Primarily
built for telephone exchanges where absolute quietness
of operation was essential. It was also recommended
for uses similar to the No.4. This model was standard
with the Bell Telephone System.
Design Specifications:
WEIGHT - 115lb LENGTH - 31"
Construction Features:
Suction was produced
by 4 revolving fans on the same shaft with the
motor armature.The drum and separator were very
large
An outlet connection below the motor allowed the vaccum
to be used as a blower.
The aluminum end plate was hinged at the center, the
upper half being easily dropped for the removal of the
dust screen.