Abstract:
Apparatus, systems and methods of 80/90 CFM ventilation exhaust fans for bathrooms with telescoping side extension brackets and side by side electric driven motor and blower wheel, and being used with or without lights. The exhaust fans can include a single main housing, that allows for a blower housing to support the motor and a blower wheel in a side by side arrangement. The exhaust fans can further include an outside wiring box that is externally located to the main housing. The wiring box can have support male plugs and female receptacles for supplying an electrical power supply to the electric motor and light. The side extension brackets can include telescoping members that allow the exhaust fans to be easily attached to structural members inside of a ceiling so that the exhaust fan has a vent cover attached to the ceiling. Inside of the exhaust fans can be light box with closed sides and bottom which prevents incoming air from passing directly onto the lights. Instead incoming air is drawn to pass around the outside of the light box so that the light box functions as a heat sink reducing the heat generated from the light.

Description:
This application is a Continuation of U.S. patent application Ser. No. 13/219,326 filed Aug. 26, 2011, now U.S. Pat. No. 9,416,989, which claims the benefit of priority to U.S. Provisional Patent Application No. 61/384,072 filed Sep. 17, 2010. The entire disclosure of each of the applications listed in this paragraph are incorporated herein by specific reference thereto. 
    
    
     FIELD OF INVENTION 
     This invention relates to ventilation exhaust fans, and in particular to apparatus, systems and methods of 80 and 90 CFM (cubic feet per meter) ventilation exhaust fans for bathrooms with telescoping side extension brackets and side by side motor and blower wheel, and being used with or without lights. 
     BACKGROUND AND PRIOR ART 
     Various types of bathroom exhaust and ventilation fans have been proposed over the years. See for example, U.S. Pat. No. 4,867,640 to Penlesky et al.; U.S. Pat. No. 4,510,851 to Sarnosky et al.; U.S. Pat. No. 6,261,175 to Larson et al.; U.S. Pat. No. 6,488,579 to Larson et al.; U.S. Pat. No. 6,802,770 to Larson et al.; U.S. Pat. No. 7,203,416 to Craw et al.; and U.S. Pat. No. 7,654,495 to Adrian et al., which are all incorporated by reference. 
     There have been many problems with the prior art. For example, many bath fans are difficult to be installed into a ceiling since the housings cannot be easily attached to different locations of joists in the ceiling. If a joist is off center to the middle of bathroom ceiling the bath fan is not easy to center in the room. Additionally, many of the bath fans have numerous parts which add extra manufacturing costs. And as a result a bath fan that requires assembly of the bath fan at a job site will incur undesirable extra labor and material costs to install. Additionally, many bath fans have to be wired to components inside of the housings which also requires extra expensive labor costs to make the connections onside during the installation of the bath fan. 
     Thus, the need exists for solutions to the above problems with the prior art. 
     SUMMARY OF THE INVENTION 
     A primary objective of the present invention is to provide exhaust and ventilation fans, apparatus, systems and methods for bathrooms with telescoping side extension brackets and side by side motor and blower wheel that provides 80 (eighty) CFM (cubic feet of air per minute) of airflow, that are with or without lights. 
     A secondary objective of the present invention is to provide exhaust and ventilation fans, apparatus, systems and methods for bathrooms with telescoping side extension brackets and side by side motor and blower wheel that provides 90 (ninety) CFM (cubic feet of air per minute) of airflow, that are with or without lights. 
     A third objective the present invention is to provide ventilation fans, apparatus, systems and methods for bathrooms having flush mounted light sources with exterior perimeter grill having at least one vent opening(s) for passing air to a blower inside of the housing where the air does not pass into the light source and on any lights under the light lens cover. 
     A fourth objective the present invention is to provide ventilation fans, apparatus, systems and methods for bathrooms having flush mounted light sources with exterior perimeter grill having at least one vent opening(s) so that incoming air is guided around a blower fan and out the side opening and out the side exhaust opening of a housing, in order to reduce excess noise from air movement. 
     A fifth objective the present invention is to provide ventilation fans, apparatus, systems and methods for bathrooms with or without light sources with telescoping leg(s) on at least one outer wall of a housing for the attaching the housing to joists within a ceiling. 
     A sixth objective the present invention is to provide ventilation fans, apparatus, systems and methods for bathrooms with or without light sources having an exterior electrical box with exterior wiring box located outside of the housing. 
