Year: 1886

page_text: I, WILLIAM FILSHIE of Boness Road Grangemouth in the County of Stirling,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object to keep pistons tight whilst moving in steam,
gas, air, water or other cylinders and it consists in fitting an L or other shaped
ring to the "junc" ring of the piston, that is to say, to the ring by which the
packing ring is held in position. The shaped ring is pressed against the packing
ring by a wave spring or springs situated in an annular space formed between the
june ring and the shaped ring and the piston is kept against the cylinder face by
the usual coach-wave, spiral or other springs now in use. To prevent leakage of
steam at the shaped ring two rings with inclined or cone shaped surfaces may be
used in the annular space or recess in addition to the waved spring these rings
being placed in the recess above the spring and with their inclined or cone shaped
surfaces in contact. Thus when pressure is exerted by the wave spring on the said
rings a tendency to press in opposite directions is communicated, thereby forcing
the shaped ring tightly against the cylinder face. ..
Under a modification the L shaped ring may be dispensed with and a wedge
shaped ring substituted therefor. This ring is inserted between the upper side of
the packing ring and the lower surface of the "june" ring the point of the wedge
being towards the surface of the cylinder. The recess for the wave spring is
made behind the wedge shaped ring and to keep the wave spring in position &
holding up ring is bolted, screwed, or otherwise attached to the underside of the
"junc" ring.

page_text: I, WILLIAM FILSHIE of Boness Road, Grangemouth, in the County of Stirling,
Engineer 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 for its object to keep pistons tight whilst moving in steam,
gas, air, water or other cylinders.
On the accompanying drawings figure 1 is a vertical section of part of a piston
with the packing arranged in accordance with my invention, the section being
taken on the line a, b, figure 3. Figure 2, is a vertical section on the line c, d,
figure 3, the left hand half of figure 3 being a horizontal section of the piston on
the line e, f, figure 1, and the right hand half a like section on the line g, h,
figuré 2. As seen by these figures the invention consists in fiting an L or other
equivalent shaped ring i, to the "june" ring j, of the piston, that is to say, to the
ring by which the packing ring, is held in position. The shaped ring i, is
pressed against the packing ring k, by a wave spring or springs l, situated in an
annular space formed between the "junc" ring and the shaped ring, and the piston
is kept against the cylinder face by the usual spiral springs m, or by coach, wave
or other ordinary springs now in use. To prevent leakage of steam at the shaped
ring, two rings with inclined or cone shaped surfaces may as seen at n, o, figure 4,
be used in the annular space or recess in addition to the waved spring 1, these
rings n, o, being placed in the recess above the spring l, and with their inclined
surfaces in contact. Thus when pressure is exerted by the wave spring on the
said rings, a tendency to press in opposite directions is communicated, thereby
forcing the shaped ring i, tightly against the cylinder face.
Under a modification illustrated in vertical section at figure 5, the L shaped
ring i, may be dispensed with and a wedge shaped ring r, substituted therefor.
This ring is inserted between the upper side of the packing ring k, and the lower
surface of the "juno" ring j, the point of the wedge being towards the cylinder.
The recess for the wave spring 1, is made behind the wedge shaped ring, and to
keep the wave spring in position a holding up ring sis bolted, screwed or otherwise
attached to the under side of the "juno" ring.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In metallic packing for pistons an L or equivalent shaped ring fitted to the
"junc" ring and pressed against the packing ring by a wave spring or springs,
substantially as hereinbefore described with reference to figures 1, 2 and 3, of the
appended drawings.
2. In metallic packing for pistons an L or equivalent shaped ring fitted to th
"june" ring and pressed against the packing ring by a wave spring or springs and

page_text: also against the interior surface of the cylinder by the said spring or springs acting
upon two rings with inclined surfaces, substantially as described with reference to
figure 4, of the accompanying drawings.
3. In metallic packing for pistons a wedge shaped ring fitted to the junc ring
and pressed against the said ring and the packing ring by a wave spring or springs
substantially as described with reference to figure 5 of the appended drawings.
Dated this Thirtieth day of September 1886