s ▁were ▁developed ▁for ▁electric ▁locomot ives . ▁ ▁By ▁ 1 9 2 8 , ▁" p ract ically ▁all ▁locomot ives ▁and ▁passenger ▁cars ▁built ▁in ▁the ▁United ▁States " ▁were ▁made ▁using ▁products ▁manufact ured ▁at ▁the ▁Commonwealth ▁plant . ▁ ▁Mer ger ▁ ▁An ▁April ▁ 1 2 , ▁ 1 9 2 9 ▁St . ▁Louis ▁Post - Dispatch ▁newspaper ▁article , ▁repr int ed ▁in ▁the ▁April ▁ 1 9 2 9 ▁issue ▁of ▁The ▁Common we al ther , ▁noted ▁"[ t ] he ▁Commonwealth , ▁largely ▁because ▁of ▁its ▁one - pie ce ▁cast ings , ▁does ▁business ▁with ▁rail ro ads ▁all ▁over ▁the ▁world . ▁It ▁is ▁commonly ▁thought ▁not ▁to ▁have ▁a ▁compet itor ▁in ▁the ▁production ▁of ▁a ▁one - pie ce ▁frame ▁for ▁locomot ives ▁and ▁coach es , ▁a ▁fe at ▁of ▁casting ▁that ▁has ▁at ▁once ▁made ▁its ▁business ▁unique ▁and ▁added ▁imm ens ely ▁to ▁the ▁safety ▁of ▁rail road ▁travel ." ▁ ▁The ▁importance ▁of ▁Commonwealth ▁Ste el ▁to ▁the ▁rail road ▁industry ▁was ▁not ▁over look ed ▁by ▁the ▁industry ▁and ▁was ▁unders cor ed ▁when ▁two ▁major ▁locomot ive ▁companies , ▁American ▁Lo comot ive ▁Company ▁and ▁Bald win ▁Lo comot ive ▁Company , ▁along ▁with ▁the ▁American ▁Ste el ▁Found ries , ▁organized ▁General ▁Ste el ▁Cast ings ▁Corporation ▁in ▁ 1 9 2 8 ▁and ▁subsequently ▁purchased ▁Commonwealth ▁Ste el . ▁ ▁The ▁April ▁ 1 9 2 9 ▁issue ▁of ▁The