US2925236A - Hanger bars for electric outlet boxes - Google Patents
Hanger bars for electric outlet boxes Download PDFInfo
- Publication number
- US2925236A US2925236A US705025A US70502557A US2925236A US 2925236 A US2925236 A US 2925236A US 705025 A US705025 A US 705025A US 70502557 A US70502557 A US 70502557A US 2925236 A US2925236 A US 2925236A
- Authority
- US
- United States
- Prior art keywords
- box
- members
- bore
- opening
- carrier
- 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.)
- Expired - Lifetime
Links
- 230000000717 retained effect Effects 0.000 description 5
- 101100379079 Emericella variicolor andA gene Proteins 0.000 description 1
- 241000784303 Ochrosia compta Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
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
- Figure 1 is front elevation of a positioned hanger bar embodying our invention with an outlet box attached thereto; ⁇ t
- Figure 2 is a transverse section of the hanger bar on line II-II of Figure l;
- Figure 3 is a partial longitudinal section of the hanger bar on line III-III of Figure 2;
- Figure 4 is a perspective view of a box carrier, with guide prongs extending therefrom, adapted to tit in a hollow center portion of the hanger bar;
- Figures 5 and 6 are perspective views of two forms of box fasteners for holding an outlet box to the hanger bar.
- a hanger bar embodying our improved attaching device comprises a pair of hollow elongated telescopic members 1 equipped at their opposed ends with plates 2 for securing the members to oor joists 3 likewise the plates may be secured to wall studs. While telescopic members of rectangular cross section are easier to fabricate and are shown in the drawings, any suitable cross section may be used.
- Each of the telescopic members are longitudinally slotted along one face. ln a bar having a rectangular cross section these slots may be formed by turning toward each other the edges of a sheet of metal previously bent to form two sides perpendicular to the bottom. When the members are assembled the slots are aligned, thereby providing an opening 4 into the hollow center section of the members. In order that an outlet box may be located at any position between oor joists the opening will generally extend throughout the length of the telescopic members.
- a box carrier 5 is inserted in the hollow telescopic members and retained therein by shoulders 6 formed by the opposed sides of the members adjacent the opening 4.
- Guide prongs 7 extend from the box carrier through" the opening 4 in the members. These guidev prongs are spaced so as to automatically centerthe outlet box 8 when it is attached to the bar through a hole 9 in one side of the box, which holeis slightly larger indiameter than the distance between the outer surfaces of the guide prongs.
- the opposed faces 10 of the guide prongs are sloped inwardly toward the center of the box carrier andA the bore 11 provided in the box carrier. By this means the locking screw 12 is directed to the bore by the guide prongs.
- the box fastener 13 carrying the screw 12 has a rectangular cavity 14 which is adapted to it over the guide prongs.
- the cavity is constructed just slightly longer than the distance between the outer surfaces of the guide prongs.
- cavity is just slightly greater than the width of the guide prongs thereby preventing turning of the box fastener when the locking screw is being engaged.
- the outer periphery 15 of the box fastener extends over the periphery of the opening 9 in the outlet box and thereby holds the outlet box firmly between the box fastener and the hanger bar when the locking screw is fastened.
- the locking screw 12 extends through a bore in the box fastener, which bore is threaded with half threads so as to keep the screw and the box fastener together when they are not secured to the box carrier.
- the upper portion of-the shank 17 of the locking screw 12 is smooth, only a small portion of the end being threaded. By this means the screw may be slipped into engagement with the bore 11 in the box carrier without requiring turning until contact is made with that bore.
- Figures 5 and 6 show two different types of box fasteners which may be used.
- the box fastener shown in Figure 5 is provided with an externally threaded stud 16 extending therefrom.
- outlet box is placed over the guide prongs extending from the opening in the bar; the box fastener is placed over the guide prongs, automatically centering the bores in the box carrier and the box fastener.
- the screw can pivot in the bore.
- the sloping sides of the guide prongs will guide the screw into engagement with the bore in the box carrier.
- the telescoping members are attached to the joistsand the box carrier moved into the desired position.
- the outlet box is firmly held by tightening the screw.
- a hanger bar for electric outlet boxes said bar having a pair of hollow elongated telescopic members equipped at their opposed ends with means for securing the members to building joists or studs, improved means for securing an outlet box to the bar, said means comprising an elongated slot in each member said slots being aligned with each other so as to provide an elongated opening into the interior of the members, shoulders formed by the opposed sides of said opening, a box carrier adapted to fit in said members and retained therein by said shoulders, guide prongs extending from the box Patented Feb.
