Year: 1886

page_text: We RICHARD KAMPFE, FREDERICK KAMPFE, and OTTO KAMPFE all of 166 Snydam
Street in the City of Brooklyn, County of Kings and State of New York United
States of America Machinists; do hereby declare the nature of this invention to
be as follows:-
This Invention relates to the construction of machinery designed for grinding
cutlery, and more especially applicable for the grinding of razor-blades; and the
Invention consists in part of an improved device for holding the blade to the
grindstone, and in part of a device adapted to impart a peculiar and desired
motion to the blade while being ground, and of a mechanism for automatically
controlling said motion; the particular object of the Invention being to provide
for the grinding of fine cutlery, and particularly for the grinding of razor blades,
without the employment of skilled labor.
t
Reference is to be bad to the accompanying drawing forming a part of this
specification.
In the construction illustrated in the drawing above referred to A represents the
grindstone or emery wheel mounted upon the shaft C which is centred between
standards C C D is an oscillating frame carrying two standards H H which
are provided with pointed set screws ii upon which the bed I with its super-
incumbent slide rest is pivoted. J is a drip-pan whose office is to catch the waste
from the stone; K is a screen to prevent the water, débris, etc, from being thrown
upon surrounding objects. L is a screw to throw the blade-holding and feeding
parts of the machinery back or forward by raising or lowering the far end of the
bed I. This screw may screw through the bed I, and bear against the top of the
frame D; or it may screw through the frame and bear against the lower side of
the bed. M. is the stationary portion, and M³ the movable portion, of the lateral
slide, and their office is, by the aid of the screw m, and a suitable pinion, to feed
the blade across the face of the stone. The screw is operated by the hand-
wheel m¹. Usually this lateral slide will not be employed, and the feeding of the
blade to and fro across the face of the stone will be done automatically by the
operation of the oscillating frame, hereinafter explained; but there are times when
it is desirable to hold the blade in one place, or to present one portion longer than
the rest, and for this purpose the hand-feed is particularly adapted.
571

page_text: N is the stationary, and N the movable portion of the forward slide. The office
of this slide is to feed the blade against the stone. The slide is operated by the
hand wheel n' and the screw n which engages a suitable pinion. P is the improved
blade-holder which is essentially a horse-shoe magnet. The end of it is rounded
to conform to the shape of a hollow ground razor. It should be of a thickness
equal to the width of the blade. If need be, several magnets may be placed upon
each other to make up the desired thickness in this case, a sheet of glass, or other
non-conductor will be placed between them. It is found desirable also to fill the
centre P between the arms with a non-conductor. The magnet is secured by the
bolts gq on to a bed P¹ from which it is separated by a thickness of non con-
ducting material p¹. The bed P¹ is hung upon an axle n' carried by the slide N¹.
O is a covering of non-conducting material which is placed upon the magnet. The
bolts qq pass through this and secure it in position This covering is provided
with the elevated portions o o¹ which are drilled to admit the facing tool R. By
a proper adjustment of the relative heights of the openings in o and o¹ the facing
tool is given the desired angle. The facing tool consists of a diamond set in the
end of a rod. Q is a shield to protect the slides etc; and the person operating the
machine from the water and debris which is thrown off from the grindstone when
in motion. It is provided with an opening to permit the blade to be ground to be
inserted against the ends of the magnetic holder P. The blade S is held firmly in
position, and the hands are relieved from the duty of holding the blade. Increased
attraction between the holder and the blade may be secured by the employment of
an electro-magnet of a suitable shape. Q³ is a small plate which is screwed on to
the face of the shield Q and serves to enclose and support the blade when placed
against the ends of the magnetic blade holder. E is a shaft having bearings in
either side of the slide N¹ and carries an eccentric e and is connected by universal
joints and a telescopic shaft with the shaft upon which is mounted the driving
pulley.
The oscillating frame D is provided with an arm d having two slots & d³ and it
is pivoted to a table or bench by a stud a carrying nuts to t³ and playing within
the slot d and serving as a guide for the frame D in its upward motion. A
shaft S¹ is mounted in bearings in the supporting framework of the table, and
carries a crank disc S2 whose crank pin s plays in the slot d², and imparts an
Oscillating motion to the frame D. The plate Q is formed with upwardly
"safety
extending arms, and is adapted to hold that class of razors known as
razors," but if razors having shanks were to be ground the upwardly extending
arms could be cut away so as to permit the blade of the razor to be placed directly
against the ends of the magnet..
The improved grinding machinery is operated as follows-The shaft C and
its corresponding driving shaft are so arranged that the stone A is made to revolve
towards the blade to be ground. The object and advantage of this is; that the
force of the stone is exerted to press the blade downward and against its
holder whereas, if the motion were in the contrary direction the tendency
would be to drag the blade upwards and away from its holder. The shaft E
carrying the eccentric e may revolve in either direction The office of the
eccentric is to alternately raise and lower the bed P¹ and with it the blade
holder P. The objects and advantages of giving this up and down motion
to the blade are;--that the debris from the stone is allowed to be washed out of
the way more freely than would be the case if the blade were held steady.
Secondly, this motion frees the stone from many particles of sand which when
detached fall between the blade and stone, and serve to increase the cutting quality
of the stone; and at the same time the tendency of the blade to burn, and the
stone to become polished at the point of contact, is avoided. Again, if the blade
is held still the stone will grind it hollow making it thin in the centre and thick
at the front and back edges. Even in hollow ground blades it is desirable to have
the blade flat towards the front edge, and this is accomplished by a careful adjust-

