CARRON IRON WORKS, STIRLINGSHIRE

Blowing engine for Carron [blast] furnace No. 1. [tub blowers and tuyeres].

Elevation and plan, 1:24; details, 1:12. Ink wash. [1764].

Inscr.: (F.) See Mr. Smeaton's letter to Dr. Roebuck, 13 June 1764, sent with this design and some explanation; see General Letter Book, V. 134. This design was adapted to the old water wheel 27 ft. diam.

A machine was executed in a different manner, see LB8, 111-125, for a new furnace, No. 3 with only two cylinders. No. 1 was afterwards altered to this plan in 1768 (LR9. 25 and 10.177), but with a cast iron spur wheel instead of wood. In 1769 the axis of the water wheel broke and Mr. Smeaton recommended an axis of cast iron, see his sketch fol. SMEATON/70v; also to make a new water wheel 20 feet diameter and lay aside the cog wheels, but the machine was repaired as before and set to work again before mid-summer, 1769 (see LR10.177).

Note: In 1771 the above mentioned machine No. 3 with two cylinders was rebuilt on this plan with the old water wheel 27 ft. diam., 4 ft. 9 in. broad and set to work at the latter part of 1770. Four cylinders 53½ ins. diam., 4½ ft. stroke.