US20100123454A1 - Revolvable clamp meter - Google Patents
Revolvable clamp meter Download PDFInfo
- Publication number
- US20100123454A1 US20100123454A1 US12/274,355 US27435508A US2010123454A1 US 20100123454 A1 US20100123454 A1 US 20100123454A1 US 27435508 A US27435508 A US 27435508A US 2010123454 A1 US2010123454 A1 US 2010123454A1
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- US
- United States
- Prior art keywords
- base
- jaw
- clamp meter
- roller ball
- revolving
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/22—Tong testers acting as secondary windings of current transformers
Definitions
- the present invention generally relates to clamp meters, and more particularly to a clamp meter whose jaw member and body member are capable of revolving relative to each other so that the clamp meter's display panel could be conveniently turned to face the operator for easy reading.
- a clamp meter is an electrical device having a body member 41 and a jaw member 42 .
- the jaw member 42 has two jaws which open to allow clamping around an electrical cable L. This allows the electrical current or other electrical characteristic in the cable L to be measured, without having to make physical contact with the cable L, and the measurement is shown in a display panel 411 of the body member 41 .
- a major inconvenience of the clamp meter is that, when the meter clamps the cable L, the display panel 411 is quite often not facing the operator of the clamp meter. Either the clamp meter has to be twisted or the operator has to turn his head so as to read the measurement on the display panel 411 . There are circumstances that, for example, when the cable L is located in a box B and the display panel 411 is facing a lateral side B 1 of the box B, it is extremely difficult for the operator to read the measurement.
- the clamp meter contains a revolving member configured between the meter's body member and jaw member.
- the revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively.
- the first base and the second base are revolvably joined together by an axle extended axially from the body member into the jaw member via the first and second bases' aligned axle holes.
- the first base has at least a roller ball elastically embedded in a concave and exposed towards the second base. The roller ball would roll into one of a number of notches of the second base as the base and jaw members are rotated relative to each other, thereby creating a number of preset configurations of the included angle between the body and jaw members.
- FIG. 1 is a perspective diagram showing a clamp meter according to an embodiment of the present invention.
- FIG. 2 is a sectional diagram showing the clamp meter of FIG. 1 viewed from the direction marked 2 - 2 in FIG. 1 .
- FIG. 3 is a cross-sectional diagram showing the clamp member of FIG. 1 viewed from the direction marked 3 - 3 in FIG. 2 .
- FIG. 4 is a perspective diagram showing an operational scenario of the clamp meter of FIG. 1 in measuring a cable inside a box where the jaw and body members are at 90 degrees relative to each other.
- FIG. 5 is a sectional diagram showing the clamp meter of FIG. 1 viewed from the direction marked 5 - 5 in FIG. 4 .
- FIG. 6 is a cross-sectional diagram showing the clamp member of FIG. 1 viewed from the direction marked 6 - 6 in FIG. 5 .
- FIG. 7 is a perspective diagram showing an operational scenario of a conventional clamp meter in measuring a cable inside a box.
- a clamp meter contains a body member 10 having a display panel 11 , and a jaw member 20 at an end of the body member 10 for clamping around a cable L.
- the clamp meter measures a current or other electrical characteristic of the cable L and displays the measurement in the display panel 11 .
- the clamp meter further contains a revolving member 30 composed of a first base 31 and a second base 32 located on the interfacing sides of the body member 10 and the jaw member 20 , respectively.
- the first base 31 and the second base 32 are revolvably joined together so that, when the clamp meter clamps the cable L, its body member 10 or jaw member 20 could be turned to make the display panel 11 to face the operator, as illustrated in FIG. 4 .
- the clamp meter's measurement is therefore much more convenient to read.
- the first base 31 has a through first axle hole 310 so that an axle 311 is extended axially from the body member 10 via the first axle hole 310 .
- the second base 32 has a second axle hole 321 aligned with the first axle hole 310 to receive the axle 311 .
- the first and second bases 31 and 32 are revolvably joined together.
- at least a roller ball 313 is provided around the first axle hole 310 .
- the roller ball 313 is housed in a concave 312 and a spring 314 inside the concave 312 elastically supporting the roller ball 313 so that the roller ball 313 is raised towards the second base 32 or suppressed entirely into the concave 312 .
- a number of notches 322 are provided around the second axle hole 321 .
- the notches 322 are positioned such that, as the body member 10 and the jaw member 20 are rotated relative to each other, the roller ball 313 would roll into one of the notches 322 along the way, thereby creating a number of preset configurations of the included angle between the body and jaw members 10 and 20 .
- the revolving member 30 could further contain a flat disc 33 fixedly and perpendicularly joined to an end of the axle 311 that penetrates through the second base 32 .
- the diameter of the disc 33 is larger than that of the second axle hole 321 so that the second base 32 is reliably sandwiched between the disc 33 and the first base 31 .
- a first protrusion 331 towards the second base 32 is provided on an interfacing face of the disc 33 with the second base 32 .
- a second protrusion 323 towards the disc 33 is provided on an interfacing face of the second base 32 with the disc 33 .