page_text: ment of the blade and stone with reference to their median lines, that is to say,
the higher the blade is raised with reference to the median line of the stone, the
more the back of the blade is ground off and vice-versa. The adjustment is effected
by raising or lowering the screw L as may be desired. Lastly, by this motion all
the advantages are secured which trained grinders have found in keeping the blade
in motion when presented to the stone. The universal joints and telescopic
shafting adjust themselves automatically to the changed positions of the slide N
within which the shaft E has its bearing which result from the operation of the
hand-screws m and n and the oscillating frame D and set screw L The respective
male and female portions of the telescopic shaft are respectively provided with a
feather and groove, or equivalent device. When the shaft S¹ is set in motion the
crank dise Š carries the lower end of the arm d with it from side to side
alternately. This is permitted by the playing of the slot d around the stud 8. and
the head of the frame with its superincumbent bed, slides, blade-holder, blade, etc,
is thereby swung from side to side and the line of motion described by the blade
while being so carried is a segment of a circle, and the stone being in motion, and
the operation of grinding going on the cutting edge is made circular. This does
not at all interfere with the operation of grinding the blade concave which is going
on at the same time. The distance from the stud 8 to the middle line of the blade
is the measure of the radius of the circle described by the blade during the
oscillation of the frape D and this may be regulated by setting the stud & up or
down. The frame is not raised or lowered by setting the stud. As the distance
between the stud and blade is increased or diminished, so will the cutting edge
approach or recede from a straight line If it is desired to give the blade a straight
edge the pulley S' is disconnected from the driving shaft and the blade is fed
across the face of the stone by the operation of the slide M. Mr.
.
The ends of the blade holder are provided with a series of perpendicular grooves
The object of these is to afford an avenue of escape for the water and sand which
might otherwise lodge between the blade and holder and interfere with the
attraction between the same Another advantage is that the circulation of the
water back of the blade tends to keep it cool.
1
Th 1
1000

page_text: We, RICHARD KAMPFE, FREDERICK KAMPFE and OTTO KAMPFE all of 166 Snydam
Street in the City of Brooklyn County of Kings and State of New York, United
States of America Machinists: 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 the construction of machinery designed for grinding
cutlery and more especially applicable for the grinding of razor-blades; and the
Invention consists in part of an improved device for holding the blade to the grind-
stone and in part of a device adapted to impart a peculiar and desired motion to
the blade while being ground and of a mechanism for automatically controlling
said motion; the particular object of the Invention being to provide for the
grinding of fine cutlery and particularly for the grinding of razor-blades without
the employment of skilled labor.
Reference is to be had to the accompanying drawings forming part of this speci-
fication; in which similar letters of reference indicate corresponding parts in all the
Figures.
Figure 1 is an end view of such parts of the improved grinding machine as are
arranged above the supporting bench or table certain portions of the device as
shown being represented in section. Figure 2. is a plan view of the machine, the
magnet covering and the shield being however removed. Figure 3 is a side eleva-
tion of the machine with the shield removed. Figure 4 is a front view. Figure
is a front view of the shield employed to catch the water and debris thrown
forward from the grind stone, this view also shows the blade which is screwed on
to the face of the shield about the aperture through which the magnet extends.
Figure 6 is a detail view illustrating the construction of the ends of the magnet
employed to hold the blade.
In the construction illustrated in the drawings above referred to, A represents
the grind stone or emery-wheel mounted upon the shaft C which turns on centres c c
in blocks secured by set screws c¹ c¹ in standards C₁ C. D is an oscillating
frame carrying two standards H H which are provided with pointed set screws i i
upon which the bed I with its superincumbent slide rest is pivoted. J is a drip-
pan whose office is to catch the waste from the stone. K is a screen to prevent the
water, debris, etc from being thrown upon surrounding objects. L is a screw to
throw the blade-holding and feeding parts of the machinery back or forward by
raising or lowering the far end of the bed I. This screw may screw through the
bed I and bear against the top of the frame D or it may screw through the frame
and bear against the lower side of the bed. M is the stationary portion and M¹
the movable portion of the lateral slide and their office is by the aid of the screw m
and a suitable pinion to feed the blade across the face of the stone. The screw is
operated by the hand-wheel m¹. Usually this lateral slide will not be employed
and the feeding of the blade to and fro across the face of the stone will be done
automatically by the operation of the oscillating frame hereinafter explained but
there are times when it is desirable to hold the blade in one place or to present one

