Water precipitation dust separator used in the pearl button industry. Note the stean pipe for winter use to keep the water from freezing in the separator.

the collector is derived he

...

Shows course of dust laden air into the dust collector and cleaned air out of the
collector. Cut marked " discharging" shows method of snapping bags and reversing air
current through valve "G." (Courtesy of Allis-Chalmers Mfg. Company, Inc.)

Sectional End Elevation showing method
of arrangement of filter bags of Allis-
Chalmers dust collector. (Courtesy of
Allis-Chalmers Mfg. Company, Inc.)

Typical installation of an Allis-Chalmers dust collector in a fine grinding plant (cement) handling dust from elevators, screens, grinding-mill and packers. (Courtesy of Allis-Chalmers Mfg. Company, Inc.)

Modera dust separator, consisting of a series of
cloth screens which separate the dust from the air.
The screens are vibrated mechanically which removes
the clinging dust to the receiving hoppers beneath the
separator. (Courtesy of Pangborn Corporation, Hag-
erstown, Md.)

Modern hygienic sand blasting apparatus. Note
edge of the revolving table on which castings are
placed to revolve into the cabinet without exposing
the operator OP surrounding workmen to dust.
(Courtesy of Pangborn Corporation, Hagerstown, Md.)

Line perspective of a modern sand blast installation.
poration, Hagerstown, Md.)

(Courtesy of Pangborn Cor