Improvements in Rotary Apparatus for Blowing, Exhausting, and Pumping.
Year: 1893

page_text: Date of Application, 17th Mar., 1893
Complete Specification Left, 14th Sept., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Rotary Apparatus for Blowing, Exhausting, and
Pumping.
We FREDERICK HARVARD STACEY, Heeley Bridge Foundry, Manufacturer,
aud HENRY WILKINSON, of the same address Engineer, both of Sheffield in
the County of York, do hereby declare the nature of our invention to be as
follows:-
Our invention is for improvements in the construction of blowing, exhausting
and pumping apparatus, the object being to simplify the construction, and to
economise labour.
The blower, exhauster, or pump consists of two revolving drums enclosed in a
corresponding casing, the upper drum being provided with two vanes and the lower
drum with two recesses or openings; both drums are carried by their respective
shafts and are driven by wheels of an equal number of teeth geared together.
The vanes may be cast with and form part of the upper drum but we prefer to
make them separately and bolt the parts together.
The vanes sweep the inner surface of the upper part of the casing and in the
lower part they enter the openings in the lower drum which forms the block
between the entrance and the exit. The body of the upper drum and the surface
portion of the lower drun between the openings are of the same diameter, and arc
practically in contact with each other as the drums revolve.
የነ
The opening in the lower drum have to be made wide enough to enable the
vanes on the upper drum to enter and leave, and to prevent the passage of air
water as the case may be round the vane, we use a segmental plate on each side of
the vane, which form a joint with the edges of the said openings.
The lower drum is divided into two compartments by a crossplate extending
from end to end, and we make a recess in each end of the casing to receive the
ends of the bottom drum which extend past those of the upper drun, this arrange-
ment being to permit the return of compressed air from one side of the chamber to
the other, caused by the passage of the vane.
Although we have described the apparatus as consisting of an upper and a lower
drum, we may use two pairs of drums, the upper drums having their vanes arranged
at opposite angles to counterbalance each other, and divide the casing by a
transverse partition.
T
1000
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Rotary Apparatus for Blowing, Exhausting, and
Pumping.
We FREDERICK HARVARD STACEY, Heeley Bridge Foundry, Manufacturer,
and HENRY WILKINSON, of the same address, Engineer, both of Sheffield in the
County of York 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 :-
Our invention is for improvements in the construction of rotary blowing,

page_text: exhausting, and punsping apparatus, the object being to simplify the construction,
and to economi-e labour in the manufacture of such machines.
The annexed sheet of drawings illustrates one of our improved blowers, in
which:
Fig. 1, is a transverse section through the casing and the two drums.
Fig. 2, a side elevation of same--part being shown in section.
Fig. 3, a modification in the vane.
The blower exhauster or pump as the case may be consists of an outer casing 3,
which encloses two revolving drums, the upper one marked 1, the lower 2.
The top drum 1, is provided with two valves or blades 4 and 5, and the lower
drum 2, with two recesses or openings 6 and 7, opening into the interior which is
divided by a cross wall 16. Both drums are carried by their respective shafts 8
and 9 supported in bearings 8 and 9, and are driven or rotated by the wheels 10
and 11-having an equal number of teeth, and being geared together so that both
drums revolve at the same speed.
The vanes 4 and 5 may be east with and form part of the upper drum 1, as
shown in Fig. 1, but in some cases and especially in the larger machines we prefer
to make them separately and attach them to the drum which is suitably prepared
to receive them, as shown in Fig. 3, this plan is more convenient for machining the
said parts and for repairs.
The edges of the vanes sweep the inner surface 12, of the upper portion of the
casing, and in the lower part of their travel they enter the openings 6 and 7 in the
lower drum 2, the periphery of which forms the block in the passage between
the entrance 13, and the exit 14.
The circular part or body of the top drum, and the corresponding part of the
lower drum between the openings are the same diameter, and come in practical
contact when revolving.
The openings 6 and 7 are made wide enough to enable the vanes of the upper
drum to enter and leave when revolving; and to prevent the passage of air or
water as the case may be, round the vane, we use a segmental face 15, Fig. 1, or
rib or plate as in Fig. 3, on each side of the vane, which is in contact with and
forms a joint with the edge of the opening at a portion of the revolution.
The lower drum is divided into two compartments or chambers by means of a
cross plate 16, which extends from end to end of the drum, and we make a recess 17,
at each end of the casing to receive the ends of the bottom drum and extending
also at each side of the bottom drum in the end casing as shown and marked 17.
This novel arrangement forms a passage and permits the air to move freely round
the vanes as they enter, pass through and recede from the lower drum 2, otherwise
the air would be compressed and interfere with the steady working of the
machine.
Although we have described the apparatus as consisting of one upper and lower
drum, we may use two pairs of drums, the upper drums having their vanes arranged
at opposite angles so as to counterbalance, and the lower drums having their
openings to match the casing would be divided vertically by a transverse partition.
The construction of the casing may be varied.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same may be performed and carried into practice,
we declare that what we claim is:-
1. A blowing, exhausting, or pumping machine, arranged and constructed in
the manner hereinbefore described and as illustrated in the annexed drawings.
2. In a rotary blower, exhauster, or pump, the construction of the two equal
speed drums, in combination with the end recesses or paths 17 in lower part of
casing and drum for the purpose specified substantially as hereinbefore described
and shown.

page_text: 3. In a rotary blower, exhauster or pump, a recess constructed at one or both
ends of the chambered drum, and in the casing, (such as 17 in the drawings) for
the purpose hereinbefore specified.
Dated the 6th day of September 1893,
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.