WO2000046604A1 - Electricity meter having a conductive shield for reflecting electric fields - Google Patents
Electricity meter having a conductive shield for reflecting electric fields Download PDFInfo
- Publication number
- WO2000046604A1 WO2000046604A1 PCT/US1999/031192 US9931192W WO0046604A1 WO 2000046604 A1 WO2000046604 A1 WO 2000046604A1 US 9931192 W US9931192 W US 9931192W WO 0046604 A1 WO0046604 A1 WO 0046604A1
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- WIPO (PCT)
- Prior art keywords
- bezel
- conductive
- face
- conductive film
- cover
- Prior art date
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Classifications
-
- 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
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/065—Details of electronic electricity meters related to mechanical aspects
Definitions
- This invention relates generally to electricity meters and, more particularly, to providing protection for internal electronic components of an electricity meter from high strength electric fields.
- electricity meters include electronic components which are sensitive and susceptible to external electric fields.
- electricity meters may include voltage sensors, current sensors, analog to digital converters, and digital signal processors, as well as other components.
- an electricity meter including a conductive shield capable of reflecting electric fields away from electronic components that are internal to a meter cover.
- the conductive shield includes a conductive coating, a conductive tape having a conductive pressure-sensitive adhesive, and a conductive film, alone or in any combination.
- the electricity meter cover includes an open end, a face, a sidewall extending from the face, and an inner surface. At least a portion of the cover inner surface is coated with the conductive coating.
- the cover face includes a transparent portion.
- a first conductive film is secured to the inside of the cover over the transparent portion by a portion of a conductive tape having a conductive pressure sensitive adhesive.
- the conductive tape provides an electric pathway between the conductive material and the conductive film.
- the electricity meter also includes a bezel having a first end, a second end, a sidewall, and an inner surface. At least a portion of the bezel inner surface is coated with the conductive coating.
- the first end of the bezel is open and the second end includes a face having a window.
- a second conductive film is secured to the inside of the bezel over the window by a portion of the conductive tape.
- a third conductive film is positioned over the outside of the bezel face. The conductive tape and the conductive film are both adapted to reflect electric fields.
- the electricity meter further includes a shroud having a first open end, a second open end, and a sidewall with an inner surface. At least a portion of the shroud side wall inner surface is coated with the conductive coating.
- the shroud first open end is connected with the bezel open end and the meter cover is configured to be positioned over the bezel and the shroud when the shroud is connected to the bezel.
- the above described conductive shield protects electricity meter electronic components interior to the cover from electric field influence.
- the conductive shielding reflects electric fields away from the internal components. This protection reduces the possibility of inaccurate readings even if the meter is subjected to radio frequency signals with high electric field strength.
- Figure 1 is a perspective view of a meter cover.
- Figure 2 is a cross section of the meter cover shown in Figure 1 along A-A.
- Figure 3 is a perspective view of the exterior of a bezel.
- Figure 4 is a perspective view of the interior of the bezel shown in Figure 3.
- Figure 5 is a back view of a conductive film.
- Figure 6 is a rear view of a shroud.
- Figures 1 and 2 show a meter cover 100 including an open end 102, a face 104, a sidewall 106 extending from face 104, and an inner surface 108. At least a portion of inner surface 108 is at least partially coated with a metal-filled conductive material 110.
- Conductive material 110 reflects at least a portion of an electric field away from electronic components (not shown) that are internal to meter cover 100.
- inner surface 108 includes conductive material 110 thereon.
- Cover 100 includes a transparent section 112 on face 104 that does not include conductive material 110.
- a conductive film (not shown) is positioned over transparent section 112 on the inside of cover 100 and is secured to cover 100 by a double-sided conductive tape (not shown).
- the conductive film has the general shape of transparent section 112.
- One side of the conductive tape adheres to cover 100 and the other side of the conductive tape adheres to the conductive film.
- an electric pathway is created between conductive material 110 and the conductive film.
- the conductive tape in conjunction with the conductive film provide shielding of the internal electronic components (not shown) from electric fields.
- the conductive film and the conductive tape are described in detail below.
- a method of coating a surface with conductive material 110 includes spraying conductive material 110 on at least a portion of the surface to be coated.
- Conductive material 110 can be fabricated from silver, nickel, and/or copper.
- conductive coating can be a silver-nickel filled conductive acrylic coating suitable for electromagnetic interference (EMI) shielding of commercial thermoplastic housings.
