[f. BEAM sb.1 + -ER1.] One who works with a beam; e.g., one who arranges yarn on the beam of the loom.
1879. Temple Bar, LV. 453. You must find some one else to overlook the beamers.
1884. Graham, in U. P. Mag., July, 350, Crofters, beamers, weavers, and traders came forward.