IMPROVEMENTS IN THE CONSTRUCTION OF ROTARY PUMPS
Year: 1864

page_text: PROVISIONAL SPECIFICATION left by Edward Myers and Henry Dundas
Gloag at the Office of the Commissioners of Patents, with their Petition
on the 30th January 1864.
We, EDWARD MYERS, of Millbank Row, Westminster, in the County of
Middlesex, Civil Engineer, and HENRY DUNDAS GLOAG, of Pall Mall, in the
County of Middlesex, Gentleman, do hereby declare the nature of the Inven-
tion for "IMPROVEMENTS IN THE CONSTRUCTION OF ROTARY PUMPS," to be as
follows:-
This Invention has for its object improvements in the construction and
arrangement of rotary pumps for raising and forcing water or other fluids to a
height or distance, and for exhausting or withdrawing air or gases;
Invention relates to improvements in the construction of rotary pumps, such
as is described in the Specification of a Patent granted to the said Edward
Myers and to Hugh Forbes, dated 11th August 1863, No. 1975, and also to
the arrangement of rotary pumps described in the Provisional Specification for
which a Patent is now being applied for by us, bearing date December 16th,
1863, No. 3180.
Now our present improvements consist in arranging and constructing the

page_text: case or chamber in which the two rotating toothed drums or wheels described
in the Specifications before referred to, revolve. This case or chamber is so
formed that the inner surfaces of its sides and ends can be adjusted or
regulated when required, so as to fit as close to or be as far from the ends or
sides and the apices of the teeth on the drums as may be necessary to obtain
the result desired, and further the position of the axes of the toothed drums is
also capable of adjustment to compensate when necessary for the wear of the
teeth on the drums or for other purposes. The plan of this adjustment of the
axes of the drums will be explained hereafter in the Complete Specification.
In order that the improvements in the construction and arrangement of the
case or chamber may be more clearly understood, we proceed to explain the
Drawings of it hereto anneved
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dicate similar parts.
Figure 1 shews an elevation of a rotary pump arranged with moveable
adjustable sides and ends according to our Invention, the inner surface of one
side is shewn at Figure 2, and Figure 3 is a longitudinal horizontal section
taken through the middle of Figure 2 along the dotted line.
The section of one of the sides given at Figure 3 shews a bearing and a
stuffing box for the axes A, A, of the drums; the parts marked I represent
india-rubber or other suitable packing or material placed behind a surfaced
metal plate P, which bears against the ends or sides of the toothed drums
when in the case or chamber; the packing behind the plate P is compressed
by screws provided with nuts which bear against the exterior surface of the
side, so that the pressure of the plate P upon the ends or sides of the drums
can be regulated from the exterior when the various parts of the pump are
put together.
Figure 2 is a plan of the inner surface of one of the sides of the case or
chamber I, I, I, I, being the recess for holding the india-rubber or other
suitable packing or material, on the top of which the metal plate p shewn in
Figure 3 is held by the nuts and screws already mentioned.
Figures 4 and 5 represent two views of the adjustable part M introduced
into the end of the case or chamber, which can by means of the nut N acting
on the screw S, compress the india-rubber or other suitable packing or
material I, I; against the plate P' the part M may be brought into close
contact with or be withdrawn from the apices of the teeth by slackening or
tightening the nut N, and the screws and nuts n, n, secure the plate PI to the

page_text: case or chamber as well as aid in perfecting the adjustment of the part M;
b, b, b, are holes for bolts or screws for securing the side (Figures 2 and 3) to
the case or chamber; S is the inlet passage, and O the outlet passage for the
water or other fluid, or air, or gases. Valves may be applied to the inlet and
outlet passages if desired.