https://www.ausimm.com/publications/conference-proceedings/the-ausimm-proceedings-1913/cast-iron-brackets-or-chairs-for-centre-guide-or-runner-supports-in-kintore-shaft-central-mine-broken-hill-n.s.w
Cast-iron brackets or chairs for centre-guide (or runner) supports in Kintore Shaft, Central Mine,...
KINTORE shaft is timbered with 10 x 10-in. oregon frame sets, 13 ft. 8 in. x 9 ft. 6 in. in the clear, placed horizontally and separated by upright studdles 6...
cast iron bracketschairscentreguiderunner