     A preferred embodiment of an exhaust fan, includes a single one-piece housing having closed side walls, closed top and open bottom, a blower wheel inside of the housing, an electrical motor for rotating the blower wheel that is side by side with each other, and side extension brackets on the housing for mounting the housings to support structures within a ceiling. 
     The motor can be an 80 (eighty) CFM (cubic feet per minute) generating motor. The motor can be a 90 (ninety) CFM (cubic feet per minute) generating motor. 
     The side extension brackets can include a first elongated side telescoping bracket directly mounted along one side wall of the housing, and a second elongated side telescoping bracket directly mounted along an opposite side wall of the housing, the second elongated side telescoping bracket being shorter than the first elongated side telescoping bracket. 
     A removable grill can cover the open bottom of the housing. Alternatively, a removable light shade can be separately detachable and attachable to the removable grill and light. A light box having closed sides and closed bottom can be included with the light being mountable inside of the light box, wherein air being drawn into the main housing by the blower passes around sides of the light box allowing for reducing heat generated from the light. 
     The exhaust fan can include a wiring box attached to an exterior side of the housing, wherein the wiring box includes a male plug and a female receptacle inside of the box for supplying an external power supply to the electrical motor. 
     The exterior mounted wiring box can also be used for supplying power connections to run the electrical motor and to power the light. The wiring box can include a first male plug and a first female receptacle inside of the box for supplying the external power supply to the electrical motor, and a second male plug and a second female receptacle inside of the box for supplying the external power supply to the light. 
     The blower wheel can be oriented in a vertical orientation, which improves airflow through the housing. 
     The light shade can include an elongated member which adjusts height of the shade relative to the housing. 
     Another embodiment of the ventilating exhaust fan, can include a single housing having closed side walls, closed top and open bottom, a blower wheel housing, a blower wheel inside of the blower wheel housing, an electrical motor for rotating the blower wheel that is side by side with each other inside of the blower wheel housing, a light supported by a support member attached to the housing, a grill cover having vents and a light shade for covering the housing, wherein incoming air into the housing passes to the blower wheel without contacting the light, a wiring box attached to an exterior surface of the single housing for supporting external wire connections for both the motor and the light, and side extension brackets on the housing for mounting the housings to support structures within a ceiling. 
     Further objects and advantages of this invention will be apparent from the following detailed description of the presently preferred embodiments which are illustrated schematically in the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is an exploded perspective view of an 80 CFM bath fan housing (with no heater) telescoping side extension brackets, side by side motor and blower wheel, with no light. 
         FIG. 2  is a partial exploded perspective view of the housing of  FIG. 1  with blower housing separated from the blower wheel. 
         FIG. 3  is an exploded perspective view of the housing of  FIG. 1  and blower wheel inside the blower housing along with the grille cover. 
         FIG. 4  is an exploded perspective view of the housing of  FIG. 1  along separated from the wire box cover, female plug, plug plate, male pronged plug, and wiring box plate. 
         FIG. 5  is a perspective view of the assembled bath fan housing of  FIG. 1  without grill cover. 
         FIG. 6  is a top view of the assembled bath fan housing of  FIG. 5  without grill cover. 
         FIG. 7  is a side cross-sectional view of the assembled bath fan of  FIG. 5  with grill cover. 
         FIG. 8  is a top view of the assembled bath fan housing of  FIG. 6  with grill cover. 
         FIG. 9  is a top right front perspective view of the assembled bath fan housing of  FIG. 8 . 
         FIG. 10  is a top left front perspective view of the assembled bath fan housing of  FIG. 8 . 
         FIG. 11  is a ceiling mounted view of the assembled bath fan of  FIG. 8  with airflow arrows. 
         FIG. 12  is an exploded perspective view of an 80 CFM bath fan housing (with no heater) telescoping side extension brackets, side by side motor and blower wheel, with a light. 
         FIG. 13  is an assembled perspective view with partial cut-away along one side of the 80 CFM bath fan housing of  FIG. 12  with removable light shade/cover. 
         FIG. 14  is another assembled perspective view along another side of the 80 CFM bath fan housing with light/shade cover of  FIG. 13   
         FIG. 15  is still another assembled perspective view along still another side of the 80 CFM bath fan housing with light shade/cover of  FIG. 13 . 
