IMPROVEMENTS IN PACKINGS FOR PISTONS
Year: 1884

page_text: "
COMPLETE SPECIFICATION.
I TOM HENRY TAYLOR of Number 67 Shirley Road Freemantle near
Southampton Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN PACKINGS FOR PISTONS," and in what manner the same is
to be performed to be particularly described and ascertained in and by the
following statement:―
This invention has for its object improvements in packings of Pistons.
For packing pistons I employ two split packing rings they are approximately
L shape in section, that is to say there is a flange on one side of the ring around
the interior. When the packing rings are in their places in the cavity of the
piston the flanges of the two rings face each other at a distance apart whilst the
unflanged sides of the two rings are nearly in contact. Between the flanges of
the packing rings two other rings are placed, these are-not split or broken but
solid and they are forced apart by coiled springs which are confined between them.
The solid rings are thus made to press upon the flanges of the packing rings.
Now the surfaces upon the packing rings and the solid rings which are thus
pressed together by the springs are inclined, consequently the pressure of the
springs (although exerted in a direction parallel to the axis) nevertheless tends to
expand the packing rings and maintain them in steam tight contact with the walls
of the Cylinder.
The Drawings annexed represent a metallic piston packing constructed in

page_text: RR are the solid rings with inclines corresponding to the inclines on the flanges
of the packing rings.
S. S. are springs:
A A are the spring holders they stand upon one of the rings R and a peg in the
Centre of the base entering a hole in the ring keeps the spring holder in place.
W W are washers.
Packings thus constructed. are very elastic they can be manufactured without
any special appliances and are applicable to existing pistons. They present large
frictional surfaces and thus tend to preserve the true circular form of both cylinder
and piston.
They also have the advantage of great range for compression or pressure exerted
which is easily and safely adjusted. The ratio of pressure on the junk ring and
walls of the cylinder is regulated by alteration of the angle.
- The arrangement admits of variation and in some cases two rings only may be
employed.
The same size spring is used for various diameters of pistons it being only
necessary to alter the pitch as circumstances may require.
The packing is scientific in construction easily admitting of exact calculations
and the effect of a washer more or less under the springs may be easily determined
by any engineer or mechanić of ordinary ability.
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
First The combination in packing rings P with inclines upon them the rings R
with corresponding inclines and the springs S operating upon the rings R and so
indirectly to expand the rings P substantially as described.
Second A packing similarly constructed with two rings a ring P and a ring R
substantially as described.
Third-My improved packing for pistons substantially as herein described and
represented by the annexed Drawings.
Dated this 31 day of January 1884