Improvements in Rotary Blowers, Exhausters, and Pumps.
Year: 1885

page_text: Improvements in Rotary Blowers, Exhausters, and Pumps.
I JAMES WILLIAM RESTLER of the Southwark and Vauxhall Water Works
Nunhead in the County of Surrey Engineer do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN ROTARY BLOWERS EXHAUSTERS AND PUMPS
to be as follows:-
"
My Invention has for its object to provide a simple construction of rotary blower
exhauster or pump and to render the action thereof more efficient. I provide a
casing with inlet and outlet in which is mounted the shaft carrying the vanes by
which the fluid is drawn into and expelled from the casing. In proximity to the
said vanes is arranged a drum to which motion is given so that it rotates once for
each vane on the shaft. This drum bears upon two abutments which between
them keep the space between the drum and the casing closed against the
passage of fluid from the inlet to the outlet in all positions of the drum. The said
drum is so shaped that the vanes when passing it are always in contact with it
thus forming a closure at this time the closure at other times being formed by the
periphery of the drum being in contact with the main shaft. The casing is prefer-
ably made concentric with the main shaft to as great an extent as possible so as to
reduce to a minimum the space not swept through by the vanes.

page_text: COMPLETE DIECIFICATI
Improvements in Rotary Blowers, Exhausters, and Pumps.
I JAMES WILLIAM RESTLER of the Southwark and Vauxhall Water Works
Nunhead in the County of Surrey Engineer do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My Invention has for its object to provide a simple construction of rotary blower
exhauster or pump and to render the action thereof more efficient than that of those
hitherto constructed. I will describe my Invention with reference to the accom-
panying Drawing. Figure 1 of which represents in vertical section a rotary blower
exhauster or pump constructed according to my invention. I provide a casing A
with inlet and outlet (B and C respectively) in which casing is mounted the shaft
and drum D carrying the vanes E by which the fluid is drawn into and expelled
from the casing A. In proximity to the said vanes E is arranged a recessed drum F
to which motion is given so that it rotates once for each vane E on the shaft D.
This drum F bears upon two abutments G which between them keep the space
between the drum and the casing closed against the passage of fluid from the inlet
to the outlet in all positions of the drum. It will be obvious that there may be one
or more than two abutments if desired for example the two abutments shewn may
be continued in one to give a continuous bearing of the drum F upon the abutment
so formed The said drum F and the vanes E are so shaped that the said vanes E
when passing the said drum F are always in contact with it at the point F' thus
forming a closure at this time the closure at other times being formed by the
periphery of the drum F being in contact with the drum D. The casing A is
preferably made concentric with the main shaft to as great an extent as possible so
as to reduce to a minimum the space not swept through by the vanes E.
•
It will be evident that although I have shewn two vanes E that other number
may be employed the revolutions of the shaft D and drum F being relatively
arranged so that there is one revolution of the drum F for each of the vanes E.
Instead of making only one recess in the drum F and causing it to make a com-
plete revolution for each vane on the drum D, I may make more than one recess
in the drum F examples of this are shewn in Figures 2 and 3 Figure 2 shewing
four recesses and Figure 3 shewing two recesses in the drum F. The shafts of the
drums D and F must in these cases of course be rotated at such relative speeds that
a recess in the drum F is presented for each vane E of the drum D. The arrange-
ment Figure 2 therefore necessitates the shaft of the drum D being rotated twice
for every revolution of the shaft of the drum F and the arrangement Figure 3
necessitates both shafts being driven at the same speed.
The details also may be somewhat varied for example the abutment G instead of
being part of the casing or of its base as shewn may be a separate piece fixed
thereto.
The curvature or formation of the vanes E as shewn is very favorable to the
prevention of undue alteration of the capacity of the spaces behind the vanes whilst
they are passing the drum F.

page_text: Figure 4 is a side elevation of the machine. Figure 3 to shew the gearing of the
shafts.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is-
A rotary blower exhauster or pump consisting of the combination of a casing A
with outlet and inlet a rotary shaft (D) with curved vanes (E) and a recessed
drum F cooperating with the said vanes and shaft and bearing on an abutment or
abutments substantially as herein before described and illustrated by the accom-
panying drawings.