The Manufacture of an Improved Engine Packing.
Year: 1889

page_text: Date of Application, 29th May, 1889.
Complete Specification Left, 26th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
The Manufacture of an Improved Engine Packing.
We, ROBERT WILLIAM HENRY MCDOWELL of Salters Court, Bow Lane in the
city of London, Manufacturer, and CHRISTIAN LUDWIG ENGOLF MELSOM of
1 Regency Square Kennington in the county of Surrey, Engineer do hereby
declare the nature of this invention to be as follows:-
This invention relates to the combination of asbestos and other materials to
form a packing which is practically indestructible by heat, is not affected by water
or moisture and being elastic is particularly suitable for untrue rods and generally
for high pressure and triple expansion engines.
In carrying out this invention we take a wire of soft metal such as lead and
coat it with india rubber we then plait it round with asbestos, any number of
these plaited wires are then plaited together to give the required thickness. A
layer or layers of india rubber is or are then placed at the base and the packing
thus made is surrounded on three sides or wholly by a strong asbestos cloth, the
packing being of any desired section.
In some cases we do without the asbestos cloth covering the india rubber being
plaited in with the wire and asbestos or it may be dispensed with the great
feature of the invention being the securely plaiting of the wires and asbestos
together so that as the packing wears down there is no possibility of the wire or
asbestos separating.
300
1000
G. F. REDFERN & Co.,
4. South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
The Manufacture of an Improved Engine Packing.
We, ROBERT WILLIAM HENRY MCDOWELL, of Salter's Court, Bow Lane, in the
city of London, Manufacturer, and CHRISTIAN LUDVIG ENGOLF MELSOM, of
1, Regency Square, Kennington, in the county of Surrey, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:
This invention relates to the manufacture of an improved engine packing by the
combination of asbestos and other materials to form a packing which is practically
indestructible by heat, is not affected by water or moisture and being elastic is
particularly suitable for untrue rods and generally for packing for the stuffing boxes
of all kinds of steam, hydraulic and other fluid pressure engines.
In carrying out this invention we take a wire of suitable soft metal or alloy and
coat it with india rubber solution; we then plait or braid it round with suitable yarn
such as asbestos, or hemp; any number of these plaited or braided wires are then
plaited together to give the required thickness. A layer or layers of india rubber is
or are then placed at the back and the packing thus made is then preferably sur-
rounded on three sides or wholly by a strong asbestos cloth or other suitable fabric
the packing being of any desired section.
•
In order to enable our invention to be fully understood we will describe how it can
be carried into practice by reference to the accompanying drawing, in which,
Figure 1 is a section through a piece of our improved packing, and
Figure 2 is a section on the line za of figure 1.

page_text: a, a, a represent the wires of soft metal or alloy which after being coated with
rubber solution are plaited or braided round with asbestos or other suitable yarn b and
a number of the braided wires are then plaited together as shewn to the required
thickness; c represents the layer of india rubber at the back of the packing and d is
the asbestos cloth which in this case is placed round three sides only of the
packing.
In some cases we do without the asbestos cloth covering, the india rubber being
plaited in with the wire and asbestos, or the india rubber may be dispensed with,
the important feature of the invention being the securely plaiting of the wires and
asbestos together so that as the packing wears down there is practically no possibility
of the wire or asbestos separating and so being liable to be blown out of the stuffing
box, a continuous metal and asbestos surface being always presented to the surface of
the piston or other rod.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :
The manufacture and use of the improved engine paeking hereinbefore described.
such packing being made by plaiting together wires of any suitable soft metal or
alloy braided with asbestos or other suitable yarn and with or without india rubber,
the whole being surrounded or partly surrounded if required with asbestos cloth or
braided or other suitable fabric substantially as set forth and illustrated in the
accompanying drawing.
Dated the 26th day of February 1890
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.