What made this device so fast? It was the Charactron Tube which we covered back in 2017. Charactron Tube Diagram (US Patent 2735956) While this printing speed was certainly impressive, the ability to plot entire graphs and figures in just fractions of a second was no doubt well appreciated by the scientists at Dahlgren. But despite this wait time, the printing speed was much faster than line printers of the day: 7000 lines per minute vs 150. Since they used film, they required chemical processing to become photos, slides, or microfilm. Perhaps you’ve heard stories of programmers waiting impatiently for printouts from mainframe operators? Well you would have waited even longer for your optical plots. The separation distance will be adjusted so that an integer number of cuts is made inside the rectangle in the x-direction.SC4020 Computer Recorder Information Manual The cut length will be adjusted so that an integral number of cuts is made inside the rectangle in the y-direction.

Separation distance (x): This is the separation in the x-direction between successive lines of cuts. Gap length (y): This is the distance in the y-direction between adjacent cuts. The extension dialog has a few parameters to set.Ĭut length (y): This is the length of each cut in the hinge. It is accessed by the menu Extensions->Render->Living Hinge The rectangles must be selected before accessing the extension.

Each set of cut lines for a hinge are created as a single path. Each rectangle will be filled with cut lines for a living hinge.

You select one or more rectangles in the SVG document. On Windows you will find an inkscape/extensions directory in the program files directory. On Linux it is located somewhere like /usr/share/inkscape/extensions. īoth files need to be put in the Inkscape extensions directory. To install the extension in Inkscape two files are needed:īoth are available from GitHub in a zip file. The pattern of cuts in these hinges are typical of those used to make a living hinge. It is an extension to the popular SVG graphics program Inkscape.

The Living Hinge Inkscape extension is a project by Mark Endicott to automate the process of drawing the cut lines needed to form a living hinge. A living hinge is a way to make rigid materials like plywood and acrylic sheets flexible by making cuts in the material.

Must have inkscape extensions