US20070137121A1 - Electrical Box - Google Patents
Electrical Box Download PDFInfo
- Publication number
- US20070137121A1 US20070137121A1 US11/567,768 US56776806A US2007137121A1 US 20070137121 A1 US20070137121 A1 US 20070137121A1 US 56776806 A US56776806 A US 56776806A US 2007137121 A1 US2007137121 A1 US 2007137121A1
- Authority
- US
- United States
- Prior art keywords
- box
- hole
- joist
- cavity
- fastener
- 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.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/12—Distribution boxes; Connection or junction boxes for flush mounting
- H02G3/123—Distribution boxes; Connection or junction boxes for flush mounting in thin walls
- H02G3/126—Distribution boxes; Connection or junction boxes for flush mounting in thin walls with supporting means for mounting on a single wall stud
Definitions
- This application relates to electrical boxes.
- An electrical box is used for connecting a ceiling fan or light fixture to a ceiling joist.
- the box is fastened to the joist and provides a compartment that contains electrical connections for the fan or fixture.
- a joist has a front surface and first and second opposite side surfaces.
- the side surfaces extend in a rearward direction from the front surface. They also extend in a lateral direction perpendicular to the rearward direction.
- An electrical box has a hole configured to receive a fastener that fastens the box to the first side surface.
- the box defines a cavity that is isolated from the hole 20 by the box. The cavity is configured to contain electrical connections and to extend along the first side surface rearwardly beyond the hole and in the lateral direction beyond the hole.
- the box has a second hole configured to receive a second fastener that fastens the box to the second side surface of the joist.
- the cavity is further configured to extend along the second side surface rearwardly beyond the second hole and in the lateral direction beyond the second hole.
- FIGS. 1 and 2 are perspective views of an electrical box
- FIG. 3 is a sectioned perspective view of the box.
- FIG. 1 has parts that are examples of the elements recited in the claims.
- the apparatus thus includes examples of how a person of ordinary skill in the art can make and use the claimed invention. It is described here to meet the requirements of enablement and best mode without imposing limitations that are not recited in the claims.
- the apparatus includes a saddle-shaped electrical box 10 fastened to a ceiling joist 12 .
- the box 10 is configured to contain electrical connections for an electrical fixture, such as a light fixture or ceiling fan.
- the Joist 12 has a front surface 20 and first and second opposite side surfaces 21 and 22 .
- the side surfaces 20 and 22 extend in a rearward direction 30 from the front surface 20 and in a opposite first and second lateral directions 31 and 32 perpendicular to the rearward direction 30 .
- the box 10 is configured to be mounted on the joist 12 as shown in FIGS. 1 and 2 .
- the box 10 is a wall structure with several wall sections described as follows:
- a cylindrical side wall 40 is centered on an axis 35 and has a slight frustoconical taper, narrowing slightly in the rearward direction 30 .
- the cylindrical wall 40 is interrupted by two axially opposite flat side walls 42 , a U-shaped channel wall 44 , and four curved tab-framing walls 46 .
- the channel wall 44 includes a front panel 50 and first and second side panels 51 and 52 , respectively overlying the front surface 20 and first and second side surfaces 21 and 22 of the joist 12 .
- Four corner portions 54 of the side plates 51 and 52 define four tabs that are bounded by the respective tab-framing walls 46 .
- Each tab 54 and its adjoining tab-framing wall 56 define a recess 60 in the cylindrical wall 62 .
- the cylindrical, flat, U-shaped and tab-framing walls 40 , 42 , 44 and 46 comprise a “side wall”.
- the side wall is capped by a flat rear wall 62 that is divided by the channel 44 into two separate parts.
- An annular front edge 70 of the cylindrical wall 40 defines a front access opening 72 through which a user inserts fingers and tools into the box 10 to prepare the electrical connections.
- Each flat wall 42 has an annular groove 74 defining a knock-out 76 that can be removed to leave an opening for receiving an electrical conduit or fitting.
- the rear wall 62 has four cable clamps 80 for admitting electrical cables into the box 10 25 and clamping the cables in place.
- the channel's front panel 50 has a central hole 90 , centered on the axis 35 , through which a fastener 92 can be inserted to fasten the box 10 to the joist's front surface 20 .
- the channel's front panel 50 further has two side holes 94 , spaced symmetrically across the axis 35 from each other. They receive fasteners that fasten a bracket of the electrical fixture to the joist's front surface 20 while the bracket abuts the annular front edge 70 .
