 The Bliley Electric Company , a manufacturer of crystal oscillators used in radio transmitters and receivers , moved from 8th and Peach streets to space on the second floor of Union Station in 1933 . Despite the possibility that soot and vibrations from passing locomotives could cause calibration problems for Bliley 's quartz crystals , Union Station 's proximity to the railroad provided " efficient transfers of [ the ] heavy crystal stock from the train to the [ crystal ] slicing department . " Bliley Electric soon grew to occupy the entire second and third floors of the station . During World War II , the company operated 24 hours a day and employed local women to grind and fashion the crystals ; the crystals used in the operation were stockpiled in the rail yard , where it and the entire complex were guarded by soldiers with Great Danes . Bliley Electric eventually moved its entire operation to a larger , purpose @-@ built facility in 1966 . 