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Clamps And Clips (AREA)
Abstract
Description
- The present invention generally relates to clamp meters, and more particularly to a clamp meter whose jaw member and body member are capable of revolving relative to each other so that the clamp meter's display panel could be conveniently turned to face the operator for easy reading.
- As shown in
FIG. 7 , a clamp meter is an electrical device having abody member 41 and ajaw member 42. Thejaw member 42 has two jaws which open to allow clamping around an electrical cable L. This allows the electrical current or other electrical characteristic in the cable L to be measured, without having to make physical contact with the cable L, and the measurement is shown in adisplay panel 411 of thebody member 41. - A major inconvenience of the clamp meter is that, when the meter clamps the cable L, the
display panel 411 is quite often not facing the operator of the clamp meter. Either the clamp meter has to be twisted or the operator has to turn his head so as to read the measurement on thedisplay panel 411. There are circumstances that, for example, when the cable L is located in a box B and thedisplay panel 411 is facing a lateral side B1 of the box B, it is extremely difficult for the operator to read the measurement. - Therefore a novel clamp meter is provided where its jaw member and body members are capable of revolving relative to each other and the clamp meter's display panel therefore could be conveniently turned to face the operator for easy reading.
- The clamp meter contains a revolving member configured between the meter's body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively. The first base and the second base are revolvably joined together by an axle extended axially from the body member into the jaw member via the first and second bases' aligned axle holes. The first base has at least a roller ball elastically embedded in a concave and exposed towards the second base. The roller ball would roll into one of a number of notches of the second base as the base and jaw members are rotated relative to each other, thereby creating a number of preset configurations of the included angle between the body and jaw members.
- The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
- Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
-
FIG. 1 is a perspective diagram showing a clamp meter according to an embodiment of the present invention. -
FIG. 2 is a sectional diagram showing the clamp meter ofFIG. 1 viewed from the direction marked 2-2 inFIG. 1 . -
FIG. 3 is a cross-sectional diagram showing the clamp member ofFIG. 1 viewed from the direction marked 3-3 inFIG. 2 . -
FIG. 4 is a perspective diagram showing an operational scenario of the clamp meter ofFIG. 1 in measuring a cable inside a box where the jaw and body members are at 90 degrees relative to each other. -
FIG. 5 is a sectional diagram showing the clamp meter ofFIG. 1 viewed from the direction marked 5-5 inFIG. 4 . -
FIG. 6 is a cross-sectional diagram showing the clamp member ofFIG. 1 viewed from the direction marked 6-6 inFIG. 5 . -
FIG. 7 is a perspective diagram showing an operational scenario of a conventional clamp meter in measuring a cable inside a box. - The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
- As shown in
FIGS. 1 to 6 , a clamp meter according to an embodiment of the present invention contains abody member 10 having adisplay panel 11, and ajaw member 20 at an end of thebody member 10 for clamping around a cable L. The clamp meter measures a current or other electrical characteristic of the cable L and displays the measurement in thedisplay panel 11. The clamp meter further contains a revolvingmember 30 composed of afirst base 31 and asecond base 32 located on the interfacing sides of thebody member 10 and thejaw member 20, respectively. Thefirst base 31 and thesecond base 32 are revolvably joined together so that, when the clamp meter clamps the cable L, itsbody member 10 orjaw member 20 could be turned to make thedisplay panel 11 to face the operator, as illustrated inFIG. 4 . The clamp meter's measurement is therefore much more convenient to read. - The
first base 31 has a throughfirst axle hole 310 so that anaxle 311 is extended axially from thebody member 10 via thefirst axle hole 310. Correspondingly, thesecond base 32 has asecond axle hole 321 aligned with thefirst axle hole 310 to receive theaxle 311. As such, the first andsecond bases first base 31 with thesecond base 32, at least aroller ball 313 is provided around thefirst axle hole 310. Theroller ball 313 is housed in a concave 312 and aspring 314 inside the concave 312 elastically supporting theroller ball 313 so that theroller ball 313 is raised towards thesecond base 32 or suppressed entirely into the concave 312. Similarly, along an interfacing face of thesecond base 32 with thefirst base 31, a number ofnotches 322 are provided around thesecond axle hole 321. Thenotches 322 are positioned such that, as thebody member 10 and thejaw member 20 are rotated relative to each other, theroller ball 313 would roll into one of thenotches 322 along the way, thereby creating a number of preset configurations of the included angle between the body andjaw members - The revolving
