-Pump Buckets, and other like Apparatus.
Year: 1887

page_text: -Pump Buckets, and other like Apparatus.
1. WILLIAM LOCKWOOD, Engineer, of Granville Road, Park, Sheffield, in the
County of York, do hereby declare the nature of the said 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 relates to improved means of distending and separating the packing
rings of pistons, pump buckets and other analogous apparatus.
A special object of the Invention is to dispense with the separate distending springs
as hitherto applied in effecting the diametrical distension of the packing rings, and to
simplify and cheapen the manufacture of such rings.
The Invention consists, essentially, in the formation of the packing rings with
oppositely inclined end faces or parts, and in the use in combination therewith of
guided distending blocks oppositely arranged relatively to the said inclined faces or
parts of the packing rings, and of distending springs which have bearings between
suitable fixed parts and opposite blocks or between opposite blocks substantially as
hereinafter described.
The Invention also comprises the interlocking of the packing rings together for
preventing uneven diametrical distension thereof, in combination with the provision
of means either of the kind hereinbefore referred to for effecting the diametrical
distension of the packing rings, or of the kind hereinafter described, for tending to
keep the rings separate from each other.
The principle of the Invention is clearly illustrated on the accompanying drawings;
in which Fig. 1. represents a perspective view of packing rings adapted in accordance

page_text: with the present improvements. Fig. 2. represents a sectional elevation of Fig. 1.
the means of diametrically distending the rings being removed. Fig. 3 represents a
sectional elevation of Fig. 1. through the plane a-b. Figs. 4 and 5 represent detail
views, and Fig. 6 is a diagram explanatory of a modification of the Invention herein-
before and hereinafter further referred to.
7. represents the packing rings, the opposite end faces, 8, of which are, in
accordance with the present improvements, inclined relatively to each other both
horizontally and vertically relatively to the vertical plane, a, b; and 9 (vide also Fig. 5)
represents the said oppositely arranged distending block which is fitted between such
parts, 8, and is guided centrally between such parts by a vertical guide rod, 10. which
has its bearings in a fixed part, 11, preferably projecting from the inner side of one of
the packing rings, and in a glut or filling up piece, 12, which is adapted to close the
opening between the ends of the rings, the block, 9. being free to move along the
rod, 10, between the lowest point to which the top of the spring, 13, can be
compressed, and the highest point to which the glut or filling up piece, 12, will permit
the same to move. The said guiding rod is adapted with lateral extensions, webs or
fins, 14, which serve as guides for a flattened spring, 13, which is located around the
said rod, and between the said fixed part, 11, and the adjacent side of the block, 9,
its constant tendency being to cause the diametrical expansion of the packing ring
upon which it acts by forcing the block up between the said oppositely inclined
ends, 8, of the ring against and in excess of the constant tendency of the steam or
other pressure in the piston cylinder tending to force the rings inwards.
The distending block, 9, may be variously formed, it only being essential that it
shall be formed to correspond and work in connection with the opposite ends, 8, of
the rings, 7. When diametrical distension of the rings has occurred to any appreciable
extent I insert packing or filling up pieces of steel between the opposing inclined
faces, 8, of the ends of the rings and of the distending block.
A similar arrangement is applied to each packing ring.
The same principle of operation may be utilized in causing the vertical separation
of the packing rings in the manner represented in the diagram view Fig. 6. in
which the opposing faces 8, are made in the opposite rings, 7, and between which
faces the oppositely disposed distending blocks, 9, are placed, being constantly
separated by a spring, 13, common to both of such blocks.
The opposite edges of the packing rings, are also, in accordance with the present
improvements, fitted the one into the other for the greater part of their distance
around, in the manner represented in Fig. 2. or in any equivalent manner. In packing
rings of a small size, I prefer to form the under side of the tongue, 15, of the one ring
which fits into a corresponding recess, 16, in the adjacent edge of the other ring,. of
an undulating formation, as dotted in Fig. 2. and to fit in the rocess, 16. in parts
thereof corresponding with the hollowed parts in the tongue, 15, corresponding filling
up pieces of iron or suitable metal, as dotted at, 17. and to adapt between the
parts thus fitted a thin flat steel segmental spring, 18, of a diameter corresponding
with that of the said recess and tongue, so that when the packing rings are compressed
together in screwing up the piston block, the spring, 18, shall be caused to assume the
corrugated formation of the said parts, and in its tendency to resume its normal
formation shall constantly tend to keep the packing rings apart.
"In packing rings of large size, I prefer to make the underside of the tongue, 15, of
a plane formation, and to secure within the recess, 16, at equidistant places bowed
springs of steel or other suitable metal, as dotted at, 19, but it will be understood that
such means of keeping the packing rings apart are alternative with those hereinbefore
described relatively to Fig. 6.
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. The hereinbefore described improved means of distending the packing rings of
pistons, pump buckets and other analagous apparatus,

page_text: 2. The herein before described means of interlocking the packing rings of pistons,
pump buckets and other analagous apparatus, in combination with the hereinbefore
described improved alternative means of separating such rings.
3. The application and use of the herein before described improved means of
distending the packing rings of pistons, pump buckets, and other analagous apparatus,
in combination with the hereinbefore described improved means of interlocking such
rings, and with the hereinbefore described improved alternative means of separating
such rings.
Dal thin 04th day at Dreambre 1007
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.