Improvements in Pumps.
Year: 1893

page_text: Date of Application, 12th Sept., 1893
Complete Specification Left, 12th June, 1894-Accepted, 14th July, 1894
Improvements in Pumps.
We, JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOHN WALLACE
JAKEMAN, Engineers, of Greenwich Road, Greenwich, in the County of Kent, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to the construction of valves for pumps and consists in so
strengthening them that they are not injured by the seats or gratings upon which
they work and their elasticity is not impaired. One method of carrying out our
invention is as follows-While the rubber or other material is in a plastic state in
the mould we insert one or more steel rings, which are embedded in the material.
The rings being concentric with the edge of the valve do not prevent the edge
turning up and opening but prevent the valve from being forced through the
grating or seat. In some cases we introduce the wire in the form of a volute.
Although we have described the construction as applied to valves in which the.
centre of the valve is secured and the edge allowed to rise, our invention is also
applicable to valves which rise bodily from their seats.
We do not restrict ourselves to the use of steel wire as it is evident other material
may be used in a similar manner for the purpose described.
Dated this Twelfth day of September 1893.
J. C. MERRYWEATHER.
C. J. W. JAKEMAN.
Improvements in Pumps.
We, JAMES COMPTON MERRYWEATHER, and CHRISTOPHER JOHN WALLACE:
JAKEMAN, of the Firm of Merryweather & Sons Limited, of Greenwich Road,
Greenwich, in the County of Kent, Engineers, 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 relates to the construction of valves for pumps, and consists in so
strengthening them that they are not injured by the seats or gratings upon which
they work, and their elasticity is not impaired.
One method of carrying out our invention is as follows:-
While the rubber or other material is in a plastic state in the mould we insert
one or more steel rings, which are embedded in the material. The rings being
concentric with the edge of the valve do not prevent the edge turning up and
opening, but prevent the valve from being forced through the grating or seat.
some cases we introduce the wire in the form of a volute.
In.
Although we have described the construction as applied to valves in which the
centre of the valve is secured and the edge allowed to rise. Our invention is also-
applicable to valves which rise bodily from their seats.
We do not restrict ourselves to the use of steel wire as it is evident other material
may be used in a similar manner for the purpose described.
Referring to the annexed sheet of drawings,-
Figure 1, is an elevation of the valve, half in section and half an outside view.
Figure 2. is a sectional plan taken on the line x x of Figure 1.

page_text: Figures 3 & 4,-are views similar to Figures 1 & 2, shewing an alternative
device.
With reference to Figures 1 & 2, A is the rubber valve, and B B are the steel
rings embedded in the rubber when in a plastic condition. C is the valve grating
and D the guard.
In Figures 3 & 4, E is the valve, and E E the steel wire in the form of a volute,
also embedded in the rubber when in a plastic condition.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st. The application of metallic rings embedded in a valve in such a manner as
not to destroy its flexibility.
2nd. The employment of a volute of wire substantially as and for the purpose
described.
Dated this 12th day of June 1894.
J. C. MERRYWEATHER.
C. J. W. JAKEMAN.