member 30 could further contain aflat disc 33 fixedly and perpendicularly joined to an end of theaxle 311 that penetrates through thesecond base 32. The diameter of thedisc 33 is larger than that of thesecond axle hole 321 so that thesecond base 32 is reliably sandwiched between thedisc 33 and thefirst base 31. - On an interfacing face of the
disc 33 with thesecond base 32, afirst protrusion 331 towards thesecond base 32 is provided. On the other hand, on an interfacing face of thesecond base 32 with thedisc 33, at least asecond protrusion 323 towards thedisc 33 is provided. As such, when thebody member 10 and thejaw member 20 are engaged into a relative rotation, they will be stopped at some point instead of continuously revolving around each other. For example, when thejaw member 20 is twisted clockwise or counterclockwise, it could be twisted only up to 90 degrees and cannot be twisted further due to the blocking of the first andsecond protrusions - While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/274,355 US7733080B1 (en) | 2008-11-20 | 2008-11-20 | Revolvable clamp meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/274,355 US7733080B1 (en) | 2008-11-20 | 2008-11-20 | Revolvable clamp meter |
Publications (2)
Publication Number | Publication Date |
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US20100123454A1 true US20100123454A1 (en) | 2010-05-20 |
US7733080B1 US7733080B1 (en) | 2010-06-08 |
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US12/274,355 Expired - Fee Related US7733080B1 (en) | 2008-11-20 | 2008-11-20 | Revolvable clamp meter |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104215820A (en) * | 2014-10-10 | 2014-12-17 | 国网重庆市电力公司电力科学研究院 | Novel high-voltage tong-type ammeter |
CN104459226A (en) * | 2014-12-22 | 2015-03-25 | 深圳市航天泰瑞捷电子有限公司 | High-voltage line monitor and shell of high-voltage line monitor |
US20170102411A1 (en) * | 2015-10-13 | 2017-04-13 | Fluke Corporation | Clamp meter |
CN110488069A (en) * | 2019-08-09 | 2019-11-22 | 国网浙江省电力有限公司温州市洞头区供电公司 | Insulating stretchable type clamp ammeter |
DE102022108138B4 (en) | 2022-04-05 | 2024-10-17 | Testo SE & Co. KGaA | current meter with rotating current clamp |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5222542B2 (en) * | 2007-12-07 | 2013-06-26 | 矢崎総業株式会社 | Current sensor |
US20110156696A1 (en) * | 2009-06-29 | 2011-06-30 | Fluke Corporation | Multimeter |
USD802456S1 (en) * | 2015-08-06 | 2017-11-14 | Fluke Corporation | Leakage clamp meter |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4476721A (en) * | 1982-08-10 | 1984-10-16 | Metrawatt Gmbh | Multi-purpose measuring device with a hinged display |
US5349289A (en) * | 1992-04-27 | 1994-09-20 | Kaise Kabushiki Kaisha | Clamp-on multimeter having a display for indicating the results of a plurality of measurements |
US5610512A (en) * | 1991-09-12 | 1997-03-11 | Lem Heme Limited | Clamp-on electrical measuring device |
US6091237A (en) * | 1999-09-14 | 2000-07-18 | Chen; Lee-Fei | Three-phrase clamp-type power meter |
US6456060B1 (en) * | 2000-08-29 | 2002-09-24 | Actuant Corporation | Multi-meter with locking clamp |
US6975104B2 (en) * | 2004-02-20 | 2005-12-13 | Ideal Industries, Inc. | Clamp meter with dual display |
US7018247B1 (en) * | 2005-03-22 | 2006-03-28 | Eaton Corporation | Clamp-jaw contact assembly with integral jaw spring and meter socket employing the same |
-
2008
- 2008-11-20 US US12/274,355 patent/US7733080B1/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4476721A (en) * | 1982-08-10 | 1984-10-16 | Metrawatt Gmbh | Multi-purpose measuring device with a hinged display |
US5610512A (en) * | 1991-09-12 | 1997-03-11 | Lem Heme Limited | Clamp-on electrical measuring device |
US5349289A (en) * | 1992-04-27 | 1994-09-20 | Kaise Kabushiki Kaisha | Clamp-on multimeter having a display for indicating the results of a plurality of measurements |
US6091237A (en) * | 1999-09-14 | 2000-07-18 | Chen; Lee-Fei | Three-phrase clamp-type power meter |
US6456060B1 (en) * | 2000-08-29 | 2002-09-24 | Actuant Corporation | Multi-meter with locking clamp |
US6975104B2 (en) * | 2004-02-20 | 2005-12-13 | Ideal Industries, Inc. | Clamp meter with dual display |
US7018247B1 (en) * | 2005-03-22 | 2006-03-28 | Eaton Corporation | Clamp-jaw contact assembly with integral jaw spring and meter socket employing the same |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104215820A (en) * | 2014-10-10 | 2014-12-17 | 国网重庆市电力公司电力科学研究院 | Novel high-voltage tong-type ammeter |
CN104459226A (en) * | 2014-12-22 | 2015-03-25 | 深圳市航天泰瑞捷电子有限公司 | High-voltage line monitor and shell of high-voltage line monitor |
US20170102411A1 (en) * | 2015-10-13 | 2017-04-13 | Fluke Corporation | Clamp meter |
US10114043B2 (en) * | 2015-10-13 | 2018-10-30 | Fluke Corporation | Clamp meter |
US10557869B2 (en) | 2015-10-13 | 2020-02-11 | Fluke Corporation | Clamp meter |
CN110488069A (en) * | 2019-08-09 | 2019-11-22 | 国网浙江省电力有限公司温州市洞头区供电公司 | Insulating stretchable type clamp ammeter |
DE102022108138B4 (en) | 2022-04-05 | 2024-10-17 | Testo SE & Co. KGaA | current meter with rotating current clamp |
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Publication number | Publication date |
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US7733080B1 (en) | 2010-06-08 |
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