2 Hangers, No. 645 Richards - Wilcox Fire Door Tubular Track Fixtures 21" Long x 9.75" Wide Cast Iron, Bolts included, Wheels in working condition, no cracks. From the catalog "This No. 645 arrangement of Automatic device provides two fusible links – one constantly in opening and expose from both sides, and one link near ceiling. It's either link fuses, door is released. If doors are used on both sides of wall, the cord can meat be made to pass through wall near ceiling at point where it is shown attached in above illustration, and same Arrangement continued on other side that's providing for links. The fusing of anyone releases both doors.
Wheels, apron and brackets are of malleable iron. (lower guide wheels under track prevents derailment.) hangers, 21 in Long. Wheels, 4 in diameter, roller bearing. Weight, purple hair, 20 lb. Weight, track, per foot, 2.25 lb, with brackets paste 2 ft apart.
Number 645 fixtures furnished with two links; number. 646 fixtures, one link only."
