An Electrically Operated Machine or Tool for Cutting Fabrics, Paper, and the like..
Year: 1898

page_text: Date of Application, 11th Jan., 1898-Accepted, 2nd Apr., 1898
COMPLETE SPECIFICATION.
An Electrically Operated Machine or Tool for Cutting Fabrics,
Paper, and the like..
We, FULTON GARDNER and DELBY JOSEPH SMITH, Manufacturers, both of
Garden City Buildings, Chicago, United States of America, 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 :-
Our invention relates to an electric rotary cutter, our object being to provide an
improved form of a cutter operated by electricity and adapted for cutting cloth,
paper and the like.
The cutter of my invention, in its preferred form comprises a base plate upon
which are supported guard plates which extend around the periphery of the cutter
to protect the edges, the cutter being mounted upon the exterior rotating part of.
an electric motor which is supported from above. Means are provided whereby the
motor may be adjusted in position so that as the cutter is worn away by use and
repeated sharpening the motor may be moved to maintain the cutter in the most
effective position for proper operation.'
Referring to the accompanying drawing:
Fig. 1, is a view in elevation of the cutter of our invention.
Fig. 2, is a transverse sectional view thereof.
Fig. 3, is a detail view of the circuit controller.
Fig. 4, is a face view of the motor commutator.
Like letters refer to like parts in the several figures.
Upon the base plate a the edges of which are beveled are mounted the guard
plates bb which extend around the periphery of the cutter c at the rear and
top to protect the edge thereof and prevent the same from coming in contact with
the material being cut. A handle d is secured to the plates b b whereby the cutter
may be moved over the table or surface upon which the material to be cut is
placed. Between the guard plates at the top, a block of metal e is placed and
through this block and the guard plates extends a bolt el. Upon opposite sides of
the guard plates are provided supporting arms f f¹ each provided with a slot f
through which passes the bolt e¹.
The upper ends of the arms ff are joined by a transvere rod f³ carrying a
tapped hole in which fits a screw the pointed end of which rests upon the block e.
By unloosing the bolt el and turning the screw f the arms ff may be adjustably
raised or lowered and by tightening up the bolt again can be clamped in the
adjusted position.
Near the lower end of each of the arms f f a horizontal arm is provided
preferably formed integrally therewith. A vertical slot f³ is provided in the end
of each of the arms and a bolt f passes through the slot and the guard plates
which are separated at this point by a block of metal.
Upon the lower ends of the arms f¹ the shaft g¹ of the motor g is secured. Upon
the shaft is mounted the field magnet h wound with filled coils h¹ h¹ the
conductors h2 hs from which extend to the interior of the shaft and out through
the same.
The shaft is. held stationary. Upon the shaft and rotating about the

page_text: same are discs K' supporting the armature core 2 wound with coils 33 connected
with the commutator bars kk4.
Upon the exterior of the armature is secured a drum or casing land to a flange
upon the periphery of this casing the cutter C is secured. Upon the shaft g¹ a
disc m is secured which fits within the end of the drum casing and carries the
brushes o¹ which are preferably made of carbon and extend through openings in the
disc. Springs 02 03 are secured to the face of the disc and rest upon the ends of
the brushes to hold the same in position and close circuit therethrough. The
springs 02 03 are connected with the opposite circuit wires p¹ to which also the field
coil wires h2 h³ are connected.
The circuit wires p¹ extend to the binding posts provided with springs 2 212
which press against an insulating bar mounted in journals and adapted to
be rotated by a handle 7. Through the bar extend two conducting rods s¹ and
opposite the springs 23 on the other side of the rotatable bar are springs 82 83
connected with binding posts 84 85. These latter binding posts are connected with
a source of current by conductors t¹ suspended from above.
"The parts of the motor are all within the casing and the motor is suspended from
above so that any thickness of material can be cut which can pass between
the base plate and the casing. By means of the bolts and the adjusting
screws the height of the motor inay be readily adjusted to adjust the cutter in
position.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is -
―
1. In a rotary cutter, the combination with a base plate, of a combined standard
and peripheral guard extending around the rear and top edges of the cutter, an
electric motor having an exterior rotating part, a rotary cutter mounted upon the
periphery of said exterior rotating part intermediate between the ends thereof, and
means for supporting said motor from the upper portion of said guard beyond the
ends of said exterior rotating part, substantially as described.
2. In a rotary cutter, the combination with a base plate, of a combined standard
and peripheral guard extending around the rear and top edges of the cutter, an
electric motor having an exterior rotating part, a rotary cutter mounted upon the
periphery of said exterior rotating part, intermediate between the ends thereof,
supporting arms for said motor mounted upon the upper portion of said guard, and
secured to the ends of the motor beyond the ends of said exterior rotating part, and
adjusting means for adjustably securing the motor in any adjusted position
substantially as described.
3. In a rotary cutter, the combination with a base plate, of a pair of combined
standards and peripheral guard plates extending about the rear and upper edges of
the cutter, an electric motor having an exterior rotating part, a rotory cutter
mounted upon the periphery of said exterior rotating part, intermediate between
the ends thereof, the supporting arms upon the lower ends of which the motor is
supported and each comprising a vertical member adjustably secured at the top of
the guard plates and a horizontal member adjustably secured to the guard plates at
the side, the united ends of said arms being secured to the ends of the motor
beyond the ends of said exterior rotating part, substantially as described.
4. In a rotary cutter, the combination with a base plate, of a pair of combined
standards and peripheral guard plates, an electric motor, aud a rotary cutter
mounted upon the exterior rotating part thereof, intermediate between the ends
thereof, the motor supporting arms comprising the vertical and horizontal arms
secured to the ends of the motor beyond the ends of said exterior rotating part,
means for clamping said arms in any adjustable position and an adjusting screw for
raising and lowering the motor, substantially as described.
5. In a rotary cutter, the combination with an electric motor having an exterior
rotating part, of a circular knife or cutter mounted upon the periphery of said

page_text: rotating part and situated substantially midway between the ends thereof, a base
plate, a standard mounted thereon for supporting the motor and provided with an
opening within which the lower portion of the cutter moves, said standard having a
small lateral dimension to permit the passage of the same between the edges of the
material being cut, and a handle pivoted to the machine whereby the end of the
handle may be raised and lowered, substantially as described.
6. In a rotary cutter, the combination with the base plate, of the two part
standard supporting the side plates or bearings, the field magnet mounted upon a
shaft journalled in said side plates, the handle secured to said shaft, the armature
journalled upon said shaft, the shell or drum mounted upon the exterior of said
armature and the circular knife or cutter mounted upon the periphery of said shell
or drum near the middle thereof, substantially as described.
Dated this 10th day of January 1898.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Patent Agents.