Part to Metallic Packings for other Purposes.
Year: 1885

page_text: Part to Metallic Packings for other Purposes.
We, GEORGE TEMPLE of 67 Fowler Street and WILLIAM, ROWNTREE of
9 Havelock Square both of Sheffield in the County of York, Inventor and
Manufacturer respectively do hereby declare the nature of our said invention for
"IMPROVEMENTS IN PISTONS OR THEIR APPURTENANCES APPLICABLE IN PART TO
METALLIC PACKINGS FOR OTHER PURPOSES," to be as follows: —
This invention consists in a new form of piston rings, piston springs and
arrangement for fastening the two parts of the piston together. The packing rings
and springs altered to suit, (and in the case of stuffing box packings reversed so
that the ring is inside the spring) are applicable for rams, plungers, stuffing box
packings, and the like.
1st. The spring consists in a coiled flat spring which when straightened out is
made preferably slightly on a curve laterally, and when coiled and tempered is
rather broader and rather larger in diameter in the case of piston springs and
smaller in diameter in the case of stuffing box packings, than will go uncompressed
into its position in the piston or stuffing box, consequently when in place it is
tightly compressed both ways and exerts a pressure both diametrically and
longitudinally.
2nd. The packing rings are formed of L shape one preferably fitting inside the
other so as to form a channel in which the spring is confined, the spring therefore
has two tendencies 1st to press the two together and outward diametrically, and
2nd to press their radial flanges apart and against the top and bottom of the piston
longitudinally. The top and bottom of the piston can be of any usual form, but
we prefer them with the piston cover formed with two opposite quarters of the
sides of the hole into which the projection on the piston fits, made larger in
diameter than the said projection say by half an inch in small pistons, to four
inches in large: the projection on the piston fitting this hole is cylindrical to fit the
smaller diameter, but beyond the cover it has two projecting flanges on opposite
quarters of a size to just fit and pass through the enlarged quadrants of the piston
cover and beneath these flanges are two loose ones the same size. When the
packings and springs are in place and the loose packings are placed under the
stationary flanges the cover is pressed tight on and turned round. The loose flanges
turn with it and the two projecting portions of cover and piston interlock holding
all tight, for additional security one or more bolts, or set screws can be added to
hold the two immovably together.
E
T

page_text: Improvements in Pistons or their Appurtenances, Applicable in
Part to Metallic Packings for other Purposes.
We, GEORGE TEMPLE and WILLIAM ROWNTREE both of Soho Street Sheffield
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:—
The invention consists in a new form of piston rings, piston springs and
arrangement for fastening the two parts of the piston together. The packing
rings and springs altered to suit (and in the case of stuffing box packings reversed
so that the ring is inside the spring) are applicable for rams, plungers, stuffing box
packings, and the like.
The invention is best described by aid of the accompanying drawings in which it
is shewn applied to a piston or piston head.
.
Figure 1 is a plan of piston rings.
Figure 2 section of piston rings.
Figure 3 section of piston with rings and spring in position.
Figure 4 elevation of body of piston.
Figure 5 plan of body of piston.
Figures 6 and 7 edge and side view of uncoiled spring.
Figures 8 and 9 spring in its proper shape, plan, and elevation.
Figures 10 and 11 perspective views of loose pieces H H³.
Figure 12 plan of cap or cover of piston.
Figure 13 elevation of solid piston head for steam hammer turned to receive
packing such as Ramsbottom rings.
Figure 14, ditto to receive our improved packing.
Figure 15 ditto with cap or cover D in position.
Figures 16, 17, and 18, detail views of cap or cover D, as applied to solid piston
heads.
1st The spring A, Figures 6 to 9 is a coiled flat one, which when straightened
out is made preferably slightly on a curve laterally, as set forth on Figure 6, a
single curve or two or more of such curves may occur in the length of the spring.
When coiled and tempered it is rather broader and rather larger in diameter in the
case of piston springs and smaller in diameter in the case of stuffing box packing
springs, than will go uncompressed into its position in the piston or stuffing box,
consequently when it is in place it is tightly compressed in both directions and
exerts a pressure both diametrically and longitudinally.
2nd The packing rings B, C are formed of two shaped rings, one preferably
fitting inside the other so as to form a channel in which the spring is confined and
compressed. The spring therefore, when in position has two tendencies, 1st to
press the two rings together and outward diametrically, and 2nd to press their
radial flanges bc apart and against the top and bottom of the piston longitudinally.
The top and bottom of the piston can be of any usual form, but we prefer them as
set forth in Figures 3, 4, 5 and 12. The rings B and C fit together the one into
the other as shown in Figure 2, or they may be made of equal diameter the faces

page_text: of the two merely coming together. The spring A is compressed between the
rings when in the position shown in Figure 3. These may be held in this position
in a number of ways, but we prefer for ordinary purposes to make the cover D sO
as to fit under the projecting flange G carried by the cylindrical projection F of
the piston body. The piston cover which is shown in Figure 12 is formed with a
central hole to fit over the cylindrical projection F of the cylinder body. The two
opposite sides E of the hole are cut away to fit over the flange or flanges G, the
hole being cut away at E to correspond exactly in size to the flange or flanges G.
Two loose pieces H corresponding in size to the flanges G fill up the space E in the
cylinder cover, when secured in position. These two loose pieces are first placed
beneath the flanges G and then round into position, when the edge of the cover is
turned under the flange. When the packings B C and spring A are in place, and
the loose pieces H are placed under the stationary flanges, the cover is pressed tight
on, and turned round. The loose pieces turn with it, and the two projecting portions
of cover and piston interlock holding all tight. The ends of the pieces H remaining
under the ends of the flange G. If preferred, and to prevent the possibility of
turning instead of one or both pieces H, one or two pieces H¹ Figure 11 may be
used, inserted after the cover D is turned round into position. This may be wedged
in or held by set screw or other means. For additional security one or more bolts,
or set screws, not shown on the drawing can be added to hold the two immovably
together.
Some difficulty may arise in connection with securing our rings and springs
when applied to solid piston heads, such as steam hammers and for such purposes,
we prefer to attach them as shown in Figures 13 to 18. Instead of turning a series
of grooves as shown in Figure 13, required for the Ramsbottom or similar packing
rings, we should turn the piston head in the shape shown in Figure 14, with a
grooved to receive a junk ring D¹. This ring would be placed in position in two
halves, and the rings B and C and spring A are then put on between D' and F¹,
and the spring compressed as in the manner herein before described for ordinary
steam engine pistons.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1at The improved packing for pistons or glands which consists of two L sectioned
rings fitting one inside of or against the other, in the manner set forth with a
spring or springs acting between and against the flanges, and tending to, at the
same time, press the rings themselves against the surface to be packed, and their
flanges against the upper and lower sides of the groove, in which they are
confined.
2nd The spring for piston or other packing consisting of a flat strip of spring
steel, so coiled as to exert a pressure diametrically and longitudinally on the
packing, substantially as described.
3rd The piston body and cap with loose packing pieces fitted together, substan-
tially as described and set forth.
.