Improvements in Apparatus for Boring Cylinders, Reseating Valves, and like purposes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION."
Improvements in Apparatus for Boring Cylinders, Reseating Valves,
and like purposes.
I, PERCIVAL JOHN PURDY, of 7 Tyndale Terrace, Islington, Commission Agent,
do hereby declare the nature of this invention to be as follows:-
-
At the present time several forms of apparatus are in the marked adapted more
or less successfully to reseat valves in situ. These forms of apparatus generally
speaking comprise a chuck adapted to engage with the interior of the valve casing,
a central spindle carrying a suitably shaped cutting or facing tool and means
for feeding and rotating such tool. For cutting the valve disc, the
apparatus most commonly used consists of a casing adapted to
the valve disc, a fixed cutting tool carried by the casing, the spindle of the
valve being held by a chuck and the disc revolved against the cutting face.
hold
My invention relates to improvements in apparatus adapted to carry out the
reseating of valves and facing discs of the kind heretofore mentioned, and has
the additional advantages of being adapted also for facing winged valves, valves
in which the opening is partially protected by cross-bars, and generally by the
boring and facing of cylinders, of valves and the like.
For facing winged valves I propose that such valve discs should be held in a
suitable chuck or grip, and if of large size they may be further supported by a
centering pin, an adjustable cutter preferably of the class hereafter described is
provided upon a cross-frame capable of say vertical adjustment, while the cutter
is capable of longitudinal adjustment so as to bring it in contact with the face
of valves of varying sizes, means for imparting rotation to the chuck or gripping
device is also of course provided. For the purpose of boring or reseating the
stationary portion of the valve, I propose that the apparatus should consist of cross
or H frames carrying stepped or screwed engaging pieces on either side, such
engaging pieces being mounted on a reversely threaded screw upon opposite sides
of the centre so that they will be equally fed in or out from such centre to engage
with the interior of the valve casing. For large sized casings I propose that the
open cross bars should be adapted to lie across such casing and should be held
thereto by means of bolts and nuts as commonly supplied with flange valves of any
considerable size. Centrally mounted in the frame is the feed screw and opera-
ting device the spindle of which is adapted to receive cutting tools which for boring
or reseating purposes preferably consist of a comparatively small frame slotted.
upon opposite sides and carrying in such slots adjustable cutting edges which can
be fed out to correspond to varying sizes of valves or cylinders.
Where the valve to be reseated is provided with cross-bars having a central
opening to carry the spindle of the valve, as is common in many forms of safety
and other valves, difficulty would be experienced in holding the tool down to its
work and to obviate this I propose to provide a screw with oppositely arranged
conical nuts and a spanner or wrench with a curved lower end, the lower conical

page_text: nut being placed in the spanner is passed between the cross-bars of the valve and
brought beneath the central opening through which the screw is then passed into
the so held nut and the top conical nut being then screwed down so as to hold the
whole. Upon the screw is then placed the cutting device consisting of down-
wardly projecting arms carrying the adjustable cutters, the inner thread being
adapted to engage with the screw for the purpose of feeding while the cutters them-
selves are capable of revolving upon the screw casing.
For facing slide or gate valves it is necessary to modify the apparatus so that it
may enter the casing and cut practically in the same plane as the feed shaft.
To secure this I propose that the cutting plates provided with adjustable cutters
should carry plates or projections which will fit in the inner casing of the slide
valve so as to centre and hold the parts in proper position. On the spindle side
of the plate is a knob or projection in contact with a conical nut or wedge carried
by the feed spindle so that as such, nut or wedge is pressed in the cutting plates
are forced out against their work. Motion is imparted to the cutting plates by
means of bevel or like gear movably carried on the feed spindle.
Dated this 13th day of January, 1897.
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent.
For the Applicant.
Improvements in Apparatus for Boring Cylinders, Reseating Valves,
and like purposes.
I, PERCIVAL JOIN PURDY, formerly of 7 Tyndale Terrace, Islington, Commis-
sion Agent, but now of 28 Drayton Park, Holloway, 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:-
-
At the present time several forms of apparatus are in the market adapted more
or less successfully to reseat valves in situ. These forms of apparatus generally
speaking comprise a chuck adapted to engage with the interior of the valve casing,
a central spindle carrying a suitably shaped cutting or facing tool and means for feed-
ing and rotating such tool. For cutting the valve disc the apparatus most com-
monly used consists of a casing adapted to hold the valve disc, a fixed cutting tool
carried by the casing, the spindle of the valve being held by a chuck and the diso
revolved against the cutting face.
My invention relates to improvements in apparatus adapted to carry out the
reseating of valves and facing discs of the kind heretofore mentioned and has the
additional advantages of being adapted also for facing winged valves, valves in
which the opening is partially protected by cross-bars, and generally for the boring
and facing of cylinders, of valves and the like.