- Conductive material 110 is corrosion-resistant, and can withstand exposure to outside environments.
- One suitable coating is CHO-SHIELD ® 4925 Conductive Coating commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888.
- Figures 3 and 4 are perspective views of an exterior 114, and an interior 116, respectively, of a bezel 118.
- Bezel 118 includes an open end 120, a face 122, and a sidewall 124.
- Bezel face 122 includes a window 126 and a periphery 128 surrounding window 126.
- Bezel face 122 also includes a first slot 130, a second slot 132, and a third slot 134.
- Bezel 118 further includes an inner surface 136. At least a portion of bezel inner surface 136 is at least partially coated with conductive material 110. In one embodiment, inner surface 136 of sidewall 124 and face 122 are entirely coated with conductive material 110 while window 126 is not coated with conductive material 110.
- a conductive film (not shown) is positioned over the inside of window 126 and is secured to bezel 118 surrounding periphery 128 of window 126 by a double-sided conductive tape (not shown).
- the conductive film has the general shape and size of window 126 and has a conductive coating on one side. The coating side of the conductive film faces window 126.
- One side of the conductive tape adheres to bezel 118 and the other side of the conductive tape adheres to the conductive film.
- an electric pathway is created between conductive material 110 and the conductive film.
- the conductive tape in conjunction with the conductive film provides shielding of the internal electronic components (not shown) from electric fields.
- the conductive film and the conductive tape are described in detail below.
- Conductive tape 138 can be a corrosion resistant nickel-plated cloth coated with a highly conductive pressure-sensitive adhesive containing a dispersion of conductive particles.
- copper, aluminum, or tinned copper foil can be coated, at least partially, with a highly conductive pressure-sensitive adhesive.
- Double-sided conductive tape 138 can be fabricated by coating the adhesive on both sides of conductive tape 138.
- Two suitable tapes are CHO-FABTM and CHO-FOIL ® tapes commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888.
- Figure 5 is a back view of a conductive film 140 that includes a first tab 142, a second tab 144, and a third tab 146.
- Conductive film 142 can be a polyester film including a thin conductive coating 148 of a silver oxide based composition.
- One suitable polyester film is Mylar ® which is commercially available from E. I. du Pont de Nemours & Company, 1007 Market Street, Wilmington, Delaware 19898.
- Conductive coating 148 reflects electric fields and is a good EMI shielding material.
- One suitable conductive film is WIN-SHIELDTM AgF8 Conductive Film commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888.
- a method of placing conductive film 140 on bezel 118 includes positioning conductive film 140 over an exterior of bezel face 122 so that tabs 142, 144, and 146 fit into slots 130, 132, and 134 respectively. Conductive film 140 then provides shielding from electric fields for a meter display (not shown).
- FIG. 6 is a rear view of a shroud 150.
- Shroud 150 includes a first open end (not shown), a second open end 152, and a sidewall 154.
- Sidewall 154 extends between the first open end of shroud 150 and second open end 152 and has an inner surface 156 that can be at least partially coated with conductive material 110.
- the first open end of shroud 150 can connect to bezel open end 120.
- Cover 100 can then be positioned over bezel 118 while bezel 118 is connected to shroud 150.
- a meter base (not shown) can be connected to shroud second open end 152 and to cover open end 102.
- Cover inner surface 108 is coated with conductive material 110, except for transparent section 112.
- a first conductive film (not shown) is positioned over transparent section 112 and is secured to cover 100 by double-sided conductive tape 138.
- One side of conductive tape 138 is affixed to cover 100 and the other side of conductive tape 138 is affixed to the first conductive film.
- Conductive tape 138 provides an electric pathway between conductive material 110 and the first conductive film.
- Conductive film 140 is placed over bezel face 122 and tabs 142, 144, and 146 are positioned within slots 130, 132, and 134. Bezel interior 116 and an interior 158 of shroud 150 are thus shielded from electric fields.
- This shielding protects internal components (not shown) from electric field influence by reflecting electric fields away from the internal components.
- the shielding helps to enable the meter to provide accurate readings even in the presence of external electric fields.
