: This photograph depicts a mold conveyor made by the Jeffrey Manufacturing Company of Columbus, Ohio, in use at the Pennsylvania Railroad Factory of Altoona, Pennsylvania, in 1931.
The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
: AL01534 Subjects
: Conveying machinery; Coal mining; Coal mines and mining--Ohio; Coal mines and mining--United States; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors--Ohio; Ohio Economy--Economy--Labor Places
: Altoona (Pennsylvania); Columbus (Ohio)