Detail of one of the pulleys and a small counterweight.  This gasometer was manufactured by the Pittsburgh Equitable Meter Company under the brand name EMCO.  The two patent numbers included on a nameplate are dated as being issued in 1929 and 1932, giving this gasometer an approximate manufacture date of the mid-1930’s.  This gasometer was rescued and restored by David Cowgill, Scientific Director of ATOR Labs and when found was covered with red paint and was being used to calibrate natural gas meters, which is probably close to its original purpose.  Photo courtesy of Sieggy Bennicoff-Yundt, Quality Director of ATOR labs.