Improved Mode of and Apparatus for Packing Stuffing Boxes and the like under Pressure.
Year: 1888

page_text: Date of Application, 22nd -Dec., 1888
Complete Specification Left, 15th Aug, 1889-Accepted, 21st Sept., 1889
PROVISIONAL SPECIFICATION.
Improved Mode of and Apparatus for Packing Stuffing Boxes and
the like under Pressure.
I JOHN ALLEN FOWLER of 130 Great Suffolk Street, Southwark in the county
of Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide means of making joints tight where a
moveable spindle passes from a vessel containing pressure or vacuum.
To this end I provide upon such vessel an external spigot or boss preferably
cylindrical through which the moveable spindle passes; in some cases I apply to the
spindle inside the vessel a coned collar adapted to bear against a coned bush at the
base of the spigot, and thus take the pressure and prevent leakage. I provide a cap
adapted to fit concentrically upon the outside of the said spigot having one end closed
with an aperture therein for the spindle.
The packing is placed in the cap which is then placed upon the spindle and screwed
or otherwise forced down compressing the packing as required. To facilitate and
prevent leakage during the operation I employ an idle tool adapted to pass through
the cap and fit on the top end of the moveable spindle and act as a guide for the cap;
when the joint is made the tool'is removed.
Dated this 22nd day of December 1888.
J. C. CHAPMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improved Mode of and Apparatus for Packing Stuffing Boxes and
the like under Pressure.
I JOHN ALLEN FOWLER of 130 Great Suffolk Street, Southwark in the County
of Surrey, Engineer, do hereby declare the nature of this invention and 'in 'what
manner the same is to be performed to he particularly described and ascertained
in and by the following statement :-
The object of this invention is to provide means of making joints tight where 'a
moveable or other spindle pipe or rod passes from a vessel containing. pressure, or
vacuum.
To this end I provide upon such vessel an external spigot or boss preferably
cylindrical through which the said spindle or other part passes; in some cases I
apply to the spindle inside the vessel a coned collar adapted to bear against a coned
bush at the base of the spigot and thus take the pressure and prevent leakage. I
provide a cap adapted to fit concentrically upon the outside of the said spigot having
one end closed but with an aperture therein for the spindle.
The packing is by preference placed in the cap which is then placed upon the
spindle and screwed or otherwise forced down compressing. the packing-as required.
To facilitate the operation I employ an idle tool adapted to pass through the cap-and
fit on the top end of the spindle or rod and act as a guide for 'the cap; "when the joint
is made the tool is removed.
In order that my invention may be fully understood I will describe the same in
reference to the accompanying drawings in which Figures 1 to 4 illustrate the arrange-
ment as applied to a sluice valve spindle and Figure 5 as applied to a-steam valve and
Figure 6 to a sliding rod, or it may be a fixed rod or pipe. In all these figures
similar letters of reference are used to indicate similar parts.

page_text: Referring to Figures and 2 which are respectively longitudinal and cross
sections V is the vessel containing pressure in this case the valve casing to which is
bolted the cover A having the cylindrical boss a cast on it through which passes the
rotary spindle C operating the valve v in the usual manner. D is a coned collar
applied to spindle C inside the vessel V which bears against the coned bush D¹ in
cover A. E is the loose cup or stuffing box having aperture e¹ in its closed end.
F. F. are eye bolts for adjusting and fixing the stuffing box E; they may be
pivotted at ff. as illustrated Figure 2, or they may be fixed as illustrated Figure 6
adapted to pass into slotted lugs on cap E; or they may he dispensed with altogether
and the boss and stuffing box, or a covering nut to same, threaded and screwed as in
Figure 5 or they may be arranged in any suitable manner.
Figures 3 and 4 represent the idle tool or false spindle which it is advantageous
to employ during the operation of packing, and this is best effected as follows:-
The loose cap E is released from its holding bolts F taken off spindle C and old
packing removed. The idle tool T is then inserted through the aperture e¹ and
the new packing inserted, the cap being advantageously inverted for the purpose as
in Figure 4.
The cap with tool T still inside is then re-inverted, placed over the top of
spindle C and screwed down, thus forcing down and compressing the packing e tightly
against the spindle C, the cap E, and top of boss a; the idle tool T acting as a guide
until released is then withdrawn for future use.
By this mode of operation any leakage past the spindle Ciends during action to
compress the packing instead of displacing it as is the case with an ordinary stuffing
box; when there is none or only small leakage past the spindle the packing may he
placed around it and the cap applied in the usual way, in which case the idle tool is
not required.
In the application of this invention to a steam valve Figure 5, for the coned
collar and bush is substituted a flat collar D to take the thrust of the spindle.
The cover
A is screwed to the valve case V, and the cap E to contain the
packing is enclosed within a covering nut G adapted to be screwed on the top of
the boss a.
Figure 6 shows an arrangement applicable where a pipe or rod moveable or fixed
passes through the side of a vessel or chamber containing pressure or otherwise. The
boss is bolted to the vessel V and the cap E is arranged as illustrated, the operation of
packing under pressure being the same as described above.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The improved mode of packing stuffing boxes and the like under pressure
consisting in the use of a loose cap or stuffing box adapted to be removed and packed,
re-applied and secured substantially as set forth.
2. The improved construction and arrangement of parts forming stuffing boxes
adapted for packing under pressure substantially as described and illustrated.
3. In stuffing boxes and the like for packing under pressure the combination with.
the spindle or rod and the cover of the pressure vessel of external boss and loose.
stuffing box such as E passing over same and adapted to be applied to the said spindle
or rod with or without the aid of an idle tool such as T and adjusted and secured
substantially in the manner described and illustrated.
Dated this 15th day of August 1889.
J. C. CHAPMAN, Fel. Inst. Patent Agents,
70, Chancery Lane, London, W.C., Agent for Applicant.