MXPA06011128A - Integral nail bar hanger for recessed luminaire - Google Patents

Abstract

A bar hanger assembly is provided for supporting a recessed electrical device in a ceiling support. The bar hanger includes first and second telescoping support arms that are slidably connected together for adjusting the length of the bar hanger. The support arms having an elongated body with first and second ends and a mounting plate coupled to the first end. The mounting plate is oriented substantially perpendicular to the plane of the body. An attachment member is coupled to a bottom edge of the mounting plate for attaching to the bottomedge of a ceiling joist. The attachment member includes a detent extending from one side thereof. The attachment member can be bent from a first position perpendicular to the mounting plate to a second position parallel to the mounting plate for attaching to a T-bar support.

Description

PENDANT OF NAIL BAR INTEGRAL FOR A LUMINAIRE EMBUTIDA FIELD OF THE INVENTION The present invention is directed to a bar pendant for supporting a recessed luminaire and lighting fixtures to the ceiling joists and to a T-bar support of a suspended ceiling. The invention is directed, in particular, to a bar pendant which can be adapted to be mounted, either to a ceiling joist or to a T-bar support of a suspended ceiling.

BACKGROUND OF THE INVENTION Embedded luminaires and lighting fixtures for installation in wooden constructions typically include bar hangers that engage the luminaire and include mounting ends to adhere them to the adjacent roof joists. Bar hangers, commonly include a serrated nailer or hooks that are integrally formed from the smooth material of the bar pendant. The upper part of the bar pendant is located against the joist and a hammer is used to drive the nailer into the wood to fix the bar pendant to the joist. Once the nailer is driven into the joists, the wood and nailer are permanently deformed and not easily removed. This limits the ability to adjust the position of the bar pendant and the luminaire, once attached to the roof joist. Generally, a secondary fastener, such as a nail or screw is added by the installer to ensure that the bar pendant is firmly mounted to the ceiling joist. Several support devices have been developed to support the luminaires and other lighting fixtures on the ceilings. The support devices can be a conventional bar suspension to adhere to the ceiling joists or to adhere to a T-bar support rail for suspended ceilings. Bar hangers generally include a two-piece assembly that has a pair of rails that connect together in a sliding manner. The rails can be extended or retracted to secure them between the adjacent roof rafters. An example of a rod hanger bracket for an inlay lighting fixture is described in US Patent No. 5,505,419 to Gabrius. In this device, the end portion of the bar pendant is provided with a bridge that holds a nail to adhere the bar pendant to the ceiling joist. A similar device is also described in US Patent No. 5,222,800 to Chan et al. Other lighting fixtures and lighting fixtures are able to adhere to the ceiling joists or to a T-bar of a suspended ceiling. For example, U.S. Patent No. 5,957,574 to Hantz et al. describes a lighting assembly that has adjustable nail plates at each end. A corner is formed at the edge of the structure to be mounted to a T-bar support. A similar device is also described in US Patent No. 6,004,011 to Sieczkowski. Although the bar pen supports indicated above are generally suitable for their intended use, there is a continuing need to improve the support members.

COMPENDIUM OF THE INVENTION The present invention is directed to an assembly of a bar pendant for supporting a recessed luminaire and lighting fixtures. The invention is particularly directed to an assembly of a bar suspension that can be mounted to a ceiling joist or to a T-bar support of a suspended ceiling. The bar pendant of the invention is suitable for use in electrical mounting devices such as a lighting fixture to be embedded in a ceiling. The bar pendant includes sliding arms to adjust the length of the bar pendant assembly to be placed between the adjacent joists. The ends of the arm include a mounting plate to adhere to the side surfaces of the roof joist. An adhesion tab extends from the mounting plate along the lower edge that is located along the lower edge of the roof joist to locate the bar pendant at a predetermined distance from the lower edge of the ceiling joist . Another aspect of the invention is to provide an assembly of a bar pendant that can be modified for use witheither ceiling joists or a T-bar support for a suspended ceiling. In one embodiment, the bar pendant includes a catch member or hook type for attaching the bar pendant to the T-bar bracket. A further aspect of the invention is to provide an assembly of a bar pendant having a lug that can adhere to the lower surface of a roof joist where the lug can be bent into a position to adhere to a T-bar support. A further aspect of the invention is to provide an assembly of a bar pendant having a lug that can adhere to a ceiling joist and can be bent to a different position to be coupled with a T-bar bracket.

