IMPROVEMENTS IN VALVES AND VALVE GUIDES FOR THE AIR AND CIRCULATING PUMPS OF MARINE ENGINES, WHICH IMPROVEMENTS ARE APPLICABLE ALSO TO VALVES FOR OTHER PURPOSES."
Year: 1880

page_text: LETTERS PATENT to William Bury, of New London Street, Mark Lane, in the
City of London, Engineer, for an Invention of "IMPROVEMENTS IN VALVES
AND VALVE GUIDES FOR THE AIR AND CIRCULATING PUMPS OF MARINE
ENGINES, WHICH IMPROVEMENTS ARE APPLICABLE ALSO TO VALVES FOR
OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said William Bury at the Office of
the Commissioners of Patents on the 23rd November 1880.
WILLIAM BURY, of New London Street, Mark Lane, in the City of London,
Engineer. "IMPROVEMENTS IN VALVES AND VALVE GUIDES FOR THE AIR AND
CIRCULATING PUMPS OF MARINE ENGINES, WHICH IMPROVEMENTS ARE APPLICABLE
ALSO TO VALVES FOR OTHER PURPOSES."
According to my Invention I construct valves for the air and circulating pumps
of marine engines, and also valves for various other purposes, with renewable faces of
material, such as cork, soft wood, or the like, and means for compressing and
holding such renewable faces in their places, and also I provide the guides of such
valves with lignum vitæ faces.
In one construction of valve according to my Invention (applicable especially to
valves of large size) the valve body is in the form of a ring or disc constructed
with radial ribs formed to receive between every two of them a segment of cork
or other material. The inner circumference of the ring or disc is provided with a
rim or annular wall that constitutes an abutment for the inner ends of the
segments, and I tighten up or force home all the segments by means of a fastening
ring (it may be compound a ring), that serves also for holding the whole of the
segments in their respective places. The radial ribs are or may be so shaped that
the space between two of them and their ring or disc is of a dovetail or equivalent
17

page_text: form to assist in keeping the segments or faces in place. In small valves the radial
ribs may be dispensed with. It will also be obvious that valves may be
constructed in various other ways on the principle of my Invention as hereinabove
set forth, that is to say, with metallic bodies, renewable faces of cork, wood, or the
like, and rings or equivalent means for retaining the said faces in place.
When circular guide rods are employed I cover them with ferrules of lignum
vitæ, and when the guides are of other forms I make therein recesses (preferably
of dovetail section), wherein I fit lignum vitæ faces of suitable form to guide the
valves as required. It will be evident valves according to my Invention may,
under different modifications, be used for a large variety of purposes, and that by
my Invention the faces may be renewed at moderate cost.

page_text: SPECIFICATION in pursuance of the Conditions of the Letters Patent filed
by the said William Bury in the Great Seal Patent Office on the 18th May
1881.
WILLIAM BURY, of New London Street, Mark Lane, in the City of London,
Engineer. "IMPROVEMENTS IN VALVES AND VALVE GUIDES FOR THE AIR AND
CIRCULATING PUMPS OF MARINE ENGINES, WHICH IMPROVEMENTS ARE APPLICABLE
ALSO TO VALVES FOR OTHER PURPOSES."
According to my Invention I construct valves for the air and circulating pumps
of marine engines, and also valves for various other purposes, with renewable
faces of material, such as cork, wood, or the like, and means for compressing and
holding such renewable faces in their places, and also I provide the guides of such
valves with lignum vitae faces.
In one construction of valve according to my Invention (applicable especially to
valves of large size) the valve body is in the form of a ring or disc constructed
with radial ribs formed to receive between every two of them a segment of cork
or other material. The inner circumference of the ring or disc is provided with a
rim or annular wall that constitutes an abutment for the inner ends of the
segments, and I tighten up or force home all the segments by means of a fastening
ring (it may be a compound ring), that serves also for holding the whole of the
segments in their respective places. The radial ribs are or may be so shaped that
the space between two of them and their ring or disc is of a dovetail or equivalent
form to assist in keeping the segments or faces in place.
In small valves the
radial ribs may be dispensed with. It will also be obvious that valves may be
constructed in various other ways on the principle of my Invention as hereinabove
set forth, that is to say, with metallic bodies, renewable faces of cork, wood, or the
like, and rings or equivalent means for retaining the said faces in place.
When circular guide rods are employed I cover them with ferrules of lignum
vitae, and when the guides are of other forms I make therein recesses (preferably
of dovetail section), wherein I fit lignum vitae faces of suitable form to guide the
valves as required. It will be evident valves according to my Invention may,
under different modifications, be used for a large variety of purposes, and that by
my Invention the faces may be renewed at moderate cost.
Referring to the accompanying Sheet of Drawings Fig. 1 is a vertical section and
Fig. 2 a plan of a small valve constructed according to my Invention. d is the
renewable face of the valve of cork, wood, or the like, carried by the metal frame c
and compressed by means of the adjustable ring e, which is made with a tapered
inwardly projecting annular part e' to aid in firmly holding the material d, and is
tightened around the outer edge of the material by a wedge piece for by any of
the ordinary tightening appliances; a is a brass bolt screwed into the valve seat or
facing g and surrounded by a lignum vitae ferrule b, which forms a guiding surface
to direct the motion of the frame c.
Fig. 3 illustrates in section a modification in which the inner edge of the
material & butts against a conc-headed tightening screw h, and the tightening ring e
is secured by bolts i passing through lugs in the ring e and frame c, and tightened
up by nuts it, thus firmly securing the material & in contact with c.
Fig. 4 is a vertical section and Fig. 5 a plan of a large annular valve constructed
according to this Invention and suitable for many existing pumps. d is the
renewable face of cork, wood, or the like, carried by the frame c. This frame has
a circular flange c¹ projecting both above and below its webb on its inner circum-
ference, and is divided on its underside into segments by radial ribs C (Figs. 6 and 7)
with inclined sides. Between these ribs and supported by them, as in V grooves,
are fitted the pieces of cork, wood, or the like, which form the valve face. e is an

page_text: adjustable ring constructed in segments and capable of being tightened to compress
the renewable valve face between the radial ribs and to secure it to the frame. The
valve is guided in its rise and fall by projections k, k, which form slides working
on the lignum vitae faces held by the dovetailed shaped castings m, m, and
caps n, n. The caps n, n, form stops to limit the throw of the valve.
If preferred these valves can be guided by brass bolts or studs with lignum vitae
ferrules, as described with reference to Figs. 1 and 2, such bolts and ferrules being
introduced as indicated by dotted lines at a, b, Fig. 5. Annular valves, such as
described with reference to Figs. 4 and 5, may be modified as regards the arrange-
ments for holding in place the material d, which arrangements in such valves may
be such as already described with reference to Fig. 3.
In all cases I so construct the renewable faces as to form a covering bearing on
the whole area of the face of the grating in the seating in order to obtain the utmost
bearing surface possible.
Having now described the nature of the said Invention, and the manner in which
it is to be or may be carried into practical effect, I would have it understood that
what I consider to be novel and original, and therefore claim as secured to me under
the Letters Patent hereinbefore in part recited is,―
1. The combination in a valve designed to close against a seat having a grating
of a renewable face of cork, wood, or the like, so arranged as to cover the whole
area of such grating, in the seating and a frame or body wherein such face is secured,
substantially as described.
2. Constructing with lignum vitae the bearing surfaces of the guides that control
the motion of valves rising and falling at right angles to the faces of their seatings,
substantially as described.
3. The improved valves constructed, arranged, and operating, as described and
shewn respectively in Figs. 1 and 2, in Fig. 3, and in Figs. 4 to 6 inclusive, of the
Drawings.
In witness whereof, I, the said William Bury, have hereunto set my hand
and seal, this Seventeenth day of May, in the year of our Lord One thousand
eight hundred and eighty one.