In the accompanying drawings:-
--
Fig. is a sectional elevation of an apparatus adapted for boring or reseating
a port or stationary part of the valve or a cylinder.
Fig. 2 a side view of same.
Fig. 3 a plan of the cutter portion only.
Fig. 4 a sectional elevation of another form of apparatus for the same purpose.
Fig. 5 a plan on line xa, Fig. 4.
Fig. 6 a side elevation.
Fig. 7 a plan of the cutter.
Fig. 8 a side elevation of another form of cutter,
.
i

page_text: · Fig. 10 a sectional elevation of the apparatus for facing winged and stemmed
valves and discs.
Fig. 11 a front or face view of same.
Fig. 12 a back or rear view.
Fig. 13 a sectional elevation of the apparatus. adapted for boring or reseating
an opening, port or the like, having cross bars which are shown together with a
portion of the port or the like.
Fig. 14 a plan of same.
Fig. 15 is a view of a spanner employed with this apparatus.
Fig. 16 is a sectional elevation of an apparatus for facing or reseating the open-
ings of slide or gate valves or similar openings, and
Fig. 16 is a plan of one of the parts shewn in Fig. 16.
Fig. 17 is a plan of a part of same.
To facilitate an easy comprehension of my invention I will explain it first with
reference to its use for the purpose of boring or reseating a port or stationary part
of a valve or cylinder as it is shown in Figs. 1, 2 and 3.1
In this form it consists of a cross frame 1, having dovetail or like grooves in
which slide stepped jaws 2, having screwed or other suitably shaped faces 3, the
jaws being traversed in the frame by the oppositely threaded screws 4, so that they
will be equally moved in or out from the centre to engage with the interior of the
valve casing, port, cylinder, or the like, against which the faces 3 are adapted to
press.
•
The screws have bevel gears 5 which engage with a gear 6 capable of rotation
on a sleeve 7 forming a part of the frame 1 the gear being retained in position by
a collar 8 or in any suitable way. The sleeve is threaded at 9 and carries an open
sided nut 10 through which, and the sleeve, passes a spindle 15, which carries the
cutting tool. On this spindle is a split and screwed collar 11 having a flange 12
which the upper part of the nut embraces and which collar is gripped by a split
and screwed ring 13, a screw 14 being employed for bringing two ears or lugs on
same together. The spindle has a handle 16 slotted at 17 and secured by a nut 18
so that it may be moved to and fro to alter the length of the handle according to
the position in which the apparatus is situated or being used.
The gear 6 may have a square upper part for a spanner or may have pin holes 19
for a rod or tool and the spindle carries tools of various shapes according to the
work it is required to do.
In these Figures the tool consists of a frame 20 having slots therein in the
interior opposite faces of which are grooves adapted to carry the feathers 21 of
adjustable cutting edges or tools 22 which are secured when in position by the
screws 23 passing through slots in the side of the frame.
The spindle 15 may be provided with a screwed extension piece if desired to
increase the length of same.
The apparatus when in use is adjusted in the opening of the valve or part by
rotating the gear 6 which fixes the jaws 2 in the opening so that the spindle is
centrally held while it is rotated by the handle 16 the tool cutting the face or side
of the valve seat or the like. When it requires to be fed downward to the work
the nut 10 is turned by hand or by a tool which draws down collar 11 and conse-
quently the spindle 15.
For large sized casings the frame 1 may be arranged to be across the casing or
part and to be held thereto by means of bolts and nuts as commonly used with
flange valves of any considerable size.
In Figs. 4, 5, 6 and 7 the frame is provided with three arms for the purpose of
better centering same in round openings and the jaws 2 are carried by the
screws 4 which are covered by the arms of the frame 1 and slide in grooves 24 in
the bottom of same. The tool is not adjustable but is provided with faces 22"
for facing conical openings and a face 22b for flat surfaces according to the position
in which the tool is placed on the spindle.

page_text: In Figs. 8 and 9 the tool consists of a frame 20 having slots 25 on opposite sides
with which engage. the feathers.21 of the adjustable cutting edges or tools 22
which are set in position by the screws 23. The tools 22 have cutting edges 22
and a cutting face 22b as in Figs. 4 and 7.
For facing winged valves and valves having spindles or extensions the valve
disc such as 26 Figs. 10, 11, 12 is held in a suitable chuck or grip such as 27 and
if of large size it may be further supported by a centering pin as 28. The cutter
is adjustable, the form I prefer being that shown in which the cutting edge, 29.is
held in a groove in a bar 30 by means of set screws 31 the bar being held in a
frame 32 in dovetailed grooves by means of a set screw 33 so that it is capable of
vertical or angular adjustment to suit the size of valve being refaced and the
frame 32 itself may be suitably held while the work is in progress.