- said bar havV g a pair ofhollow elongated telescopic members equippedaftjtheir opposed ends with means for securing theA members to building joists or studs,'improved means for securing' ⁇ an outletbox to the bar, said means com# prising an ⁇ elon''gamteds'lot in each member said slots being alignedfwit'hfeach other so as to provide an elongated o" ng .into the Vinterior ofthe members, shoulders forme y theroppos'ed sides of said opening, a box carreradapted toiit in said members and retained therein by said shoulders, guide prongs extending from the box carrier ,through said openingrand adapted toextend throughr an opening in the outlet b ox, a box fastener adahtedjtoft over said guide prongs and the periphery ofthe opening in said boxV and
- ahanger bar for electric outlet boxes, said bar having a pair of hollow elongated telescopic members equipped attheir opposed ends with means for securing the members to building joists or studs, improved means for seciirinfg anV outlet box to the bar, said means comprising an elongated slotin each member said slots being aligned with each other so as to provide an elongated opening'into the ,interior of the members, shoulders fiornedby the opposed sides of said opening, a box carrier adapted to 'tin'saidhme'mbers' and retained therein bygsaid Shoulders and having a centrally positioned e'aded bore,V guide prongs extending from thel box rter through saidv opening and adapted to extend ofughin OPi-vl'ng'in the outlet box,y aAbox fastener havig acavty adapted to fit over said guide prongs and said "spaanse s f"
- said box fastener being ofA suicient size to extend overk the periphery of the equipped at their opposed ends with means ⁇ for Securing the members to building joists or studs, improved means for securing an outlet box to the bar, saidv means comprising an elongated slotin each member said slots being aligned with each other so as to provide an elongated opening into the interior of the members, shoulders formed by the opposed sides of said opening, a box carrier adapted V,tor fit infsaid members ,and retained ⁇ therein by Vsaid shouldersV andV having va.
- guide prongs extending from the box carrier Vthrough said openfv ing and adapted to extend through an opening Vin ythe ontletV box, the opposed vfaces of said guide prongs. being angled tovvard the bore in the box carrier, a box fastener provided with a bore adapted tofit over saidy guide prongs and the periphery ofthe 'opening in the box andtlereby hold the box firmly betweensaid members and said box fastener, and a screw adaptedv to engage said bores to se'f cure the box fastener to the box carrier, said screw being directed toward the bore in the box carrier by the angled faces of the guide prongs.
Description
Feb. 16, 1960 R. D. cooK ET AL 2,925,236
HANGER BARS FOR ELECTRIC OUTLET BoxEs Filed Dec. 24, 1957 INVENTORS. Raymond VD. Cook William A. Lang THEIR A TTORNEYS United States Patent O 2,925,236 HANGER BARS FOR ELECTRIC OUTLET BOXES Raymond D. Cook and William A. Lang, Pittsburgh, Pa., assignors to Steel `City Electric Company, Pittsburgh, Pa., a corporation of Pennsylvania Application December 24, 1957, Serial No. 705,025 Y 4 Claims. (Cl. 248-276) This invention relates to hanger bars for electric outlet boxes, more particularly to an improved device for attaching `the outlet box to the hanger bar. t
Due to the increasing cost of building construction any device which simplifies existing installation procedures, thereby reducing labor costs, is a very valuable advance. Our invention accomplishes this result, providing a hanger` bar which is easy to construct and simple to install. The prior art shows hanger bars which are diicult to" assemble, requiring a workman to make several adjustments and alignments. Our invention eliminates most ofthis diiculty. It discloses a hanger bar to which an outlet box can be attached by simply tightening one screw. The construction of the attaching mechanism automatically aligns this screw with its bore and directs the screw to the bore. v,
We have shown a preferred embodiment of our invention in the accompanying drawings, in which:
Figure 1 is front elevation of a positioned hanger bar embodying our invention with an outlet box attached thereto;` t
Figure 2 is a transverse section of the hanger bar on line II-II of Figure l;
Figure 3 is a partial longitudinal section of the hanger bar on line III-III of Figure 2;
Figure 4 is a perspective view of a box carrier, with guide prongs extending therefrom, adapted to tit in a hollow center portion of the hanger bar; and
Figures 5 and 6 are perspective views of two forms of box fasteners for holding an outlet box to the hanger bar.
More particularly, a hanger bar embodying our improved attaching device comprises a pair of hollow elongated telescopic members 1 equipped at their opposed ends with plates 2 for securing the members to oor joists 3 likewise the plates may be secured to wall studs. While telescopic members of rectangular cross section are easier to fabricate and are shown in the drawings, any suitable cross section may be used.
Each of the telescopic members are longitudinally slotted along one face. ln a bar having a rectangular cross section these slots may be formed by turning toward each other the edges of a sheet of metal previously bent to form two sides perpendicular to the bottom. When the members are assembled the slots are aligned, thereby providing an opening 4 into the hollow center section of the members. In order that an outlet box may be located at any position between oor joists the opening will generally extend throughout the length of the telescopic members.
A box carrier 5 is inserted in the hollow telescopic members and retained therein by shoulders 6 formed by the opposed sides of the members adjacent the opening 4. By constructing the box carrier nearly as Wide as the hollow center portion of the members and slightly longer than that dimension, sidewise turning of the box carrier is prevented; thus while the box carrier is free to move lengthwise in the members, it will not move side- ICC I wise or turn when a locking screw 12 in :a box fastener 13 is inserted in a bore 11 in the box carrier.
Guide prongs 7 extend from the box carrier through" the opening 4 in the members. These guidev prongs are spaced so as to automatically centerthe outlet box 8 when it is attached to the bar through a hole 9 in one side of the box, which holeis slightly larger indiameter than the distance between the outer surfaces of the guide prongs. The opposed faces 10 of the guide prongs are sloped inwardly toward the center of the box carrier andA the bore 11 provided in the box carrier. By this means the locking screw 12 is directed to the bore by the guide prongs.
The box fastener 13 carrying the screw 12 has a rectangular cavity 14 which is adapted to it over the guide prongs. The cavity is constructed just slightly longer than the distance between the outer surfaces of the guide prongs. Thus when the box fastener is pla'ced over the guide prongs it takes a position with respect to the box carrier which automatically aligns the locking screw 12 with the bore 11 in the box carrier. cavity is just slightly greater than the width of the guide prongs thereby preventing turning of the box fastener when the locking screw is being engaged. The outer periphery 15 of the box fastener extends over the periphery of the opening 9 in the outlet box and thereby holds the outlet box firmly between the box fastener and the hanger bar when the locking screw is fastened.
The locking screw 12 extends through a bore in the box fastener, which bore is threaded with half threads so as to keep the screw and the box fastener together when they are not secured to the box carrier. The upper portion of-the shank 17 of the locking screw 12 is smooth, only a small portion of the end being threaded. By this means the screw may be slipped into engagement with the bore 11 in the box carrier without requiring turning until contact is made with that bore.
Figures 5 and 6 show two different types of box fasteners which may be used. The box fastener shown in Figure 5 is provided with an externally threaded stud 16 extending therefrom.
It will be seen that our invention makes the installation of outlet boxes much easier than has heretofore been possible. The outlet box is placed over the guide prongs extending from the opening in the bar; the box fastener is placed over the guide prongs, automatically centering the bores in the box carrier and the box fastener. In certain instances, there may be such clearance between the smooth portion of the shank 17 and the bore in the box fastener that the screw can pivot in the bore. In such instances, the sloping sides of the guide prongs will guide the screw into engagement with the bore in the box carrier. Then the telescoping members are attached to the joistsand the box carrier moved into the desired position. The outlet box is firmly held by tightening the screw.
While we have described a present preferred embodiment of our invention, it is to be understood that it may be otherwise embodied within the scope of the appended claims.
We claim:
l. In a hanger bar for electric outlet boxes, said bar having a pair of hollow elongated telescopic members equipped at their opposed ends with means for securing the members to building joists or studs, improved means for securing an outlet box to the bar, said means comprising an elongated slot in each member said slots being aligned with each other so as to provide an elongated opening into the interior of the members, shoulders formed by the opposed sides of said opening, a box carrier adapted to fit in said members and retained therein by said shoulders, guide prongs extending from the box Patented Feb. 16, 1960 The width of the` carrier tlir'ug'li s''d opening and adapted to extend through" anV opening in the outlet box, a box fastener adapted to fit over said guide prongs and the periphery oftheopenins inthe boxandthereby hold the box rmlyv between said 'embers Aand said box fastener, and means to secure the box fastenermto'mthe boxrcarrier.V
'2 Ina hanger blarfor electric outlet boxes, said bar havV g a pair ofhollow elongated telescopic members equippedaftjtheir opposed ends with means for securing theA members to building joists or studs,'improved means for securing'` an outletbox to the bar, said means com# prising an `elon''gamteds'lot in each member said slots being alignedfwit'hfeach other so as to provide an elongated o" ng .into the Vinterior ofthe members, shoulders forme y theroppos'ed sides of said opening, a box carreradapted toiit in said members and retained therein by said shoulders, guide prongs extending from the box carrier ,through said openingrand adapted toextend throughr an opening in the outlet b ox, a box fastener adahtedjtoft over said guide prongs and the periphery ofthe opening in said boxV and thereby hold the box firmly` between said members and said box fastener, an externally threaded `stud extending from said box fastener for: supporting fixtures and means to secure the box fastener tothe box carrier.
In ahanger bar ,for electric outlet boxes, said bar having a pair of hollow elongated telescopic members equipped attheir opposed ends with means for securing the members to building joists or studs, improved means for seciirinfg anV outlet box to the bar, said means comprising an elongated slotin each member said slots being aligned with each other so as to provide an elongated opening'into the ,interior of the members, shoulders fiornedby the opposed sides of said opening, a box carrier adapted to 'tin'saidhme'mbers' and retained therein bygsaid Shoulders and having a centrally positioned e'aded bore,V guide prongs extending from thel box rter through saidv opening and adapted to extend ofughin OPi-vl'ng'in the outlet box,y aAbox fastener havig acavty adapted to fit over said guide prongs and said "spaanse s f" ,a I
centrally positioned threaded bore, said box fastener being ofA suicient size to extend overk the periphery of the equipped at their opposed ends with means `for Securing the members to building joists or studs, improved means for securing an outlet box to the bar, saidv means comprising an elongated slotin each member said slots being aligned with each other so as to provide an elongated opening into the interior of the members, shoulders formed by the opposed sides of said opening, a box carrier adapted V,tor fit infsaid members ,and retained `therein by Vsaid shouldersV andV having va. threaded bore, guide prongs extending from the box carrier Vthrough said openfv ing and adapted to extend through an opening Vin ythe ontletV box, the opposed vfaces of said guide prongs. being angled tovvard the bore in the box carrier, a box fastener provided with a bore adapted tofit over saidy guide prongs and the periphery ofthe 'opening in the box andtlereby hold the box firmly betweensaid members and said box fastener, and a screw adaptedv to engage said bores to se'f cure the box fastener to the box carrier, said screw being directed toward the bore in the box carrier by the angled faces of the guide prongs.
References Cited in the file of this patent UNITED STATES PATENTS
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US705025A US2925236A (en) | 1957-12-24 | 1957-12-24 | Hanger bars for electric outlet boxes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US705025A US2925236A (en) | 1957-12-24 | 1957-12-24 | Hanger bars for electric outlet boxes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2925236A true US2925236A (en) | 1960-02-16 |
Family
ID=24831755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US705025A Expired - Lifetime US2925236A (en) | 1957-12-24 | 1957-12-24 | Hanger bars for electric outlet boxes |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2925236A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039135A (en) * | 1976-01-19 | 1977-08-02 | Dzus Fastener Co., Inc. | Coupling device |
| US4244501A (en) * | 1979-01-18 | 1981-01-13 | Four Star Corporation | Slidable bracket for luggage rack |
| US5085393A (en) * | 1990-07-24 | 1992-02-04 | Ryan Patrick V | Hanger assembly method and apparatus |
| US5934631A (en) * | 1996-08-19 | 1999-08-10 | Thomas & Betts Corporation | Hanger bar assembly |
| US6098945A (en) * | 1998-03-19 | 2000-08-08 | Hubbell Incorporated | Mounting bracket and supporting brace |
| US6461016B1 (en) | 2000-10-25 | 2002-10-08 | Hubbell Incorporated | Adjustable recessed downlight |
| US6519791B2 (en) | 2001-07-03 | 2003-02-18 | Securus, Inc. | Stub-out bar |
| US6653562B2 (en) | 2001-10-18 | 2003-11-25 | Pent Products, Inc. | Portable electrical unit |
| US6784364B2 (en) | 2001-10-18 | 2004-08-31 | Pent Technologies, Inc. | Portable office storage unit |
| US6889943B2 (en) | 2001-07-06 | 2005-05-10 | Thomas & Betts International, Inc. | Hanger bar assembly |
| US20060261225A1 (en) * | 2005-05-23 | 2006-11-23 | Dore Kevin P | Mount for attaching a portable fan to a recreational vehicle awning |