- Each tab 54 has a hole 101 or 102 30 through which a fastener 106 fastens the box 10 to a side surface 21 or 22 of the joist 12 .
- the side wall and the rear wall 62 together define a compartment 110 for containing the electrical connections between electrical supply cable and wires from the electrical fixture.
- the compartment 110 is U-shaped with three sections: A front section 120 extends along the front channel wall 50 and thus along the joist front surface 20 .
- First and second side sections 121 and 122 extend respectively along the first and second side panels 51 and 52 , and thus respectively along the joist's first and second side surfaces 21 and 22 .
- the compartment 110 is isolated from the four tabs 54 and their holes 101 and 102 by the four tab-framing walls 46 of the box 10 .
- the positions of the tabs 54 and their holes 101 and 102 have the following features that optimize support of the box 10 with efficient use of space. Since the first and second side compartment sections 121 and 122 are alike, the beneficial features can be described with reference to the first section 121 as follows.
- a rearmost point 130 of the compartment 121 is rearward from the tab holes 101 and 102 .
- a first lateral-most point 131 in the compartment 121 is laterally beyond the first tab hole 101 in the first lateral direction (arrow 31 ), and a second lateral-most point 132 in the compartment 121 is laterally beyond the second tab hole 102 in the opposite second lateral direction (arrow 32 ).
- First and second imaginary lines 201 and 202 extend parallel with and rearwardly beyond the inner surface 40 ′ of the cylindrical wall 40 . These lines 201 and 202 are not exactly parallel to each other, because the cylindrical wall 40 is slightly frustoconical. Similarly, third and fourth imaginary lines 203 and 204 extend parallel with and rearwardly beyond the outer surface 40 ′′ of the cylindrical wall 40 . These four imaginary lines 201 , 202 , 203 and 204 are located laterally beyond their adjacent tab holes 101 and 102 .
- Fifth and sixth imaginary lines 205 and 206 extend parallel with the inner surface 62 ′ of the rear wall 62 .
- seventh and eighth imaginary lines 207 and 208 extend parallel with the outer surface 62 ′′ of the rear wall 62 .
- These four imaginary lines 205 , 206 , 207 and 208 are located rearwardly beyond their adjacent tab holes 101 and 102 .
- Each tab 54 has a linear side edge 140 extending tangentially from the box's outer side surface 40 ′′ and a linear rear edge 262 extending tangentially from the box's rear surface 62 ′′.
- the tabs 54 do not extend laterally beyond the cylindrical side wall 40 nor rearwardly beyond the rear wall 62 .
Abstract
A joist has a front surface and first and second opposite side surfaces. The side surfaces extend in a rearward direction from the front surface. They also extend in a lateral direction perpendicular to the rearward direction. An electrical box has a hole configured to receive a fastener that fastens the box to the first side surface. The box defines a cavity that is isolated from the hole by the box. The cavity is configured to contain electrical connections and to extend along the first side surface rearwardly beyond the hole and in the lateral direction beyond the hole.
Description
- This application is a continuation of U.S. patent application Ser. No. 11/331,882, filed Jan. 13, 2006, which claims the benefit of U.S. Provisional Application No. 60/740,340, filed Nov. 29, 2005.
- This application relates to electrical boxes.
- An electrical box is used for connecting a ceiling fan or light fixture to a ceiling joist. The box is fastened to the joist and provides a compartment that contains electrical connections for the fan or fixture.
- A joist has a front surface and first and second opposite side surfaces. The side surfaces extend in a rearward direction from the front surface. They also extend in a lateral direction perpendicular to the rearward direction. An electrical box has a hole configured to receive a fastener that fastens the box to the first side surface. The box defines a cavity that is isolated from the
hole 20 by the box. The cavity is configured to contain electrical connections and to extend along the first side surface rearwardly beyond the hole and in the lateral direction beyond the hole. - Preferably, the box has a second hole configured to receive a second fastener that fastens the box to the second side surface of the joist. The cavity is further configured to extend along the second side surface rearwardly beyond the second hole and in the lateral direction beyond the second hole.
