Year: 1898

page_text: Date of Application, 18th Oct., 1898-Accepted, 23rd Dec., 1898
I, FREDERICK WILLIAM MUSSON, of No. 1410, Marquette Building, Chicago,
County of Cook and State of Illinois, United States of America, Gentleman, do
hereby declare the nature of my invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to pencils and has for its object to provide a new and improved
pencil of which the following is a description, reference being had to the accompanying
drawings, wherein
Figure 1 is a view of a pencil embodying my invention;
Figure 2 is a view of the pencil with the parts separated so as to more clearly show
the construction ;
Figure 3 is an enlarged section through the pencil;
Figure 4 is a section on line 4-4, Figure 3;
Figure 5 is a section on line 5-5, Figure 3;
Figure 6 is a section through the pencil with parts omitted showing a modified
construction ;
Figure 7 is a section on line 7-7, Figure 6;
Figure 8 is a view of the lead used in the pencil, the lead being screw-threaded
throughout its length;
Figure 9 is a view showing a modified construction ;
Figure 10 is a view of Figure 9 in part section with the tip removed;
Figure 11 is a detail view of the screw-threaded tube adapted to be inserted in the
pencil holder;
Figures 12, 13, 14, 15 and 16 show modified constructions.
Like letters refer to like parts throughout the several figures.
Referring now to Figures 1 to 8 inclusive, the body A of the pencil is hollow and
may be made of wood or other material preferably. A tip B is removably connected
with the body A, preferably by means of screw-threads. A lead C is contained within
the hollow of the pencil and is provided with two grooves C¹. This lead passes
through the sleeve or nut D and is adapted when in use to project beyond the tip B.
As illustrated in Figure 3, the sleeve or nut D is provided with interior screw-threads
and the lead is of such size that said nut will form screw-threads thereon and thereby
feed the lead forward or backward when the sleeve or nut is rotated. The tip B is
provided with projections B₁ wbich enter the slots in the lead and thereby hold said
lead and prevent it from rotating, but still allow it to move backward and forward.
The tip B is provided with the opening B2 and the end which is connected to the body
of the pencil is enlarged so as to allow the sleeve or nut D to pass there through, said
nut when in position projecting partly through the hole B2 as shown, so that it may be
within reach and easily manipulated. This nut or sleeve is not connected with the
tip except as it is held in place when the parts are in position. When the tip is
loosened from the body of the pencil, it can be moved and leave the parts in the
position shown in Figure 2, the nut or sleeve D being separate therefrom. The
projections B¹ B¹ which hold the lead from rotation are preferably placed in the tip of
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page_text: the pencil. I have shown in Figures 3 and 4 a construction wherein the body A of the
pencil is provided with the projecting pieces or ribs. A¹ which enter the grooves in the
lead and thereby prevent its rotation. It is of course evident that these holding"
devices may be placed at any part of the pencil. The pencil is also provided with an
outer end E which may be of rubber or of other material if desired.
In Figure 6 I have shown a construction wherein the tip B is provided with screw-
threads which form screw-threads on the lead and thereby feed it backward and
forward when said lead is rotated. The sleeve or nut D is provided with the pro-
jections D¹ which enter the grooves C¹ in the lead so that the lead will be rotated by
a rotation of the sleeve or nut.
In Figure 8 I have shown a lead which is screw-threaded substantially throughout
its length before being placed in the pencil. This construction may of course be
used with either of the pencils herein shown or with any other suitable pencil. This
lead is preferably circular in cross section and may be made by forcing the lead
through suitable dies provided with projections which form the grooves C¹. The
leads after being made may be screw-threaded in any suitable manner.
It will be seen that I have here a circular lead which can be held from rotation or
which can be gripped so as to be rotated, the lead having all the advantages that are
possessed by the ordinary circular lead.
In all the devices just described the lead is moved backward and forward by grasp-
ing the nut D between the thumb and finger and rotating the same.
As illustrated in Figures 9 and 10, the holder A is provided with an opening in
which is located the lead C. This holder is screw-threaded and the lead is also pro-
vided with screw-threads. The tip B is provided with an opening B³ through which
the end of the lead projects and is connected with the holder A. Instead of making
the screw-threads directly in the holder, I may insert a tube A³ in said holder, said
tube being provided with internal screw-threads and becoming as it were a part of
the holder. This tube may be split, as shown at A4 Figure 11, so as to allow the lead
to be easily removed if for any reason it should become broken in the hole. In
operating this pencil, the projecting end of the lead is grasped and rotated, the lead
being thereby reciprocated by the engagement of its screw-threaded surface with the
screw-threads in the holder.