         FIG. 16  is a ceiling mounted view of the assembled 80 CFM bath fan housing and light of  FIGS. 13-15 , and also shows the airflow direction where the air enters the bath fan through the vents of the grill. 
         FIG. 17  is an exploded perspective view of an 90 CFM bath fan housing (with no heater) telescoping side extension brackets, separated side by side motor and blower wheel and blower housing, with separated light components. 
         FIG. 18  is a partial exploded perspective view of  FIG. 17  with assembled blower housing containing side by side motor and blower wheel with partial assembled light components. 
         FIG. 19  is an assembled perspective view with partial cut-away along one side of the 90 CFM bath fan housing of  FIGS. 17-18  with removable light shade/cover. 
         FIG. 20  is a top view of the assembled bath fan housing of  FIG. 19  without shade cover. 
         FIG. 21  is a perspective view of the assembled 90 CFM fan housing of  FIGS. 17-20 . 
         FIG. 22  is a ceiling mounted view of the assembled 90 CFM bath fan housing and light of  FIGS. 17-21 . 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Before explaining the disclosed embodiments of the present invention in detail it is to be understood that the invention is not limited in its applications to the details of the particular arrangements shown since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation. telescoping side extension brackets 
     80 CFM Bath Exhaust Fans with Telescoping Side Extension Brackets (No Lights) 
     A list of the components for  FIGS. 1-6  will now be described.
       1 . 80 CFM Bath Fan     10 . Aluminum damper.     20 . Outlet     30 . install rubber (2)     40 . Clinch     50 . Wiring cover box     60 . two or three pronged plug/socket (female)     65 . external electrical connectors     70 . Plug plate     80 . Left side plate of housing     90 . Plate for the wiring box     100 . Bracket cover (2)     110 . Suspension/Mounting bracket (2)     112 . bent flange ends     120 . Housing     122 . open top     123 . upper edge portions with rectangular flaps     128 . closed bottom     130 . Fixing iron (2)     140 . Blower wheel     145 . wheel tower connector     150 . Washer     160 . M8 tower shape nut     170 . Blower housing     175 . interior chamber     178 . exhaust outlet     180 . Two or Three Pronged Plug (male)     190 . Motor     190 T tabs extending from motor     195 . axle portion     200 . Motor Installation Plate/Fitting seat for motor     202 A,  202 B. flanges on base edges of plate     202 T tabs extending into opening     202 V vertical tab extending from rounded top of plate  200       206  bent trapezoidal portion of plate     210 . Cover of capacitor box     220 . 7 shaped flange     230 . Z shaped flange     240 . Springs (2)     242 . apex     248 . legs     250 . Spring clip fastener     260 . Grill cover     262 . inner protruding portions on grill cover edges   

       FIG. 1  is an exploded perspective view of an 80 CFM bath fan  1  with housing  120  with no heater, telescoping side extension brackets  100 ,  110 , side by side motor  190  with blower wheel  140 , with no light.  FIG. 2  is a partial exploded perspective view of the housing  120  of  FIG. 1  with blower housing  170  separated from the blower wheel  140 .  FIG. 3  is an exploded perspective view of the housing  120  of  FIG. 1  and blower wheel  140  inside the blower housing  170  along with the grille cover  260 .  FIG. 4  is an exploded perspective view of the housing  120  of  FIG. 1  along separated from the wire box cover  50 , female plug  60 , plug plate  70 , male pronged plug  180 , and wiring box plate  90 .  FIG. 5  is a perspective view of the assembled bath fan housing  120  of  FIG. 1  without grill cover  260 .  FIG. 6  is a top view of the assembled bath fan housing  120  of  FIG. 5  without grill cover  260 .  FIG. 7  is a side cross-sectional view of the assembled bath fan  1  of  FIG. 5  with grill cover  260 . 