-
FIGS. 1 and 2 are perspective views of an electrical box; and -
FIG. 3 is a sectioned perspective view of the box. - The apparatus shown in
FIG. 1 has parts that are examples of the elements recited in the claims. The apparatus thus includes examples of how a person of ordinary skill in the art can make and use the claimed invention. It is described here to meet the requirements of enablement and best mode without imposing limitations that are not recited in the claims. - The apparatus includes a saddle-shaped
electrical box 10 fastened to aceiling joist 12. Thebox 10 is configured to contain electrical connections for an electrical fixture, such as a light fixture or ceiling fan. - The Joist 12 has a
front surface 20 and first and secondopposite side surfaces side surfaces rearward direction 30 from thefront surface 20 and in a opposite first and secondlateral directions rearward direction 30. Thebox 10 is configured to be mounted on thejoist 12 as shown inFIGS. 1 and 2 . - The
box 10 is a wall structure with several wall sections described as follows: Acylindrical side wall 40 is centered on anaxis 35 and has a slight frustoconical taper, narrowing slightly in therearward direction 30. Thecylindrical wall 40 is interrupted by two axially oppositeflat side walls 42, a U-shapedchannel wall 44, and four curved tab-framing walls 46. Thechannel wall 44 includes afront panel 50 and first andsecond side panels front surface 20 and first andsecond side surfaces joist 12. Fourcorner portions 54 of theside plates framing walls 46. Eachtab 54 and its adjoining tab-framing wall 56 define arecess 60 in thecylindrical wall 62. The cylindrical, flat, U-shaped and tab-framing walls rear wall 62 that is divided by thechannel 44 into two separate parts. - The walls described above have a variety of openings: An annular
front edge 70 of thecylindrical wall 40 defines a front access opening 72 through which a user inserts fingers and tools into thebox 10 to prepare the electrical connections. Eachflat wall 42 has anannular groove 74 defining a knock-out 76 that can be removed to leave an opening for receiving an electrical conduit or fitting. Therear wall 62 has fourcable clamps 80 for admitting electrical cables into thebox 10 25 and clamping the cables in place. The channel'sfront panel 50 has acentral hole 90, centered on theaxis 35, through which afastener 92 can be inserted to fasten thebox 10 to the joist'sfront surface 20. The channel'sfront panel 50 further has twoside holes 94, spaced symmetrically across theaxis 35 from each other. They receive fasteners that fasten a bracket of the electrical fixture to the joist'sfront surface 20 while the bracket abuts the annularfront edge 70. Eachtab 54 has ahole fastener 106 fastens thebox 10 to aside surface joist 12. - The side wall and the
rear wall 62 together define acompartment 110 for containing the electrical connections between electrical supply cable and wires from the electrical fixture. Thecompartment 110 is U-shaped with three sections: Afront section 120 extends along thefront channel wall 50 and thus along thejoist front surface 20. First andsecond side sections second side panels second side surfaces compartment 110 is isolated from the fourtabs 54 and theirholes framing walls 46 of thebox 10. - The positions of the
tabs 54 and theirholes box 10 with efficient use of space. Since the first and secondside compartment sections first section 121 as follows. - As shown in
FIG. 3 , arearmost point 130 of thecompartment 121 is rearward from thetab holes lateral-most point 131 in thecompartment 121 is laterally beyond thefirst tab hole 101 in the first lateral direction (arrow 31), and a secondlateral-most point 132 in thecompartment 121 is laterally beyond thesecond tab hole 102 in the opposite second lateral direction (arrow 32). - First and second
imaginary lines 201 and 202 extend parallel with and rearwardly beyond theinner surface 40′ of thecylindrical wall 40. Theselines 201 and 202 are not exactly parallel to each other, because thecylindrical wall 40 is slightly frustoconical. Similarly, third and fourthimaginary lines outer surface 40″ of thecylindrical wall 40. These fourimaginary lines adjacent tab holes - Fifth and sixth
imaginary lines inner surface 62′ of therear wall 62. Similarly, seventh and eighthimaginary lines outer surface 62″ of therear wall 62. These fourimaginary lines adjacent tab holes - Each
tab 54 has a linear side edge 140 extending tangentially from the box'souter side surface 40″ and a linear rear edge 262 extending tangentially from the box'srear surface 62″. Thetabs 54 do not extend laterally beyond thecylindrical side wall 40 nor rearwardly beyond therear wall 62. - This written description uses examples to disclose the invention, including best mode, and to enable any person skilled in the art to make and use the invention. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (10)
1. An apparatus for use with a joist having a front surface and first and second opposite side surfaces, the side surfaces extending in a rearward direction from the front surface and also in a lateral direction perpendicular to the rearward direction, the apparatus comprising:
an electrical box having a hole configured to receive a fastener that fastens the box to the first side surface of the joist, the box defining a cavity that is isolated from the hole by the box, the cavity being configured to contain electrical connections and to extend along the first side surface rearwardly beyond the hole and in the lateral direction beyond the hole.