The various aspects of the invention are achieved, basically, by providing a bar pendant to hold an electrical device embedded in a ceiling support. The bar pendant has first and second telescopic support arms that are slidably connected to each other. Each support arm comprises an elongated support body having a first end and a second end. A mounting plate engages the first end of the body and extends substantially perpendicular to a plane of the support body. The mounting plate has at least one opening for receiving a fastener. An adhesion member is coupled to a lower edge of the mounting plate along the fold line. The adhesion member has a substantially flat first side and a second opposing side, and a retainer extending from the second side. The adhesion member can be bent from a first position where the adhesion plate extends substantially perpendicular to the mounting plate to contact a lower surface of a ceiling joist to a second position substantially parallel to the mounting plate to adhere it to a T-bar support. Aspects of the invention are further achieved by providing a bar pendant for holding an electrical device embedded in a ceiling support. The bar pendant has first and second telescopic support arms coupled together for slidable movement in a longitudinal direction. Each support arm comprises a support body having a longitudinal dimension with a first end, a second end, an upper edge and a lower edge. The lower edge has a corner at the first end with a dimension to receive a support of the T-bar. A mounting plate is coupled to the first end of the support body and extends substantially perpendicular to a plane of the support body. The mounting plate has at least one opening for receiving a fastener for adhering the mounting plate to a ceiling joist. A first adhesion member and a second adhesion member engage a lower edge of the mounting plate and extend in a direction substantially perpendicular to the mounting plate to adhere it to a lower side of a ceiling joist. The first adhesion member has a retainer extending in a direction from a lower side where the first adhesion member can be bent from a first position perpendicular to the mounting plate to a second position substantially parallel to the mounting plate to make contact with a lower surface of the T-bar support. The aspects of the invention are also achieved by providing a bar pendant for holding an embedded electrical device. The bar pendant has first and second telescopic support arms coupled together for slidable movement in a longitudinal direction. Each support arm comprises a support body having a longitudinal dimension with a first end, a second end, an upper edge and a lower edge. A mounting plate engages the first end of the support body and extends in a direction substantially perpendicular to the longitudinal dimension of the support body. An adhesion member extends from a lower edge of the mounting plate to contact a lower edge of a ceiling joist. The mounting plate has an opening for receiving a fastener and a raised bridge integrally formed with the mounting plate and has a central portion spaced apart from the mounting plate to define a hole between the central portion and the mounting plate. A fastener extends through it and attaches to the bridge. The bridge has a longitudinal dimension extending at an acute angle with respect to a plane of the adhesion member to allow a tool to be inserted into the hole and to leverage against the ceiling joist. These and other aspects of the invention will become apparent from the detailed description below and the appended drawings describing various embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The following is a detailed description of the drawings in which: Figure 1 is a perspective view of a bar pendant in a first embodiment of the invention showing the bar pendant adhered to a bar joist. roof and a support of the T-bar; Figure 2 is an exploded perspective view of the bar pendant of Figure 1; Figure 3 is a perspective view of the mounting end of the bar pendant; Figure 4 is a perspective view of an internal face of the mounting plate of the bar pendant; Figure 5 is a side view of the mounting plate of the bar pendant showing a bridge of nails; Figure 6 is an elevation view showing a tool inserted in the bridge to remove a fastener; Figure 7 is a perspective view showing a tool inserted in the hole of the coupling lug to bend the coupling lug; Figure 8 is a perspective view showing the coupling lug folded in a second position; Figure 9 is a perspective view showing the mounting end of the bar pendant coupled to a support of the T-bar; Figure 10 is a side elevational view showing the bar pendant mounted on a support of the T-bar; Figure 11 is a top view showing two adjacent bar hangers coupled together; Figure 12 is a perspective view of a bar pendant in a second embodiment of the invention; Figure 13 is a perspective view of an internal face of the mounting plate of the bar pendant of Figure 12; Figure 14 is a perspective view of the internal face of the mounting plate having a removable lug separate from the mounting plate; Figure 15 is a perspective view showing the body of a bar pendant extending through an opening formed in the mounting plate of the bar pendant; Figure 16 is a perspective view of a bar pendant in a third embodiment of the invention; Figure 17 is a side elevation view showing the bar pendant of Figure 16 mounted to a ceiling joist; Figure 18 is a perspective view showing a coupling lug folded in a position for engaging a T-bar pendant; Figure 19 is a perspective view showing the assembly of the bar pendant mounted on a support of the T-bar; Figure 20 is a perspective end view showing the bar pendant adhered to a support of the T-bar; Figure 21 is a side elevation view showing the bar pendant adhered to a T-bar support; Figure 22 is a perspective view showing the end of the bar pendant with the adhesion tab removed; Figure 23 is a perspective view showing the bar pendant adhered to a support of the T-bar; and Figure 24 is a side elevation view showing the bar pendant adhered to a T-bar support.

DETAILED DESCRIPTION OF THE INVENTION The present disclosure is directed to a bar pendant for holding an embedded electrical device, such as a luminaire and a lighting fixture, to the ceiling joists or the T-bar of a suspended ceiling. The invention is particularly directed to a bar suspension that can be mounted, either to a conventional ceiling joist or to a T-bar of a suspended ceiling. With reference to the drawings, the invention in one embodiment is directed to a bar pendant 10 for holding an electrical device. In the illustrated embodiments, the electrical device is a recessed luminaire and a lighting fixture 12 that adhere to a support member 14. The support member 14 adheres to the bar pendant 10 to locate a lighting fixture 12 in an embossed position with respect to the ceiling. As shown in Figure 1, the support member 14 is adhered to a pair of bar hangers 10, with each bar pendant 10 extending between the ceiling joists. In the embodiment of Figures 1-11, the bar pendant 10 includes support arms 16 which are coupled together in a displaceable shape so that the length of the bar pendant 10 can be adjusted to the appropriate width between the ceiling joists. The support arms 16 have a longitudinal dimension and have a longitudinal channel 18 to allow each support arm 16 to slide with respect to each other. In this embodiment, the channel 18 includes an elongated slot 20 for receiving a coupling member 22 for engaging the support arms together while allowing a longitudinal slidable movement. In other embodiments, the support arm can be constructed in a telescopic arrangement where an arm forms a channel so that the support arm slides into the channel. The coupling member 22 includes a pair of lugs 24 having raised upper portions 26 that are inserted through the slots 22 to engage the support arms 16 together. The support arms 16 have a first end 28 and a second end 30 with an upper edge 32 and a lower edge 34. As shown in Figure 3, the lower edge 34 has a notch formed in the first end 28. As discussed hereafter, the notch 36 has a dimension to receive a T-bar support commonly used in suspended ceilings. so that the bar pendant can adhere to and be suspended by a support of the roof of the T-bar. In one embodiment, the support arm 16 includes a plurality of incision lines 38 spaced apart with openings. The incision lines 38 are preferably spaced apart to reduce the longitudinal length of the bar pendant 10 when it needs to be placed between narrow ceiling joists. With reference to Figures 3-6, a mounting plate 40 engages a first end 28 of the support arm 16 for attaching a bar pendant 10 to a roof joist or other vertical support. Preferably, the mounting plate 40 is formed integrally with a support arm 16 and is bent substantially 90 ° with respect to the plane of the support arm 16. In the embodiment shown, a raised area 42 is formed by extending from the first end 28 of the support arm 16 and along the mounting plate 40 to reinforce the corner portion of the connection between the mounting plate 40 and the support arm 16. The raised area 42 projects outward from the nail surface of the mounting plate 40 so as not to interfere with the adhesion member of the bar pendant to the joist. The mounting plate 40 has a dimension for adhering to a ceiling joist and includes one or more holes 44 for receiving a fastener (not shown) for permanently adhering the mounting plate 40 and the support arm to the ceiling joist. The mounting plate 40 has an outer face 46 for contacting the roof joist and an opposite inner face 48. As shown in Figure 4, a relief cut forms a bridge 50 extending from the inner face 48. In the illustrated embodiment, the bridge 50 includes a pair of uprights 52 extending from the mounting plate 40 to a central portion 54. In one embodiment, the central portion 54 and the uprights 52 of the bridge 50 form a curved arch shape. Preferably, the bridge 50 is integrally formed with a mounting plate 40 and cut and perforated from the material of the mounting plate 40. The central portion 54 is separated from the plane of the inner face 48 of the mounting plate 40 to form a hole 56. The raised central portion 54 includes an opening 58 centrally located for receiving a fastener 60. Preferably, the opening 58 has a internal dimension for capturing the fastener 60 so that the fastener 60 continues to be coupled to the bridge 50 during assembly. As shown in Figure 5, the fastener 60 is initially inserted into the opening 58 at a distance to be captured by the opening 58 without extending beyond the mounting plate 40. In the preferred embodiments, the bridge 50 is formed in a diagonal with respect to the longitudinal dimension of the mounting plate 40 and at an acute angle with respect to the lower edge 62 of the mounting plate 40. The hole 56 has a dimension and is oriented in a position so that a tool, such as a nail hammer 64 split as shown in Figure 6, can be inserted into the hole for prying against the ceiling joist or other surface of support to allow the support plate 40 to be removed from a ceiling joist. Preferably, the bridge 50 is oriented so that the worker can easily insert the nail of a hammer or other tool into the hole and make sufficient leverage to remove the bar pendant. In one embodiment, the bridge is oriented at an angle of approximately 45 degrees with respect to the lower edge of the mounting plate 40. An adhesion member 66 is coupled to the assembly 40 as shown in Figure 3. The adhesion member 66 has a substantially planar configuration and extends in a direction perpendicular to the external face 46 of the mounting plate 40 along the edge 62 lower. Preferably, the adhesion member 66 has a dimension for contacting a lower face of a ceiling joist to locate the bar pendant 10 and the associated lighting device 12 in an appropriate position with respect to the roof and the ceiling joist . In this way, the adhesion member 66 serves as an alignment lug. In the embodiment of Figures 1-11, the adhesion member 66 includes a first adhesion lug 68 and a second adhesion lug 70. The first adhesion tab 68 has a substantially rectangular configuration and is adhered to the mounting plate 40 along the lower edge 62 by a fold line 72. The first adhesion lug 68 includes a circular cut-out 74 with an opening 76. The ends of the central portion 74 are formed with detents or hooks in the form of coupling lugs 78 that are bent in one direction, generally downwardly in a slope with respect to the plane of the central portion 74 with respect to the orientation shown in Figure 3. The engagement lugs 78 have a straight edge 80 and an arched edge 72 extending from the straight edge 80 to a side edge 84 outside of the central portion 74. A second adhesion lug 70 has a generally U-shaped configuration surrounding the first adhesion lug 68. The second adhesion lug 70 includes a pair of uprights 86 coupled to the lower edge 62 of the mounting plate 40 and a portion 88 of the main body extending between the uprights 66. The portion 88 of the body in the illustrated embodiment has a hole 90 circular to receive a fastener and an elongated hole 92. The elongated hole 92 is provided to allow adjustment and positioning of the hanging bar 10 with respect to the ceiling joist. In use, the bar pendant 10 is adhered to the lighting fixture 12 and the resulting assembly is located between the ceiling joists or the ceiling supports. The bar pendant 10 can be adapted to be mounted on a standard ceiling joist or a T-bar bracket for suspended ceilings. As shown in Figure 1, a bar pendant 10 adheres to a beam 94 of the standard roof by locating the bar pendant 10 so that the bonding member 66 is joined to a lower edge of the roof joist 94 and the mounting plate 40 is joined to a side surface of the beam 94 of the roof. The adhesion member 66 aligns and locates the support arm 16 with respect to a lower edge of the roof joist 94 so that the lighting fixture 12 is crimped at a correct distance from the ceiling. Typically, the lighting fixture 12 is embedded at a distance with respect to the roof material that adheres to the beam 94 of the roof. The bar pendant 10 can be mounted between a pair of spaced apart ceiling beams 94. The bar pendant 10 is located in the desired location and the fastener 60 is hammered to penetrate the ceiling joist 94 to hold the bar pendant 10 in the desired position. In case an additional adjustment is needed, a split nail hammer or other lever tool can be inserted into the hole under the bridge 50, so that the fastener 60 can be removed to relocate the bar pendant 10. As shown in Figure 6, the lever tool can be inserted under the bridge 50 in a direction substantially parallel to the lower edge of the roof joist 94 so that the roof joist can be prized to remove the fastener 60. Alternatively, the bar pendant can be mounted to the ceiling joists by locating the bar pendant and adhering it with fasteners extending through the elongated slot 92. This provides