Improvements in Pistons for Steam and other Engines, also Applicable to Pump Buckets.
Year: 1887

page_text: Date of Application, 4th Feb., 1887
Complete Left, 4th Nov., 1887
Complete Accepted, 6th Dec., 1887
Improvements in Pistons for Steam and other Engines, also
Applicable to Pump Buckets.
We JOHN LEPPER of Laurel Lodge and JOHN POLLOOK of 66 Limestone Road both
in Belfast in the County of Antrim in Ireland Engineers do hereby declare the
nature of this invention to be as follows:-
The object of our invention is to enable piston or pump packing rings and the
like to be removed and replaced without expanding the packing rings or removing
the piston head or pump bucket from the cylinder.
For this purpose we construct a loose ring or loose rings having a rib or ribs
formed on the face of such ring or rings which we place in the space between the
flange of the piston head and the junk ring or the corresponding space in the
pump bucket.
The rib or ribs upon the loose ring or loose rings form recesses for containing
the packing rings which are arranged and placed in position in the spaces above
mentioned along with the loose ring or loose rings.
HYNDMAN & DICKSON,
6, Waring Street, Belfast,
Agents for Applicants.

page_text: Improvements in Pistons for Steam and other Engines, also
Applicable to Pump Buckets.
We, JOHN LEPPER of Laurel Lodge and JOHN POLLOCK of 66 Limestone Road
both in the Borough of Belfast and County of Antrim in Ireland, 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
Our invention has reference to the packing rings of pistons for steam and other
Engines and also of buckets for pumps and the like and its object is to enable such
packing rings to be removed and replaced in the piston or bucket with safety and
ease and without the necessity of expanding the packing rings or removing the piston
head or pump bucket from the cylinders in which they work whereby the risk of
breaking or straining such packing rings in the process of springing them over the
solid piston head or pump bucket is avoided.
For this purpose we construct one or more solid loose ring or rings bored out to fit
the body of the piston head or pump bucket such ring or rings having a projecting
piece or rib or ribs formed or turned on the face thereof to fit the bore of the cylinder
and we place such ring or rings in the space or recess between the bottom flange of
the piston head and the junk ring or the corresponding space or recess in the pump
bucket.
The projections or ribs upon the solid loose ring or rings form recesses for containing.
the packing rings which we arrange and place in position in the spaces or recesses
above mentioned along with the solid loose ring or rings one or more of the solid loose
ring or rings being required according as two or more of the packing rings are to be
employed, thus when putting the piston together we place one packing ring upon
the bottom flange of the piston head and upon the top of and enclosing that packing
ring we place one of the solid loose rings formed as above described with a second
packing ring on the top of the projection or rib of such solid loose ring and the junk
ring above them. When more than two packing rings are to be employed we place
a second solid loose ring upon the top of the solid loose ring previously mentioned
with another packing ring upon its projection or rib and the junk ring is bolted down
upon the top of the third or other topmost of the packing rings so employed. It will
thus be understood that the solid loose ring with its projection or rib is used for
keeping the packing rings apart and in position and that, on the removal of the junk
ring, the packing rings and solid loose rings may be lifted out or removed and
replaced and that, in cases in which cylinders have worn and the pistons or pump
buckets have become slack and no longer steam or water tight, by renewing or
replacing the solid loose ring or rings a practically new piston is provided at a
trifling cost and without loss of time.

page_text: By the arrangement we have described the packing rings, after having the pieces
cut out in order to give them the requisite spring, may be jambed between the
piston flange and junk ring and turned perfectly true with the diameter of the
cylinder.
And in order that our said invention may be more fully understood we shall now
proceed to refer to the drawings upon the sheet hereunto annexed the same letters of
reference indicating the same or corresponding parts of our arrangement throughout
all the figures.
Fig. I is the vertical section of a piston head cut across diagonally showing one of
the solid loose rings above described in position between the bottom flange of the
piston head and the junk ring and spaces or recesses to receive and contain two
packing rings.
Fig. II is half of a solid loose ring cut across diagonally and
Fig. III is half of two solid loose rings to be used where more than two packing
rings are employed cut across diagonally.
a, is a piston head cut across diagonally; b, is the bottom flange thereof; c, is the
junk ring and d, is a solid loose ring furnished with a projection or rib, e.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is
1. The use in steam and other pistons of solid loose rings having projections or ribs
constructed and employed substantially in the manner and for the purposes herein-
before described and shewn in the drawings hereunto annexed.
2. The use in pump buckets of solid loose rings having projections or ribs con-
structed and employed substantially in the manner and for the purposes hereinbefore
described and illustrated by the drawings hereunto annexed and
3. The combination and arrangement of parts constituting our compound apparatus
above mentioned constructed and applied substantially in the manner and for the
purposes herein before described and illustrated by the drawings hereunto annexed.
November 1887
Daica
CHIN CY
HYNDMAN & DICKSON,
6, Waring Street, Belfast,
Agents for Applicant.
1273 7 Sma no
LOOK
VOICHIOCI
HYNDMAN & DICKSON,
6, Waring Street, Belfast,
Agents for Applicant.