AN IMPROVED METALLIC PACKING FOR PISTONS AND AIR PUMP BUCKETS
Year: 1880

page_text: LETTERS PATENT to Reuben Lowe Barker, of Newton Moor, in the County of
Chester, Engineer, for an Invention of "AN IMPROVED METALLIC PACKING
FOR PISTONS AND AIR PUMP BUCKETS."
PROVISIONAL SPECIFICATION left by the said Reubon Lowe Barker at the
Office of the Commissioners of Patents on the 23rd April 1880.
REUBEN LOWE BARKER, of Newton Moor, in the County of Chester, Engineer.
"AN IMPROVED METALLIC PACKING FOR PISTONS AND AIR PUMP BUCKETS."
In pistons of the ordinary construction one inner and two outer rings are usually
employed to form the packing.
Now my Invention consists in making the packing of one spiral ring only,
which I form from a plain annular casting in the following manner:-1 fix the
annular casting on a face plate or chuck in a lathe, turn its periphery true and of a
larger diameter than the cylinder it has to fit; it is then set out so as to forin one
or more spiral rings of any number of circles out of the same annular casting by
cutting spiral grooves of the required width through the before mentioned casting;
the spiral ring is then cut to the desired width, and a portion of the spiral ring is
cut away at each end of the groove, so that when the ends are drawn up and the
spiral ring compressed laterally and vertically it will form a solid annular spiral
ring. When the ends of the spiral ring are thus drawn up I turn it to or almost to
the exact diameter of the cylinder and to the required depth of the packing; the
spiral ring is pitched or set out, so as to allow the ends of the spiral ring to be in
any part of the circumference. The inner portion of the spiral ring may either bo
bored out truc or left with the crust or skin upon it as cast.
Or the spiral ring may be formed by cutting out a spiral groove of one or more
circles in loam or sand to the shape required, and casting it of any kind of metal,
afterwards drawing it up to the required diameter and depth laterally and vertically,
and placing the spiral ring on a face plate or chuck of a lathe, and turning it to
the necessary diameter of the cylinder and depth of packing, as before described.
Or the annular ring may be rolled or forged of steel or other metal to the shape
required and cut as before described. A single spiral ring thus made forms a
sufficient packing for a piston or air pump bucket, and no inner ring or spring is
needed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Reuben Lowe Barker in the Great Seal Patent Office on the 22nd
October 1880.
REUBEN LOWE BARKER, of Newton Moor, in the County of Chester, Engineer.
"AN IMPROVED METALLIC PACKING FOR PISTONS AND AIR PUMP BUCKETS."
In pistons of the ordinary construction one inner and two outer rings are usually
employed to form the packing.
Now my Invention consists in making the packing of one spiral ring only,
which I form from a plain annular casting in the following manner :-)
:-I fix the
annular casting on a face plate or chuck in a lathe, turn its periphery true and of a
larger diameter than the cylinder it has to fit; it is then set out so as to form one
or more spiral rings of any number of circles out of the same annular casting by
cutting spiral grooves of the required width through the before mentioned casting;
the spiral ring is then cut to the desired width, and a portion of the spiral ring is
cut away at each end of the groove, so that when the ends are drawn up and the
spiral ring compressed laterally and vertically it will form a solid annular spiral
ring. When the ends of the spiral ring are thus drawn up I turn it to or almost to
the exact diameter of the cylinder and to the required depth of the packing; the
spiral ring may be pitched or set out, so allow the ends of the spiral ring to be in
any part of the circumference. The inner portions of the spiral ring may either be
bored out true or left with the crust or skin upon it as cast.
Or the spiral ring may be formed by cutting out a spiral groove of one or
more circles in loam or sand to the shape required, and casting it of any kind of
metal, afterwards drawing it up to the required diameter and depth laterally
and vertically, and placing the spiral spring on a face plate or chuck of a lathe, and
turning it to the necessary diameter of the cylinder and depth of packing, as before
described.
Or the annular ring may be rolled or forged of steel or other metal to the shape
required, and cut as before described.
On the annexed Drawing Fig. 1 shews my improved metallic packing formed, as
herein described, uncompressed, and Fig. 2 shews the same compressed, as it would
be held in the cylinder. A single spiral ring thus made forms a sufficient
packing for a piston or air pump bucket, and no inner ring or spring is needed.
Having thus stated the nature of my lnvention, and described the manner of
performing the same, I declare that I claim,-
The metallic packing for pistons and air pump buckets formed of a single spiral
ring, as shewn and described.
In witness whereof, I, the said Reuben Lowe Barker, have hereunto set my
hand and seal, this Twenty first day of October, One thousand eight
hundred and eighty.
REUBEN LOWE BARKER. (L.S.)