US561312A

US561312A - atltlinq

Info

Publication number: US561312A
Authority: US
Publication date: 1896-06-02
Anticipated expiration: 1913-06-02

Description

(No Model.) a Shets-Sheet U; "GUTLING.

CUTTING DEVICE-FOR SEWING MACHINES. No. 661,312. Patented June 2,1896.

f I N T (No Model.) 3 SheetsS11eet 2 U. GUTLING. CUTTING DEVICE FOR SEWING MACHINES.

No. 561,312. Patented June- 2, 1896.

ANDREW EGHMMM, PHO'lO-UIHQWASNINGTON. D G

3 t e m M q M e h S 3 G N I L T U G U a d o M o m CUTTING DEVIOE FOR SEWING MACHINES.

No. 561,312 Patented June 2,1896.

ANDREW RGRAHAM. PNDTO-UTHQWASHINGTONJS.

ihvrrinn STATES PATENT @rricn.

URBAN GUTLING, OF \VURZBURG, GERMANY.

CUTTING DEVICE FOR SEWlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 561,312, dated June 2, 1896. Application filed June 12, 1895. Serial No. 552,592. (No model.)

To all whom, it may concern:

Be it known that I, URBAN GUTLING, of W'iirzburg, Bavaria, in the German Empire,

have invented an Improved Cutting Device for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

The device which forms the object of this invention and which may be applied to any sewing-machine and thrown into or out of action at will renders it possible to cut off cleanly and with certainty the edges of the material simultaneously when sewing.

Theinvention is also advantageously applicable for cutting out material and several layers of material may be simultaneously cut with this improved device.

The invention comprises a rapidly-rotating circular knife or cutter mounted upon a 1011- gitudinally-movable shaft which is. journaled in a vertically-movable frame held in operative position bya suitable spring and moved into inoperative position against the tenden cy of the spring by suitable operative means. A cheek piece or guide mounted 011 a longitudinally-movable bar is preferably employed for moving the shaft and cutter.

In the accompanying drawings, Figures 1. and 2 show, respectively, an elevation and plan of a sewing-machine fitted with the improved device. Fig. 3 is a side view of the device. Figs. 4: and 5 are front views showing the device thrown into and out of action, respectively, the cover-plate being removed in Fig. 4.. Fig. 6 is a side view of the knife, together with the knife holder or carrier. Fig. 7 is a plan of the device, andFig. R a section on the line 00 at of Fig. 4E.

The device is carried bya boX or casing to, which is held securely 011 the curved arm I) of the sewing-machine by means of a dovetailed piece I). The circular knife 0, which operates in a semicircular check or guide cl, is mounted on alongitudinally-movable spin'- dle e, which rests in bearings in a frame a (L The circular knife 0 is operated by means of a gearing c 0 0 Fig. 2, from the main machine-shaft by means of a belt g,which travels over the pulleys c and f.

The following arrangement is employed for enabling the cutting device to be rapidly and safely thrown into or out of action: A pin 1 Fig. 8, is arranged in the box or case a, on which pin there is mounted a toothed segment and a curved cam m. The pin icarries outside the case a crank it, so that by means of the latter the pint and with it also the toothed segment 7c and the curved cam m may be turned. The segment 76 engages with a rack Z, traveling in a guide-piece Z and the cam in is in contact with a pin 0, Figs. 4, 5, and 8, of the frame a 60 On the crank h being then turned in the direction indicated by the arrow in Fig. 1 the following takes place: The toothed segment kbrings the rack Z into the desired position, Fig. 5, and the connect ing-bar 71, arranged on the end of the rack, draws the spindle e and simultaneously also the sliding-bar g, which is square in section and carries the check (1, in their bearings in the direction of the longitudinal axis of the spindle. On the rotation of the crank it the cam m is also simultaneously revolved and lifts the pin 0, so that the latter passes from the position shown in Fig. i into that shown in Fig. 5. The pin 0 draws upward with it the frame a a and thus also the circular knife 0 in the cheek (Z.

On the rotation of the crank 7t in the direction of the arrow of Fig. 1 the circular knife 0 is thus both moved to the right and simultaneously raised and is thereby brought into a position in which the needle of the machine is entirely free, so that the machine may then be used as an ordinary sewingmachine. The belt 1) becomes loose on the frame a a being raised, and thus the circular knife 0 is brought to a standstill. A spring p, Fig. 4, is also simultaneously com pressed, and on the crank it being turned 'back-that is to say, on the device being thrown into gearautomatieally presses down the frame a (L The throwing into and out of gear of the circular knife 0 may thus be effected with the greatest ease and rapidity.

A regulatingscrew r is connected with the rack Z, so that the distance of the circular knife from the needle may be exactly adjusted. By revolving the screw r, the thread of which engages in the upper part on the connecting-bar n, and which screw also engages by means of a grooved shoulder r with a projection Z on the rack l, the relative position between the connecting-bar n and the rack is altered, and as the connecting-bar moves the circular knife 0 and the cheek d an exact adjustment of the distance between the needle and the circular knife is obtained. If the screw 0" be turned so far as to encounter the wall of the case of the apparatus, the rack is also moved and the frame a a raised, thus causing a raising also of the circular knife.

In order to secure the knife 0 in position when thrown into gear, Fig. 1, two screws are provided, which when they are tightened retain the sliding bar g, so that no shifting of the frame a a as regards said bar can take place.

By means of a screw a the whole device, which at its part b is of a suitable dovetail shape, may be moved up and down. It is thus quite possible to so regulate the adjust ment of the device that work may be performed by the same cleanly and with safety.

What I claim, and desire to secure by Letters Patent of the United States, is-

1. In combination with a sewing-machine, a vertically-movable frame, a rotatable longitudinally-movable shaft or spindle jour-- naled in said frame, suitable belt-gearing between the shaft or spindle and the machine, a circular cutter mounted on the shaft or spindle, a cheek or guide piece d mounted upon a longitudinally-sliding bar 9, which is also supported in said vertically-movable frame, and means for moving the frame vertically and the bar g and guide d longitudinally for moving the shaft and cutter, substantially as set forth.

2. In combination with a sewing-machine, a vertically-movable frame supported thereupon, a rotatable longitudinally movable shaft or spindle journaled therein, suitable gearing betweenv the machine and said shaft for rotating the latter, a circular cutter mounted upon the shaft, a suitable spring for holding said movable frame in one position, means for moving the frame into the other position against the action of the spring, and means for moving the shaft longitudinally in the frame, substantially as set forth.

3. In combination with a sewing-machine, a movable knife-holding frame a, a supported thereon, the shaft or spindle journaled in said frame and carrying a circular knife, a spring 19 for holding the frame normally in lowered position, a pin on the movable frame, a rack-bar, means connecting the rack-bar with the lon gitudinally-movable shaft or spindle, a cam m en gaging the pin, and a segmentrack engaging the rack-bar, substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

' URBAN GUTLING. \Vitnesses:

MATTE. ScHwANK, FRIEDRICH WALTER.