IMPROVEMENTS IN ARTISTS' PENCILS
Year: 1879

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of
J. Brandt and G. W. von Nawrocki, Patent Agents, of No. 124, Leipziger
Strasse, Berlin, in the German Empire, for the Invention of "IMPROVEMENTS
IN ARTISTS' PENCILS." A communication by Johann Faber, of Nurnberg, in
the German Empire.
Sealed the 27th January 1880, and dated the 13th August 1879.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 13th August
1879.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W von
Nawrocki, Patent Agents, of No. 124, Leipziger Strasse, Berlin, in the German Empire.
"IMPROVEMENTS IN ARTISTS' PENCILS." [A communication by Johann Faber, of
Nurnberg, in the German Empire.]
This Invention relates to that description of artists' pencils in which a loose lead
situated in a hollow stem is protruded by hand as it wears away, the end of the
stem being slit and caused to nip the lead by means of a conical ferrule or cap
screwed thereon. The screw threads on the cap and stem of such pencils are apt to
get worn, in which case the lead is not held firmly and the pencil becomes useless.
According to the present Invention the said screw threads are entirely dispensed
with, the lead being securely held in the split stem by means of a sliding tubular
ferrule or cap, so arranged that by sliding it forwards the stem and lead are released
for adjustment, and on sliding it backwards it compresses the split end of the stem
so as to nip the lead. For this purpose either the outer surface of the split stem
may be cylindrical and the inner surface of the cap tapering, or the stem may be
tapering externally and the cap cylindrical. The cap is provided with a bead at
its inner end which works up and down within an annular space on the outer
casing of the pencil, so that the cap though free to slide up and down to the
required extent cannot become detached from the pencil. In some cases the cap
may consist simply of a ring sliding up and down the split stem.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by¨¨
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office on
the 28th January 1880..
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, Patent Agents, of 124, Leipziger Strasse, Berlin, in the German Empire.
"IMPROVEMENTS IN ARTISTS' PENCILS." A communication by Johann Faber, of
Nurnberg, in the German Empire.
This Invention relates to that description of artists' pencils in which a loose lead

page_text: situated in a hollow stem is protuded by hand as it wears way, the end of the stem
being slit and caused to nip the lead by means of a. conical ferrule or cap screwed
thereon. The screw threads on the cap and stem of such pencils are apt to get
worn, in which case the lead is not held firmly and the pencil becomes useless.
According to the present Invention the said screw threads are entirely dispensed
with, the lead being securely held in the split stem by means of a sliding tubular
ferrule or cap, so arranged that by sliding it forwards the stem and lead are
released for adjustment and on sliding it backwards it compresses the split end of
the stem so as to nip the lead. For this purpose either the outer surface of the
split stem may be cylindrical and the inner surface of the cap tapering, or the stem
may be tapering externally and the cap cylindrical. The cap is provided with a
bead at its inner end which works up and down within an annular space on the
outer casing of the pencil, so that the cap, though free to slide up and down to the
required extent, cannot become detached from the pencil. In some cases the cap
may consist simply of a ring sliding up and down the split stem.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an elevation, and Figs. 2 and 3 are sections, partly in elevation, of one
construction of holder according to this Invention; and Figs. 4, 5, and 6 are
sectional plans respectively on the lines a, b, c, d, and e, f, of Fig. 2. In this con-
struction the tube a for holding the pencil b is split for part of its length and is
fixed to the stem A. It is enclosed within a tube d, the outer end of which, c, is
reduced to a smaller diameter with a sloping shoulder, and its inner end has a lip f
projecting outwards, so as to act as a stop against the contracted mouth of a
ferrule that is fixed to the stem A. As shewn in Fig. 3 the tube d is drawn out
as far as its stop f will permit, the tube a being thus left free to expand, so that a 2
pencil or crayon can be freely introduced or removed. When it has been introduced
the tube d is drawn inwards, as shewn in Fig. 2, its contracted mouth c causing the
end of the split tube a to collapse and firmly hold the pencil or crayon within it.
Fig. 7 is an elevation and Fig. 8 a vertical section of another form of pencil or
crayon holder according to this Invention; Fig. 9 is an elevation, partly in section, 3
with the clamping ring slid down; and Fig. 10 is a plan shewing the end of the
split tube and its clamping ring; bis the stem, to which is attached the split tube a
tapered on its external surface, on which the clamp ring is slid so as to collapse it,
and thereby held firmly the pencil or crayon c.
Having thus described the nature of the said Invention, and in what manner the 3
same is to be performed, as communicated to me by my correspondent, I would have
it understood that no general claim is made to securing a pencil or crayon in its
holder by sliding a clamping ring along a tapered portion of a split tube containing
the pencil or crayon, but I claim,—
The construction of pencil holder herein described with reference to Figs. 1 to 6 4
inclusive of the accompanying Drawings.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have here-
unto set my hand and seal, this Sixteenth day of January, in the year of our
Lord One thousand eight hundred and eighty.
GERARD WENZESLAUS VON NAWROCKI. (L.S.)