초록 ▼

A portable supporting device is provided and has a frame having an upper and lower surface with a transparent sheet member secured in a recess in the upper surface and a plurality of hollow tubes providing leg mounting means on the lower surface of the frame adjacent each corner thereof with four of

A portable supporting device is provided and has a frame having an upper and lower surface with a transparent sheet member secured in a recess in the upper surface and a plurality of hollow tubes providing leg mounting means on the lower surface of the frame adjacent each corner thereof with four of the hollow tubes cooperating when legs are provided therein to form a portable table for supporting a book for reading in bed and a different four of the hollow tubes cooperating when legs are provided therein to form a table for providing a portable lap writing surface.

대표청구항 ▼

Apparatus for use as a portable supporting device comprising: a generally rectangularly shaped frame having a central opening and a length greater than its width; said frame having an upper surface and a lower surface; an inner recess formed in said upper surface of said frame to provide a generally

Apparatus for use as a portable supporting device comprising: a generally rectangularly shaped frame having a central opening and a length greater than its width; said frame having an upper surface and a lower surface; an inner recess formed in said upper surface of said frame to provide a generally rectangular support ledge surrounding said central opening; a transparent sheet member positioned on said support ledge and secured thereto; said frame having at least four side members, two of which extend in a lengthwise direction and two of which extend in a widthwise direction; said two lengthwise extending side members and said two widthwise extending side members being joined together to form four corners; a plurality of fixedly mounted leg mounting means projecting downwardly from said lower surface of said frame adjacent to each of said four corners; four of said leg mounting means cooperating for use of said apparatus for one purpose and comprising; a first pair of leg mounting means each having an included angle between its longitudinal axis and the lower surface of each of said two widthwise extending side members of x degrees and an included angle between its longitudinal axis and the lower surface of one of said two lengthwise extending side members of x1 degrees; a second pair of leg mounting means each having an included angle between its longitudinal axis and the lower surface of each of said two widthwise extending side members of x2 degrees and an included angle between its longitudinal axis and the other of said two lengthwise extending side members of about x3 degrees; four of said leg mounting means cooperating for use of said apparatus for a different purpose and comprising; a third pair of leg mounting means each having an included angle between its longitudinal axis and the lower surface of each of said two widthwise extending side members of x4 degrees and an included angle between its longitudinal axis and the lower surface of one of said two lengthwise extending said members of x5 degrees; a fourth pair of leg mounting means each having an included angle between its longitudinal axis and the lower surface of each of said two widthwise extending side members of x6 degrees and an included angle between its longitudinal axis and the other of said two lengthwise extending side members of about x5 degrees; each of said x, x1, x2, x3, x4, x5 and x6 degrees being a different number; and a leg secured to at least two of said leg mounting means at said corners.