Improvements in Pencil Grinders or Sharpeners.
Year: 1891

page_text: Date of Application, 9th Oct., 1891-Accepted, 14th Nov., 1891
COMPLETE SPECIFICATION.
Improvements in Pencil Grinders or Sharpeners.
A communication by AUGUST OTTO SANNENBERG, of 503, Camp Street, New
Orleans, in the County of Orleans and State of Louisiana, United States of
America, Locksmith and Bell Hanger, and WILLIAM HENRY BOFINGER, of
132, Gravier Street, New Orleans, aforesaid, Gentleman.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.1.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil 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 an improvement in a diamond grooved pencil grinder,
and its novelty will be fully understood from the following description and claims,
when taken in connection with the annexed drawings; and the objects of the
invention are to enable a slate or lead pencil to be sharpened in a summary
manner.
"These objects are attained by the mechanism illustrated in the accompanying
drawings, in which-
Figure 1 is a side view of a slate pencil grinder, showing set screw in position
when attached to a table, desk or slate.
Figure 2 is a side view of slate pencil grinder, showing set screw when detached
from table.
Figure 3 is a side view of lead pencil grinder or sharpener.
Figure 4 is a front view showing slate pencil grinder and lead pencil grinder or
sharpener when placed on a single shaft.
Figure 5 is a front view of slate pencil grinder.
Fi
Tigure
6 is a front view of lead pencil grinder or sharpener.
Figure 7 is a side view of slate pencil.
Figure 8 is a side view of lead pencil.
Similar letters refer to similar parts throughout the several views.
In the drawings-
A, refers to a drum, in which there is placed a wheel B, as shown in Figures 1,
2 and 5, said wheel being mounted on a shaft, the latter having a crank for
rotating wheel, as shown by C¹, said crank forming a part of said shaft, dotted
lines as shown by D in Figure 2 showing position of cover, which is secured by
means of hinge E; attached to bottom of drum is a screw F, which has a plate
which forms part of said screw, and is designated G, said screw F passes through
an eye of clamp H, and H' designating lower portion or arm of clamp. K showing
edge of table, desk, or slate, when set screw and clamp is in position. The
construction of wheel as shown in Figure 5 is such as is used when grinding or
sharpening a slate pencil; the grooved face of said wheel may be covered with
emery, or, where preferred, metal with a rough or file finished surface may be used.
The construction of wheel B' shown in Figure 6 is used for grinding or sharpening
a lead pencil, and is preferably of pressed steel, having on its face blades as shown
by L, or a grating surface formed by perforating the metal, as shown by M.
Where desired, wheels B and B¹ may be mounted on a single shaft, as shown
in Figure 4, and attached to a table, desk or slate, as shown in said figure.
N designates a slate pencil, and O a lead pencil.
In practice, the invention may be attached to a desk, table, or slate, by means
of set screw F, and by simply rotating the drum A with the hand, where both
wheels are placed in a single drum, as shown in Figure 4, the end of pencils are

page_text: placed in the grooves of wheels with one hand and a rotary movement given the
wheels by means of crank C', thus end of slate pencil N is placed in grooved face
of wheel B, while end of lead pencil O is placed in grooved face of wheel B'.
The construction shown in Figure 4 is double acting, having a sharpening device
for both slate and lead pencils in one device, while Figures 5 and 6 show
construction of sharpener grinder for slate and lead pencils when used singly.
Where desired two or more wheels may be placed in one drum, one cover being
used to cover the drum.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is :-
1. The herein described pencil grinder or sharpener, having one or more emery
or file face grooved wheels placed within a drum, journalled upon a shaft, one end
of which forms a crank for rotating said wheel or wheels, a set screw attached to
bottom of drum, with plate thereon, said set screw passing through eye of one of
clamp arms, as set forth.
2. The herein described pencil grinder or sharpener, having one or more grooved
face wheels placed within a drum, the face of said wheels having blades and graters
perforated therein, as set forth.
WM. P. THOMPSON & Co.,
Agents for the Applicant.