Improvements in Valves for Pumps and other purposes.
Year: 1890

page_text: Date of Application, 4th Nov., 1890
Complete Specification Left, 2nd June, 1891-Accepted, 4th July, 1821
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pumps and other purposes.
I JOHN KERSHAW HILL of West Surrey Water Works, Walton-on-Thames
in the County of Surrey, Mechanical Engineer do hereby declare the nature of this
invention to be as follows:-
The object of the invention is to improve the construction and durability of
parts of valves used in pumping and other apparatus.
In valves at present in use a disc of vulcanized or cured india-rubber is employed
and arranged to strike, rest on, and be removed from the ribs of the passage way
through the bucket, or operate in equivalent manner but such discs are expensive,
difficult to manufacture of the best quality and are costly and troublesome in
renewal.
According to my invention I form my discs mainly of pear wood, boxwood or
other suitable like material not expensive and readily shaped accurately to require-
ment and formed with an annular recess around the lower or working edge adjacent
to the meeting surface of the grid, or passage way for fluid and within this annular
recess I fit an annulus of india rubber or like resilient material or composition of
materials preferably shaping the inner part of the recess dovetail or locking so
that with the aid of a suitable cement a fast and lasting union between the wood
or more rigid material and the resilient addition thereto may be secured.
Dated the 4th day of November 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Valves for Pumps and other purposes.
1 JOHN KERSHAW HILL of West Surrey Water Works, Walton-on-Thames
in the County of Surrey, Mechanical 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 :-
The object of the invention is to improve the construction and durability of
parts of valves used in pumping and other apparatus.
In valves at present in use a disc of vulcanized or cured india-rubber is employed
and arranged to strike, rest on, and be removed from the ribs of the passage way
through the bucket, or operate in equivalent manner but such discs are expensive,
difficult to manufacture of the best quality and are costly and troublesome in
renewal.
According to my invention I form my discs mainly of pear wood, boxwood or
other suitable or like material not expensive and readily shaped accurately to
requirement and formed with an annular recess around the lower or working edge
adjacent to the meeting surface of the grid, or passage way for fluid and within
this annular recess I fit an annulus of india-rubber or like resilient material or
composition of materials preferably shaping the inner part of the recess dovetail
or locking so that with the aid of a suitable cement a fast and lasting union
between the wood or more rigid material and the resilient addition thereto may be
secured.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 indicates a vertical section of a valve disc a and valve seat band
adjacent parts according to my invention. c being the india-rubber ring.
Figure 2 shews a modification in the form of the annulus of vulcanized or like
composition of india-rubber or similar resilient material e in cross section.
Figure 3 shews a like view of another modification of form of annulus c.
Figure 4 shows an enlarged cross sectional view of one part of the annulus c
shewn inserted in the circumference of the valve Figure 1.
Figure 5 shews another modification in form the resilient material being here
shewn as of inverted L form in section.
Figure 6 shews another modification in which the quantity of resilient material
may be much reduced, and
Figure 7 shews another method of applying the elastic annulus c so that it is
inserted from the meeting face a¹ of the valve in an inwardly inclined groove a³.
The forms c will sufficiently indicate the method to be employed in applying the
invention and also that the form or forms in cross section of the annulus or annuli
if two concentric rings are used may be considerably varied without departing
from the peculiar character of the invention.
The cement employed may be any suitable waterproof cement such as is employed
for analogous purposes in uniting wood to rubber or like compositions.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is
1. The manufacture and use of valves, or valve discs, of a combination of pear-
wood, boxwood or other suitable or like material, readily shaped to requirement,
and vulcanized india-rubber or like resilient material in the form of an annulus, or
annuli, in manner and for the purpose substantially as set forth.
2. In a valve, or valve disc, a body or plate of pear-wood, boxwood or other
suitable or like material of inexpensive and readily shapeable character in com-
bination with an annulus, or annuli, of india-rubber or other suitable resilient
material applied around the circumference or outer surface of the body, substantially
as set forth.
3. The manufacture and use of valves, or valve discs, of a combination of pear-
wood or other suitable inexpensive and accurately shapeable material and india-
rubber or resilient material of similar character applied as and for the purposes
hereinbefore set forth.
Dated the 2nd day of June 1801
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.