some adjustment to the bar pendant to a desired position. The fastener captured by the bridge can then be hammered into the joist. Generally, additional fasteners are added to secure the bar pendant in place. The bar pendant 10 is also adapted to be mounted directly on a bracket 96 of the T-bar roof as shown in Figures 1, 9 and 10. In the illustrated embodiment, the T-bar bracket 96 is a support for a standard ceiling for suspended roof tiles and includes a body portion 98 with an upper reinforcing edge 100 and projections 102 extending outwardly along the lower edge to hold the roof tiles. The upper edge 100 typically has an enlarged portion defining a longitudinal channel. In the embodiment shown, the upper edge 100 of the T-bar supports has hollow channels with inclined upper surfaces and a flat lower edge extending perpendicular to the plane of the body 98 to define a flange 106. The bar pendant 10 adapted to be mounted directly to a T-bar support 96 by folding the first adhesion tab 68 from the position perpendicular to the plane of the mounting plate 40 to a position substantially parallel to the mounting plate 40 as shown in Figure 8 The opening 76 in the first adhesion lug 68 has a dimension for receiving a tool such as a screwdriver 104 for bending the attachment lug 68 to the position shown in Figure 8. A cutout 77 is provided along the line of bending between the adhesion plate 68 and the mounting plate 40 to assist in the bending. In the position shown in Figure 8, the first adhesion lug 68 is oriented so that the engagement lugs 78 extend inwardly relative to the interior face 48 of the mounting plate 40. The bar pendant 10 is mounted to the support of the T-bar by locating the upper edge 100 of the support 96 of the T-bar within the notch in the support arm 16. As shown in Figure 10, the coupling lugs 78 are capable of engaging the lower edge of the flange 106 along the upper edge of the support 96 of the T-bar. In this way, the bar pendant 10 is fixed essentially, under pressure in the support 96 of the T-bar. Typically, a fastener 108 such as a threaded screw is inserted through a hole 44 in the mounting plate 40 to permanently secure the bar pendant 10 to the bar. bracket 98 of the T-bar. As shown in Figures 10 and 11, the second adhesion plate 70 may remain adhered to the mounting plate 40 in its original position perpendicular to the plane of the mounting plate 40 and extending outwardly. of the bracket 96 of the T-bar. The second adhesion lug 70 has a dimension and structure for coupling with an adhesion member of an adjacent bar pendant when it is desired to mount two lighting fixtures adjacent to each other. As shown in Figure 11, two bar pendants and the respective adhesion members can be overlapped and coupled together with a screw 110 or other fastener. In this mode, one end of the bar pendant can adhere to and hold onto the adjacent bar pendant. A second embodiment of the invention is shown in Figures 12-15. The bar pendant 112 is similar to that of the previous embodiment and includes support arms 114 coupled together for slidable movement, a mounting plate 116 coupled to a first end of the respective mounting arm and an adhesion member 118. An adhesion member 118 has a substantially planar configuration extending perpendicular to the plane of the respective support arm 114. A bridge 120 is formed to capture a fastener 122 to adhere the bar pendant to a ceiling joist as in the previous embodiment. In the previous embodiment, the length of the bar pendant 112 can be shortened only by the length of the respective support arms because the ends of the support arms contact the mounting plate. A removable tab that can be removed in the field is provided to allow the channel or support arm to pass beyond the mounting plate. In the embodiment shown in Figure 13, the mounting plate 116 includes a first vertical slot 124 and a second horizontal slot 126 adjacent the support arm 114 and a notch 128 for receiving the T-bar support. Slots 124 and 126 define cutting lines so that a section of the mounting plate 116 can be removed as shown in Figure 14. The section 130 of the mounting plate 116 can be removed to insert a tool into the slots 124 and 126 for prying. or breaking section 130 of mounting plate 116. The section 130 can be bent perpendicular to the plane of the mounting plate 116 or it can be completely removed to define a hole 122 as shown in Figure 14. In this way, the length of the bar pendant 112 and the