Year: 1888

page_text: Date of Application, 3rd Aug., 1888
Complete Specification Left, 3rd May, 1889
Complete Specification Accepted, 8th June, 1889
I ARTHUR THOMAS ALLEN of Number 23 Christchurch Road Sheffield in the
County of York Engineer do hereby declare the nature of this invention to be as
follows:-
Four or more pipes or tubes of metallic substance bent to a radius and joined, so as
to complete a circle, by four or more smaller pipes or tubes contained partly or wholly
within the greater ones. The larger tubes have inserted, for preference, at a point a
washer or block adjacent to and in connection with spiral springs against which the
smaller pipes or tubes press, the smaller tubes or pipes being made for preference with
blocked ends.
These pipes and springs when put together, form a circle and are inserted in packing
rings which are turned on the inner sides to the radius of the tubes or pipes.
1000

page_text: Metallic Packing for Pistons and for similar Purposes.
I, ARTHUR THOMAS ALLEN of No. 23 Christ Church Road, Sheffield in the County
of York, 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 of improvements. in metallic packing for pistons, and which may
also be applied to similar purposes refers to the construction of an elastic appliance to
act upon the piston rings so as to produce a vertical and lateral pressure.
The annexed sheet of drawings will render the specification clear and distinct.
Fig. 1, is a perspective view of a pair of Piston rings fitted with an elastic metallic
, packing made according to this invention.
-
Fig. 2, plan of portion of netallic packing part being shown in section, and plug
or slide block shown separately.
Fig. 3, similar plan illustrating a modified arrangement of the spring and slide
· block.
Fig. 4, cross section of piston rings and packing.
Fig. 5, cross section showing semicircular packing.
t In carrying out my invention in the manner illustrated in the drawings, I use four
or more lengths of metallic pipe or tube A, curved to the desired radius, and so that
put together they will form a complete circle or thereabouts.
I. connect these segments of tubing by means of solid or tubular plugs, or slide
blocks B, the ends of which marked C, slide: easily. in and out of the ends of the
tubes A, and the centre enlarged portion, forins a stop for the ends of the tubes to
abut against.
..Inside the tubes A, I place suitable coiled springs D, which may extend the whole
length of each segment of tube, bearing at each end against the slide blocks, or as
shown in Fig. 2 short springs may be used, bearing against a stop piece E fixed
centrally between each end of the curved tubes.
The tubular packings may be made from solid drawn tubing, or the edges may be
simply drawn together; the cross section may be circular as shown in Fig. 4, semi-
circular as shown in Fig. 5, or of other suitable cross section, and the springs may
also have the configuration of the tubes A.
The coiled spring D, for small-sizes of packings may be used in its straight form,
as it leaves the mandril upon which it is coiled, but I prefer to give the heavier
springs a permanent curve corresponding to that of the tubular packings, so that they
may work freely in the said tubes.
The slide-block or connection B, may be made from a piece of tube of smaller
diameter than the tubular packing A, its ends may be left open or may be closed as
preferred; it is secured to the tube by a cross pin; as shown in Fig. 3, or by any
other means.

page_text: The action of the springs is to press the sections of tubular packing apart, thereby
enlarging the diameter of the ring, and it will be seen on looking at the sectional
drawing Fig. 4, that such arrangement of diameter will not only expand the piston
rings F but press them apart vertically.
By enclosing the springs in tubes they are afforded protection, and are not so liable
to break, and the action of the tubular sections against the piston rings F is smooth,
and equally divided on all parts of the circle.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The improved tubular metallic packing, for the purpose specified, constructed
substantially as hereinbefore described and illustrated.
2. As an elastic metallic packing for Pistons, a tubular ring divided into sections
and containing suitable coiled springs for expanding same, substantially as described
and illustrated.
3. In a metallic packing for Pistons, and similar purposes, the combination with a
number of curved tubes forming a circle, of internal, coiled or otherwise suitably
formed springs, arranged to act together substantially as described and illustrated.
1000
ROBT. F. DRURY,
Agent for the Applicant.
ROBT. F. DRURY,
Agent for the Applicant.