The pattern maker's assistant : embracing lathe work, branch work, core work, sweep work, and practical gear construction : the preparation and use of tools : together with a large collection of useful and valuable tables (1878)
Rose, Joshua · New York : D. Van Nostrand · leaf 183
shows a sort of universal core bore, em- ployed for making these cores. A is a cast iron plate, laid uiDon the floor of the foundry, generally in close prox- imity to the mold ; upon this are set up two stout boards, B, about two inches thick. These boards are adjustable, so as to take in any… … column ; the height of the core is regulated by means of the strike, E. On account of the exceedingly fragile na- ture of a green sand core, it is necessary to imbed within it a strong bar of cast iron, called a core bar, such as is re- l)resented at F, Fig. 175. It consists of a strong center bar…
Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
