Year: 1892

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ate of Application (in United Kingdom), 8th Nov., 1892
Complete Specification Left. 8th Nov., 1892-Accepted, 17th Dec., 1892
Fig. 5, a front view of the cutter, and
Fig. 6 a detail showing a preferred method of attaching the cutter to this shaft..
A, is the casing of the machine, and a an angle-arm adapted to take around the
edge of a table or equivalent support, and a¹ a clamping-screw adapted to lock the
frame to the support.
B is a frame journalled in suitable bearings in the casing A. In the form shown,
one of the bearings C is tubular and serves as a pencil holder and guard, while
the other end is provided with an ordinary journal D, adapted to be rotated by a
crank d or equivalent means.
Mounted in suitable bearings upon the frame B is a shaft b, carrying a cutter E
and provided with a gear-wheel b', adapted to mesh with another gear-wheel b²,
also mounted upon frame B, which in turn meshes with an annular rack a², fixed to
the frame or casing of the machine. Shaft b is preferably inclined relatively to
the axis of the rotary frame.
The cutter E consists of a hub e, carrying a series of radially-extending blades e¹,
and it may be secured to the shaft in any suitable manner. In the form shown,
the shaft is provided with a fixed collar 63, having a threaded projection 64,
adapted to receive a clamping-nut 6, and the cutter is clamped between the collar
and the nut. The tubular bearing C has an inward projection c, having a conical
internal taper and provided with a longitudinal slot c', the edges of which are
inclined to correspond with the bevel to be applied to the end of the pencil. It
will be seen that operation of the crank will cause rotation of the frame B and
pencil-guard C, and will at the same time impart a travelling rotation to the shaft b
and cutter E. The cutter is so placed that its blades in their rotation will travel
along and in close contact with the edges of the slot c. The pencil is inserted in
the guard C and held against rotation therein. The crank is then actuated and
гр.

page_text: the slight portion of the pencil projecting above the slot edges removed by the
travelling blades, the parts of the pencil not immediately exposed to the cutting
action being positively supported and thereby protected against fracture. The
pencil is advanced as the cutting proceede until it receives as fine a point as may
be desired.
F is a drawer adapted to receive the cuttings.
I have illustrated the cutter as provided with knife-blades; but it is obvious
that an abrading-disk may be used in its place, and in the claims I employ the
term "cutter as denoting the reducing agent, whether the work he performed
by the cutting or abrading.
"
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. The combination, in a sharpening device, of a rotatable frame, a cutter
carried by the frame, and mechanism for imparting a rotary movement to the
cutter, substantially as and for the purpose specified.
2. The combination, in a sharpening device, of a rotatable frame, a cutter
carried by the frame, mechanism for imparting a rotary movement to the cutter,
and a guard for the object to be sharpened, adapted to rotate with the frame,
substantially as and for the purpose specified.
3. The combination, in a sharpening device, of a rotatable frame, a cutter
carried by the frame, mechanism for imparting a rotary movement to the cutter,
and a slotted guard for the object to be sharpened, adapted to rotate with the
frame, substantially as and for the purpose specified.
4. The combination, in a sharpening device, of a rotatable frame, a cutter
carried thereby, mechanism for imparting a rotary movement to the cutter, and a
guard for the object to be sharpened, the guard having a conical internal taper
and a longitudinal slot, substantially as and for the purpose specified.
5. The combination, in a sharpening device, of a rotatable frame, a shaft
carried thereby, a cutter carried by the shaft, an annular rack upon the casing,
and gearing connecting the cutter-shaft with the annular rack, substantially as and
for the purpose specified.
6. The combination, in a sharpening device, of the frame B, the shaft b, the
cutter E, mounted upon said shaft, the gear-wheels and 62, and the rack a²,
substantially as and for the purpose specified.
7. The combination, in a sharpening device, of the frame B, the shaft b, the
cutter E, mounted upon said shaft, the gear-wheels 61 and 62, the rack a², and the
guard C, having slot c', substantially as and for the purpose specified.
Dated this 27th day of October 1892:
FRANK BRYANT FRENCH.
Wm. P. Thompson & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.