     Referring to  FIGS. 1-7 , main housing  120  can include a single box shape having three closed sides, and open top  122  with bent flange edges, and closed bottom  128 . A blower housing  170  can have an open interior chamber  175  and exhaust outlet  178 . Inside of the chamber  175  can be located a motor  190  with axle portion  195  that connects inside the middle tower connector  145  of a rotatable blower wheel  140 , with a washer  150  and  160  tower nut  160 . The motor  190  and blower wheel  140  can be side by side with one another within the blower housing  170  which is located in the main housing  120 . The motor  190   m  assembled with the blower housing  170  (as shown in  FIGS. 3  and  18 ) can be fixably held in place by vertical installation plate  200  inside of the main housing  120 . Vertical plate  200  can have a circular opening which functions as a seat for the motor  190 . Four tabs  202 T equally spaced apart from one another can extend into the plate opening for attaching to four complementary tabs  190 T on the motor  190 . Installation plate  200  can be fastened as a bottom flat base edge to a closed bottom floor portion  128  inside of the main housing by fasteners that attach flange  202 A and flange  202 B which is off the bent trapezoidal portion  206  of the plate to the closed bottom floor portion  128 . Vertical plate  200  can have a rounded top with a vertical tab  202 V extending therefrom, and a flat straight base and straight sides extending from the flat straight base. Upper flange(s)  220 ,  230  on the side wall of the vertical plate  200  can be fastened to the inside of a closed outer side wall of housing  120  by mounted fixing iron(s)  130  using additional fasteners, and the like. Power to the motor  190  can be supplied by connector with two pronged male plug end  180 . 
     The vertical blower wheel design  140  allows for a smaller housing dimension, but also performs just as well as a horizontal design. A vertical design can help improve airflow because of the way the air enters the blower wheel  140  and is pushed out through the outlet end. 
     One side of the main housing  120  can be an exhaust side (left side)  80 , with a funnel shaped outlet  20  with a movable damper  10 . On the outlet side  80  and opposite side of the housing  120  can be bracket covers  100  mounted directly to the housing  120 . Slidable mounting brackets  110  each with bent ends  112 . 
     Electrical power can be supplied to the fan housing embodiment through a wiring box plate  90  having two sides and closed bottom that is mounted to an exterior side of the main housing  120 . Male plug  180  (which connects power to motor  190 ) can attach to socket  60  through the plug plate  70 . The socket  60  can be connected by connectors  65  to an external electrical power supply. An L shaped wiring box cover  50  can close off the open top and side of the box plate  90 . The external wiring box  90  allows for ease in connecting and disconnecting power to the motor  190  without having to open the main housing  120 . 
     A pair of grill clips  240  can springably hold the grill cover  260  to the blower housing  120  ( FIGS. 1, 3 &amp; 4 ). The pair of grill clips  240  can each be scissor clips each having an apex  242  that can attach to an inner protruding portion along the lower edge  262  of the grill cover  260  by spring clip fasteners  250 . The cover  260  can be attached by pressing together the legs  268  of the clips  260 , so that the legs  268  can be inserted to catch inside upper ledge portions  123  of the blower housing  120 . There can be a rectangular flap  123  that allows the spring clips  240  to sit inside the blower housing  120  and held in place once the clips  240  are in the open position. 
     The capacitor box cover  210  acts as a protection for the wiring and also secures  175  to the bath fan housing. The 7 shaped flange  220  is the bottom piece of  210  that has an opening for the screw to fasten to fixing iron  130  on the bath fan housing. The Z shaped flange  230  is the same as  220  where it has an opening for a screw to secure to the fixing iron  130  on the bath fan housing. 
       FIG. 8  is a top view of the assembled bath fan housing of  FIG. 6  with grill cover  260 .  FIG. 9  is a top right front perspective view of the assembled bath fan housing  120  of  FIG. 8 .  FIG. 10  is a top left front perspective view of the assembled bath fan housing  120  of  FIG. 8 .  FIG. 11  is a side mounted view of the assembled bath fan of  FIG. 8  with airflow arrows. Referring to  FIGS. 1-11 , the bath fan  1  can be mounted with the grill cover  260  mounted outside of a ceiling C, with the telescoping suspension brackets  110  mounting the bath fan to joists inside of the ceiling by fasteners connected to both the joists and the bent flange ends  112 . Air from a room space below the ceiling mounted bat fan can be drawing in the direction of arrow I into the bath fan housing  120  by the motor operated blower wheel  140  and exhaust to outlet  20  to vent outside of the room and in the direction of arrows O. 
     80 CFM Bath Exhaust Fans with Telescoping Side Extension Brackets (with Lights) 
     Additional components will now be describes for this embodiment.
