Improvements in and relating to Machines or Appliances for Re-seating or Facing Valves.
Year: 1897

page_text: Date of Application, 12th May, 1897
Complete Specification Left, 12th Feb., 1898-Accepted, 26th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in and relating to Machines or Appliances for
Re-seating or Facing Valves.
We, WILLIAM RODGER, of 9, Coalgate, Dysart, Fifeshire, and JOHN RODGER,
of 27, Strawberry Street, Drypool, Hull, Yorkshire, Engineers, do hereby declare
the nature of our invention to be as follows:-
This invention has reference to a new or improved machine or appliance which
has for its object to avoid the necessity in repairing leaky valves of removing them
from their situations, and which will re-face or cutter up the bearing surfaces as
true as can be done in any lathe.
The improved machine or appliance would consist of a central spindle having an
increased diameter at the end which is placed inside the valve where the cutters or
tool holders pass through, and this end is formed with an external and internal
screwed part to secure the different tools required in the variety of work which the
appliance may have to adapt itself to. An adjustable plate is mounted near the
outer part of spindle and is formed with an outer projecting boss which is formed
an external screw threaded surface, and this plate is secured by bolts passing
through adjustable slotted holes to the flanges of two brackets which are bolted
through their inner flanges to the outer flange of valve casing, the brackets and
the inner surface of adjustable plate being machined to a true level surface.
A box internal screw threaded nut is mounted over the screw threaded surface of
boss of adjustable plate, and the spindle is operated by a hand wheel or a ratchet
or lever at outer end when cutting or turning the valve seat. The spindle is
formed with a series of grooves at the part round which box nut passes, and a hand
screw fits radially through box nut and enters one of these grooves to lift or
depress the spindle as the nut is revolved on screwed part of adjustable plate.
this means the spindle can be lowered into valve chamber to about the required
depth and the radial screw pin placed in the nearest groove, while the outer end
of the screw can be afterwards utilized to assist in turning or revolving the nut in
feeding the cutters up to the valve face.
By
The tools and tool holders at inner end of spindle may be modified in construc-
tion. One arrangement would be to have a round cutter or tool inserted into
socket holder and projecting sufficiently to form correct bevel. These would be
held in position by a small set screw inserted from above and coming in contact
with a slightly flattened part of this tool, and the opposite diameter of this tool
would be similarly flattened, so that on releasing the screw and turning round the
tool either a bevelled or a flat faced valve can be operated on.
These segments or holders would be put into a lathe and turned, after being
fitted on spindle in the position which they will be when fully extended, so as to
ensure perfect steadiment when compressed to their smallest diameter. These are
all firmly held in position by a set screw working up below centre part of spindle.
For the smaller sizes of valves a slightly different arrangement is provided, so
as to give a steady and easily adjusted bearing for the lower end of spindle. This
would consist of two separate plates formed to telescope into each other. These

page_text: after being set to the required size would be secured by a nut and washer on
external screwed part of spindle.
A
To adapt this appliance to operate on valve seats formed with bridge and small
hole in centre the screw at lower part of spindle is removed and a pin or stud sub-
stituted and the circular tool holder is removed and a flat holder or bar substituted
with cutters attached which can operate on a variety of different sized valves,
these cutters being so formed that they can clean up either flat faced valves or on
being reversed by removing a side set screw, act on bevel faced valves.
difficulty also presents itself that no two valves are of exactly the same size of bore
or guide hole, and to meet this a small cone or plug tapered slightly on outside is
fitted over stud and held in position by a small helical spring inserted between
shoulder of stud and top of cone, and this ensures that the cone will be held down
into guide hole and allow spindle to be fed down to clean up face, but if desired a
number of pins or studs of different diameters may be substituted for the tapered
cone, and these pins can be made stepped or in two or more sectional sizes.
In some situations only one bracket and single or semi-length adjustable plate
would be used, and in such case a sliding shoe would be fitted below plate to allow
for adjustment of the latter in setting to centre of valve casing. By using the shoe
one bolt would be sufficient to get a secure fixture, but the bracket for fixing
on valve casing may be formed. longer to reach two studs if desired, and instead of
a straight bracket to move on studs may be substituted.
In the case of very small diameter of valves double faced solid cutters may be
used, these, being fixed to bottom part of spindle and a thick washer or disc fitted
for steadiment. A set screw would be fitted in adjustable plate to hold up the
spindle when adjusting or changing the cutters.
Dated the 11th day of Mov 1807
.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Machines or Appliances for
Re-seating or Facing Valves.
We, WILLIAM RODGER, of 9, Coalgate, Dysart, Fifeshire, and JOHN RODGER,
of 27, Strawberry Street, Drypool, Hull, Yorkshire, Engineers, do hereby declare
the nature of our invention and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement, that
is to say:-
This invention has reference to a new or improved machine or appliance which
has for its object to avoid the necessity in repairing leaky valves of removing them
from their situations, and which will reface or cutter up the bearing surfaces as
true as can be done in any lathe.
And in order that our said invention and the manner of carrying same into
practice may be properly understood, we have hereunto appended a sheet of
explanatory drawings in which the same reference letters are used to indicate
corresponding parts in the several figures where shown. Figure 1 is a sectional
elevation showing our machine as applied in refacing a valve seat. Figure 2 is a
plan view as taken on the line 1-1 Figure 1, and Figure 3 is a sectional plan view
as taken on the line 2-2 Figure 1. Figures 4 and 5 show detached views of a
modified form of holder guide and cutting tool. Figure 6 shows an inverted plan
and side view of adjustable guide. Figures 7 and 8 are views showing modified
form of spindle with guiding pin or stud and tool and tool holder and Figure 9
is a view of guide pin or stud with adjustable cone or plug fitted in same.