distance between the plates 116 of Assembly can be reduced by allowing the ends of the support arms to extend through the holes 132 by passing the respective mounting plates 116 as shown in Figure 15. The bar pendant 112 can adhere to a ceiling joist as in FIG. the previous modality. The support arms 114 can be cut or broken along brittle lines so that the ends of the support arms 114 do not extend beyond the mounting plate 116. In this way, the mounting plate 116 can adhere to a ceiling joist as in the previous embodiment. The membership member 118, as shown in Figure 12 extends substantially perpendicular to the plane of the mounting plate 116. Preferably, an adhesion member 118 includes an elongated hole 134 and a circular hole 136 for receiving the fasteners to adhere the rod pendant 112 to a ceiling joist. A third embodiment of the invention is shown in Figures 16-24. As in the previous embodiments, the bar pendant 160 is adapted to be used adhered to a ceiling joist or a T-bar roof bracket. The bar pendant 160 includes support arms 162 having a longitudinal dimension with a first end 164 coupled to a mounting plate 166. The support arm 162 includes a notch 168 along the lower edge 170 adjacent to the mounting plate 166 to receive a T-bar.

The mounting plate 166 has a substantially planar configuration extending perpendicular to the plane of the support arm 62 and includes a plurality of holes 172 for receiving the fasteners for adhering the mounting plate 166 to a ceiling joist. A bridge 174 of nails is also provided to hold the fastener as in the above embodiments. An adhesion member 176 extends from a lower edge 178 of the mounting plate 166. An adhesion member 176 has a substantially planar configuration and extends substantially perpendicular to the mounting plate 166. The adhesion member 176 is formed with an angled edge, as shown, to receive a tool to assist in the removal of the adhesion member 176 from a joist. As shown in Figure 16, an adhesion member 176 includes a first lug 180 and a second lug 182. The second lug 182 is provided with an elongated slot 184 and a circular bore 186 for receiving the fasteners for adhering the lug member 176. adhesion to the lower surface of a roof joist. The first lug 180 includes a coupling hook or lug 188 that bends in a downward direction on a slope with respect to the plane of the first lug 180. The first lug 180 also includes a hole 190 for receiving a fastener. In use, a bar pendant 160 is adhered to a lighting fixture 192 shown in Figure 19. As shown in Figure 17, the bar pendant 160 may adhere to a ceiling joist 194 upon locating an adhesion member 176 against a lower edge and locating the mounting plate 166 against a side edge of the joist 194. The fastener adhered to the stud bridge 174 is then hinged to penetrate the joist 194 to secure the bar pendant 160 in position. The bar pendant 160 is also adapted to be used on a T-bar support in a manner similar to the previous modalities. When the bar pendant 160 is used with a T-bar holder, the first lug 180 bends away from the second lug 182 and the mounting plate 166 to the position shown in Figure 18 where the second lug 182 is substantially parallel to, and in the same plane, as the mounting plate 166. In this position, the coupling lug 188 extends on a slope in a generally upward direction towards the upper end of the mounting plate 166 and towards the notch 168. The bar pendant 160 is fixed on the bar support 196 T so that the upper end of the T-bar 196 is received in the notch 168 as shown in Figure 19. The coupling lug 188 is located below the tab of the upper end of the T-bar 196 as shown in Figure 21 to limit the vertical movement of the bar pendant 160 with respect to the T-bar 196. With the lug 188 in a primary parallel orientation relative to the mounting plate 166, the hole 190 is positioned to allow a fastener secondary such as a screw that is driven under the upper part of the T-bar support. With reference to Figure 24, the roof tile 200 can be lifted up and removed without interference from the second lug 182. With reference to Figure 20, the second lug 182 is retained in its original position and extends perpendicular to the plane of the mounting plate 166. In a manner similar to the embodiment shown in Figure 11, the second lug 182 can be coupled to an adjoining lug of a bar pendant by a suitable fastener. The first lug 180 is secured to the T-bar 196 by the fastener 198. In one embodiment, the second lug 182 can