       270 . 80 CFM with light     271 . 13 W CFL bulb     272 . GU 24 Socket     273 . male plug     274 . female receptacle     275 . connectors to external electrical supply     276 . light box     278 . light box fixed plate     280 . spring (similar to spring  240 )     290 . Grill frame (removable light/shade cover)     292 . grill vents     292 B. side vents     300 . grill lens   

       FIG. 12  is an exploded perspective view of an embodiment  270  of an 80 CFM bath fan housing (with no heater)  120 , telescoping side extension brackets  110 , side by side motor  190  and blower wheel  140 , with a light  271 .  FIG. 13  is an assembled perspective view with partial cut-away along one side of the 80 CFM bath fan housing  120  of  FIG. 12  with removable light shade/cover  290 .  FIG. 14  is another assembled perspective view along another side of the 80 CFM bath fan housing  120  with light/shade cover  290  of  FIG. 13 .  FIG. 15  is still another assembled perspective view along still another side of the 80 CFM bath fan housing  120  with light shade/cover  290  of  FIG. 13 . 
     Referring to  FIGS. 12-15 , the bath fan with light embodiment  270  includes similar components to the previous embodiment described, with the differences of using a light source  270 , such as a 13 W CFL bulb that is attached to a socket  272  such as a GU 24 socket that can be mounted by fasteners in a protective metal light box  276 . The light box can be attached by fasteners to a light box fixed plate  278  that can be fixably mounted to an upper portion of the blower housing  170 . The socket  272  can be wired to a male plug  273  (similar to those previously described), which can be mateably attached to a female receptacle (similar to those previously described) inside of an external wiring box  90 . The female receptacle  274  can be wired to an external electrical power supply (similar to the external power supply previously described) via conductors  275 . 
     The grill frame  290  functions similar to the grill cover  260 , previously described, and instead can have two or more grill vents  292 . In the middle of the grill cover  290  can be a removable lens cover  300 . The grill cover  300  can snap into the opening in the center of the grill cover  290  with male and female members (not shown) around the perimeter of the lens cover  300 . The grill cover  290  can be attached to the main housing  120  using springs  280 , which function similarly to springs  240  that were previously described. 
       FIG. 16  is a ceiling mounted view of the assembled 80 CFM bath fan housing and light embodiment  270  of  FIGS. 13-15 . Similar to the previously described embodiment  1 , the bath fan and light embodiment  270  can be mounted within a ceiling C with the grill cover  290  exposed beneath the ceiling and the bath fan housing  120  secured to joists by the telescoping suspension brackets  110 . Here, incoming air can be drawn into the housing  120  through grill vents  292  and side grill vents  292 B. The light box  276  prevents incoming air from coming into contact with the bulb (light source)  271 . Instead incoming air is drawn around the outside of light box  276  allowing for a heat sink and cooling effect for the heat generated from the light bulb  271 . 
       FIG. 7  is an exploded perspective view of an 80 CFM bath fan housing (with no heater) telescoping side extension brackets, side by side motor and blower wheel, with a light.  FIG. 8  is a partial exploded view of the housing of  FIG. 1  with removable light shade/cover. 
       FIG. 9A  shows the details of the outlet duct.  FIG. 9B  shows connection point between outlet duct connected to housing.  FIG. 9C  shows the plug-in inside the bath fan housing to power the light.  FIG. 9D  shows the blower wheel connection to the blower wheel housing (#17).  FIG. 9E  shows the welded C-shaped bracket on the housing. 
       FIG. 9F  shows the connection for how the junction box connects to the bath fan housing.  FIG. 9G  shows #22, #20, and #13 connection points to form a housing for the blower wheel and then connects to #12 which is the bath fan housing. 
       FIG. 9H  shows the motion sensor that is near #30 (light lens cover).  FIG. 9I  show how the lens (#30) connects to the grill and is flush against the grill (#29). 
       FIG. 10  is a side view of an assembled bath fan housing of  FIG. 7 .  FIG. 11  is a partial side cross-sectional view of the bath fan of  FIG. 10 .  FIG. 12  is a bottom partial cross-sectional view of the assembled fan of  FIG. 10 .  FIG. 13  is a side cross-sectional view of the light shade/cover of  FIGS. 10-12 . 
     The light shade/cover is held in place by various components. There are 2 plastic pieces that extrude out from the lens cover and you line up the lens cover on one side of the grill so it inserts and then you push in the opposite side of the lens cover then push down so it falls inside the grill and release. Once you release the 2 clips will lock itself in place. 