page_text: portion longer than the rest and for this purpose the band-feed is particularly
adapted. N is the stationary, and N¹ the movable portion of the forward slide.
The office of this slide is to feed the blade against the stone. The slide is operated
by the hand wheel n¹ and the screw n which engages a suitable pinion. P is the
improved blade holder which is essentially a horse-shoe magnet. The end of it is
rounded to conform to the shape of a hollow ground razor. It should be of a thick-
ness equal to the width of the blade. If need be, several magnets may be placed
upon each other to, make up the desired thickness, in this case a sheet of glass or
other non-conductor will be placed between them. It is found desirable also to fill
the centre p between the arms with a non conductor. The magnet is secured by
the bolts gq on to a bed P¹ from which it is separated by a thickness of non-
conducting material p¹. The bed P¹ is hung upon an axle n³ carried by the slide N¹.
O is a covering of non-conducting material which is placed upon the magnet. The
bolts gq pass through this and secure it in position. This covering is provided.
with the elevated portions o of which are drilled to admit the facing tool R. By a
proper adjustment of the relative heights of the openings in o and o¹ the facing
tool is given the desired angle. The facing tool consists of a diamond set in the
end of a rod. Qis a shield to protect the slides etc; and the person operating the
machine from the water and débris which is thrown off from the grindstone when
in motion. It is provided with the opening Q¹ (figure 5) to permit the blade to be
ground to be inserted against the ends of the magnetic holder P. The blade S not
being magnetised is held firmly in position and the hands are relieved from the duty
of holding the blade. Increased attraction between the holder and the blade may
be secured by the employment of an electro-magnet of a suitable shape. Q³ is a
small plate which is screwed on to the face of the shield Q and serves to enclose
and support the blade when placed against the ends of the magnetic blade-holder.
E is a shaft having bearings in either side of the slide N¹ which carries an eccen-
trice and is connected by a universal joint e¹ to the telescopic shaft E¹ E' which in
turn is connected by the universal joint e³ with the shaft E upon which is mounted
the pulley e³. F is a standard terminating in the bearings ff which serve as a
support for the shaft E. The oscillating frame D is provided with an arm d
having two slots d d and it is pivoted to a table or bench by a stud a carrying
nuts and playing within the alot d¹ and serving as a guide for the frame D in
its upward motion. A shaft S¹ is mounted in bearings in the supporting frame
work of the table and carries a crank disc S' whose crank pin 81 plays in the slot d*
and imparts an oscillating motion to the frame D. The plate Q' is shown as
formed with upwardly extending arms and is adapted to hold that class of razors
known as "safety razors but if razors having shanks were to be ground the
upwardly extending arms could be cut away so as to permit the blade of the razor
to be placed directly against the ends of the magnet.
"
The improved grinding machinery is operated as follows:-The shaft C and its
corresponding driving shaft are so arranged that the stone A is made to revolve
towards the blade to be ground. The object and advantage of this is;-that the
force of the stone is exerted to press the blade downwards and against its holder
whereas if the motion were in the contrary direction the tendency would be to drag
the blade upwards and away from its holder. The shaft E carrying the eccentric e
may revolve in either direction. The office of the eccentric is to alternately raise
and lower the bed P¹ and with it the blade holder P. The objects and advantages
of giving this up and down motion to the blade are-that the débris from the
stone is allowed to be washed out of the way more freely than would be the case if
the blade were held steady. Secondly, this motion frees the stone from many
particles of sand which when detached fall between the blade and stone and serve
to increase the cutting quality of the stone, and at the same time the tendency of
the blade to burn and the stone to become polished at the point of contact is
avoided. Again, if the blade is held still the stone will grind it hollow making it
thin in the centre and thick at the front and back edges. Even in hollow ground
blades it is desirable to have the blade flat towards the front edge and this is

