Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 463
8«SJ This cut represents a Fan Blower with two mouths or outlets, one larger thanthe other, and is well adapted for use in establishments where steam boilers and forgesare to be furnished with blast from the same blower, the large outlet supplying theboiler and the small one the forces. Si@TD@BJI… … The above cut shows the Self-Oiling Box, and Universal Joint by which it isattached to the Hanger. It will be seen that the Ball Joint is chambered, so as toreceive and contain a mass of sponge or other porous material, for the purpose ofabsorbing a large quantity of oil, holding it in readiness…
