Tablets, and the like, also for Coating Building and other Material, such as Ledges, Copings, Ornaments, Barrels, Cases, and other similar Articles.
Year: 1884

page_text: Tablets, and the like, also for Coating Building and other
Material, such as Ledges, Copings, Ornaments, Barrels, Cases,
and other similar Articles.
I HENRY GARDNER of 166 Fleet Street, City of London, Patent Agent, do
hereby declare the nature of the said invention for "IMPROVED SURFACING
COMPOUND FOR USE AS BLACK BOARDS, SLATES, TABLETS AND THE LIKE, ALSO
FOR COATING BUILDING AND OTHER MATERIAL SUCH AS LEDGES, COPINGS,
ORNAMENTS, BARRELS, CASES, AND OTHER SIMILAR ARTICLES," a communication
from Adolf Höxter of Offenbach a/m and Georg Schutter of Lohr, Bavaria,
Germany, Merchants to be as follows :—
The object of this invention is to prepare or compound certain ingredients to be
spread upon plain smooth surfaces, rigid or flexible, and to render the compound
suitable for receiving writings or marking by chalk, crayons, or similar material
which can be easily and completely removed effaced or wiped out without leaving
indications of such writing or marking.
The invention is applicable for use as the black board of the Lecture room, as
school slates, as tablets, also as a coating for shelves, tables, ornaments and exposed
parts of building material, of metal, stone, or wood for coating Millboards, paste-
boards, leather or other substance or body.
According to this invention the material to be coated is first saturated or washed
with a solution of boiled linseed oil (dried) and oil of turpentine in suitable
proportions for the material under operation.
This substance is allowed to dry either by natural or by artificial means and is
then coated with a compound composed of say Shiver cleaned, English filing
up, Terebine and Varnish, diluted with Nigrosine soluble in water or spirit
sufficient to produce the necessary blackness.
This composition by exposure becomes hard and is then rubbed or ground to
smoothness and is capable of being polished.
If lines, such for instance as those in music, are required in the surface, they are
cut by a tool and then filled up with a composition of mastic and colophony with
which a little cinnabar or other coloring matter can be mixed to make the lines
permanently visible.
DD 1981

page_text: Tablets, and the like, also for Coating Building and other
Material, such as Ledges, Copings, Ornaments, Barrels, Cases,
and other similar Articles.
I HENRY GARDNER of 100 Fleet Street, city of London, Patent Agent, do
hereby declare the nature of the said invention for "IMPROVED SURFACING
COMPOUND FOR USE AS BLACK BOARDS, SLATES, TABLETS AND THE LIKE, ALSO
FOR COATING BUILDING AND OTHER MATERIAL, SUCH AS LEDGES, COPINGS,
ORNAMENTS, BARRELS, CASES, AND OTHER SIMILAR ARTICLES a communication
from abroad by Adolf Höxter of Offenbach o/m and Georg Schutter of Lohr,
Bavaria Germany, Merchants and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
"
The object of this invention is to prepare or compound certain ingredients to be
spread upon plain smooth surfaces, rigid or flexible, and to render the compound
suitable for receiving writings or markings by chalk, crayons or similar material
which can be easily and completely removed, effaced, or wiped out without leaving
indications of such writing or marking.
'
The invention is applicable for use as the Black board of the Lecture room, as
school slates, as tablets, also as a coating for shelves, tables, ornaments and exposed
parts of building material, of metal, stone or wood, for coating millboards, paste-
boards, leather or other substance or body.
For the purpose of this invention a planed or planished surface of wood, metal
or other material is coated (saturated) with a composition of about one third ()
boiled linseed oil, a siccative, and oil of turpentine which will soak proportionately
into the whole surface.
After say 12 hours or more according to the atmosphere or by an artificial
drying it permits the surface to receive a varnish or body composed of Shiver
cleaned, English filling up which has been mixed with 1 of Terebine and
Tvarnish, diluted with Nigrosine, soluble in water or spirit as much as is
necessary to give blackness (these proportions are variable to suit the ground or
material).
This composition laid on the surface to a thickness of 4-5 Mm is allowed to dry
in the air or by artificial means and becomes hardened more and more, day to day,
and at last, completely petrified like.
Notice Boards and also tablets for school children which are to be prepared with
lines of any nature and form, must be furnished with these lines before the
composition is completely hardened, through incising with a tooth plane, and these
incisions will be filled up with a composition of Mastic and Colophony which
is mixed with a little Cinnabar, if the lines shall be red, with a proportionate
substance if the lines are to be of other colour.
After the complete hardening of these lines and the whole mass, the surface can
be planished, either with artificial stones, prepared for this purpose or with other

page_text: polishing tools in such matter that the surface (board, table etc) is completely and
brightly polished.
The material of these prepared surfaces (boards tablets etc) may be of wood,
metal, plate, pasteboard, leather, or of other natural or artificial material or
materials and these surfaces can be inscribed with all white or coloured crayons of
chalk or any other substance.
The inscriptions or markings are never effaced through dry wisking but by
sponging with water nothing can remain, the surface being perfectly cleaned.
The composition of the surfaces become so hardened and petrified like that it
never requires renewing, as is the case of the varnished and painted boards hitherto
in use in all schools, in which boards a faint appearance of the inscription or
writing is left, besides which the surface is gradually removed until the wood of the
board is seen. This is never possible by the boards and tablets prepared by this
new invention because the surfaces are petrified and always remain in the same
perfect state as originally.
Boards and slate like tablets for children prepared on this new method have
other advantages. The Tablets do not break, as the tablets and boards of slate,
because their material is unbreakable, neither do the points or ends of white or
coloured crayons, of chalk, or any substance crumble;-the detestable cracking and
spurting of the points will be thus avoided, the inscription for reading will be
plain and distinct;-the eyes of the children will not be tired as is the case with
ordinary slates through the surface getting greasy.
In the case of Home lessons the writing is not effaced through ordinary usage,
consequently the children always bring their exercises to school in the best
condition, not half effaced as by the tablets of slate, and on the other hand,
sponging with water every part of the inscription is effaced.
It is evident that this invention is available for the manufacture of many other
objects because the surfaces are petrified like and is therefore suitable for buildings,
copings, ornaments, for barrels cases etc.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The method and manufacture of surfaces and objects of every kind in wood,
metal, pasteboard, leather and other natural or artificial materials in connection
with a composition of shiver cleaned, filling up and other stuffs particularly the
manufacture of boards and tablets for the school and children as set forth.
The 2nd day of September 1885