Indispensable for architects and technical designers in general; for the dimensioning and description of the projects, it was good practice to use the "spider" to obtain well written and uniform texts.
The stylus or rapidograph is inserted and locked onto an arm. A second arm has a pin that follows the letters or numbers engraved on a plastic stick that acts as a guide. A third arm has a pin that slides along the bottom linear groove to help keep the letters aligned horizontally. The slats are available with letters of different heights and characters. By adjusting the angle of the pin you can write texts with slanted letters.
In the left arm there is the tracer, it is inserted in the grooved shapes of the letters on the model cue.
The right arm is positioned above the paper, is adjustable and has a clamp to hold the nib firmly. The black toothed wheel in the center is used to adjust the opening of this arm, there is an adjustment that changes the inclination of the letters allowing you to write in italics.
From this point of view it is not seen but in the lower part under the handle there is a pin that inserted in the track of the stick allows the linear scrolling of the writing, as if it were in a track allows you to write perfectly aligned.
KEUFFEL & ESSER LEROY LETTERING SET
Leroy Lettering Set by Keuffel & Esser Co. was a marvel in its day. Most of all EC's illustrated comics and classics were written with this. The letters were drawn individually by Leroy with a stylus, at the same time reproducing an exact duplicate of each letter on the drawing pad. An experienced user wrote quickly and accurately.
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