2. The apparatus of claim 1 wherein the cavity is further configured to extend along the second side surface of the joist.
3. The apparatus of claim 1 wherein the box has a second hole configured to receive a second fastener that fastens the box to the second side surface of the joist.
4. The apparatus of claim 3 wherein the cavity is further configured to extend along the second side surface rearwardly beyond the second hole and in the lateral direction beyond the second hole.
5. An apparatus for use with a joist having a front surface and first and second opposite side surfaces, the side surfaces extending in a rearward direction from the front surface and also in a lateral direction perpendicular to the rearward direction, the apparatus comprising:
an electrical box having a hole configured to receive a fastener that fastens the box to the first side surface of the joist, and further having a side wall extending about and bounding a cavity and a rear wall rearwardly bounding the cavity, the cavity being isolated by the box from the hole and configured to contain electrical connections and to extend along both joist side surfaces of the joist, with the side wall extending in the lateral direction beyond the hole and the rear wall located rearwardly beyond the hole.
6. The apparatus of claim 5 wherein the cavity is configured to extend along the first side surface both rearwardly beyond the fastener hole and laterally beyond the fastener hole.
7. The apparatus of claim 5 wherein the box has a second hole configured to receive a second fastener that fastens the box to the second side surface of the joist.
8. An apparatus for use with a joist having a front surface and first and second opposite side surfaces, the side surfaces extending in a rearward direction from the front surface and also in a lateral direction perpendicular to the rearward direction, the apparatus comprising:
an electrical box having a side wall extending about and bounding a cavity that is configured to extend along both side surfaces of the joist and to contain electrical connections, the box further having, in a recess in the side wall, a hole that is isolated from the cavity by the box and configured to receive a fastener that fastens the box to the first side surface.
9. The apparatus of claim 8 wherein the recess is in a cylindrical section of the side wall.
10. The apparatus of claim 8 wherein the box further has, in a second recess in the side wall, a second hole that is isolated from the cavity by the box and configured to receive a second fastener that fastens the box to the second side surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/567,768 US20070137121A1 (en) | 2005-11-29 | 2006-12-07 | Electrical Box |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74034005P | 2005-11-29 | 2005-11-29 | |
US11/331,882 US7170015B1 (en) | 2005-11-29 | 2006-01-13 | Electrical box |
US11/567,768 US20070137121A1 (en) | 2005-11-29 | 2006-12-07 | Electrical Box |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/331,882 Continuation US7170015B1 (en) | 2005-11-29 | 2006-01-13 | Electrical box |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070137121A1 true US20070137121A1 (en) | 2007-06-21 |
Family
ID=37681865
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/331,882 Active US7170015B1 (en) | 2005-11-29 | 2006-01-13 | Electrical box |
US11/567,768 Abandoned US20070137121A1 (en) | 2005-11-29 | 2006-12-07 | Electrical Box |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/331,882 Active US7170015B1 (en) | 2005-11-29 | 2006-01-13 | Electrical box |
Country Status (2)
Country | Link |
---|---|
US (2) | US7170015B1 (en) |
CA (1) | CA2553180A1 (en) |
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US11221024B2 (en) * | 2019-04-10 | 2022-01-11 | Hubbell Incorporated | Ceiling fan brace assembly |
USD964944S1 (en) | 2019-11-20 | 2022-09-27 | Hubbell Incorporated | Adjustable fixture mounting assembly |
US11536029B2 (en) | 2019-11-20 | 2022-12-27 | Hubbell Incorporated | Adjustable electrical fixture mounting assembly |
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US8714506B2 (en) * | 2009-09-01 | 2014-05-06 | Hubbell Incorporated | Mounting assembly for electrical fixture |
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- 2006-12-07 US US11/567,768 patent/US20070137121A1/en not_active Abandoned
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11221024B2 (en) * | 2019-04-10 | 2022-01-11 | Hubbell Incorporated | Ceiling fan brace assembly |
USD964944S1 (en) | 2019-11-20 | 2022-09-27 | Hubbell Incorporated | Adjustable fixture mounting assembly |
US11536029B2 (en) | 2019-11-20 | 2022-12-27 | Hubbell Incorporated | Adjustable electrical fixture mounting assembly |
Also Published As
Publication number | Publication date |
---|---|
CA2553180A1 (en) | 2007-05-29 |
US7170015B1 (en) | 2007-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |