Improvements in Slate Cleaners.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Slate Cleaners.
I, ROBERT CURTIS WALL, -Accountant, of 11, New King Street, Bath, in the
County of Somerset, do hereby declare the nature of this invention, as com-
municated to me from abroad by Alfred Wall, Schoolmaster, of Brisbane,
Queensland, to be as follows:-
My invention has for its object improved school slate cleaners, so constructed
that they may be attached to the pencil holder, box, or case.
In carrying my invention into practical effect I make a rod or bar of wood,
metal, or other suitable substance, having formed at one end thereof a tongue.
This tongue, which has indentations or corrugations formed upon it, or has its
surface otherwise suitably roughened, is tapered off somewhat from the centre
towards the point where it joins the said rod or bar and has its free end rounded.
I form on the said rod or bar, at the point where the tongue joins it, a projecting
shoulder. I now take a suitably shaped piece of sponge, or other absorbent
material or rubber, in the base of which is formed a recess or hole of rather
less diameter than the said tongue; this tongue is then dipped into any suitable
adhesive substance, and thrust into the hole or recess in the sponge, or the like,
The rod or bar is of such
where it is retained by virtue of the said adhesive.
diameter that it firmly fits into the pencil holder to which the cleaner is to be
attached, the said shoulder preventing the rod or bar from passing too far into
the pencil holder.
When the cleaner is to be attached to a pencil case or box, I form a tongue
(of the shape previously described, and having a suitably roughened surface)
either on the end or other suitable part of the box or of the lid thereof; to this
tongue I attach a piece of sponge or other absorbent material or rubber by means of
adhesive substance, as previously described. This piece of sponge or other suit-
ably substance is preferably in the shape of the segment of a sphere, having a
hole in the base thereof to receive the said tongue, and it may, if required, be
further secured in position by means of one or more bands of string tightly
drawn and fixed round the base thereof.
In a modified form of my cleaner, suitable for fitting into the cover of a
tubular pencil box, I take a circular block or disc of wood, metal, or other suit-
able substance. In this disc or block I form a rebate, about two thirds of the
depth thereof, or thereabouts, the rebated part of the disc or block being of
such diameter that it just fits into the top of the pencil box cover, and the part
not so rebated forming the top of the box cover.
Projecting at right angles to this disc or block, at the rebated side thereof, I
form a roughened tongue of the shape previously described, and I attach to this
tongue a piece of sponge, or other absorbent material or rubber, preferably in
the shape of a segment of a sphere, also as previously described.
When not required for use, this cleaner and the rebated part of the disc or
block to which it is fixed, are thrust into the top of the pencil box, which

page_text: latter may be fitted with a transverse partition at a suitable point, so as to form
a receptacle in the top of the cover to receive the said cleaner.
When required for use, the cleaner and disc are withdrawn from the cover.
Dated this 7th day of December 1897.
CASTLE SMITH,
Invention" Office, Mitre Court, Fleet Street, London, E.C.,
Agent for the Applicant,
provements in State Cleaners.
I, ROBERT CURTIS WALL, Accountant, of 11, New King Street, Bath, in the
County of Somerset, 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:_
1
My invention has for its object improved slate cleaners, so constructed
that they may be attached to the pencil holder, box, or case.
In carrying my invention into practical effect I make a rod or bar of wood,
or other suitable substance, having formed at one end thereof a tongue.
This tongue, which has indentations or corrugations formed upon it, or has its
surface otherwise suitably roughened, is tapered off somewhat from the centre
towards the point where it joins the said rod or bar, and rounded. I form on
the said rod or bar, at the point where the tongue joins it, a projecting shoulder
I now take a suitably shaped piece of sponge, or other absorbent material or
rubber, in the base of which is formed a recess or hole of rather less diameter
than the said tongue: this tongue is then dipped into any suitable adhesive
substance, and thrust into the hole or recess in the sporge, or the like, where
it is retained by virtue of the said adhesive. The rod or bar is of such diameter
that it firmly fits into the pencil holder to which it is to be attached, the said
shoulder preventing the rod or bar from passing too far into the pencil holder.
