second end 102b and includes a concave contour 212 that also defines a portion of the first face 104a.
  • the first receptacle 200 defines a first end portion 206 of the first edge 106 and the second receptacle 210 defines a second end portion 216 of the first edge 106.
  • the first and second end portions 206 and 216 project outward from the first and second portions 106a and 106b, respectively, of the first edge 106.
  • the first and second receptacles 200 and 210 can be sized and shaped to resiliently receive and short together test probes of independent leads.
  • the central bight 110 is contiguously coupled to the first and second bights 120 and 130.
  • the first bight 110 is contiguously coupled to the first contact segment 140
  • the first grip segment 160 is contiguously coupled to the first receptacle 200
  • the first intermediate segment 180 contiguously couples the first contact segment 140 to the first grip segment 160.
  • the second bight 130 is contiguously coupled to the second contact segment 150
  • the second grip segment 170 is contiguously coupled to the second receptacle 210
  • the second intermediate segment 190 contiguously couples the second contact segment 150 to the second grip segment 170.
  • first face 104a is partially defined by the concave contour 112 of the central bight 110, the convex contours 122 and 132 of the first and second bights 120 and 130, and the concave contours 202 and 212 of the first and second receptacles 200 and 210.
  • the first intermediate segment 180 is angularly oriented with respect to the first contact segment 140 and with respect to the first grip segment 160.
  • the intermediate segment 180 can be orthogonally disposed with respect to the first grip segment 160 and can be obliquely disposed with respect to the first contact segment 140.
  • the second intermediate segment 190 is also angularly oriented with respect to the second contact segment 150 and the second grip segment 170.
  • the first intermediate segment 180 is contiguously coupled to the first contact segment 140 by a convex contour 182a that defines a portion of the first surface 104a and is contiguously coupled to the first grip segment 160 by a concave contour 182b that also defines a portion of the first surface 104a.
  • the second intermediate segment 190 is contiguously coupled to the second contact segment 150 by a convex contour 192a that defines a portion of the first surface 104a and is contiguously coupled to the second grip segment 170 by a concave contour 192b that defines a portion of the first surface 104a.
  • Figure 6 shows the "loaded" configuration of the apparatus 100.
  • the term "load” can refer to storing of potential energy.
  • a compressive force such as that indicated with arrows P, elastically deforms the apparatus 100 by displacing the first and second receptacles 200 and 210 toward one another, thereby loading the apparatus 100.
  • a partial release of the stored potential energy is referred to in the present disclosure as an "intermediate" configuration.
  • Figures 7A-7C illustrate an intermediate configuration of the apparatus shown in Figure 1 with respect to a first mains cord 300.
  • a "mains cord” refers to a plurality of leads that are fixed in a pattern.
  • Figures 7A and 7B respectively show elevation and end views of three leads arranged in a pattern that mimics a wall socket that is typically used in the United States.
  • Figure 7C is an end view similar to Figure 7B that shows an intermediate configuration of the apparatus 100 that is disposed, e.g., intermingled amongst the leads, in the first mains cord 300 pattern such that the three leads are shorted together.
  • the apparatus 100 is resiliently biased against each of the thee leads and provides an electrical conductor that shorts the leads together.
  • Figures 8A and 8B respectively show elevation and end views of a second mains cord 310 including three leads arranged in a pattern that mimics a wall socket that is typically used in Australia.
  • Figure 8C shows an intermediate configuration of the apparatus 100 disposed in the second mains cord 310 pattern such that the three leads are shorted together.
  • Figures 9A and 9B respectively show elevation and end views of a third mains cord 320 including three leads arranged in a pattern that mimics a wall socket that is typically used in Denmark.
  • Figure 9C shows an intermediate configuration of the apparatus 100 disposed in the third mains cord 320 pattern such that the three leads are shorted together.
  • Figures 10A and 10B respectively show elevation and end views of a fourth mains cord 330 including three leads arranged in a pattern that mimics a wall socket that is typically used in the United Kingdom.
  • Figure 10C shows an intermediate configuration of the apparatus 100 disposed in the fourth mains cord 330 pattern such that the three leads are shorted together.
  • Figures 11A and 11B respectively show elevation and end views of a fifth mains cord 340 including three leads arranged in a pattern that mimics a wall socket that is typically used in Switzerland.
  • Figure 11C shows an intermediate configuration of the apparatus 100 disposed in the fifth mains cord 340 pattern such that the three leads are shorted together.
  • Figures 12A and 12B respectively show elevation and end views of a sixth mains cord 350 including three leads arranged in a pattern that mimics a wall socket that is typically used in Italy.
  • Figure 12C shows an intermediate configuration of the apparatus 100 disposed in the sixth mains cord 350 pattern such that the three leads are shorted together.
  • Figures 13A and 13B respectively show elevation and end views of a seventh mains cord 360 including three leads arranged in a pattern that mimics a wall socket that is typically used in Europe.
  • Figure 13C shows an intermediate configuration of the apparatus 100 disposed in the seventh mains cord 360 pattern such that the three leads are shorted together.
  • the central portion 116 of the central bight 110 extends into and resiliently engages an annular lead, and the first and second feet 144 and 154 can be subsequently grasped to pull the apparatus away from the seventh mains cord 360.
  • the apparatus is oriented such that the central portion 116 projects away from a mains cord, the first and second legs 152 and 154 project toward the mains cord.
  • the projection of the first and second legs 152 and 154 from the second edge 108 is selected such that the first and second feet 144 and 154 can displace a safety sheath (not shown) that surrounds one or more of the leads or can maintain the apparatus 100 at a pre-selected distance away from the body of the mains cord such that the apparatus engages electrically conductive portions of the leads.
  • Figure 14 illustrates a method according to an embodiment of the present disclosure for shorting together the distal ends of the seventh mains cord 360 shown in Figures 13A-13C .
  • An electrical conductor e.g., apparatus 100
  • the forming can include plastically forming, e.g., punching, stamping, pressing, casting and/or other manufacturing operations, a substrate of beryllium copper that is plated with sulphamate nickel.
  • the electrical conductor is elastically deformed from the unloaded configuration to a loaded configuration in which potential energy is stored.
  • the electrical conductor is then disposed in a pattern of leads and permitted to resiliently assume an intermediate configuration at a potential energy level between the unloaded and loaded configurations.
  • disposing the electrical conductor can include inserting a projection of the electrical conductor into a recess defined by one of the three leads.
  • the opposite ends of the mains cord 360 can be electrically coupled to a multimeter 400 and a zeroing operation performed by the multimeter 400.
  • Figure 15 illustrates another method according to an embodiment of the present disclosure for shorting together the distal ends of test leads.
  • a set of test leads 370 include independent test probes that are not relatively fixed in a pattern.
  • the distal ends of the test leads 370 can be resiliently received in the first and second receptacles 200 and 210 and are shorted together by the electrical conductor.

