Improvements relating to Metallic Packing for Piston and Valve Rods of Steam or other Engines.
Year: 1891

page_text: Date of Application, 17th Sept., 1891
Complete Specification Left, 17th June, 1892-Accepted, 23rd July, 1892
PROVISIONAL SPECIFICATION.
Improvements relating to Metallic Packing for Piston and Valve
Rods of Steam or other Engines.
We, RICHARD WOODHOUSE and SAMUEL MITCHELL, of the firm of Woodhouse
& Mitchell, of Brighouse, in the County of York, Engineers, do hereby declare the
nature of this invention to be as follows:
:-
This invention has reference to metallic packing for piston and valve rods, our
improvements therein consisting in means to be employed for forcing the segments
of each metallic packing into close contact with the piston or valve rod, and also
against the steam-tight surfaces. We also provide means to allow for any
irregularity or untruth in the motion of the piston rod, and also we provide means
whereby a complete packing can be made to revolve upon the piston rod indepen-
dently of the casing or stuffing box, so as to compensate for any unequal wear, to
which otherwise the packings may be liable.
In carrying out our improvements as above set forth, the packings are made
circular in two or more pieces, and are put together in one or more pairs. These
circular packings are made with flanges on their outside, so that when put together,
they leave or form an annular groove, into which we insert a suitable form of spring,
which forces the metallic packing into contact with the piston rod. The spring
also forces the metallic packings apart or asunder, forcing their upper and lower
surfaces into contact with certain plates or a divided ball joint, which latter is
employed for the purpose of allowing for irregular movement, from whatever cause,
in the motion of the piston rod. When two pairs of metallic packings are employed,
so as to form a complete packing, a plate may be placed between them and also
above and underneath them, such plates being provided with a convex spherical
surface fitting a corresponding concave surface against the cylinder head and against
the casing. The complete packing, consisting of one or more pairs, may be enclosed
in a circular box in such a manner as not to be prevented from moving towards the
centre of the rod or in a direction parallel thereto, but so as to be compelled to
revolve with the motion of the circular box in which they are contained. This
circular box may receive its motion by worm and wheel or other suitable gearing,
and may be operated automatically by the engine or other means.
Dated this 16th day of September 1891.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements relating to Metallic Packing for Piston and Valve
Rods of Steam or other Engines.
We, RICHARD WOODHOUSE and SAMUEL MITCHELL, of the firm of Woodhouse
and Mitchell, of Brighouse, in the County of York, Engineers, 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 :-
This invention has reference to metallic packing for piston and valve rods, our
improvements therein consisting in means to be employed for forcing the segments
of each metallic packing into close contact with the piston or valve rod, and also
against the steam-tight surfaces. We also provide means to allow for any
irregularity or untruth in the motion of the piston rod, and also we provide means
SPQ71

page_text: whereby a complete packing can be made to revolve upon the piston rod indepen-
dently of the casing or stuffing box, so as to compensate for any unequal wear, to
which otherwise the packings may be liable.
Such being the nature and object of our improvements, we will make reference
to the annexed sheets of drawings, wherein
Fig. 1 is a vertical section of one form of our metallic packing together with the
means we employ for keeping the packing up to its work and Fig. 2 is plan of same.
A represents the piston rod and B the cylinder head on the top of which is a box
or casing C held in position by bolts D. Within the space formed above the
cylinder head and the casing, we insert two rings E, F, forming a ball joint and
fitting corresponding concave recesses made at the top of the cylinder head and
'underside of the casing C. Between, the ball jointed rings E, F, we place segments
of metallic packing G which are forced apart and into contact with the piston. rod
and against the steam-tight surfaces by means of suitable springs H which may be
formed of various sections or constructions and composed of any suitable material
possessing elasticity for the purpose of forcing the packing against the several parts.
These ball jointed rings E, F, are free to oscillate and allow for irregularity or
untruth in the motion of the piston rod and thereby prevent unequal wear of the
packing.
Fig. 3 is vertical section and Fig. 4 plan view of a modified form of our improve-
ment.
In this case the packing itself is made convex, fitting concave surfaces in the
rings E, F, so that the packing will automatically adjust itself to irregularity or
untruth in the motion of the piston rod.
Fig. 5 is a vertical section corresponding to Fig. 1 except in this case a double
or complete packing is shewn to be used.
In Fig. 6 we shew. the ball jointed flanges together with the packing to be
inserted within a box or casing I. This box has a worm wheel J cast on its outer
surface gearing with a worm K. By this arrangement, the packing is revolved
around the reciprocating piston rod, but it is not prevented from moving laterally
against the piston rod or from being adjusted to irregular motion of the rod.
In Fig. 7 we shew how two complete packings may be employed, but between
each set of packings a disc or ring L is used.
In Figs. 8 and 9 we shew, in combination with the ball jointed rings E, F, how.
the packing may be forced against the parts by a helical form of spring M.
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 :-
Firstly. In connection with packings for piston and valve rods, the combination
therewith of the ball jointed rings such as E, F, for purposes described and shewn
in the accompanying drawings.
Secondly. The construction of packing having flanges forced into contact_with
the parts by springs, when used in combination with the ball jointed rings E, F,
arranged substantially as shewn and described in the accompanying drawings.
Thirdly. In connection with piston and valve rods of steam engines, the arrange-
ment of packing and ball jointed rings, in combination with a worm and wheel
arrangement as shewn in Fig. 6 and for purposes set forth.
Dated this 16th day of June 1892.