When the cleaner is to be attached to a pencil case or box, I form a tongue
(of the previously described shape, and having a suitable roughened surface)
either on the end or other suitable part of the box or of the lid thereof: to this
I attach a piece of sponge or other absorbent material or rubber by means of
adhesive substance, as previously described. This piece of sponge or other suit-
able substance is preferably in the shape of a segment of a sphere, having a hole
pressed in the base thereof by and to receive the tongue, and may be further
secured in position by means of one or more bands of string tightly drawn and
fixed round the base thereof.
In a modified form of my cleaner, suitable for fitting into the cover of a
tubular pencil case, I take a circular block or disc of wood, metal, or other suit-
able substance. In this disc or block I form a rebate, about two thirds of the
depth thereof, or thereabouts, the rebated part of the disc or block being of
such diameter that it' just fits into the top of the pencil box cover, and the part
not so rebated forming the top of the box cover.
Projecting at right angles to this disc or block, at the rebated side thereof, I
form a roughened tongue of the shape previously described, and I attach to this
tongue a piece of sponge, or other absorbent material or rubber, preferably in
the shape of a segment of a sphere, also as previously described.
When not required for use,
block to which it is fixed,
this cleaner and the rebated part of the disc or
are thrust into the top of the pencil box, which

page_text: latter may be fitted with a transverse partition at a suitable point, so as to form
a receptacle in the top of the cover to receive the said cleaner.
When required for use, the cleaner and the disc are withdrawn from the cover.
Slate cleaners constructed as above described are illustrated by the accom-
panying illustrations, by the aid of which the invention will be better understood.
Of these drawings:-
Figs. 1 and 2 shew the two parts of, and Fig. 3 these two secured together,
in the form in which the end of the cleaner is intended to be fitted into the end
of a pencil holder.
Figs. 4 and 5 shew the parts, Fig. 6 these two together, in the case where the
cleaner is formed on or attached to the end of a pencil case or box.
Fig. 7 shews similar parts to Fig. 6, but with the base of the sponge further
secured by string or the like.
Fig. 8 is a view shewing the holder attached to a block of wood shaped to fit
into a recess in a pencil case or box, and Fig. 9 is a sectional view shewing such
block inserted into the end of a pencil case or box.
The cleaner illustrated in Figs. 1, 2, and 3 consists of a bar of wood, metal,
or other material of circular section having one end A. formed to fit into the
end of a pencil holder, and provided with a shoulder B to prevent it being
forced into such holder or case too far.
The opposite end or tongue C is tapered and rounded at its free end and
roughened, and is intended to be secured in a correspondingly shaped, but
slightly smaller, recess D), formed in the base of a sponge or the like (Fig. 2)
as shewn in Fig. 3, after it has been coated with a suitable adhesive.
As shewn in Figs. 4, 5, and 6 and 7 the tongue C instead of being formed on
one end of a bar, is attached to or formed on one end of a pencil case or box E
and the sponge is secured to it as above described, said sponge or the like being
in the form of a sphere (Fig. 7) or of other shape.
Figs. 8 and 9 shew the tongue C attached to or formed in one with a block F
formed to fit into the end of a pencil case or box E.
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) A slate cleaner formed of a bar shaped to fit into a pencil holder at one
end and having a tongue at its opposite end to which is affixed a sponge or
the like substantially as described and illustrated by Figs. 1, 2 and 3 of the
accompanying drawings.
(2) A slate cleaner consisting of a tongue formed on or attached to a pencil
case or box and having affixed to it a sponge or the like substantially as described
and illustrated by Figs. 4, 5, 6 and 7 of the accompanying drawings.
(3) A slate cleaner consisting of a block shaped to fit into the end of a pencil
case or box and provided with a tongue to which is affixed a sponge or the like
substantially as described and illustrated by Figs. 8 and 9 of the accompanying
drawings.
Dated this 31st day of s
1000
"
"
CASTLE SMITH,
Invention Office, Mitre Court, Fleet Street, London, E.C.,
Agent for the Applicant.