- Conductive material 110, film 140, and tape 138 can be used in the meter, either alone, or in any combination. As well, conductive material 110 can be applied to shroud 150, bezel 118, and cover 100, either alone, or in any combination.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
An electricity meter includes a cover, a base, a bezel, a shroud, and a conductive shield for reflecting electric fields away from the meter. The conductive shield includes a conductive coating, a conductive tape having a conductive pressure-sensitive adhesive, and a conductive film, or any combination thereof. The conductive coating is applied to at least a portion of one or more of the cover, the bezel, and the shroud. The conductive tape includes a conductive pressure-sensitive adhesive that secures the tape to a surface. A first conductive film is configured to be positioned over at least a portion of a bezel face, and a second conductive film is configured to be positioned over at least a portion of a cover face.
Description
ELECTRICITY METER HAVING A CONDUCTIVE
SHIELD FOR REFLECTING ELECTRIC FIELDS
Cross Reference to Related Application
This application claims the benefit of U.S. Provisional Application No. 60/078,542, filed March 19, 1998.
Field of the Invention
This invention relates generally to electricity meters and, more particularly, to providing protection for internal electronic components of an electricity meter from high strength electric fields.
Background of the Invention
Present day electricity meters include electronic components which are sensitive and susceptible to external electric fields. For example, electricity meters may include voltage sensors, current sensors, analog to digital converters, and digital signal processors, as well as other components.
Accordingly, it would be desirable to provide an inexpensive shield that could be used in new meters and also retrofitted to existing meters that reduces the susceptibility of the meter to radio frequency influence.
Summary of the Invention
These and other objects may be attained by an electricity meter including a conductive shield capable of reflecting electric fields away from electronic components that are internal to a meter cover. The conductive shield includes a conductive coating, a conductive tape having a conductive pressure-sensitive adhesive, and a conductive film, alone or in any combination. Particularly, the electricity meter cover includes an open end, a face, a sidewall extending from the face, and an inner surface. At least a portion of the cover inner surface is coated with the conductive coating. The cover face includes a transparent portion. A first conductive film is secured to the inside of the cover over the transparent portion by a portion of a conductive tape having a conductive pressure sensitive adhesive. The conductive tape provides an electric pathway between the conductive material and the conductive film.
The electricity meter also includes a bezel having a first end, a second end, a sidewall, and an inner surface. At least a portion of the bezel inner surface is coated with the conductive coating. The first end of the bezel is open and the second end includes a face having a window. A second conductive film is secured to the inside of the bezel over the window by a portion of the conductive tape. A third conductive film is positioned over the outside of the bezel face. The conductive tape and the conductive film are both adapted to reflect electric fields.
The electricity meter further includes a shroud having a first open end, a second open end, and a sidewall with an inner surface. At least a portion of the shroud side wall inner surface is coated with the conductive coating. The shroud first open end is connected with the bezel open end and the meter cover is configured to be positioned over the bezel and the shroud when the shroud is connected to the bezel.
The above described conductive shield protects electricity meter electronic components interior to the cover from electric field influence. The conductive shielding reflects electric fields away from the internal components. This protection reduces the
possibility of inaccurate readings even if the meter is subjected to radio frequency signals with high electric field strength.
Brief Description of the Drawings
Figure 1 is a perspective view of a meter cover.
Figure 2 is a cross section of the meter cover shown in Figure 1 along A-A.
Figure 3 is a perspective view of the exterior of a bezel.
Figure 4 is a perspective view of the interior of the bezel shown in Figure 3.
Figure 5 is a back view of a conductive film.
Figure 6 is a rear view of a shroud.
Detailed Description
Figures 1 and 2 show a meter cover 100 including an open end 102, a face 104, a sidewall 106 extending from face 104, and an inner surface 108. At least a portion of inner surface 108 is at least partially coated with a metal-filled conductive material 110.
Conductive material 110 reflects at least a portion of an electric field away from electronic components (not shown) that are internal to meter cover 100. In one embodiment, inner surface 108 includes conductive material 110 thereon. Cover 100 includes a transparent section 112 on face 104 that does not include conductive material 110. Instead, a conductive film (not shown) is positioned over transparent section 112 on the inside of cover 100 and is secured to cover 100 by a double-sided conductive tape (not shown). The conductive film has the general shape of transparent section 112. One side of the conductive tape adheres to cover 100 and the other side of the conductive tape adheres to the conductive film. When the conductive tape secures the conductive film to cover 100, an electric pathway is created between conductive
material 110 and the conductive film. The conductive tape in conjunction with the conductive film provide shielding of the internal electronic components (not shown) from electric fields. The conductive film and the conductive tape are described in detail below.
A method of coating a surface with conductive material 110 includes spraying conductive material 110 on at least a portion of the surface to be coated. Conductive material 110 can be fabricated from silver, nickel, and/or copper. In one embodiment, conductive coating can be a silver-nickel filled conductive acrylic coating suitable for electromagnetic interference (EMI) shielding of commercial thermoplastic housings. Conductive material 110 is corrosion-resistant, and can withstand exposure to outside environments. One suitable coating is CHO-SHIELD® 4925 Conductive Coating commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888.
Figures 3 and 4 are perspective views of an exterior 114, and an interior 116, respectively, of a bezel 118. Bezel 118 includes an open end 120, a face 122, and a sidewall 124. Bezel face 122 includes a window 126 and a periphery 128 surrounding window 126. Bezel face 122 also includes a first slot 130, a second slot 132, and a third slot 134. Bezel 118 further includes an inner surface 136. At least a portion of bezel inner surface 136 is at least partially coated with conductive material 110. In one embodiment, inner surface 136 of sidewall 124 and face 122 are entirely coated with conductive material 110 while window 126 is not coated with conductive material 110. A conductive film (not shown) is positioned over the inside of window 126 and is secured to bezel 118 surrounding periphery 128 of window 126 by a double-sided conductive tape (not shown). The conductive film has the general shape and size of window 126 and has a conductive coating on one side. The coating side of the conductive film faces window 126. One side of the conductive tape adheres to bezel 118 and the other side of the conductive tape adheres to the conductive film. When the conductive tape secures the conductive film to bezel 118, an electric pathway is created between conductive material 110 and the conductive film. The conductive tape in conjunction with the conductive film provides shielding of the internal electronic
components (not shown) from electric fields. The conductive film and the conductive tape are described in detail below.
Conductive tape 138 can be a corrosion resistant nickel-plated cloth coated with a highly conductive pressure-sensitive adhesive containing a dispersion of conductive particles. Alternatively, copper, aluminum, or tinned copper foil can be coated, at least partially, with a highly conductive pressure-sensitive adhesive. Double-sided conductive tape 138 can be fabricated by coating the adhesive on both sides of conductive tape 138. Two suitable tapes are CHO-FAB™ and CHO-FOIL® tapes commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888.
Figure 5 is a back view of a conductive film 140 that includes a first tab 142, a second tab 144, and a third tab 146. Conductive film 142 can be a polyester film including a thin conductive coating 148 of a silver oxide based composition. One suitable polyester film is Mylar® which is commercially available from E. I. du Pont de Nemours & Company, 1007 Market Street, Wilmington, Delaware 19898. Conductive coating 148 reflects electric fields and is a good EMI shielding material. One suitable conductive film is WIN-SHIELD™ AgF8 Conductive Film commercially available from the Chomerics Division of Parker Hannifin Corporation, 77 Dragon Court, Woburn, Massachusetts 01888. A method of placing conductive film 140 on bezel 118 includes positioning conductive film 140 over an exterior of bezel face 122 so that tabs 142, 144, and 146 fit into slots 130, 132, and 134 respectively. Conductive film 140 then provides shielding from electric fields for a meter display (not shown).
Figure 6 is a rear view of a shroud 150. Shroud 150 includes a first open end (not shown), a second open end 152, and a sidewall 154. Sidewall 154 extends between the first open end of shroud 150 and second open end 152 and has an inner surface 156 that can be at least partially coated with conductive material 110. The first open end of shroud 150 can connect to bezel open end 120. Cover 100 can then be positioned over bezel 118 while bezel 118 is connected to shroud 150.
In one embodiment, a meter base (not shown) can be connected to shroud second open end 152 and to cover open end 102. Cover inner surface 108 is coated with conductive material 110, except for transparent section 112. A first conductive film (not shown) is positioned over transparent section 112 and is secured to cover 100 by double-sided conductive tape 138. One side of conductive tape 138 is affixed to cover 100 and the other side of conductive tape 138 is affixed to the first conductive film. Conductive tape 138 provides an electric pathway between conductive material 110 and the first conductive film. Conductive film 140 is placed over bezel face 122 and tabs 142, 144, and 146 are positioned within slots 130, 132, and 134. Bezel interior 116 and an interior 158 of shroud 150 are thus shielded from electric fields.
