IMPROVEMENTS IN PISTON RACKING RINGS
Year: 1879

page_text: LETTERS PATENT to Jonathan Pickering, Globe Works, Stockton on Tees, for
the Invention of "IMPROVEMENTS IN PISTON RACKING RINGS."
Sealed the 15th August 1879, and dated the 20th February 1879.
PROVISIONAL SPECIFICATION left by the said Jonathan Pickering at the
Office of the Commissioners of Patents on the 20th February 1879.
JONATHAN PICKERING, Globe Works, Stockton on Tees.
PISTON PACKING RINGS."
"IMPROVEMENTS IN
These improvements consist in arranging and applying metallic springs to pistons
of steam-engines, hydraulic, pneumatic, and other machines requiring a uniformly
distributed circular pressure around the periphery, which is effected by means of
annular shaped springs, combined with and acted upon by a series of elliptical
springs forming arcs of circles. These elliptical springs being placed at suitable
intervals, thereby insuring a regular elastic bearing throughout the entire circum-
ference of the spring, producing an equalization of fitting surface with a minimum
of friction. These improved rings can be made to operate with the elliptical springs
attached either internally or externally, and may be cut into segments to suit the
requirements of circumstances.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jonathan Pickering in the Great Seal Patent Office on the 20th
August 1879.
JONATHAN PICKERING, Globe Works, Stockton on Tees.
PISTON PACKING RINGS."
'IMPROVEMENTS IN
These improvements consist in arranging and applying metallic springs to pistons
of steam engines, hydraulic, pneumatic, and other machines requiring a uniform
distributed circular pressure around the periphery, which is effected by means of
annular shaped springs, combined with and acted upon by a series of elliptical or
segmental springs forming arcs of circles.
These elliptical or segmental springs being placed at suitable intervals, thereby
securing a regular elastic bearing throughout the entire circumference of spring,
producing an equalization of fitting surface with a minimum amount of friction.
These improved rings can be made to operate with the elliptical or segmental
springs attached either internally or externally, and may be cut into segments to
suit the requirements of circumstances.
. And further to demonstrate and explain the principle of the arrangement and
uses of my improved method of applying the piston packing rings, a reference to the
Drawings will show. Fig. 1, A represents one of the segments forming the circum-
ference of the outer spring, and B on the same shows the elliptical or segmental
springs fixed internally; and C is an indent made to fix the springs in the position
required. Fig. 2 illustrates a combined plan of the springs ready for insertion in a
cylinder; and Fig. 3 is a cross section showing the channel to receive the springs B
and indent on sides of channel for securing the same.
Having thus described the nature and object of my said Invention, I declare that
what I claim and desire to be secured to me is, the general arrangement and combi-
nation of parts forming respectively my improvements in piston rings, substantially
in the manner and for the purposes hereinbefore described and shown on the
Drawings.
In witness whereof, I, the said Jonathan Pickering, have hereunto set my hand
and seal, this Twentieth day of August, in the year of our Lord One thousand
eight hundred and seventy-nine.