Overlap distance indicating device

A device for allowing a worker to lay out parallel lines which are to be disposed apart throughout by a constant distance S, and which lines include parallel but offset sections joined by intervening angled sections with one of the lines of each of said offset sections being extended to overlap the other by a distance D in order to maintain said lines parallel and spaced throughout by said distances S, said device comprising in combination:

• first disc means having indicia disposed on one surface thereof in radially extending columns with selective columns of said indicia corresponding to measurements of the run and slope of said angled sections, and indicia disposed on another surface thereof in radially extending columns corresponding to measurements of said overlap distance D;
• second disc means disposed over said one surface of said first disc means in concentric relation therewith and being relatively rotatable thereto, said second disc means having first window means disposed thereon for exposing individual columns of said indicia of said one surface, said first window means having indicia disposed adjacent thereto which corresponds to measurements of the rise of said angled sections;
• and
• third disc means disposed over said another surface of said first disc means in concentric relation therewith and being relatively rotatable thereto, said third disc means having second window means disposed thereon for exposing individual columns of said indicia of said other surface, said second window means having indicia disposed adjacent thereto which corresponds to measurements of said constant distance S, thereby to allow a worker to read directly from said second window means, from a single setting of said device, the requisite amount of overlap D for a specific spacing S when the corresponding value of the measured run or slope of said columns of indicia is in alignment with the corresponding value of the measured rise of said angled sections indicated adjacent to said first window means.

A device for allowing a worker to lay out parallel lines which are to be disposed apart throughout by a selected constant distance S, and which lines include parallel but offset sections joined by intervening angled sections with one of the lines of each of said offset sections being extended to overlap the other by a distance D in order to maintain said lines parallel and spaced throughout by said distance S, said device comprising in combination:

• a first plurality of indicia means for indicating measurements corresponding to at least two of the run or the rise, slope and angle of said angled sections;
• a second plurality of indicia means for indicating measurements corresponding to a plurality of different distances S;
• means for effecting movement between a first of said at least two measurements of said first plurality of indicia means relative to a second of said at least two measurements of said first plurality of indicia means;
• and
• means responsive to the movement of said last-mentioned means for indicating the requisite amount of overlap D for a selected one of said plurality of different distances S.

A device for allowing a worker to lay out parallel lines which are to be disposed apart throughout by a constant distance S, and which lines include parallel but offset sections each including a run B and slope C and being joined by intervening angled sections defined by angles a, with one of the lines of each of said offset sections being extended to overlap the other by a distance D in order to maintain said lines parallel and spaced throughout by said distance S, said device comprising in combination first, second and third discs, means for rotatably mounting said first disc between and relative to said second and third discs, said first disc having opposite first and second surfaces, said first surface having thereon a first plurality of radially extending columns of first indicia means for corresponding to linear measurements of the runs of angled sections, said first surface having thereon a second plurality of radially extending columns of second indicia means for corresponding to linear measurements of the slopes of angled sections, said first and second indicia means being disposed on opposite semicircular surface portions of said first surface, an outermost ring of third indicia means on said first surface for corresponding to angular measurements of the angle defined by the runs and slopes, first and second window means in said second disc for exposing said first and third indicia means therethrough, respectively, and third and fourth window means in said second disc for exposing said second and third indicia means therethrough, respectively, fourth and fifth indicia means for corresponding to the rises of angled sections disposed adjacent said first and third window means, said second surface have upon a semicircular surface portion thereof sixth indicia means in the form of a plurality of radially extending columns of indicia for corresponding to linear measurements of overlapped distances of the offset sections, first and second concentric rings of seventh and eighth indicia means on said second surface for corresponding to angular measurements of angled sections and for corresponding to an angled factor of angled sections, respectively, said third disc having fifth, sixth and seventh window means for exposing said sixth indicia means, said seventh indicia means and said eighth indicia means, respectively, and ninth indicia means for corresponding to overlap distances of the angled sections disposed adjacent said fifth window means whereby knowing a distance S, rise A and the slope C or run B of a particular angled section or the slope C relative to the rise A or the run B relative to the rise A or the angle a of a particular angled section the requisite amount of overlap D can be determined.