Improvements in or connected with Lead or other Pencils.
Year: 1895

page_text: Date of Application, 27th June, 1895
Complete Specification Left, 27th Mar., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in or connected with Lead or other Pencils.
I, THOMAS WILSON, of Coledale Pencil and Penholder Works, Keswick, in
the County of Cumberland, Pencil Manufacturer, do hereby declare the nature
of this invention to be as follows:-
This invention relates primarily to leads for filling or refilling case pencils but is
also applicable for ordinary wood covered pencils and is designed to provide a
self-fitting firm gripping lead for pencil and pencil cases.
For case pencils leads or fillings have hitherto been made cylindrical, and owing
to the accuracy with which the leads must fit the points many very valuable ones
are rendered useless on account of difficulty in getting points to fit them.
This invention consists essentially in forming the length of lead (or other pencil
material) with one or more feathers or ribs flutes or the like running longitudinally
on the surface sufficiently fine to be easily removed by the pressure exerted upon it
while passing through the end or point of the pencil case.
The invention is to be applied to points or leads made of black lead plumbago
graphite coloured chalks aniline ink or other material for pencils.
In carrying out the invention the die of the moulding apparatus is formed with
one or more flutes or serrations of the desired shape and the lead (or other material)
as it issues therefrom has a corresponding flute or feather upon its surface. The
feather or flutes may be straight or spiral.
In lead pencils covered with cedar or other wood the lead so formed will not be
liable to become loose or fall out but will be so firmly fixed as to render it
impossible for them to slip or move.
Dated this Ofth day of June 1805
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Lead or other Pencils,
I, THOMAS WILSON, of Coledale Pencil and Penholder Works, Keswick, in
the County of Cumberland, Pencil Manufacturer, 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 :-
This invention relates primarily to leads for filling or refilling case pencils but is
also applicable for ordinary wood covered pencils and is designed to provide a
self-fitting firm gripping lead for pencil and pencil cases.
For case pencils leads or fillings have hitherto been made cylindrical and owing
to the accuracy with which the leads must fit the points many very valuable ones
are rendered useless on account of difficulty in getting points to fit thein.
This invention consists essentially in forming the length of lead (or other pencil
material) with one or more feathers or ribs, flutes or the like running longitudinally
on the surface sufficiently fine to be easily removed by the pressure exerted upon
while passing through the end or point of the pencil case.
it

page_text: The invention is to be applied to points or leads made of black lead plumbago
graphite coloured chalks aniline ink or other material for pencils.
It will be fully described with reference to the accompanying drawings in which
a few examples magnified or enlarged are shown.
Fig. 1. shows the lead with one rib or slight projection running along its length.
Fig. 2. shows the lead with three such ribs or projections.
Fig. 3. shows the lead fluted from end to end, forming a number of such ribs on
the surface.
Fig. 4. shows the invention applied to an ordinary cedar pencil.
In carrying out the invention the die of the moulding apparatus through which
the lead is drawn is formed with one or more flutes or serrations, of the desired
shape, and the lead A (or other material) as it issues therefrom has a corresponding
rib or feather a upon its surface. The feather or flutes may be straight or spiral.
The leads A when made fluted in this way fit full into the case points of gold,
silver and other metal pencil cases and at the same time the fine edges of the ribs
formed upon the lead will break away to fit a tight point. They may be made as
shown with one three eight or any number of ribs according to the size of the lead.
In the case of very fine leads one only would by preference be employed. Instead
of the ribs being straight they may be made to take a spiral or twisted form around
the lead.
The invention will also be found applicable and valuable for drop action cases as
it will enable the jaws of same to get a better grip of the lead.
For ordinary pencils covered with cedar or other wood the lead so formed will
be firmly gripped and not be liable to become loose or fall out as is often the case
now that the black lead strips are annealed very largely. The ribs formed by the
fluting of the lead strip will bury themselves into the solid wood slats under
the pressure used to cramp the pencils together and then render it practicably
impossible for the lid to slip or move.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I now declare that what
I claim is.—
1. A strip of black lead or other material for pencils formed with one two or
more ribs or projections upon the surface substantially as and for the purpose
described.
2. The combination with the point of a metallic pencil case of a strip of lead or
other material fluted or formed with one or more ribs substantially as and for the
purpose described.
3. The combination with the wooden slats of which an ordinary pencil is formed
of a strip of black lead or other material fluted or formed with ribs which are
compressed into the wood substantially as described.
Dated this 26th day of March 1896.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and Londou, Patent Agents.