Portable projection screen
OwnerWilliam P. Alleninventor
Life of this patent
Estimating the term…
Abstract
A portable projection screen including a sheet of flexible material and a collapsible support for the sheet. The support includes a central hub member having a plurality of sockets therein. Multiple extensible-contractible rods fit at one set of their ends in the hub member and radiate outwardly therefrom. The outer ends of the rods are received in connectors secured to edge margins of the sheet, and when the rods are extended they tense the sheet into a substantially planar surface. A collapsible mast is provided for supporting the screen above a horizontal surface, or for hanging it on a wall.
Claims18
A portable projection screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member, at least three elongate rods having inner and outer ends, means on said hub member of detachably connecting the inner set of ends of said rods to said hub member with said members radiating outwardly therefrom at substantial angles relative to each other and with the outer set of ends of said rods occupying a substantially common plane, spaced-apart connector means on said sheet adjacent marginal edges thereof for releasably connecting outer end portions of said rods to said sheet, said connector means being so positioned on the sheet that when said rod ends are connected thereto in operative positions the sheet is tensed, and said sheet being collapsible upon release of said rods from said connector means.
A portable projection screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member, at least three elongate, extensible-contractible rods having inner and outer ends, means on said hub member for detachably connecting the inner set of ends of said rods to said hub member with said rods radiating outwardly therefrom at substantial angles relative to each other with the outer set of ends of said rods occupying a substantially common plane, and spaced-apart connectors on said sheet adjacent marginal edges thereof for connecting outer end portions of said rods to said sheet, a connector comprising a spring clip secured to said sheet adapted to receive an outer end portion of a rod and frictionally hold the same therein and being so positioned on the sheet that the sheet is tensed when said rod ends are connected thereto and the rods are extended.
A portable projection screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member, at least three elongate telescopic rods, each having inner and outer ends shiftable to different adjusted positions relative to each other on extension and retraction of the rod, holding means for maintaining a rod in a selected adjusted position, means on said hub member for detachably connecting the inner set of ends of said rods to said hub member with said rods radiating outwardly therefrom at substantial angles relative to each other and with the outer set of ends of said rods occupying a substantially common plane, spaced-apart connector means on said sheet adjacent marginal edges thereof for releasably connecting outer end portions of said rods to said sheet and being so positioned on the sheet that the sheet is tensed when said rod ends are connected thereto and extended.
A portable projection screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member, at least three elongate rods having inner and outer ends, means on said hub member for detachably connecting the inner set of ends of said rods to said hub member with said members radiating outwardly therefrom at substantial angles relative to each other and with the outer set of ends of said rods occupying a substantially common plane, spaced-apart connector means on said sheet adjacent marginal edges thereof for connecting outer end portions of said rods to said sheet, said connector means being so positioned on the sheet that when said rod ends are connected thereto in operative positions the sheet is tensed, with said connector means comprising a spring clip secured to said sheet adapted to receive an outer end portion of a rod and frictionally hold the same, and including a pair of gripping legs normally biased to positions in angularly disposed relationship to each other, which legs are shiftable on the application of force thereto toward a more nearly parallel relationship, and upon release of such force are urged toward said normal angular disposed relationship, said gripping legs having openings extending therethrough which, when said legs are shifted toward said more parallel relationship, are sufficiently aligned to receive a rod therethrough and upon release frictionally grip said rod to hold the same therein.
A portable projections screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member;
- at least three elongate rods having inner and outer ends, a rod having a shoulder thereon spaced longitudinally inwardly from the inner end of the rod with a surface of said shoulder facing longitudinally of the rod away from said inner end;
- means on said hub member for detachably connecting the inner set of ends of said rods to said hub member with said members radiating outwardly therefrom at substantial angles relative to each other and with the outer set of ends of said rods occupying a substantially common plane, said means on the hub member for connecting the inner end of the rod to the hub member comprising a socket in said hub member adapted to receive said inner end of the rod, said socket including means releasably engaging said face of the shoulder to inhibit removal of a rod therefrom and means for engaging opposed sides of said rod intermediate said shoulder and inner end of the rod to inhibit lateral movement of the rod in the socket;
- spaced-apart connector means on said sheet adjacent marginal edges thereof for connecting outer end portions of said rods to said sheet, said connector means being so positioned on the sheet that when said rod ends are connected thereto in operative positions the sheet is tensed.
A portable projection screen comprising
- a sheet of flexible material, and
- sheet support means including a central hub member;
- at least three elongate rods having inner and outer ends, a rod being hollow at its inner end and having a portion thereon projecting radially inwardly within said hollow end of the rod;
- means on said hub member for detachably connecting the inner set of ends of said rods to said hub member with said members radiating outwardly therefrom at substantial angles relative to each other and with the outer set of ends of said rods occupying a substantially common plane, said means for detachably connecting the inner end of the rod to the hub member comprising an elongate projection extending radially outwardly from said hub on which said inner end of the rod is detachably received and means for releasably engaging said projecting portion of said rod to inhibit removal of the rod therefrom;
- spaced-apart connector means on said sheet adjacent marginal edges thereof for connecting outer end portions of said rods to said sheet, said connector means being so positioned on the sheet that when said rod ends are connected thereto in operative positions the sheet is tensed.
Dependencies are inferred from the claim text.