interfere with the removal of the roof tiles 200, as shown in Figure 21, when the roof tiles they rise in an upward direction to withdraw or assemble. The second lug 182 can be removed by breaking the fold lines connecting the second lug 182 to the mounting plate 166. A slot 202 is provided along the connection between the second lug 182 and the mounting plate 166 so that the second lug 182 is coupled to the mounting plate 166 by a pair of uprights 204. The second lug 182 can be bent to break the studs 204 so that the second lug 182 can be removed as shown in Figure 22. The bar pendant 160 then engages the roof joist as shown in Figures 23 and 24. Although they have been chosen various embodiments to illustrate the invention, it should be appreciated that various changes and modifications may be made without departing from the scope of the invention as defined in the appended claims.

Claims (10)

1. A bar pendant for holding an electrical device embedded in a ceiling support, the bar support has a first and a second telescopic support arm connected to each other in a sliding manner, each support arm comprises: an elongated support body which has a first end and a second end, a mounting plate coupled to the first end of the body and extending substantially perpendicular to a plane of the support body, the mounting plate has at least one opening for receiving a fastener; and an adhesion member coupled to a lower edge of the mounting plate along the fold line, the adhesion member has a first substantially flat side and a second opposite side, and a retainer extending from the second side , the adhesion member can be bent from a first position where the adhesion plate extends substantially perpendicular to the mounting plate to make contact with a lower surface of a ceiling joist to a second position substantially parallel to the mounting plate to adhere to a support of the T-bar. The bar pendant of claim 1, wherein the adhesion member has a first side edge coupled to the mounting plate, a second outer edge opposite the first side edge, and a third lateral edge and a fourth lateral edge opposite the third lateral edge. The bar pendant of claim 2, wherein the retainer is a lug that is provided on the first side edge and extends on a slope with respect to a plane of the adhesion member. The bar pendant of claim 2, wherein the retainer is a coupling lug extending from the first side edge and oriented to a slope with respect to a plane of the adhesion member. The bar pendant of claim 2 further comprises a first coupling lug coupled to the third end of the adhesion member and a second engagement lug extending from the fourth lateral edge, the first and second lugs defining the retainer. 6. The bar pendant of claim 1, wherein the detent engages a tab of the T-bar when the adhesion member is in a second position. The bar pendant of claim 1, wherein the support body has a notch in a lateral bottom edge adjacent to the mounting plate to receive the T-bar support. 8. The bar pendant of the claim 1, wherein the mounting plate has a removable portion to form a hole to allow a portion of the body of the cooperating support arm to extend beyond the mounting plate. The bar pendant of claim 1, wherein the adhesion member comprises a first lug and a second lug, and wherein the retainer is formed integrally with a first lug, and the first and second lugs are oriented substantially perpendicular to a lug. plane of the mounting plate. 10. The bar pendant of claim 9, wherein the first lug has a third lug cut out of the first lug and folded out of the plane of the first lug, the third lug defining the retainer. 11 A bar pendant for holding an electrical device embedded in a ceiling support, the bar pendant has a first and second telescopic support arms coupled together for a slidable movement in a longitudinal direction, each support arm comprises: a body of support having a longitudinal dimension with a first end, a second end, an upper edge and a lower edge, the lower edge has a corner at the first end with a dimension to receive a support of the T-bar; a mounting plate coupled to a first end of the support body and extending substantially perpendicular to the plane of the support body, the mounting plate has at least one opening for receiving a fastener for adhering the mounting plate to a joist of the roof; and a first adhesion member and a second adhesion member coupled to a lower edge of the mounting plate that extend in a direction substantially perpendicular to the mounting plate to adhere to a lower side of a ceiling joist, the first member of adhesion has a retainer extending in a direction from a lower side and where the first adhesion member can be bent from a first position perpendicular to the mounting plate to a second position substantially parallel to the mounting plate to make contact with a lower surface of the T-bar support. The bar suspension of claim 11, wherein the first adhesion member has a flat central portion with a first end and a first engagement lug extending from the first end to a slope with respect to the plane of the central portion. 