index-machine

from The Century Dictionary.

• noun A machine provided with an indexing mechanism by which the teeth of gear- or ratchet-wheels can be spaced.
• noun In weaving, a modification of the Jacquard loom mechanism, in which the cards of the original Jacquard device are replaced by a shedding motion, effecting the same results as the cards so far as the pattern is concerned, but affording some advantages not obtainable in the primitive device; a dobby.