View Original: | Senator John Heinz History Center - IMG 7820.JPG (3264x2448) | |||
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Keywords: Senator John Heinz History Center - IMG 7820.JPG Patent model for Westinghouse's air brake 1869 Exhibit in the Senator John Heinz History Center 1212 Smallman Street Pittsburgh Pennsylvania USA There were no restrictions on photography in the museum collections I took this photograph 2010-12-02 16 28 17 Daderot Public domain Senator John Heinz History Center George Westinghouse Railway air brake |