Overhead projection system
First Claim
1. An overhead projection system comprising:
- an overhead projector support assembly extending outwardly from a generally vertical support surface in a generally horizontal disposition;
a display screen having a display surface mounted on said support surface beneath said projector support assembly; and
a projector mounted on said projector support assembly and aimed to project images onto the display surface of said display screen.
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0 Petitions
Accused Products
Abstract
An overhead projection system includes an overhead projector support assembly extending outwardly from a generally vertical support surface in a generally horizontal disposition. A display screen having a display surface is mounted on the support surface beneath the projector support assembly. A projector is mounted on the projector support assembly and is aimed to project images onto the display surface of the display screen. Preferably, the projector support assembly includes a governor in the form of a damper and spring arrangement to control downward pivotal movement of the projector support assembly when a load is placed on the projector support assembly and to return the projector support assembly to its generally horizontal disposition when the load is removed.
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Citations
57 Claims
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1. An overhead projection system comprising:
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an overhead projector support assembly extending outwardly from a generally vertical support surface in a generally horizontal disposition;
a display screen having a display surface mounted on said support surface beneath said projector support assembly; and
a projector mounted on said projector support assembly and aimed to project images onto the display surface of said display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An overhead projection system comprising:
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an overhead projector support assembly extending outwardly from a generally vertical support surface in a generally horizontal disposition;
a display screen having a display surface mounted on said support surface beneath said projector support assembly;
a projector mounted on said projector support assembly; and
at least one reflective surface positioned to reflect images projected by said projector onto said display surface. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. An overhead projector support assembly comprising:
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at least one boom adapted to extend outwardly from a generally vertical support surface in a generally horizontal disposition and to support a projector at a location spaced from said support surface;
at least one coupling element adapted to couple pivotally one end of said at least one boom to said support surface to enable said at least one boom to be pivoted downwardly from said generally horizontal disposition under a load; and
a governor to control pivotal movement of said boom in a manner so that said boom pivots downwardly under said load at a generally unconstrained rate and automatically returns to said generally horizontal disposition at a generally constant rate when said load is removed. - View Dependent Claims (34, 35, 36, 37)
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38. A portable overhead projection system comprising:
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a portable upright support member;
an overhead projector support assembly extending outwardly from said support member in a generally horizontal disposition;
a display screen having a display surface mounted on said support member beneath said projector support assembly;
a projector mounted on said projector support assembly, said projector projecting images for display on said display surface, wherein said projector support assembly is pivotable from said horizontal disposition downwardly when a load is placed thereon; and
a governor to control pivotal movement of said projector support assembly in a manner so that said boom pivots downwardly under said load at a generally unconstrained rate and automatically returns to said generally horizontal disposition at a generally constant rate when said load is removed. - View Dependent Claims (39, 40, 41, 42, 43)
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44. An overhead projection system comprising:
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a display screen having a display surface lying in a generally vertical plane;
a boom member extending outwardly in a generally horizontal orientation above said display screen; and
a projector mounted on said boom member, said projector projecting images that are displayed on said display surface. - View Dependent Claims (45)
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46. An overhead projection system comprising:
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a display screen having a display surface lying in a generally vertical plane;
a boom member extending outwardly in a generally horizontal orientation above said display screen, said boom member being pivotable from said generally horizontal disposition downwardly when a load is placed on said boom member;
a projector mounted on said boom member, said projector projecting images back towards said display screen for display on said display surface; and
a pivot control mechanism to return said boom member to said generally horizontal orientation at a generally constant rate when said load is removed from said boom member. - View Dependent Claims (47, 48, 49, 50, 51, 52)
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53. An overhead projection system comprising:
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a display screen having a display surface lying in a generally vertical plane;
a boom member extending outwardly in a generally horizontal orientation above said display screen, said boom member being pivotable downwardly under a load;
a projector mounted on said boom member, said projector projecting images for display on said display screen;
at least one reflective surface on said boom member, said reflective surface reflecting images projected by said projector onto said display surface; and
a pivot control mechanism to return said boom member to said generally horizontal orientation at a generally constant rate when said load is removed from said boom member. - View Dependent Claims (54, 55, 56, 57)
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Specification