This shielding protects internal components (not shown) from electric field influence by reflecting electric fields away from the internal components. The shielding helps to enable the meter to provide accurate readings even in the presence of external electric fields.
Conductive material 110, film 140, and tape 138, can be used in the meter, either alone, or in any combination. As well, conductive material 110 can be applied to shroud 150, bezel 118, and cover 100, either alone, or in any combination.
From the preceding description of various embodiments of the present invention, it is evident that the objects of the invention are attained. Although the invention has been described and illustrated in detail, it is to be clearly understood that the same is intended by way of illustration and example only and is not to be taken by way of limitation. Accordingly, the spirit and scope of the invention are to be limited only by the terms of the appended claims.
Claims
1. An electricity meter comprising:
a cover comprising a face, a sidewall extending from said cover face, and an inner surface including a metal-filled conductive material thereon for reflecting at least a portion of an electric field.
2. An electricity meter in accordance with Claim 1 further comprising a bezel comprising an open end, a face, a sidewall extending between said bezel face and said bezel open end, and an inner surface including a metal-filled conductive material thereon for reflecting at least a portion of an electric field, said cover positioned over said bezel.
3. An electricity meter in accordance with Claim 2 further comprising a shroud comprising:
a first open end configured to connect to said bezel open end;
a second open end;
a sidewall extending between said shroud first and second open ends; and
an inner surface including a metal-filled conductive material thereon for reflecting at least a portion of an electric field.
4. An electricity meter in accordance with Claim 2 further comprising:
a first conductive film; a conductive tape including a conductive pressure-sensitive adhesive; and
a bezel face window having a periphery, said first conductive film secured to an interior of said bezel by said conductive tape which is affixed to said bezel face surrounding said window along said periphery, said conductive tape adapted to reflect at least a portion of an electric field.
5. An electricity meter in accordance with Claim 4 further comprising a second conductive film positioned over an exterior of at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field.
6. An electricity meter in accordance with Claim 5 wherein said conductive material comprises a silver-nickel compound.
7. An electricity meter comprising a bezel comprising a face, a sidewall extending from said bezel face, and an inner surface including a conductive material thereon for reflecting at least a portion of an electric field.
8. An electricity meter in accordance with Claim 7 further comprising:
a conductive film; and
a window located on said bezel face, said window having a periphery, said conductive film positioned over at least a portion of said bezel face window, said conductive film adapted to reflect electric fields.
An electricity meter in accordance with Claim 7 further comprising: a conductive tape;
a conductive film; and
a window located on said bezel face, said window having a periphery, said conductive film secured to at least a portion of said bezel face window with said conductive tape, said conductive film and said conductive tape adapted to reflect electric fields.
10. An electricity meter in accordance with Claim 7 further comprising a shroud comprising a first open end, a second open end, and a sidewall having an inner surface including a conductive material thereon for reflecting at least a portion of an electric field, said sidewall extending between said shroud first and second open ends, said shroud first open end connected to said bezel.
11. An electricity meter in accordance with Claim 7 further comprising:
a cover comprising a face, a sidewall extending from said cover face, and an inner surface including a conductive material thereon for reflecting at least a portion of an electric field, said cover configured to fit over said bezel;
a conductive film positioned over at least a portion of said cover face, said conductive film adapted to reflect electric fields; and
a pressure sensitive conductive tape securing said second conductive film to said cover, said conductive tape adapted to reflect at least a portion of an electric field.
12. An electricity meter in accordance with Claim 7 further comprising:
a conductive film positioned over at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field;
a window located on said bezel face; and a conductive tape securing said conductive film to said bezel, said conductive tape affixed to said bezel face surrounding said window, said conductive tape adapted to reflect at least a portion of an electric field.
13. An electricity meter comprising a shroud comprising a first open end, a second open end, a sidewall extending between said shroud first and second open ends, and an inner surface on said shroud sidewall, said inner surface including a conductive material for reflecting at least a portion of an electric field.
14. An electricity meter in accordance with Claim 12 further comprising a bezel comprising a face, an open end, a sidewall extending between said bezel face and said bezel open end, and an inner surface including a conductive material for reflecting at least a portion of an electric field, said bezel open end connected to said shroud first open end.
15. An electricity meter in accordance with Claim 14 further comprising:
a conductive film positioned over at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field;
a conductive tape securing said conductive film to said bezel, said conductive tape adapted to reflect at least a portion of an electric field; and
a window located on said bezel face, said conductive tape affixed to said bezel face surrounding said window.