page_text: accomplished by a careful adjustment of the blade and stone with reference to their
median lines that is to say, the higher the blade is raised with reference to the
median line of the stone the more the back of the blade is ground off and vice-
versa. The adjustment is effected by raising or lowering the screw Las may be
desired Lastly, by this motion all the advantages are secured which trained
grinders have found in keeping the blade in motion when presented to the stone.
The universal joints e¹e and telescopic shafting E¹ E¹ adjust themselves auto-
matically to the changed positions of the slide N within which.the shaft E has its
bearing which result from the operation of the hand-screws m and n and the
Oscillating frame D and set-screw L. The respective male and female portions of
the telescopic shaft E¹ E¹ are respectively provided with a feather and groove or
equivalent device to cause them to turn together. When the shaft S¹ is set in
motion the crank disc S* carries the lower end of the arm d with it from side to
side alternately. This is permitted by the playing of the slot d' around the stud 8,
and the head of the frame with its superincumbent bed, slides, blade holder,
blade, etc is thereby swung from side to side and the line of motion described by
the blade while being so carried is a segment of a circle and the stone being in
motion and the operation of grinding going on the cutting edge is made circular,
and this does not at all interfere with the operation of grinding the blade concave
going on at the same time. The distance from the stud s to the middle line of the
blade is the measure of the radius of the circle described by the blade during the
oscillation of the frame D, and this may be regulated by setting the stud s up or
down. The frame is not raised or lowered by setting the stud. As the distance
between the stud and blade is increased or diminished so will the cutting edge
approach or recede from a straight line. If it is desired to give the blade a straight
edge, the pulley S3 is disconnected from the driving shaft and the blade is fed across
the face of the stone by the operation of the slide M. M¹. The ends of the blade
holder are provided with a series of perpendicular grooves. The object of these is
to afford an avenue of escape for the water and sand which might otherwise lodge
between the blade and holder and interfere with the attraction between the same.
Another advantage is that the circulation of the water back of the blade tends
to keep it cool.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is
1. A device for grinding razor and other blades, consisting of a combination of
lateral and forward slides, adapted to feed the blade to be ground against the face
of the stone and to move the same to and fro across the face of the stone.
2. A device for automatically keeping the blade in motion while being presented
to the grindstone, consisting of a shaft provided with an eccentric, said eccentric
bearing against the under side of the blade holder or the surface upon which
it rests.
3. A device for holding the blade while the same is being presented to the grind-
stone consisting of a magnet or electro-magnet, adapted to hold the blade by mag-
netic or electro-magnetic attraction during the process of grinding.
4. A device for automatically moving the blade across the face of the stone, con-
sisting of a frame carrying the blade and its holder, said frame being operated by a
crank connected to its lower end, and being graded in its motion by a stud
operating within two slots, one within the pendant portion of the frame, and the
other within the table or other object from which the frame is supported.
5. A device for raising or lowering the blade when in position before the grind-
stone, consisting of a screw operating between the part supporting the blade holder
and the basis upon which said part rests, by screwing through the one and bearing
against the other.
6. A shield adapted to protect the grinder and the machinery for moving the
blade, consisting of a sheet of metal or other material provided with an opening to

page_text: permit the placing of the blade against its holder; said shield having secured upon
its face a piece forming a ledge to support the blade.
7. A combination of automatically self-adjusting shafting, consisting of a non-
adjustable shaft, mounted upon suitable fixed bearings, and at one end terminating
in, and connected by a universal joint to a length of telescopic shafting, the male
and female portions of which are connected by means of a feather and groove or
equivalent device, said telescopic shafting being connected at its opposite end by a
universal joint to another shaft having fixed bearings.
8. The lateral slide M. M³, the forward slide N N³, carrying the blade holder P,
in combination with the grindstone A, substantially as, and for the purpose set
forth.
9. The shaft E having the eccentrics e in combination with non-conductor p,
and blade-holder P, substantially as and for the purpose set forth.
10. The magnetic blade-holder P in combination with the grindstone A, sub-
stantially as and for the purpose set forth.
11. The frame D having the pendant portion d provided with the slots d¹ d'in
combination with the bench S having the studs and carrying the shaft S¹ upon
which is mounted the pulley S³, disc S provided with the crankpin 8 and the
supports H H, all combined, substantially as and for the purpose set forth.
12. The screw L in combination with the bed I, and frame D, substantially as
and for the purpose set forth.
13. The shield Q having the opening Q¹ and plate Q and blade holder P all
combined, substantially as and for the purpose set forth.
14. The shaft E, having the bearings N' N, the universal joint e¹, the telescopic
shaft E E¹, the universal joint e and the shaft E' all combined substantially as
and for the purpose set forth.
15. The covering O having the elevated portions o¹ o¹ and the portion of provided
with the set screw o' in combination with the facing tool R, and grindstone A
substantially as and for the purpose set forth.