Adjusting Black-lead, Slate, and other Pencils and Crayons.
Year: 1887

page_text: Date of Application, 28th Mar., 1887
Complete Left, 28th Dec., 1887
Complete Accepted, 3rd Feb., 1888.
Adjusting Black-lead, Slate, and other Pencils and Crayons.
I, TOM HENRY TAYLOR of Norwood House Heaton near Newcastle on Tyne in the
County of Northumberland Mechanical Engineer do hereby declare the nature of this
invention to be as follows:-
This Invention relates to black lead, slate and other pencils and has for its object to
provide means for their protection and adjustment while in use.
These Improvements consist in enclosing the pencil within a duplex or coupled
casing in such a manner that while the pencil is held without rotation in one part of
the casing it may be passed through a nut, die or helical coil in the other part of the
casing which may be rotated; the thread of the die nut or coil engaging with the
pencil causes the pencil to be withdrawn or propelled according as the nut die or coil
is rotated in one or the other direction. The thread upon the pencil may be previously
formed or it may be cut during or subsequent to insertion in the casing by means of
the die nut or coil. The die, nut or coil is in all cases formed of steel or other
suitable wire.
By the arrangement and combination hereinbefore indicated ordinary slate, black-
lead and other pencils may be very simply and efficiently protected and adjusted while
strength and security are obtained and very few working parts are employed.
Dated this 21st day of June A D 1886
WILLIAM E. HEYS,
70, Market Street, Manchester,
Agent for Applicant.

page_text: A New or Improved Method of and Apparatus for Protecting and
Adjusting Black Lead, Slate, and other Pencils and Crayons.
I, TOM HENRY TAYLOR of Norwood House Heaton near Newcastle on Tyne in the
County of Northumberland, Mechanical Engineer, 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 to black lead slate and other pencils and crayons, and it has
for its object to provide means for the protection and adjustment of their points.
These Improvements consist in enclosing the pencil or crayon within a duplex coupled
casing in such a manner that while the pencil or crayon is held without rotation in
one part of the casing it may be passed through a nut die or helical coil in the other
part of the casing which may be rotated; the thread of the die nut or coil engaging
with the pencil or crayon causes the pencil or crayon to be propelled or withdrawn
according as the nut die or coil is rotated in one or the other direction. The thread
upon the pencil may be previously formed, or it may be cut during or subsequent to
insertion in-the-casing by means of the die nut or coil. The die nut or coil is in all
cases formed of steel or other suitable wire.
The appended sheet of drawings illustrate in what manner my Invention may be
carried into practical effect.
Fig. 1 is a longitudinal section and Fig. 2 is a transverse section along the line AB
Fig. 1. In each of the Figures similar letters are employed to denote similar parts or
elements.
The casing consists of the holder C and the ferrule D through the point which the
lead or crayon E issues and is inserted. The forward part of the holder within the
ferrule is cut away or recessed for the reception of the wire spiral F which forms
the nut or die by means of which the pencil or crayon may be propelled or retracted.
As illustrated in the drawings the pencil or crayon is constructed with a square
section, but pencils or crayons having differently shaped cross sections may be em
ployed. The internal diameter of the wire spiral when a square pencil is used
should be about equal to the diameter across the flats of the pencil so that in
cutting the thread on the pencil the corners only are removed where the thread
intersects them as shown in Figure 1.
It is evident that the propulsion and retraction of the lead or crayon may be secured
by the rotation either of the spiral wire coil, or of the pencil, if the rotation of the
other is prevented. As illustrated in the drawings the nut is compelled to rotate with
the holder by means of the nib or feather G attached thereto and which fits into a
recess in the holder; the rotation of the pencil or crayon is prevented by a hollow
square within the point of the ferrule through which the pencil passes. The reverse
method of construction may be adopted, that is to say: the spiral may be attached to
the ferrule so as to rotate with it, while the pencil and the bore of the holder may

page_text: respectively be so shaped or constructed that although the pencil may slide in the
holder it cannot rotate therein. In either case the method of operating the pencil
will be the saine. The ferrule may be connected to the holder by turning its open end
into a groove formed in the holder as shown in Figure 1, and it is constructed so as to
rotate freely upon the holder.
1 desire it to be understood that I do not limit myself to the precise method of con-
struction illustrated by the appended drawings and hereinbefore described as this may
be considerably varied without departing from my Invention.
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 method of protecting and adjusting pencils and crayons by the propulsion
or retraction of the pencil or crayon through a die or nut consisting of a wire spiral;
substantially as hereinbefore described.
(2) A duplex or coupled casing for pencils or crayons in combination with a wire
die nut or coil; constructed arranged and operated substantially as hereinbefore
described.