16. An electricity meter in accordance with Claim 14 further comprising a conductive film positioned over at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field.
17. An electricity meter in accordance with Claim 13 further comprising a cover comprising a face, a sidewall extending from said cover face, and an inner surface including a conductive material for reflecting at least a portion of an electric field, said cover configured to be positioned over said bezel and said shroud when said bezel open end is connected to said shroud open end.
18. An electricity meter comprising:
a bezel comprising a face having a window, a sidewall extending from said face, and an inner surface; and
a conductive tape, said conductive tape affixed to said bezel face surrounding said window, said conductive tape adapted to reflect at least a portion of an electric field.
19. An electricity meter in accordance with Claim 18 wherein said inner surface includes a conductive material for reflecting at least a portion of an electric field.
20. An electricity meter in accordance with Claim 19 further comprising:
a conductive film positioned over at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field; a conductive tape securing said conductive film to said bezel, said conductive tape adapted to reflect at least a portion of an electric field, said conductive tape affixed to said bezel face surrounding said window.
21. An electricity meter in accordance with Claim 18 further comprising:
a cover comprising a face, a sidewall extending from said cover face, and an inner surface including a conductive material for reflecting at least a portion of an electric field, said cover configured to fit over said bezel;
a conductive film positioned over at least a portion of said cover face, said conductive film adapted to reflect electric fields; and
a conductive tape securing said second conductive film to said cover, said conductive tape adapted to reflect at least a portion of an electric field.
22. An electricity meter in accordance with Claim 18 further comprising a conductive film positioned over at least a portion of said bezel face, said conductive film adapted to reflect at least a portion of an electric field.
23. An electricity meter in accordance with Claim 18 further comprising a shroud comprising at least one end and a sidewall having an inner surface including a conductive material for reflecting at least a portion of an electric field, said sidewall extending from said shroud end, said shroud end connected to said bezel.
24. An electricity meter comprising:
a bezel comprising a face having a window, and a sidewall extending from said bezel face; and a conductive film positioned over an exterior of said bezel face window, said conductive film adapted to reflect at least a portion of an electric field.
25. An electricity meter in accordance with Claim 24 further comprising a cover comprising a face, a sidewall extending from said face, and an inner surface including a conductive material for reflecting at least a portion of an electric field, said cover configured to fit over said bezel.
26. An electricity meter in accordance with Claim 24 wherein said bezel further comprises an inner surface including a conductive material for reflecting at least a portion of an electric field.
27. An electricity meter in accordance with Claim 24 further comprising conductive tape, said conductive tape affixed to said bezel face surrounding said window, said conductive tape adapted to reflect at least a portion of an electric field.
28. An electricity meter in accordance with Claim 24 further comprising a shroud comprising at least one end and a sidewall having an inner surface including a conductive material for reflecting at least a portion of an electric field, said sidewall extending from said shroud end, said shroud end connected to said bezel.
29. An electricity meter comprising:
a cover comprising a face, a sidewall extending from said cover face, and an inner surface including a conductive material thereon, said conductive material for reflecting at least a portion of an electric field; a bezel comprising a face, a sidewall extending from said bezel face, and an inner surface;
a first conductive film positioned over at least a portion of said bezel face, said first conductive film adapted to reflect at least a portion of an electric field;
a second conductive film positioned over at least a portion of said cover face, said second conductive film adapted to reflect at least a portion of an electric field; and
a first pressure sensitive conductive tape securing said second conductive film to said cover, said first conductive tape adapted to reflect at least a portion of an electric field.
30. An electricity meter in accordance with Claim 29 further comprising:
a second conductive tape;
a third conductive film; and
a window located on said bezel face, said window having a periphery,
said conductive tape securing said third conductive film to said bezel face window along said periphery, said conductive film and said conductive tape adapted to reflect electric fields.
31. An electricity meter in accordance with Claim 30 further comprising a shroud including a first open end, a second open end, and a sidewall extending between said shroud first and second open ends, said shroud sidewall comprising an inner surface including a conductive material thereon, said bezel open end connected to said shroud first open end.
32. An electricity meter in accordance with Claim 31 wherein said bezel inner surface includes a conductive material thereon.
33. An electricity meter cover comprising:
a face including a transparent portion;
a sidewall extending from said face;
an inner surface; and
a conductive film positioned over said transparent portion of said face and secured to said cover, said conductive film for reflecting at least a portion of an electric field.