In Figure 12, I have shown a construction in which the holder A is provided with
a screw-threaded opening containing the screw-threaded lead C. The lead in this
case is of a form other than circular and the opening B³ in the tip B is made of such
a shape as to grasp the lead and rotate it when the tip is rotated. This tip is loosely
attached to the holder so that it can be rotated and as it engages the lead the lead
will be reciprocated by such rotation.
In Figure 13, the holder A is provided with an opening for the lead screw-
threaded for a portion of its length. A thin case D2 surrounds the holder and is
provided with a tip D³, through which the lead projects. The holder A is provided
with the thumb piece D' and in operating the pencil the operator can grasp and
rotate the tip D3 or the tip extension or case D2 or the thumb piece D. This rota-
tion produces a longitudinal movement of the lead.
In Figure 14, I have shown the holder A as threaded at A5, this threaded end
being split or slotted, as indicated. The lead to be used in this pencil can be circular
or angular and the opening of the tip B round. In this pencil, the tip may engage
the lead or the lead may be grasped at the point and rotated by the fingers, or a
friction washer D5 may be located in the tip, which engages the lead so that it will
be rotated when the tip is rotated. This friction washer is preferably made of flexible
material, such for example as felt or the like. The part A5 is reduced to receive the
tip B, and when the tip is placed in position, the screw-threaded parts on each side
of the slots are forced together, so as to engage the lead. When the tip B is
removed, these parts spring away from each other so that the lead may be easily
removed.
In Figure 15, I have shown the pencil as provided with the washer D³, preferably

page_text: of felt, which surrounds the lead and which may act as a protection to the lead or as
means for holding the lead from rotating with the holder.
In Figure 16, I have shown a rotatable tip B removably attached to the holder.
This tip is rotatably connected with the holder and a suitable holding device is
associated therewith so as to hold the tip in position. As shown in said figure, the
holder is provided with the groove C² and slot C3 and the tip is provided with the
projection C+ In placing the tip in position, the projection C+ passes through
the groove C2 and is then free to work in the slot C³.
Having now particularly described and ascertained the nature of said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The lead pencil herein shown and described.
2. A lead for lead pencils, consisting of a long substantially cylindrical body, said
body provided with one or more grooves which extend substantially along its entire
length, as herein shown and described.
3. A pencil, comprising a lead consisting of a body substantially circular in cross
section and provided with one or more grooves which extend substantially along its
entire length, a casing in which said lead is received, said casing provided with a
projection engaging the groove in said lead, as herein shown.
4. A lead pencil with a removable lead, having a holder provided with a longitudinal
aperture, said aperture screw-threaded a portion of its length and adapted to receive
the lead, and a tip connected with said holder through which the lead normally
projects, as herein shown and described.
5. A lead pencil, consisting of a case having a removable lead, a thumb piece
adapted when rotated to reciprocate said lead, a tip provided with a hole in the end
toward the case, said hole large enough to receive the thumb piece, and with means
for attaching to the case, openings in the sides of the tip through which the thumb
piece can be reached to be operated and a hole in the outer end through which the
lead projects, said lead adapted to be screw-threaded and the thumb piece provided
with an internal screw to receive such thread.
6. A lead pencil, consisting of a holder split or slotted a portion of its length
aud provided with a longitudinal aperture to receive the lead, the aperture through
the split portion of the holder being screw-threaded, a non-screw-threaded tip
engaging the split portion of the holder and provided with an opening through which
the lead normally projects, as shown in Figure 14.
7. A lead pencil, comprising a holder having a longitudinal aperture screw-threaded
for a portion of its length and adapted to receive the lead, a tip removably connected
with said holder and engaging said lead, said tip provided with an extension which
incloses the greater part of the holder, as shown in Figure 13.
8. A lead pencil, consisting of a holder having a longitudinal screw-threaded
aperture adapted to receive the lead, a tip adapted to engage the lead and rotatably
connected with said holder, said tip removably fastened to the holder, as shown in
Figure 16.
9. The lead pencil illustrated in Figures 1 to 8 inclusive.
10. The lead pencil illustrated in Figures 9 to 11 inclusive.