page_text: Referring to these drawings:-
-
The improved machine or appliance would consist of a central spindle A having
an increased diameter at A' at the end which is placed inside the valve where the
cutters or tool holders pass through.
The tools and tool holders at inner end of spindle would be constructed as
follows. One arrangement would be to have a round cutter or tool a inserted into
socket holder a¹ and projecting sufficiently. to form correct bevel. These would
be held in position by a small set screw a inserted from above and coming in.
contact with a slightly flattened part of this tool, and the opposite diameter of
this tool would be similarly flattened, so that on releasing the screw and turning
round the tool either a bevelled or a flat faced valve can be operated on. The tool
holders a¹ have segments a³ at their outer ends.
These holders a with segments a would be put into a lathe and turned after
being fitted on spindle in the position which they will be when fully extended, so
as to ensure perfect steadiment when compressed to their smallest diameter: These
are all firmly held in position by a set screw a working up below centre part of
spindle. Another set screw a is fitted above the holder to ensure same being kept
in proper position. The feeding of the spindle A is effected by a feed nut B
mounted on a screwed boss B' on the bridge piece C of the adjustable brackets C¹ C
which are bolted through their inner flanges C to the outer flange of valve casing,
and the outer flanges C3 have slots for adjustment to suit different diameters of
valves. This feed nut B is kept in position by a brass socket B2 secured to a flat
on the spindle A. by a pinching screw b and a steel gland 133 secured to the nut B.
by two or more screws. Projections B on the nut B act as a turning handle to
feed the holder and cutter.
In the arrangement shown in Figure 4, 5 and 6 the end A¹ is formed with an
external screwed nart A2 and an internal screwed part A³ to secure the different
tools required in the variety of work which the appliance may have to adapt
itself to. Adjustable plates D D' are mounted near the outer part of spindle and
the spindle formed with an outer projecting boss A2 on which is formed an external
screw threaded surface, and these plates are secured by a nut and washer. The
plates D D are formed with adjustable slots D2 which work on and are guided by
the stepped part A' on the spindle A¹.
A box internal screw threaded nut B is mounted over the screw threaded surface
of boss B of bridge piece C, and the spindle A is operated by a hand wheel such
as E or by a ratchet or lever at outer end when cutting or turning the valve seat.
The spindle A as shown in Figure 4 is formed with a series of grooves at the part
round which box nut B passes, and a hand screw b¹ fits radially through box nut
and enters one of these grooves to lift or depress the spindle as the nut is revolved
on screwed part of adjustable bridge piece C. By this means the spindle A¹ can be
lowered into valve chamber to about the required depth and the radial screw pin b¹
placed on the nearest groove, while the outer end of the screw can be afterwards
utilized to assist in turning or revolving the nut in feeding the cutters up to the
valve face. The cutter a shown in this arrangement is formed in one piece and
secured by the pinching screws a* a5 a6 the hole in the part A¹ being made up
with a block piece a*.
For the smaller sizes of valves these telescopic plates D D₁ are preferable, so
as to give a steady and easily adjusted bearing for the lower end of spindle.
To adapt this appliance to operate on valve seats formed with bridge and small
hole in centre the screw at at lower part of spindle is removed and a pin or stud a
substituted and the circular tool holder is removed and a flat holder or bar F
substituted with cutter a attached which can operate on a variety of different sized
valves, these cutters being so formed that they can clean up either flat faced valves
or on being reversed by removing a side set screw a8 act on bevel faced valves. A
difficulty also presents itself that no two valves are of exactly the same size of
bore or guide hole, and to meet this a small cone or plug a tapered slightly on out-
side is fitted over stud and held in position by a small helical spring a¹0 inserted
between shoulder of stud and top of cone, and this ensures that the cone will be

page_text: held down into guide hole and allow spindle to be fed down to clean up face, but
if desired a number of pins or studs of different diameters may be substituted for
the tapered cone, and these pins can be made stepped or in two or more sectional
sizes.
In some situations only one bracket and single or semi-length adjustable plate
would be used, and in such case a sliding shoe would be fitted below plate to allow
for adjustment of the latter in setting to centre of valve casing. By using the
shoe one bolt would be sufficient to get a secure fixture, but the bracket for fixing
on valve casing may be formed longer to reach two studs if desired, and instead of
a straight bracket to move on, studs may be substituted.
In the case of very small diameter of valves double faced solid cutters may be
used as shown in Figures 4 and 5.
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:-
First. A machine or appliance for reseating or facing valves constructed and
arranged substantially as herein described in reference to and shown in the
accompanying drawings.
、
Second. In a machine or appliance for reseating or facing valves, the construc-
tion and arrangement of telescopic cutter bar or socket holder substantially as
herein described in reference to and shown in the accompanying drawings.
Third. In a machine or appliance for reseating or facing valves, the arrange-
ments for feeding the cutters to the work substantially as herein described in
reference to and shown in the accompanying drawings.
Fourth. In a machine or appliance for reseating or facing valves, the arrange-
ment of telescopic plates for steadiment when facing smaller work, substantially
as herein described in reference to and shown in the accompanying drawings.
Fifth. In a machine or appliance for reseating or facing valves the arrangement
of cone or plug with helical spring, substantially as and for the purposes herein
described in reference to and shown in the accompanying drawings.
Dated the 11th day of February 1900
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.