A New or Improved Metallic Packing for Stuffing Boxes.
Year: 1889

page_text: Date of Application, 8th Oct., 1889
Complete Specification Left, 8th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
A New or Improved Metallic Packing for Stuffing Boxes.
We, WILHELM CORDTS of Schäferkampsallee No. 47 and JOHANN CARL ADOLF
PLETT, of Steinwürder, Hamburg, in the Empire of Germany, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object a metallic packing for stuffing boxes, which
essentially consists of a tube, forming externally a slender cone, while its inner
cylindric bore exactly corresponds to the diameter of the piston or sliding rod to be
packed.
The tube is provided with cuts or slits, the number of which depends on the
diameter of the inner bore, and which extend upwards or downwards for about
two thirds of its length. Said cuts or slits serve to give sufficient elasticity to
ensure in all cases a close contact between the tube and the piston or sliding rod
and to form at the same time lubricating grooves, thus producing a uniform and
economical lubrication.
The tube rests in a convenient conic bore provided in the neck of the stuffing box
and is held in position, after introducing a suitable ring of cord-or other convenient
packing, by means of the screw lid of the stuffing box. Said ring is intended to
ensure tight fit and neutralize the thermal expansion of the different metals. The
piston or sliding rod is securely guided in the tube, thus dispensing with the special
bottom or guiding boxes, hitherto employed for the purpose.
In the case of stuffing boxes that are not easily accessible the conic tube may be
either longitudinally halved and tightened by means of auxiliary pieces, or composed
of different halved tubes the external surfaces of which form together a cone, the
separate parts, relatively displaced to each other, being secured by means of
guide pins.
To apply the improved packing to old stuffing boxes, the latter are provided with
a metallic lining, bored to lit the cone of the packing tube.
Dated this 8th day of October 1889.
UNILLE OFBCIFICATION.
A New or Improved Metallic Packing for Stuffing Boxes.
We, WILHELM CORDTS of Schäferkampallee No. 47, and JOHANN CARL ADOLF
PLETT of Steinwärder, in the City of Hamburg, Empire of Germany, Engineers,
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 relates to stuffing boxes and has for its purpose to provide a durable
and efficient packing therefor while at the same time ensuring uniform and economical
lubrication.
To clearly illustrate the nature of this invention reference is mails to the annou
COMPLETE SPECIFICATION.
A New or Improved Metallic Packing for Stuffing Boxes.
We, WILHELM CORDTS of Schäferkampallee No. 47, and JOHANN CARL ADOLF
PLETT of Steinwärder, in the City of Hamburg, Empire of Germany, Engineers,
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 relates to stuffing boxes and has for its purpose to provide a durable
and efficient packing therefor while at the same time ensuring uniform and economical
lubrication.
To clearly illustrate the nature of this invention reference is made to the accou
panying drawing, in which
Fig. 1 is an elevational section of the packing and stuffing box,,
Fig. 2 an elevational section of a stuffing box of former type, having an auxiliary
piece for receiving the metallic packing inserted therein, and
Figs. 3, 4 and 5 illustrate details.
to clearly illustrate the nature of this invention reference is made to the accom.

page_text: The packing the proper H has externally the form of a slender cone and the
cross-section of its inner cylindric bore exactly corresponds to that of the shaft,
piston or sliding rod to be packed.
To ensure close contact between the sliding rod A and the tube H, the latter is
provided with a suitable number of longitudinal slits E, as shown by Figs. 3 to 5,
from each end to about two thirds of its entire length for the purpose of giving
ample elasticity to the packing. Said slits also serve as lubricating grooves, allowing
of a very uniform and economical lubrication of rod or shaft and packing.
The packing tube H is lodged in a conic bore provided in the body of the stuffing
box B and is packed by a ring R of cord or other suitable material which serves
to equalise small irregularities and neutralize the thermal expansion of the various
metals employed. The improved stuffing box is closed by a supplementary piece S
which is held in position by the screw lid L. The slide rod, shaft or piston is
securely guided in the tube and the special guiding boxes hitherto employed can be
dispensed with.
For stuffing boxes which are not easily accessible, the packing tube may consist
of two halves, the joining grooves of which serve for the same purpose as the slits
referred to, and are maintained by connecting pieces s.
If the improved metallic packing is to be applied to old stuffing boxes, a suitable
metallic lining M, so shaped as to fill out the superfluous space of the box is
employed as a supplement as shown in Fig. 2.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
A metal packing for stuffing boxes which consists either of a conic tube H lodged
in a corresponding cavity, and the cylindric bore of which is in close contact with
the respective slide, piston rod or shaft owing to the elasticity produced by slits E,
or of a longitudinally halved tube H provided with slits E and having its
halving grooves maintained by connecting pieces s substantially as illustrated and
described.
Th
LI 1800
W. CORDTS.
J. C. A. PLETT.
By Huelser & Co.,
Attorneys.