Low cost automatically illuminated document holder
OwnerJohn Pfanstiehlinventor
Life of this patent
Estimating the term…
Loading patent…
OwnerJohn Pfanstiehlinventor
Estimating the term…
A low cost document holder automatically illuminates a document under low light conditions. An energy-saving system having a switch that turns on a lamp when a front cover is at an angle to a rear cover of between 45 and 135 degrees. The lamp is turned off when the angle is less than 45 degrees or greater than 135 degrees to prevent battery drain when the holder is left open or cannot completely close. Optimized lamp positioning places a centerline of a cone of illumination at a maximum of thirty degrees from the front cover to enable use of a low wattage lamp. The resultant low battery drain enables the components to be permanently enclosed in a document holder cover that has the appearance, dimensions and thickness of standard document holders. Advantages of components enclosed within a cover are reliability, ease of cleaning, market entry and low cost manufacture.
A document holder comprising:
A document holder comprising:
A method of automatically providing additional illumination to a document in a low cost document holder having a front cover and a rear cover comprising the steps of:
Dependencies are inferred from the claim text.