IMPROVEMENTS IN ROTARY PUMPS.
Year: 1883

page_text: t
LETTERS PATENT to Samuel George, of Warwick Square, in the County of
Middlesex Engineer for an Invention of IMPROVEMENTS IN ROTARY PUMPS.
.
PROVISIONAL SPECIFICATION left by the said Samuel George at the Office
of the Commissioners of Patents on the 21st August-1883.
:
SAMUEL GEORGE, of Warwick Square, in the County of Middlesex, Engineer,
"IMPROVEMENTS IN ROTARY PUMPS."
"
My invention relates to rotary pumps, and it is designed to construct a pump,
which may be effectively driven at low speeds, or by manual power, and wherein
the direction of the flow may be reversed by merely reversing the direction of
rotation.
The nature of my said invention, is as follows:-
Within a suitable chamber, provided with proper inlet and outlet, is mounted.a
drum or cylinder, having on its periphery a suitable number of pointed projections,
conveniently two and equidistant. The points of these projections revolve in
water tight contact with the curved inner and upper surface of the chamber. In
the lower part of the chamber is mounted on an axis, parallel to that of the drum
aforesaid, a drum valve with alternate recesses, to form seatings for the revolving
drum and its projections. The recesses seating the drum are of a concavity corre
sponding to the convexity of the drum, and the concavity of the recesses to receive
the projections is that of the curve generated by the point of the projections, so
that in both cases the contact is as near as may be water tight. The valve is
stationary whilst in contact with the drum, but when a projection enters a recess,
the valve is carried over a portion of a revolution, and a fresh seating is brought
under the drum, whilst the projection commences a fresh revolution, and creates
behind it the necessary vacuum for the suction of the liquid, which is carried over

page_text: and delivered at the outlet, just before the projection-ongages with the valve. The
drum is recessed at the roots of the projections in a curve generated by the
revolution of the corners on the druin valvo resulting from the alternate recesses.
In some cases, as for instance where the pump is made of earthenware, I recess the
contact surfaces, and fit them with suitable elastic packing strips to increase the
water tight contact.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel George in the Patent Office on the 20th February 1884.
SAMUEL GEORGE, of Warwick Square, in the County of Middlesex, Engineer,
IMPROVEMENTS IN ROTARY PUMPS
My invention relates to rotary pumps, and it is designed to construct a pump
which may be effectively driven at low speeds, or by manual power, and wherein
the direction of the flow may be reversed by merely reversing the direction of
rotation.
The nature of my said invention is as follows ;-
Within a suitable chamber provided with proper inlet and outlet, is mounted a
disk, drum or cylinder having on its periphery a suitable number of pointed
projections, conveniently two and equidistant. The points of these projections
revolve in water tight contact with the curved inner and upper surface of the
chamber. In the lower part of the chamber is mounted on an axis, parallel to that.
of the drum aforesaid, a drum valve with alternate recesses, to form seatings for
the revolving drum and its projections. The recesses seating the drum are of a
concavity corresponding with the convexity of the drum, and the concavity of the
recesses to receive the projections is that of the curve generated by the point
of the projections so that in both cases the contact is as near as may be water
tight. The valve is stationary whilst in contact with the drum, but when a
projection enters a recess the valve is carried over a portion of a revolution and a
fresh seating is brought under the drum, whilst the projection commences a fresh
revolution; and creates behind it the necessary vacuum for the suction of the
liquid which is carried over and delivered at the outlet, just before the projection
engages with the valve. The drum is recessed at the roots of the projections in a
curve generated by the revolution of the corners on the drum valve resulting from
the alternate recesses. In some cases; as for instance, where the pump is made of
earthenware, I recess the contact surfaces, and fit them with suitable elastic packing
strips to increase the water tight contact. To facilitate the cliarging of the pump,
I sometimes tit a suitable screw plug in a hole at the top of the chamber and can
thus fill the body of the pump with liquid before commencing work. I may also
when desirable fit a valve of any known form to the suction pipe, and an air vessel
to the delivery pipe.
And having described and ascertained the nature of my invention and the

page_text: manner in which the same may be carried into effect be it known that what
I consider novel and desire to protect by Letters Patent is :-
.
First, the construction of a pump by the combination in a suitable containing
chamber of a disk, drum, or cylinder having teeth or projections fitting into recesses
in a drum valve rotating on an axis parallel to that of the said disk drum or
cylinder substantially as described.
Secondly the construction of a reversible pump by the combination of one or
more teeth or projections revolving in either direction as desired through a curved
channel propelling the fluid in front through an outlet and sucking it in from
behind through an inlet substantially as described
In witness whereof I the said Samuel George have hereunto set my hand and
seal this twentieth day of February in the year of our Lord one thousand, eight
hundred and eighty four
Witness to the Signature of
the said Samuel George
STEPHEN HEMMEN,
8 Argyle. Street W
Electrical Engineer
S. GEORGE. (LS.)