{
  "$type": "site.standard.document",
  "description": "The levelling rod (1) has a plurality of bars (11) therealong and serving to express a position along the levelling rod, each bar having a width (Wx) taken from a set of width values. The pitch between two adjacent bars (11) is a variable value, and selected from a set of predetermined pitch values…",
  "path": "/patents/1072678",
  "publishedAt": "2005-11-09T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C15/06",
    "LEICA GEOSYSTEMS AG [CH]"
  ],
  "textContent": "The levelling rod (1) has a plurality of bars (11) therealong and serving to express a position along the levelling rod, each bar having a width (Wx) taken from a set of width values. The pitch between two adjacent bars (11) is a variable value, and selected from a set of predetermined pitch values (p1, p2), such that the position along the levelling rod is expressed in terms of the following two parameters: i) the width (Wx) of at least one bar, and ii) at least one pitch value separating adjacent bars. In an embodiment, the level has a set of coded height bar blocks provided with a constant length along the length measuring direction of a level to digitally indicate heights. Each bar block comprises 3 bar symbols which are aligned at two different pitches. The width dimensions of the bar symbols, with the selected constant pitch values determines that any 3 adjacent bar symbols in the longitudinal direction of the levelling staff is different from any other 3 adjacent bar symbols chosen from any other portion of the barcode scale. The invention also relates to a level determination apparatus specifically adapated for that levelling bar, and to a method of using of that apparatus.",
  "title": "Levelling rod and level determination apparatus and method e.g. for geodetic applications"
}