Year: 1887

page_text: Date of Application, 25th May, 1887
Specification Accepted, 28th June, 1887.
[Communicated from abroad by ERNST LUDWIG CARL SCHULZ, of 80, Washington
Square East, New York, in the County and State of New York, United States
of America.]
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, 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 :-
Reference is to be had to the accompanying drawing, in which figure 1 is a vertical
sectional elevation of the improved skin shaving machine taken on the line c, c
Figure 2. Figure 2 is a plan view of the machine, part being broken away.
Figure 3 is a view of the driving gear for adjusting the grinding disc longitudinally.
Figure 4 is a view of the gears for adjusting the grinding disc, taken on the line k, k
figure 2. Figure 5 is a face view of the cutter cylinder and figure 6 is an end view
of the same. A, is the frame of the improved shaving machine. At one end of the
frame in the upper part, is journaled the cutter cylinder B provided on its external
periphery with sets C of knives. Each set of knives is arranged in angular rows, as
shewn, those of each row breaking joints with those of the next row-that is to say-
each knife of any row is to extend across the joint or space between two knives of the
next preceding row. Each knife is a thin blade or plate of metal, bent at a right
angle and fastened to the cylinder. In this case, each knife is elastic, and can bend a
little under the pressure of the grinding wheel. The knives by being elastic
adapt themselves to the skin and operate better and surer than rigid spiral
knives and therefore these elastic knives constitute an important feature of the
machine.
At the rear of the cutter cylinder B, is a roller E, journaled in the upper part of the
lever F arranged in and fulcrumed to the frame A. The lower arm of this lever rests

page_text: against a cam g on the end of the foot lever or pedal G. By pressing down the
lever G, the roller E will be pressed against the cutter cylinder B, the return movement
of lever G and roller E being caused by their own weight. In front of the cutter
cylinder B is journaled, in movable boxes i sliding on the frame A, the shaft I.
Mounted upon shaft I is the grinding disc or roller H. A slot is formed in the
shaft I which receives a pin projecting from the inner face of the grinding disc or its
hub, to allow said disc to have a lateral motion on the shaft I but still to be revolved
by and with said shaft. The movable boxes i are provided on the upper surface with
projections 1 in which work the rods J having screw threads m cut upon one end.
Upon the opposite ends of said rods J are attached the gear wheels K which mesh with
worms on the shaft L, this shaft L is provided on one end with the crank M for
revolving it.
It will thus be seen that by revolving the crank M, rods J gearing with same will
be revolved thereby moving the grinding disc H towards or away from the cutter
cylinder B, as desired. The lateral movement of the disc H along the face of the
cutter cylinder is accomplished in the following manner; Mounted upon the shaft L,
is a sliding block N to which is attached the arm n, the free end of this arm n
embraces the hub of the grinding disc, and is kept there-on or against the disc H in
any suitable manner, but so that the hub or disc may be revolved freely therein. To
the upper part of the sliding block N is pivoted the connecting rod O to the other end
of which is pivoted the arm p on the upper end of the vertical shaft P suitably
journaled in the frame A. The shaft P is revolved by means of the spur wheel
attached thereto, which meshes with worm Q on the shaft journaled in the frame A.
The shaft r is revolved by means of the pulley R over which a belt t passes; this belt
being actuated by means of the pulleys on the main driving shaft S journaled in the
frame A. The shaft S is revolved by means of the fast and loose pulleys T U and
belt u driven by any suitable force, but the means for revolving shafts and S may be
varied if desired. Upon the outer ends of the shaft S are attached the pulleys V, W,
over which pass endless belts vw which extend around the guide pulleys a journaled in
the frame A and also over the pulleys j j d d on the shafts I and c of the grinding disc
and cutter cylinder respectively.
arm p.
It will be seen from this, that the revolution of the shaft P will give to the sliding
block N a reciprocating motion on shaft L by means of the connecting rod O and
This reciprocating motion of the sliding block N is transmitted to the grinding
disc H by the connecting arm n. The grinding disc revolving in the opposite direction
to the cutter cylinder will grind and clean the knives on the same, the amount to
which the knives are ground being regulated by means of the crank M and shaft L
and connected gearing. An adjustable cover f is placed over the cutter cylinder and
grinding disc, to keep the chips from being scattered around. The skin to be
shaved is placed on the roller E, the roller E being pressed against the cutter
cylinder to any desired degree and the latter being revolved will immediately
shave the skin and the chips falling below, can be carried off in any convenient
manner.
Having now particularly described and ascertained the nature of the said Invention
and in what manner the same is to be performed, I declare that what I claim is;
1. In a skin shaving machine, a cutter cylinder having sets of knives arranged
obliquely thereon, substantially as described.
2. In a skin shaving machine, a cutter cylinder having flexible knives arranged
obliquely thereon, so as to break joints with each other, substantially as described.
3. In a skin shaving machine, a cutter cylinder having obliquely set knives, in
combination with a roller for holding the skin to be shaved, against the cutter,
substantially as described.
4. In a skin shaving machine, a cylinder carrying knives on its periphery and a roller
for holding a skin against the cutter cylinder, in combination with a grinding disc,
substantially as described.

page_text: 5. In a skin shaving machine, a cylinder carrying knives and a roller for holding a
skin against the cutter cylinder, in combination with a grinding disc having rotary and
laterally reciprocating motion and means for adjusting said disc with reference to the
cutter cylinder, substantially as described.
6. In a skin shaving machine, a cutter cylinder in combination with a grinding disc
having a rotary and laterally reciprocating motion and means for adjusting said disc
with reference to the cutter cylinder, substantially as described.
7. In a skin shaving machine, the grinding disc H in combination with sliding
block N arm n and means for reciprocating said block laterally, substantially as
described.
8. In a skin shaving machine, the cutter cylinder B, grinding disc H, arm n, sliding
block N, and means for reciprocating said block and disc laterally, in combination with
means for adjusting said grinding disc, with reference to the cutter cylinder, substantially
as described.
9. In a skin shaving machine, the grinding disc H, arm n, sliding block N,
connecting rod O arm p on shaft P having gear wheel 9 driven by worm
on the shaft for imparting to the grinding disc a laterally reciprocating motion
in combination with shaft L, crank M, worm gearing with worm K on the shaft J
having screw threads m gearing into movable boxes i for giving to the disc a longitudinal
motion, substantially as described.
10. The machine substantially as described, consisting of the cutter cylinder B
having a series of knives, the presser roller E, the grinding disc H arranged
and provided with mechanism substantially as described, for operating such cylinder,
roller, and grinding disc, substantially as set forth.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.