Improvements in Machines for Sharpening Knives, Razors, and other Instruments.
Year: 1899

page_text: Date of Application, 29th Aug, 1899-Accepted, 6th Jan., 1900
[Communicated from abroad by THE UNIVERSAL SILARPENING MACHINE Co., of
Fister Building, Chicago, Illinois, United States of America, Manufacturers.]
Improvements in Machines for Sharpening Knives, Razors, and other
Instruments.
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I, JOHN THOMAS KNOWLES, Trade Marks Agent, of the Firm of D. Young & Co.,
of 11 & 12, Southampton Buildings, in the County of London, 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:-
My invention has for its object the production of a sharpening machine for
use in sharpening knives, surgical instruments, razors and other cutlery in
which proper provision is made for the adjustment of the grinding wheels and
for the holding of the knife or other article to be sharpened during the process
of sharpening. It consists of a combination of devices and appliances herein-
after described and claimed.
In the drawings:
Fig. 1, is a front elevation of my machine.
Fig. 2, is an edge elevation thereof.
Fig. 3, is a rear elevation and
Fig. 4. is a detail illustrating the gauge.
In carrying out the invention A represents what may be termed the main
frame of the machine. It is the standard on which the parts are mounted. It
is provided at the lower end with any suitable clamping mechanism whereby
it may be fixed to a table or the like. B-B¹ are arms extending from the main
standard and preferably formed integral therewith. C-C" are the adjustable
arms carrying the emery wheels. They are pivoted at c to the main standard
and curve outward, upward and inward as shown. At the points where they
pass the arms B-B¹, they are slotted as shown at c¹. D are thumb screws
engaged respectively in the arms BB¹ and provided with washers. When the
arms C-Care thrown up to their proper position, the slots c embrace these
thumb screws 1) and are held in any desired position thereby. E are grinding
wheels engaged to axles e which revolve in suitable bearings el on the ends of
the arms C-C. On the opposite end of each axle is a pinion e, the pinion el
meshing directly with the large driving pinion F while the pinion meshes
with another pinion which is mounted in the arm C, and this latter pinion
meshes with the large driving pinion F. The pinion F is mounted on the main
standard A and is provided with a handle F¹, whereby it may be revolved. Thus
a revolution of the large pinion F revolves the grinding wheels E in opposite
directions to each other. Extending from the main standard and preferably
integral therewith, is what may be termed a supporting plate A2 having parallel
projecting ears or flanges a³. G-G₁ are jaws constituting the blade holding
device. The lower end of each is of substantially bell crank form, they being
pivoted in the supporting plate by pivots g. The jaw G has a single projection ƒ

page_text: while the jaw G has a bifurcated projection f¹. The projection f¹ embraces
the pin in the projection f so that a tilting of one jaw will act to correspond-
ingly tilt the other. The spring keeps the two jaws normally together at
their upper ends. These upper ends are flared somewhat as shown at f³ so that
the blade can be readily inserted between them. The upper end of each of the
jaws is provided with an opening or recess 2 in which the grinding wheels can
revolve and this opening forms a depending arm or projection g³ on each jaw
which extends down outside of the grinding wheels so that the blade to be sharpened
has a support on each side of the grinding wheels. H is a gauge and is employed
to set the grinding wheels in the desired position. It is of substantially tri-
angular shape, one corner being provided with a pin H' while the other two
corners are provided with orifices h. To use the gauge the operator inserts the
pin H between the jaws and brings the orifices h down to and over the pins
on the face of the supporting plate A2. He then loosens the thumb screws D
and brings the grinding wheels against the pin H. He then tightens the thumb
screws thus locking the arms C-C in place and removes the gauge. He can
either remove the gauge altogether from the machine or he can reverse its
position and allow the end carrying the pin H¹ to depend.
It will be seen that by the above construction, I have provided a sharpening
machine wherein the sharpening wheels can be easily adjusted to the desired
position and also one wherein the blade to be sharpened is firmly held in position
during the sharpening process.
Having now particularly described and ascertained the nature of this 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:
ing
1. In a sharpening machine, the combination of grinding wheels and a hold-
device consisting of spring actuated pivoted jaws, substantially as described.
blade consisting of spring actuated pivoted jaws, of a pair of grinding wheels
mounted one on each side of said blade holding device and pivoted supports
carrying said grinding wheels whereby the angular distance between the grinding
wheels may be varied, substantially as described.
3. In a sharpening machine, the combination with the grinding wheels and
adjustable supports for the same, of a blade holding device, consisting of a pair
of jaws having an opening or recess in which the grinding wheels revolve and
depending arms outside said grinding wheels, substantially as described.
4. In a sharpening machine, the combination with the grinding wheels and
adjustable supports for the same, of a blade holding device, consisting of a pair
of spring actuated metal jaws having an opening or recess in which the grinding
wheels revolve and depending arms outside said grinding wheels, substantially
as described.
5. In a sharpening machine, the combination with the base or support of
supports adjustably secured to said base, a pair of grinding wheels, each of said
grinding wheels mounted on one of said adjustable supports, a supporting plate
fixed with respect to said base and located between said adjustable supports and
spring actuated jaws adapted to hold the blade in position and mounted upon
said supporting plate, substantially as described.
6. In a sharpening machine, the combination with a base, of arms adjustably
secured thereto, means for securing said arms in different angular positions.
shafts journaled in extensions of said arms, wheels mounted fast on said shafts,
upright pivoted jaws mounted between said wheels and adapted to hold the
blade of the instrument to be ground in a vertical plane, substantially as described.
7. In a sharpening machine, the combination with the base or support, of
arms adjustably secured thereto, means for securing said arms in different angular
positions, shafts journaled in extensions of said arms, wheels mounted fast on said
shafts, upright pivoted jaws mounted between said wheels and adapted to hold

page_text: the blade to be ground in a vertical plane and means for rotating said shafts at
the same rate of speed, substantially as described.
8. In a sharpening machine the combination with a base, of a pair of arms
pivoted thereto; means for securing the said arms in different positions; shafts
journaled in extensions of said arms; a grinding wheel mounted fast on each
of said shafts spring actuated upright pivoted jaws mounted between the said
wheels and adapted to hold the blade of the instrument to be ground in a
vertical plane, substantially as described.
9. In a sharpening machine, the combination with the base or support of
arms adjustably secured thereto, shafts journaled in said arms, grinding wheels
mounted on said shafts each shaft provided with a pinion, a driving gear mounted
on the base or support, the pinion on each shaft meshing directly with said
driving gear and the pinion on the other shaft meshing with an auxiliary pinion
which meshes with the driving gear and a blade holding device consisting of
pivoted jaws for holding the blade in a vertical plane while being ground, sub-
stantially as described.
10. In a sharpening machine, the combination with a base or support of arms
pivoted thereto, a grinding wheel mounted in each of said arms, engaging pins
located below said grinding wheels and a gauge provided with a pin adapted
for insertion between said grinding wheels, said gauge adapted also for engage-
ment with said pins, substantially as described.
11. In a sharpening machine, the combination with the device for holding
a blade consisting of a pair of spring actuated pivoted jaws, of a pair of grind-
ing wheels mounted one on each side of said blade holding device, pivoted
supports carrying said grinding wheels whereby the angular distance between
the grinding wheels may be varied and a gauge for regulating said distance
consisting of a plate of substantially triangular shape, one corner provided with
a pin adapted for insertion between the pivoted jaws and between the grinding
wheels, the other two corners adapted for engagement with fixed points on the.
supporting plate, substantially as described.
000
1
11000
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
D