IMPROVEMENTS IN PACKING FOR VALVES AND JOINTS
Year: 1884

page_text: This Specification was, upon the 20th day of August 1887, amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
1, FRANCIS CARBUTT BELL, of 118, Southwark Street, London, in the county of
Middlesex, Asbestos Manufacturer do hereby declare the nature of my said
invention for IMPROVEMENTS IN PACKING FOR VALVES AND JOINTS to be as
follows:-
--
The object is to provide for valves and steam pipe joints and connections where
heat, moisture, or grease may affect the material, packing which combines the
properties of resilience, capacity to resist the actions of heat, moisture and grease
and yet so durable that junctions can be opened or severed and again be made with
the same packing.
For this purpose I employ combined in novel manner indrubber or resilient
gum or pitch and woven asbestos. The india rubber is rolled or made into sheets
of the required thickness and is faced on each side with asbestos cloth saturated
with caoutchouc or other gum and caused to adhere to the india rubber or like
substance by means of rubber solution or other suitable cement. The said packing
has thus an elastic centre with asbestos facings the latter coated or saturated with
caoutchouc or other gum.
Packing pieces of the required size and shape are cut from the sheets in the
form of flat rings washers or pieces. In some cases the inner and outer edges of
the said packing piece so formed are enclosed with woven asbestos or an asbestos
coating.

page_text: I FRANCIS CARBUTT BELL of 118 Southwark Street London in the County of
Middlesex Surrey Asbestos Manufacturer, do hereby declare the nature of my
invention for "IMPROVEMENTS IN PACKING FOR VALVES AND JOINTS and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
The object is to provide for valves and steam pipe joints and connections where
heat moisture or grease may effect the material packing which combines the
properties of resilience capacity to resist the actions of heat moisture and grease
and so durable that junctions can be opened or severed and again be made with the
same packing.
For this purpose I employ combined in novel manner india-rubber or resilient
gum or pitch and woven asbestos. The india rubber is rolled or made into sheets
of the required thickness and is faced on each side with asbestos in the form of woven
cloth saturated with caoutchouc or other like gum and caused to adhere to the india
rubber or like substance by means of rubber solution or suitable cement. The said
packing has thus an elastic centre with asbestos facings, the latter coated or saturated
with caoutchouc or other like
gum.
Packing pieces of the required size and shape are cut from the sheets in the form
of flat rings washers or pieces. In some cases the inner and outer edges of the
said packing piece so formed are enclosed with woven asbestos or an asbestos
coating.
When the packing is used where it is necessary sometimes to break and remake
a joint as in the case of man hole doors or covers it is advisable to rub the flange
of the joint next the cover with black lead or french chalk.
In order that the construction of the packing may be clearly understood I have
appended a sheet of drawings containing three views of packing constructed in
accordance with my invention.
Fig 1 is a perspective view of a sheet of rubber faced on each side with woven
asbestos or asbestos cloth from which rings washers or other forms may be cut as
shown by the dotted lines for the purpose of making jointing pieces.
Fig 2 is a sectional view of a pipe joint showing the packing in position.
Fig 3 is a perspective view of a ring shaped piece faced on each side on the inner
and outer edge surfaces with woven ashestos. In these views is the rubber or other
like gum or pitch made into sheets by rolling or otherwise in any well known or
suitable way. b facings of woven asbestos saturated with caoutchouc or other gum
and attached to a by rubber solution or cement.

page_text: 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 Combining india rubber or like gum-and-woven asbestos, the latter on
both sides of the former for packing for valves and joints substantially as herein
setforth.
Second. First Combining india rubber or like gum and woven asbestos when the
latter has been saturated with rubber or like gum for packing substantially as
setforth.
Third Second Combining india rubber or like gum with woven asbestos the latter
being applied on both the faces and edges of packing pieces substantially as setforth.
Dated this 27th day of September 1884.