Year: 1889

page_text: Date of Application, 29th Apr., 1889
Specification Accepted, 1st June, 1889
Enclosure therefor.
I ANNIE MATILDA WOOD of 13 Delahay Street, Westminster in the County of
Middlesex, and Firs Cottage, East Sheen in the County of Surrey, Gentlewoman,
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 :—
My invention relates to an improved buoyant compound, for filling the watertight
compartments, decks, cellular and other spaces in ships of war passenger and other
vesseis, boats etc. and for other purposes requiring buoyancy. The said compound
may be constructed of any suitable shape according to the space it is proposed to-fill
or the uses the material may be put to, that is, it may be made up in blocks, slabs,
cubes, round, or even in mass though I do not confine myself to any particular
form. By the means hereafter stated I obtain a light buoyant waterproof mass, which
can be moulded into any convenient shape.
My compound is made with those of the following materials mixed in such
proportions as I find will givo the best results according to the purpose which I
require.
Cork, resin, marine glue, bitumen, pitch, tar shellac, wax, gum kauri, whalebone,
cane, bamboo chips, cocoa nut husks," "woodite" rubber, or euphorbia or other
analogous and similar gums.
Either cork, resin, marine glue or cork, resin and bitumen are essential in all the
compounds and to these are employed in the following proportions or proportions near
thereto, cork 65 parts, resin 10 parts, bitumen or marine glue 20 parts. To these may
be added any of the other materials according to the result to be obtained for example,
if I want extreme lightness without elasticity and with a very low absorbing power,
add cocoa nut husks, cane, bamboo chips and whalebone in the proportions of 10 to
per
20
cent.
If the material is required to be absolutely waterproof and impermeable to water,
I find it an improvement to use 10% of wax and 10 to 15 % of shellac or gui
ou 10 01 in 1801

page_text: "
If I require it slightly elastic or to stand compression I add to increase its resilience
5 to 10% of "woodite or of rubber or Euphorbia or analogous gums and generally
5 to 10% of pitch or tar when it is desired to keep the compound in a plastic state
for filling or moulding into irregular shaped spaces or compartments.
The materials are heated in a cauldron, and mixed into a mass until thoroughly
incorporated.
When the compound is made in blocks or slabs I may cover them with tin or lead
foil gutta percha, woodite, rubber and resin, I also make a mortar, envelope or
cover composed of equal parts of resin pitch, marine glue with 10% of kieselguhr
asbestos or whalebone powder or shreads mixed together and heated in a cauldron
which makes a cement to keep out the water and forms a watertight covering for the
blocks or may be used for cementing the material together. Sometimes enclose
the compound in millboard cases, resined or tarred on the in and outside, to keep
the material watertight. I may also enclose it in tin or wood boxes or waterproof
covering.
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.
1. The improved buoyant compound or material consisting of cork, resin and marine
glue or bitumen with cocoa nut husks, cane bamboo chips, or whalebone, or with
wax and shellac or gumkauri or with woodite, rubber euphorbia or analogous gums
as set forth.
2. As a covering or enclosing medium, or as a cementing medium for pieces of
buoyant material, the improved cement consisting of resin, pitch and marine glue
with kieselguhr asbestos or whalebone powder or shreds as set forth.
3. As a covering or enclosure for a buoyant material or compound, millboard or
cardboard boxes waterproofed as set forth.