Auditorium-chair portable writing table

Abstract

An auditorium-chair and portable-writing-table combination in which a portable writing table having a writing surface on its upper side, has downwardly-opening U-shaped channels on its underside that are received on the respective arm rests on each side of the seat, one channel being laterally and angularly displaceable with respect to the board to accommodate variations in the spacing and the angular relationship of a pair of arm rests. The other channel is fixed against lateral and angular displacement to render the mounted table stable against lateral displacement. The laterally displaceable channel is formed with transverse slots in its bite portion that loosely receive the headed studs secured to the table.

What is claimed is:  
     
         1 . An auditorium-chair and portable-writing-table combination comprising a chair seat, an arm rest in the nature of a generally horizontal board on each side of the seat, and a portable writing table having a writing surface on its upper side and downwardly-opening U-shaped channels on its underside that are received on the respective arm rests, one of said channels being horizontally displaceable with respect to the board to accommodate variations in the relationship of the arm rests with respect to each other.  
     
     
         2 . An auditorium-chair and portable-writing-table combination according to  claim 1 , wherein the other channel is secured against horizontal displacement to render the mounted table stable against horizontal displacement.  
     
     
         3 . An auditorium-chair and portable-writing-table combination according to  claim 1 , wherein the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         4 . An auditorium-chair and portable-writing-table combination according to  claim 1 , wherein one of said channels is displaceable with respect to the board to accommodate variations in the relationship of the arm rests.  
     
     
         5 . An auditorium-chair and portable-writing-table combination according to  claim 1 , wherein the one of said channels is also angularly displaceable with respect to the board to accommodate variations in the angular relationship of the arm rests, and the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         6 . An auditorium-chair and portable-writing-table combination according to  claim 1 , wherein the outer leg of one of the U-shaped channels is hinged to its bite and biased inwards thereabout to grasp the associated arm rest.  
     
     
         7 . An auditorium-chair and portable-writing-table combination according to  claim 6 , wherein the outer leg of the other of the U-shaped channels is hinged to its bite and biased inwards thereabout to grasp the associated arm rest.  
     
     
         8 . An auditorium-chair and portable-writing-table combination according to  claim 6 , and the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         9 . A universal stable writing table for an auditorium chair having arm rests, comprising a board having an upper writing surface, and downwardly-opening U-shaped channels on the board's underside that are placeable on the arm rests, one of said channels being laterally displaceable with respect to the board to accommodate variations in the spacing of arm rests.  
     
     
         10 . A universal stable writing table for an auditorium chair having arm rests according to  claim 9 , wherein the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         11 . A universal stable writing table for an auditorium chair having arm rests according to  claim 9 , wherein the one of said channels is also angularly displaceable with respect to the board to accommodate variations in the angular relationship of arm rests.  
     
     
         12 . A universal stable writing table for an auditorium chair having arm rests according to  claim 11 , wherein the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         13 . A universal stable writing table for an auditorium chair having arm rests according to  claim 9 , wherein the outer leg of the one of said U-shaped channels is hinged to its bite and biased inwards thereabout to engage the side of the associated arm rest.  
     
     
         14 . A universal stable writing table for an auditorium chair having arm rests according to  claim 9 , wherein the one of said channels is also angularly displaceable with respect to the board to accommodate variations in the parallel relationship of arm rests, and wherein its outer leg is hinged to the bite and biased inwards thereabout to grasp the associated arm rest and clamp the board to it.  
     
     
         15 . A universal stable writing table for an auditorium chair having arm rests according to  claim 13 , wherein the other channel is fixed against lateral displacement to render the mounted table stable against lateral displacement.  
     
     
         16 . A universal stable writing table for an auditorium chair having arm rests according to  claim 9 , wherein the bite of the U-shaped channel is formed with laterally extending slots, and headed studs fixedly depend from the board and are received in the slots to floatingly laterally support the channel.  
     
     
         17 . A universal stable writing table for an auditorium chair having arm rests according to  claim 16 , wherein the headed studs fixedly depending from the board are loosely received in the slots to also floatingly angularly support the channel.  
     
     
         18 . A universal stable writing table for an auditorium chair having arm rests according to  claim 13 , wherein the outer leg is formed on its free end with an inwardly directed portion for engaging the underside of the arm rest and latching the table to the chair.  
     
     
         19 . An inexpensive attachment mechanism for securing a first part to a longitudinally-extending part, comprising U-shaped channel having bite and leg portions to embrace the longitudinally-extending part, said bite portion having inner and outer layers, one of said leg portions being fixed and a lateral extension thereof forming part of one of the biter layers, the other of said leg portions being hinged at the bite had having a hinge portion forming another part of said one of the bite layers, and a plate constituting the other of the bite layers and fixed to the parts forming said one of the bite layers to define an integral structure.  
     
     
         20 . An inexpensive attachment mechanism for securing a first part to a longitudinally-extending part according to  claim 19 , wherein transverse slots formed in outer layer of the bite portion for receiving headed studs and accommodating channel movement thereon.  
     
     
         21 . An inexpensive attachment mechanism for securing a first part to a longitudinally-extending part according to  claim 19 , wherein the hinged leg portion is swingable outwards against a bias, and an extension is fixed to the swingable leg for moving it outwards against the bias.  
     
     
         22 . An inexpensive attachment mechanism for securing a first part to a longitudinally-extending part according to  claim 20 , wherein the outer leg is formed with an inwardly directed portion for engaging the underside of the non-aligned part and latching the part to it.  
     
     
         23 . An inexpensive attachment mechanism for securing a part to a longitudinally-extending part according to  claim 20 , wherein the, fixed leg portion has an outward lateral extension serving to guide the channel onto the longitudinally-extending part.  
     
     
         24 . An improved auditorium-chair and portable-writing-table combination according to  claim 1 , wherein headed studs depend from the bottom of the table, and the horizontally displaceable channel is formed with transverse slots in its bite portion that loosely receive the headed studs secured to the table.