| US20080179481A1 (en) * | 2007-01-31 | 2008-07-31 | Thomas & Betts International, Inc. | Adjustable electrical box hanger bar assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1646431A (en) * | 1921-09-10 | 1927-10-25 | John Edward Ogden | Bolt anchor |
| US2260829A (en) * | 1939-11-30 | 1941-10-28 | Gen Electric | Box supporting device |
| US2729414A (en) * | 1952-10-28 | 1956-01-03 | Gen Electric | Bar hanger fixture for outlet boxes |
| US2788188A (en) * | 1948-07-07 | 1957-04-09 | Maier William | Electrical outlet fixtures |
-
1957
- 1957-12-24 US US705025A patent/US2925236A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1646431A (en) * | 1921-09-10 | 1927-10-25 | John Edward Ogden | Bolt anchor |
| US2260829A (en) * | 1939-11-30 | 1941-10-28 | Gen Electric | Box supporting device |
| US2788188A (en) * | 1948-07-07 | 1957-04-09 | Maier William | Electrical outlet fixtures |
| US2729414A (en) * | 1952-10-28 | 1956-01-03 | Gen Electric | Bar hanger fixture for outlet boxes |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039135A (en) * | 1976-01-19 | 1977-08-02 | Dzus Fastener Co., Inc. | Coupling device |
| US4244501A (en) * | 1979-01-18 | 1981-01-13 | Four Star Corporation | Slidable bracket for luggage rack |
| US5085393A (en) * | 1990-07-24 | 1992-02-04 | Ryan Patrick V | Hanger assembly method and apparatus |
| US5934631A (en) * | 1996-08-19 | 1999-08-10 | Thomas & Betts Corporation | Hanger bar assembly |
| US6098945A (en) * | 1998-03-19 | 2000-08-08 | Hubbell Incorporated | Mounting bracket and supporting brace |
| US6332597B1 (en) | 1998-03-19 | 2001-12-25 | Hubbell Incorporated | Mounting bracket and supporting brace |
| US6461016B1 (en) | 2000-10-25 | 2002-10-08 | Hubbell Incorporated | Adjustable recessed downlight |
| US6519791B2 (en) | 2001-07-03 | 2003-02-18 | Securus, Inc. | Stub-out bar |
| US6889943B2 (en) | 2001-07-06 | 2005-05-10 | Thomas & Betts International, Inc. | Hanger bar assembly |
| US6653562B2 (en) | 2001-10-18 | 2003-11-25 | Pent Products, Inc. | Portable electrical unit |
| US6784364B2 (en) | 2001-10-18 | 2004-08-31 | Pent Technologies, Inc. | Portable office storage unit |
| US20060261225A1 (en) * | 2005-05-23 | 2006-11-23 | Dore Kevin P | Mount for attaching a portable fan to a recreational vehicle awning |
| US20080179481A1 (en) * | 2007-01-31 | 2008-07-31 | Thomas & Betts International, Inc. | Adjustable electrical box hanger bar assembly |
| US7857275B2 (en) | 2007-01-31 | 2010-12-28 | Thomas & Betts International, Inc. | Adjustable electrical box hanger bar assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3104087A (en) | Means for supporting electrical fixtures | |
| US2925236A (en) | Hanger bars for electric outlet boxes | |
| US2758810A (en) | Outlet boxes and fixture studs | |
| US9285074B2 (en) | Mounting brace assembly for mounting an electrical box | |
| US2930564A (en) | Fixture support for hung ceilings | |
| US2880949A (en) | Conduit support assembly | |
| US2909054A (en) | Anchor for securing accessories to concrete and the like | |
| US2345650A (en) | Skeletonized structure | |
| US3686805A (en) | Assemblies for mounting panels on walls | |
| US3208560A (en) | Self-aligning lockable head assembly for pipe hanger inserts | |
| US2631809A (en) | Furring hanger | |
| US2632620A (en) | Bracket for hanging fixtures | |
| US2820613A (en) | Balustrades | |
| US2804180A (en) | Cage nut | |
| US2624386A (en) | Driven nut | |
| US2982508A (en) | Adjustable anchor | |
| US2299696A (en) | Outlet box | |
| US6278058B1 (en) | Electrical box and box assembly | |
| US2964276A (en) | Fixture support | |
| US4888879A (en) | Electrical junction box installer | |
| US2314408A (en) | Outlet box installation | |
| US1782791A (en) | Adjustable fixture strap | |
| US3011047A (en) | Leveling means for illuminator | |
| US2357171A (en) | Bus bar connecting clamp | |
| US2126259A (en) | Outlet box |