34. An electricity meter cover in accordance with Claim 33 further comprising a pressure sensitive conductive tape securing said conductive film to said cover.
35. An electricity meter cover in accordance with Claim 34 wherein said conductive tape includes adhesive on two sides, one side affixed to said conductive film and the other side affixed to said cover.
36. An electricity meter cover in accordance with Claim 33 wherein said inner surface includes a conductive material thereon.
37. A method of shielding components of an electricity meter from electric fields, the electricity meter comprising a bezel including a face with a window, a side wall extending from the bezel face, an outer surface, and an inner surface, a shroud comprising at least one end and a sidewall having an inner surface, and a cover comprising a face, a sidewall extending from said face, and an inner surface, the shroud end configured for connection with the bezel, and the cover configured for placement over the bezel when the bezel is attached to the shroud, said method comprising the step of:
placing a conductive shield on at least one of the cover, the bezel, and the shroud, the conductive shield for reflecting at least a portion of the electric fields away from the internal components.
38. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the step of applying a conductive material on at least a portion of the bezel inner surface.
39. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the step of applying a conductive material on at least a portion of the cover inner surface.
40. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the step of applying a conductive material on at least a portion of the shroud inner surface.
41. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the step of positioning a conductive film over at least a portion of the bezel face.
42. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the steps of:
positioning a conductive film over at least a portion of the bezel face; and
securing the conductive film to the bezel with a conductive tape.
43. A method in accordance with Claim 42 wherein said step of securing the conductive film to the bezel comprises the steps of:
affixing one side of the conductive tape to the conductive film; and
affixing the other side of the conductive tape to the cover.
44. A method in accordance with Claim 37 wherein said step of placing a conductive shield on the meter comprises the steps of:
positioning a conductive film over at least a portion of the cover face; and
securing the conductive film to the cover with a conductive tape.
45. A method in accordance with Claim 44 wherein the step of securing the conductive film to the cover comprises the steps of:
affixing one side of the conductive tape to the conductive film; and
affixing the other side of the conductive tape to the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002322636A CA2322636A1 (en) | 1999-01-11 | 1999-12-29 | Electricity meter having a conductive shield for reflecting electric fields |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22832299A | 1999-01-11 | 1999-01-11 | |
| US09/228,322 | 1999-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000046604A1 true WO2000046604A1 (en) | 2000-08-10 |
Family
ID=22856706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1999/031192 WO2000046604A1 (en) | 1999-01-11 | 1999-12-29 | Electricity meter having a conductive shield for reflecting electric fields |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1292875A (en) |
| CA (1) | CA2322636A1 (en) |
| WO (1) | WO2000046604A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645832B (en) * | 2017-01-03 | 2019-08-16 | 宁夏隆基宁光仪表股份有限公司 | A kind of anti-interference digital electric meter and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH585410A5 (en) * | 1975-06-04 | 1977-02-28 | Landis & Gyr Ag | Transparent plastic cover for electrostatically operated instruments - provides shielding against electric fields by means of conducting lacquer layers |
| DE3508755A1 (en) * | 1985-02-15 | 1986-08-21 | LGZ Landis & Gyr Zug AG, Zug | Tariff device installed in an electricity meter housing |
| EP0420544A2 (en) * | 1989-09-25 | 1991-04-03 | General Electric Company | Electromagnetic and thermal shield for electronic energy meter |
-
1999
- 1999-12-29 WO PCT/US1999/031192 patent/WO2000046604A1/en active Application Filing
- 1999-12-29 CA CA002322636A patent/CA2322636A1/en not_active Abandoned
- 1999-12-29 CN CN 99803851 patent/CN1292875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH585410A5 (en) * | 1975-06-04 | 1977-02-28 | Landis & Gyr Ag | Transparent plastic cover for electrostatically operated instruments - provides shielding against electric fields by means of conducting lacquer layers |
| DE3508755A1 (en) * | 1985-02-15 | 1986-08-21 | LGZ Landis & Gyr Zug AG, Zug | Tariff device installed in an electricity meter housing |
| EP0420544A2 (en) * | 1989-09-25 | 1991-04-03 | General Electric Company | Electromagnetic and thermal shield for electronic energy meter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1292875A (en) | 2001-04-25 |
| CA2322636A1 (en) | 2000-08-10 |
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