A catalogue and price-list of drawing instruments (1892)
Alteneder, Theodore & sons, Philadelphia. [from old catalog] · [Philadelphia, T. Alteneder & sons] · leaf 10
djusted to suit the requirements or fancy of the user, it willhave the same stiffness or feel in all positions, and will retain it. In the cheap imitations of this joint, the friction does not depend uponthe spring pressure of the head. In consequence of this, the joint soonbecomes loose, and any… … Knuckle-joints. Each leg is provided with a knuckle-joint to enable theneedle-point and the pencil or pen to be kept approximately per-pendicular to the paper in making circles o\~ any radius within thecapacity of the instrument. These joints arc carefully fitted andpossess the same stiffness in…
Drawing instruments
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