To support the valve during cutting bars 30" 30% adjustable in the same way as
the bar 30 may be employed.
The frame 32 is an open shell having a cross frame or head the opening at the
rear end of same being screwed to enable it to hold the jaws 2 of my apparatus,
the spindle 15 of which carries the chuck 27.
To provide for different classes of work the open frame 32 may be adjustable
longitudinally in different ways such as by forming the connecting parts between
the head and rear portion by rods instead of webs 32ª upon which rods the front
or rear part is adjustable by set screws or in place thereof a similar open frame
may be screwed into the rear part of same to increase its length the jaws 2 then
being fitted into the rear of the second frame instead of the first.
Where the valve opening to be reseated is provided with cross bars such as 84
in Fig. 13 having a central opening to carry the spindle of the valve as is common
in many forms of safety and other valves difficulty would be experienced in hold-
ing the tool down to its work and to obviate this a screwed spindle 15ª is employed
having oppositely arranged conical nuts 35, 36 which fit in said opening from
either end the lower one being held in place (while the spindle is screwed into it)
by means of the lower end of the spanner shown in Fig. 15.
The spindle carries a screwed sleeve 37 having a flange 38 which supports the
boss 39 of the downwardly projecting arms 30 Figs. 13 and 14 which carry
cutters 22° adapted to face the flat surface of the opening, or angular cutters 22
adapted to reseat the conical seat of same these being shown in the drawing as
alternative arrangements.
The cutters may be adjustable in the arms if desired.
The boss is capable of freely revolving on the sleeve 37 and it carries a squared
or angular head or nut 40 for the upper end of the spanner shown in Fig. 15 by
which the cutters may be revolved to grind the face or part.
A collar 41 is pinned or screwed to the upper end of the sleeve 37 and has open-
ings 42 adapted to receive a rod or tool or it may be arranged to receive a spanner
so that when turned the screwed sleeve 37 is fed down the screwed spindle 15".
For facing slide or gate valves the apparatus is modified as shown in Figs. 16 16"
and 17. In this case I employ cutting plates 43 provided with cutters 22 which
may be adjustable if desired. Such plates have projections 44 which will fit in
the opening or port so as to centre or hold the parts in proper position. On the
spindle 15 which is screwed at its end'is a conical nut or wedge 45 adapted to bear
on knobs or projections 46 while the inner faces of the plates 43 have bevel
teeth 47 which engage with a bevel gear 48 adapted to slide on the spindle 15 but
forced to revolve therewith by means of a feather 49 engaging with a groove of
the spindle. The apparatus described in Figs. 1 or 4 is secured and. centred on the
upper opening of the valve or part and the spindle is revolved by the handle so
as to cause the gear 48 to rotate the plates 43 and thus cause the cutting edges 22°
to grind or cut the seat or faces, the feeding being accomplished by means of the
wedge 45 which as it is caused to descend by the feeding device forces the plates
outwardly and keeps the cutters up to their work. The plates 43 may carry one
cutting edge 22° two, or a number as desired.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I claim
is:-
1. The combination and arrangement of parts forming the improved apparatus
for boring or reseating ports or the like or the stationary part of a valve or
cylinder substantially as described and illustrated in Figs. 1 and 2.
2. The combination and arrangement of parts forming the improved apparatus
for boring or reseating ports or the like or the stationary part of a valve or cylinder
substantially as described and illustrated in Figs. 4, 5 and 6.
3. The constructions of adjustable cutters substantially as described and for
the purposes set forth.
4. The construction of the cutter having a cutting face and a cutting edge sub-
stantially as described and illustrated in Fig. 7.
5. The arrangement of open frame having a cutter provided with an adjust-
ment whereby it is enabled to take in and face winged valves and the like sub-
stantially as described.
6. For facing valves having a central opening to carry the spindle the combina-
tion with a screwed spindle of adjustable cones or nuts, arms carrying cutters, a
sleeve on which such arms may revolve and means for feeding down the sleevo
substantially as described.
7. For facing slide or gate valves a cutter plate having a cutting tool or tools
carried on the edge of its face substantially as and forth the purpose set forth.
8. For facing slide or gate valves a plate or plates having a cutting tool or tools,
means for rotating the plates from a central spindle and a cone or nut carried by
the spindle for forcing the plate or plates outwardly to keep the cutters up to
their work substantially as described.
9. The combination and arrangement of parts substantially as described and
illustrated in Figs. 10, 11 and 12.
10. The combination and arrangement of parts substantially as described and
illustrated in Figs. 13, and 14.
11. The combination and arrangement of parts substantially as described and
illustrated in Figs. 16 to 17.
Doted the 8th dort of October 1907
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicant.