from The Century Dictionary and Cyclopedia
- n. A device employed in some looms to lay in, piece by piece, a. filling of slats, whalebone palm-leaf, or other stiffening material.
- n. An early arrangement for stopping a loom in case of the failure of the weft-thread.
Sorry, no etymologies found.
If the weaver fails to do so and the pirn empties, the absence of weft is usually detected by a weft-fork detector system.