Improvements in Valves.
Year: 1899

page_text: Date of Application, 21st Sept., 1899
Complete Specification Left, 21st June, 1900-Accepted, 4th Aug., 1900
Improvements in Valves.
We, WILLIAM HENRY LOCK, Manager and Secretary of The Linotype Company
Limited, of No. 188, Fleet Street, in the City of London, MARK BARR, of The
Linotype Works, Broadheath, in the County of Chester, Engineer, and BERNE
NADALL, of Park Lodge, Fairfield West, Kingston-on-Thames, in the County of
Surrey, Designer, do hereby declare the nature of this invention to be as follows:-
The present invention relates to improvements in valves. In carrying it into
effect, the well known circular barrel or chamber is retained but the rotary plug
or rising and falling disc is replaced by a diaphragm.
This diaphragm is a flat plate mounted transversely across its centre upon an
axis eccentric to that of the chamber above mentioned, so that when one end
of the diaphragm is in engagement with its side of the chamber, the other one
stands away from its respective side.
The ends of the diaphragm are arc shaped, having the same radius and nearly
the same centre as the chamber; and close the respective ports by fitting over
them.
The position of the axis of the diaphragm is ascertained as follows. The
centres of the ports (say two) are connected by radii of the chamber meeting at
the axis of this latter. The angle formed by their meeting is bisected. The
axis of the diaphragm is somewhere along the bisecting line. Consequently,
the motion of a point in a diaphragm end is eccentric with the chamber; and
the farther the axis of the diaphragm is set from the axis of the chamber, the
more obtuse will be the angle at which such end approaches or leaves the chamber
side.
Either end of the diaphragm fits up to the respective portion of the chamber
with a scrubbing action, and tends therefore to keep itself ground to a true fit.
It is also much thicker than is necessary to cover the respective port, to take up
wear; so that the operative portion of the said end, is always shifting from its
leading edge towards the following edge.
Dated this 19th day of September 1899.
CHAS, S. WOODROFFE,
Chartered Patent Agent.

page_text: Linotype Works, Broadheath, in the County of Chester, Engineer, and BERNE
NADALL, of Park Lodge, Fairfield West, Kingston-on-Thames, in the County of
Surrey, Designer, at present of The Linotype Works aforesaid,, 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 present invention relates to improvements in valves. In carrying it into
effect, the well known circular barrel or chamber is retained but the rotary plug
or rising and falling disc is replaced by a diaphragm.
Referring to the accompanying drawings which are to be taken as part of this
specification and read therewith,
Figure 1 is a cross section through the valve and valve chamber and
Figure 2 is a section on the line 2-2 of Figure 1.
The valve A consists of a flat plate or diaphragm, which is mounted trans-
versely across its centre upon an axis B eccentric to that of the chamber C, so
that when the valve A is in the position shown, it is in contact with one side
of the chamber C and closes the port whilst the opposite end a² stands away
from the side of chamber C.
The ends a', a² of the diaphragm A are are shaped, having the same radius
and nearly the same centre as the chamber C. They close the respective
ports c,, by the diaphragm A. being rocked into one of the two positions shown
by the full and dotted lines respectively in Figure 1. D is the lever for rocking
the said diaphragm A.
The position of the axis B of the diaphragm is ascertained in the following
manner. The centres of the ports c¹, &, are connected by radii of the chamber C
meeting at the axis of this latter. The angle formed by their meeting is bisected.
The axis B of the diaphragm A is somewhere along the bisecting line, within
the acute angle. Consequently, the motion of a point in the diaphragm end a¹
or a², is eccentric with the chamber C, and the farther the axis B of the
diaphragm A is set from the axis of the chamber C, the more obtuse will be
the angle at which such end approaches or leaves the chamber side.
Either end of the diaphragm A fits up to or comes into contact with the
respective side of the chamber C, contiguous with the ports c¹, c², with a rubbing
or scraping. action, such action tending to keep the adjacent surfaces true with
one another owing to the grinding effect which is produced. In some cases the
surfaces of the chamber Cat or near the ports 1, 2, may be ridged transversely
or formed with a series of serrations. The valve A is made much thicker than
is necessary to cover the respective ports c¹, to allow for wear; so that the
operative portions of the ends a¹, a² thereof, are always shifting from the leading
edges towards the following edges.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
-
A valve constructed and operating substantially in the manner and for the
purpose as herein set forth.
Dated this 21st day of June 1900.
CHAS. S. WOODROFFE,
Chartered Patent Agent.