초록 ▼

This invention relates to an apparatus for securing a projector. The apparatus is mountable to a ceiling drop pipe and comprises a cage and a drop pipe connector assembly. The cage has a plurality of interconnected members that together define an enclosure for housing a projector and impeding remova

This invention relates to an apparatus for securing a projector. The apparatus is mountable to a ceiling drop pipe and comprises a cage and a drop pipe connector assembly. The cage has a plurality of interconnected members that together define an enclosure for housing a projector and impeding removal of the projector from the cage. At least some of the members are connected together by a member fastener that is fastenable only from inside the cage. The position of at least some of the members can be adjusted relative to other members so that the size of the enclosure can be adjusted to fit the projector snugly therein, thereby impeding access to the fastener.

대표청구항 ▼

What is claimed is: 1. An apparatus for securing a projector, the apparatus being mountable to a ceiling drop pipe and comprising (a) a cage having a plurality of interconnected members that together define an enclosure for housing a projector and impeding removal of the projector from the cage, at

What is claimed is: 1. An apparatus for securing a projector, the apparatus being mountable to a ceiling drop pipe and comprising (a) a cage having a plurality of interconnected members that together define an enclosure for housing a projector and impeding removal of the projector from the cage, at least some of the members being connected together by at least one member fastener that is fastenable from inside the cage, such that the position of at least some of the members can be adjusted relative to other members so that the size of the enclosure can be adjusted to fit the projector snugly therein, thereby impeding access to the fastener, and wherein two of the members are top plates connected to each other by at least one of the member fasteners, and laterally adjustable relative to each other such that the width of the cage can be adjusted; and, (b) a connector assembly connectable to a ceiling drop pipe, and having a cage mounting portion mounted to at least one of the members by at least one connector assembly fastener that is fastentable from inside the cage. 2. An apparatus as claimed in claim 1 wherein the cage mounting portion of the connector assembly is mounted to one of the top plates. 3. An apparatus as claimed in claim 2 wherein some of the members are top plate members that extend downwardly from the top plates, and wherein some of the members are vertically extending members that extend generally vertically and are adjustably connected to the top plate members by at least one of the member fasteners such that the height of the cage can be adjusted. 4. An apparatus as claimed in claim 3 wherein some of the members are lateral support members for supporting a projector and which extend laterally from the vertically-extending members and are adjustably connected to each other by at least one of the member fasteners such that the width of the cage can be adjusted. 5. An apparatus as claimed in claim 4 wherein some of the members form a lock bar assembly comprising a top track mounted to at least one of the top plates and a pair of L-shaped wings having a downwardly-extending portion for impeding removal of the projector from the cage, and a laterally-extending portion connected to the top track by at least one of the member fasteners such that the depth of the cage can be adjusted. 6. An apparatus as claimed in claim 5 wherein the top track is removably mounted to the at least one of the top plates by a lock, wherein removal of the top track from the rest of the cage enables installation and removal of the projector from the cage. 7. An apparatus as claimed in claim 1 wherein the connector assembly comprises a ball having a threaded portion in a recess of the ball, and a collar having the cage mounting portion at a base of the collar, a cavity for receiving the ball, and a drop pipe opening large enough to pass a threaded drop pipe therethrough to fasten to the threaded portion. 8. An apparatus as claimed in claim 7 wherein the base of the collar has a rim that defines an opening large enough to pass the ball therethrough, and wherein the cage mounting portion is located at the rim. 9. An apparatus as claimed in claim 1 wherein the connector assembly comprises a flange mounting assembly with a hollow cylinder having a threaded portion on an inside surface of the cylinder, a disc portion extending from a base of the cylinder and having the cage mounting portion and a stopper assembly mounted to the cage and comprising a compressible cylinder that is slidable through the mounting assembly cylinder and into the drop pipe when uncompressed, and that can be expanded laterally inside the drop pipe when compressed, thereby impeding efforts to unscrew the apparatus from the drop pipe. 10. An apparatus as claimed in claim 9 wherein the threaded portion is right hand threaded, and the connector assembly further comprises a left hand threaded bolt extending through the comprehensible cylinder and a left hand threaded nut threadable onto the bolt to control the compression of the cylinder.