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  • Measuring Leads Or Probes (AREA)
EP08162636A 2008-08-19 2008-08-19 Vorrichtung und Verfahren zur Nullstellung eines Prüfinstruments Withdrawn EP2157671A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08162636A EP2157671A1 (de) 2008-08-19 2008-08-19 Vorrichtung und Verfahren zur Nullstellung eines Prüfinstruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08162636A EP2157671A1 (de) 2008-08-19 2008-08-19 Vorrichtung und Verfahren zur Nullstellung eines Prüfinstruments

Publications (1)

Publication Number Publication Date
EP2157671A1 true EP2157671A1 (de) 2010-02-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2624419A (en) * 2022-11-17 2024-05-22 Super Rod Ltd Nulling device for electrical socket testing equipment

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982501A (en) 1932-06-13 1934-11-27 Harry A Douglas Connecting means
US2700752A (en) * 1951-03-28 1955-01-25 Pierce John B Foundation Electrical outlet fixture for receiving attachment plugs
US3601756A (en) 1969-08-14 1971-08-24 Burroughs Corp Terminator connector for multiconductor cable
US3951497A (en) * 1975-01-16 1976-04-20 Logic Dynamics, Inc. Electrical buss connector
US4029377A (en) * 1976-02-03 1977-06-14 Rogers Corporation Push-on bus bar
US4449771A (en) * 1979-12-10 1984-05-22 Carr David W Bus bar
US4470651A (en) * 1982-05-04 1984-09-11 B/K Patent Development, Inc. Modular electrical shunts for integrated circuit applications
US4820194A (en) * 1987-09-30 1989-04-11 Amp Incorporated Minature electrical shunt connector
EP0509634A1 (de) * 1991-04-18 1992-10-21 Polaroid Corporation Schutzvorrichtung für Halbleiterchipgehäuse von elektrostatischer Entladung
WO1997022997A1 (en) * 1995-12-21 1997-06-26 Polaroid Corporation Electrostatic discharge protection device
WO1997022998A1 (en) 1995-12-21 1997-06-26 Polaroid Corporation Electrostatic discharge protection device
GB2363526A (en) * 2000-06-16 2001-12-19 Entrelec Sa Spring contacts for connecting to bus bars

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982501A (en) 1932-06-13 1934-11-27 Harry A Douglas Connecting means
US2700752A (en) * 1951-03-28 1955-01-25 Pierce John B Foundation Electrical outlet fixture for receiving attachment plugs
US3601756A (en) 1969-08-14 1971-08-24 Burroughs Corp Terminator connector for multiconductor cable
US3951497A (en) * 1975-01-16 1976-04-20 Logic Dynamics, Inc. Electrical buss connector
US4029377A (en) * 1976-02-03 1977-06-14 Rogers Corporation Push-on bus bar
US4449771A (en) * 1979-12-10 1984-05-22 Carr David W Bus bar
US4470651A (en) * 1982-05-04 1984-09-11 B/K Patent Development, Inc. Modular electrical shunts for integrated circuit applications
US4820194A (en) * 1987-09-30 1989-04-11 Amp Incorporated Minature electrical shunt connector
EP0509634A1 (de) * 1991-04-18 1992-10-21 Polaroid Corporation Schutzvorrichtung für Halbleiterchipgehäuse von elektrostatischer Entladung
WO1997022997A1 (en) * 1995-12-21 1997-06-26 Polaroid Corporation Electrostatic discharge protection device
WO1997022998A1 (en) 1995-12-21 1997-06-26 Polaroid Corporation Electrostatic discharge protection device
GB2363526A (en) * 2000-06-16 2001-12-19 Entrelec Sa Spring contacts for connecting to bus bars

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2624419A (en) * 2022-11-17 2024-05-22 Super Rod Ltd Nulling device for electrical socket testing equipment

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