     90 CFM Bath Fan with Flush Mount Light &amp; Motor Beneath Blower Wheel 
     A list of components for  FIGS. 17-22  will now be described.
       400 . 90 CFM bath fan with light.     410 . Decorative Nut     420 . Decorative Cover     430 . Connect screw     440 . Glass Shade     450 . cloak wire cover     460 . socket bracket     470 . decorative ring     530 . GU24 bulb (2)     540 . socket     550 . socket     560 . circular ball (2)     570 . grill frame with vent openings     573 . vent openings     576 . closed floor of grill frame     580 . grill bracket (C shaped to support grill frame  570     

       FIG. 17  is an exploded perspective view  400  of an 90 CFM bath fan housing (with no heater)  120 , telescoping side extension brackets  110  with mounted bracket, separated side by side motor  190  and blower wheel  140  and blower housing  170 , with separated light components  410 - 470 ,  530 - 580 .  FIG. 18  is a partial exploded perspective view  400  of  FIG. 17  with assembled blower housing  170  containing side by side motor  1990  and blower wheel  140  with partial assembled light components  410 - 470 ,  530 - 580 .  FIG. 19  is an assembled perspective view with partial cut-away along one side of the 90 CFM bath fan housing  120  of  FIGS. 17-18  with removable light shade/cover  440 .  FIG. 20  is a top view of the assembled bath fan housing  120  of  FIG. 19  without shade cover  440 .  FIG. 21  is a perspective view of the assembled 90 CFM fan housing of  FIGS. 17-20 . 
     Referring to  FIGS. 17-21 , the 90 CFM bath fan embodiment  400  can include basic components similar to those described in the previous embodiments, with different light components  410 - 470  and  530 - 580 . Covering the top opening of the main housing  120  can be a grill bracket  580  having bent ends that can be attached to inner sides of the main housing  120  by fasteners, and the like. The closed bottom  576  of a circular grill frame  570  can be attached to an upper portion of the grill mounting bracket  580  by additional fasteners, and the like. On the outer perimeter of the grill frame  570  can be vent openings  573 . Light sockets  540 ,  550  can be mounted to the floor  576  of the grill frame  570  by socket brackets  460 , with the electrical connection ends protected by cloak wire cover(s)  450 . Inside of the sockets  540 ,  550  can be removable light sources  530 , such as but not limited to GU24 bulbs, and the like. 
     An elongated connect screw  430  can have a bottom end screwably attached to a central portion of the floor  576  of the grill frame  570 , and an upper threaded end that is attached to a dome shaped light shade  440  by a decorative nut  410  with decorative cover  420 . Connect screw  430  can be threaded inside so it allows for height adjustment to fit standard and thicker ceiling boards as needed. 
     A decorative ring  470  can be held in place by being fixably adhered to one side ball members  560 , with the opposite side of the ball members  560  being adhered to an outer perimeter surface of the grill cover  570 . Both  560  and  470  are part of the flush mount design and used and are used for aesthetic purposes. 
       FIG. 22  is a ceiling mounted view  400  of the assembled 90 CFM bath fan housing  120  and light components  410 - 470 ,  530 - 580  of  FIGS. 17-21 . In operation the bath fan housing can be mounted inside of the ceiling by the telescoping members  100 ,  110  being attached to structural members, such as joists, and the like, with the grill cover plate being attached beneath the ceiling C. Incoming air is drawn into the housing through perimeter vent openings  573  Vent openings  573  can allow for airflow to pass in because  576  blocks any air from entering the light bulb area. Bottom  576  acts as a platform to secure the light sockets and is air tight because it is 1 piece with  573 .  573  allows the flush mount to be raised about ½″ from the bath fan housing, just enough to allow for air to enter. 
     While the invention references fasteners, the fasteners, can be removable fasteners, such as but not limited to screws, bolts, and the like, as well as other types of fasteners, such as rivets, and the like. 
     Although the preferred embodiments describe the housings to be attached directly to joists in ceilings, the invention can apply to attaching the housings to structural members in walls, and other structural members behind ceilings and/or walls. 
     While the invention has been described, disclosed, illustrated and shown in various terms of certain embodiments or modifications which it has presumed in practice, the scope of the invention is not intended to be, nor should it be deemed to be, limited thereby and such other modifications or embodiments as may be suggested by the teachings herein are particularly reserved especially as they fall within the breadth and scope of the claims here appended.