13. The bar pendant of claim 12, wherein the flat central portion has a pair of coupling lugs. The bar pendant of claim 12, wherein the first and second adhesion members are substantially perpendicular to the mounting plate. The bar pendant of claim 14, wherein the second adhesion member has a main body and a pair of studs extending substantially perpendicular to the mounting plate. The bar pendant of claim 11, wherein the first adhesion member includes a coupling lug cut from the first adhesion member on an edge that joins the mounting plate and extends on a slope with respect to the plane of the first adhesion member, the lug defines the retainer. 17. The bar pendant of claim 11, wherein the first adhesion member has a first edge coupled to the mounting plate, the first edge includes a lug extending on a slope with respect to a plane of the first adhesion. , the lug defines the retainer. The bar pendant of claim 11, wherein the mounting plate has a removable portion defined by brittle lines, the removable portion locates to form a hole when removed to allow a portion of the body of a support arm Cooperator pass through it. 19. A bar pendant for holding an embedded electrical device, the bar pendant has a first and second telescopic support arms coupled together for slidable movement in a longitudinal direction, each support arm comprising: a support body having a longitudinal dimension with a first end and a second end, an upper edge and a lower edge; a mounting plate coupled to the first end of the support body and extending in a direction substantially perpendicular to the longitudinal dimension of the support body, an adhesion member extending from a lower edge of the mounting plate to make contact with a lower edge of a ceiling joist, the mounting plate has an opening for receiving a fastener and a raised bridge integrally formed with the mounting plate and having a central portion separated from the mounting plate to define a hole between the portion center and the mounting plate, a fastener extending through and engaging the bridge, the bridge has a longitudinal dimension extending at an acute angle with respect to a plane of the adhesion member to allow a tool to be inserted in the hole and leverage against the ceiling joist. The bar pendant of claim 19, wherein the adhesion member has a retainer, the adhesion member is oriented substantially perpendicular to a plane of the mounting plate, and is bent to a position substantially parallel to the plate. assembly where the retainer is able to make contact with a lower edge of the T-bar holder. 21. The bar pendant of claim 20, wherein the adhesion member has a first inner side edge coupled to the mounting plate, a second outer side edge, a third side edge and a fourth side edge. 2

2. The bar pendant of claim 21, wherein the retainer is a lug that is provided on the first side edge and extends on a slope with respect to adhesion. 2

3. The bar pendant of claim 2, wherein the tab extends from the first side edge. 2

4. The bar pendant of claim 21 further comprises a first lug coupled to a third end of the adhesion member and a second lug extending from a fourth lateral edge of the adhesion member, the first and second lugs define a retainer and they extend on a slope with respect to the adhesion member. The bar pendant of claim 19, wherein the support body has a notch in an adjacent bottom edge of the mounting plate to receive a T-bar support. The bar pendant of claim 19 , wherein the mounting plate has a removable portion to form a hole to allow a portion of the body of a cooperating support arm to extend beyond the mounting plate. 27. The bar pendant of claim 19, wherein the adhesion member comprises a first adhesion plate and a second adhesion plate, and wherein the second adhesion plate includes a lug extending on a slope with respect to a plane of the second adhesion plate.