IMPROVEMENTS IN SPRINGS FOR PISTON PACKING
Year: 1884

page_text: 1 ROBERT WAGSTAFF of 5 Henry Street Hyde in the County of Chester
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
SPRINGS FOR PISTON PACKING to be as follows:-
My Improvements consist of three or more spiral springs, each spring containing
two or more coils, the number of spiral springs, or the number of coils in each
spring, can be varied according to requirements each spiral spring is placed at equal
distances apart between the inner circumference of the wearing Ring, or Rings, and
the outer circumference in the recess of the Piston Block.
The outer side of each spiral spring is made convex to fit into the inner circum-
ference of the wearing Ring, or Rings, the opposite or inner side can either be
straight, convex, or concave, as most suitablo to the distance between the inner
circumference of the wearing Ring, or Rings, and the outer circumference in the
recess of the Piston Block.
In cases where a very short distance only is admissible, as in Air Pump Buckets,
or solid Block Pistons, I make the coils to lap singly one on to another, and convex
suitable to the inner circumference of the wearing Ring, or Rings.
These springs can be made of Steel, Brass, Bronze, or other Metal, or Material,
and of a round, square, or other convenient section..
The action of the springs is obtained as follows.
The longitudinal action of each spring is obtained by the opening of each coil
after compression, the outer coils pressing against the Flanges of the wearing Rings,
or against the faces of the Piston Block, where there are no Flanges on the wearing
Rings
The circumferencial action is obtained by the outer coil, or coils, of each spring,
being mado to project beyond the central coil, or coils, and press against the inner
circumference at the outer edge, or edges, of the wearing Ring, or Rings, at the
same time the central coil or coils project the opposite way and press against the
centre of the outer circumference, in the recoss of the Piston Block.
The springs being compressed both ways when put into position in the Piston
Block and in the cylinder.

page_text: COME DELE
I ROBERT WAGSTAFF of 5 Henry Street Flyde in the County of Chester do
hereby declare the nature of my invention for IMPROVEMENTS IN SPRINGS FOR
PISTON PACKING and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
.
My Improvements consist of three or more spiral springs, each spring containing
three or more coils, the number of spiral springs, or the number of coils in each
spring, can be varied according to requirements, each spiral spring is placed radially,
at equal distances apart, between the inner circumference of the wearing Ring, or
Rings, and the outer circumference in the recess of the Piston Block..
The outer side of each spiral spring is made convex to fit into the inner circum-
ference of tho waring Ring or Rings the opposite or inner side can be either straight,
convex, or concave as most suitable to the distance between the inner circumferenco
of the wearing Ring or Rings and the outer circumference in the recess of the
Piston Block.
In cases where a very short distance only is admissible, as in Air Pump Buckets,
or solid block Pistons, I make the coils to lap singly one on to another, and convex
suitable to the inner circumference of the wearing Ring, or Rings.
These springs can be inade of Steel, Brass, Bronze, or other Metal or material and
of a round, square, or other convenient section.
The action of the springs is obtained as follows.
The longitudinal action of each spring is obtained by the opening of each coil
after compression, the outer coils pressing against the flanges of the wearing Rings,
or against the faces of the Piston Block, where there are no flanges on the wearing
Rings.
The circumferential action is obtained by the outer coil or coils of each spring
being made to project beyond the central coil or coils, and press against the inner
circumference at the outer edge or edges of the wearing Ring or Rings, at the same
time the central coil or coils project the opposite way and press against the centre
of the outer circumference in the recess of the Piston Block.
The springs being compressed both ways when put into position in the Piston
Block and into the cylinder.
In order that my Invention may be fully understood and readily carried into
effect, I proceed to describe the accompanying sheet of Drawings; in each of the
Figures the samo Letters of reference refer to the corresponding parts.
Fig 1 is an elevation half in section of an ordinary loose cover Piston, shewing
the application of my improved spiral coil spring as compressed and placed in
position A is the Piston Block, B B the wearing Rings, C my Improved spiral
coil spring each spring, containing five coils, the outer sides of the outer coils
pressing against the inner circumference and flanges of the wearing Rings, the inner
sides of the two central coils pressing against the outer circumference in the recess
of the Piston Block. Fig 2 is a plan half in section shewing the method of placing
iny Improved spiral coil springs CCC radially between the inner circumference of
the wearing Rings and the outer circumference in the recess of the Piston Block,

page_text: the sides next to the Piston Block being shewn straight or they may be made
convex as shewn in dotted lines at C. Fig 3 is a front elevation of the same with
the wearing Rings broken away shewing a front view of my Improved spiral coil
spring C.
Fig 4 is a sectional elevation of my Improved spiral coil spring before compression,
containing five coils. Fig 5 is a sectional Plan, and Fig 6 is an elevation of the
same.
Fig 7 is a sectional elevation of two of my Improved spiral coil springs, each
containing three coils compressed and placed in position in a solid Block Piston the
outer sides of the two outer coils pressing against the inner circumference of the
wearing Rings and against the sides of the recesses in the Piston Block the inner
sides of the two central coils pressing against the outer circumference in the recesses
of the Piston Block; this spring can be reversed if required.
In the case of a spring with two spiral coils, only the central coil abuts against
the outer circumference in the recess of the Piston Block or if reversed, against the
inner circumference of the wearing_Ring.
Fig 8 is a sectional Plan of my Improved spiral coil spring shewing the inner
sides which press against the outer circumference of the recess in the Piston Block
to be concave as shewn at C
Fig 9 is a half sectional elevation of an ordinary Air Pump Bucket, shewing the
application of my Improved single coil spring as compressed and placed in position.
A is the Air Pump Bucket B B the wearing Rings, C³ is my Improved single coil
spring containing five laps in each coil, the action of which is exactly the same as
described for Fig 1. Fig 10 is a half sectional Plan of the same.
Fig 11 is a front elevation of my Improved single coil spring containing five
laps, compressed and placed in position.
Fig 12 is a sectional elevation of my Improved single coil spring C³ before
compression containing five laps. Fig 13 is a sectional Plan and Fig 14 is a front
elevation of the same.
Fig 15 is a sectional elevation of three of my Improved single coil springs,
containing three laps in each spring, the action of which is the same as described
for Fig 7.
It will be readily seen that my Improved springs can be varied, and made
suitable to any existing Piston Packings either curved or streight.
Having now particularly described the nature of iny said Invention and in what
manner the same is to be performed I declare that what I claim is
My Improved Piston Packing Springs, substantially as described.
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