| 摘要 |
<p>The "PT RULER" is an invention, without which architects, engineers, school students and others would probably continue to read scale rulers upside down. The "PT Ruler" invention improves a number of characteristics of the scales on typical architectural engineering, and school rulers, including 1) an improved orientation of scales for easy viewing, 2} an improved arrangement of scales, 3) improved primary & 4} improved secondary colors of scales, 5) improved font sizes of scales, 6} improved 1/16"=1 ' scale that allows for reading of actual measurements, 7) improved "tick marks" for easier reading, 8} improved numbering for engineering scales, 9) improved physical eight- sided ruler configuration { for the new "PT8 Ruler" and the "PT8E Ruler"), that enables the addition of two additional scales, 10} the addition of two 16" on center scales for the PT8 Ruler, 11 ) the addition of a clear plastic holder for the insertion of special scales, 12) the addition of a 1/4" scale for the PT8E Ruler, 13) the addition of holes for a 3-ring binder and a hook, 14) the addition of a 1/4" scale and a 1"=1G" scale for the PTS ruler, and 15) the removal of 1/16" and millimeter tick marks for easier reading. Although the title is composed of one name, it actually consists of seven different types of PT Ruler, namely, the "PT Ruler" and the "PTE Ruler" (triangular shaped rulers), the "PT8 Ruler" and the "PT8E Ruler" (new 8-sided rulers), the "PTF Ruler" and the "PTFE Ruler" (fiat rulers), and the "PTS Ruler1 {school ruler).</p> |
