US1190407A - Differential feed mechanism for spinning or combing machines. - Google Patents

Description

P. HELMBOLD & J.WEINBRENNER.

DIFFERENTIAL FEED MECHANISM FOR SPINNING 0R COMBING MACHINES.

APPLICATION FILED IAN-20. I9I3.

LIQQAW. Patented July 11, 1916.

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PAUL HELD/30141), GF CQLLIAR, AND JULIUS "WEINBRENNER, OF THANN, GERMANY.

wearer.

Specification of Letters Patent.

Patented July lit, t ilfi.

Application filed January 20, 1913. Serial No. 743,023.

To all whom it may concern:

Be it known that we, PAUL HELMBOLD, a subject of the Emperor of Germany, residing at Colmar, Alsace, Germany, and Jumns NEINBRENNER, a subject of the Emperor of Germany, resident at Thann, Alsace, Germany, have invented new and useful Improvements in Differential Feed Mechanism. for Spinning or Combing Machines, of which the following is a specification.

his invention has reference to improvements in differential gear for producing periodic variations of speed of the feed rollers or drawing-off rollers in spinning or combing machines.

The characteristic feature of our invention is the combination with a spinning or combing machine of a differential gear for driving the feed rollers or drawingoff rollers, in which gear the motion of the differential wheel is the resultant of the motion of a wheel which is rotated forward continuously from the main shaft of the machine, and of an oscillatory motion which is imparted by a crank mechanism.

The feeding of fibrous material in spin ning machines with periodic increase and reduction of speed for various purposes is already known. This is effected for example by inter-posing between a shaft which has a reciprocating motion and the actual feed mechanism a sweeping out device which is alternately put into and out of action. A portion of the rearward movement is thereby afiected in such a manner that it is shortened as compared with the forward movement. This feeding arrangement is in general use in combing machines. As a further known example of variations of the feed at regular intervals, may be mentioned the driving of the rear fluted rollers of a ring spinning machine through toothed cam disks in the manufacture of yarn which is thickened at certain parts. Both of these methods of feeding have serious defects. When the first method of driving is adopted, shocks and vibrations are unavoidable while an objection to the latter is its slight adaptability to the various requirements in ring spinning operations.

The present invention obviates these defects. lts adoption insures perfectly quiet running without shocks, with the most favorable speed curves. The difierential gear which forms the subject-matter of the invention meets all requirements as regards frequency of the speed variations and maximum speed and it can be adjusted very readily.

In accordance with our invention a differential mechanism of peculiar construction is interposed between a driving shaft and the actual feed mechanism, the chief characteristic of the said differential mechanism consisting in that the driven toothed wheel of the differential mechanism is subjected to the simultaneous action of two toothed driving systems, one of which is regularly and continuously rotated while the other has a reciprocating motion imparted to it. From the compound action of these two driving mechanisms there results a regular periodic succession of variations of speed in the motion of the driven wheel and of the feed mechanism controlled thereby, without any shock.

One constructional form of the invention is illustrated by way of example in the accompanying drawing, in which Figure l is a diagrammatic longitudinal section of the mechanism, and Figs. 2 and 3 are corresponding motion diagrams.

A driving system which rotates regularly and continuously and consists of a shaft a, a spur wheel Z keyed on the shaft and a spur wheel 0 likewise keyed on the said shaft is mounted in any suitable manner on the frame of the machine. The wheel 6 receives its rotary motion from the source of power by means of suitable intermediate wheels. The motion is transmitted from c to a wheel a, mounted concentrically with 0 and provided with inwardly projecting teeth cl, by means of planet wheels f. Another driving system serves for producing a reciprocating swinging motion which is likewise transmitted to the wheel 6. In the constructional form illustrated this driving system consists of various members combined as follows:A shaft h which is rotated regularly from the source of power in any suitable manner, for example through the intermediary of the spur wheel g keyed thereon, rotates constantly in a suitable bearing arranged on the frame of the machine. On the said shaft a disk 71 is keyed which carries a crank pin is, on which the head Z of a crank rod Z is mounted. @n the shaft a a disk or provided with a guide sleeve and carrying a crank pin m is mounted concentrically. The other "movement of the wheel e.

head Z of the crank rod Z is mounted on the pin m. The disk 1?, which has a reciprocating swinging motion imparted to it carries one or more pins 0 which serve as bearmgs 'for the toothed planet wheels f. In addition to acting as already indicated these planet 7 -wheel s serve for transmitting the oscillating movement of the disk 72 to the internal teeth d of the wheel 6.

The simultaneous action of the two drivmg mechanisms described upon the driven wheel 6, the individual graphic curves of which mechanisms unite in one combined kinematic curve, is seen from the diagrams given in Figs. 2 and 3. The curve in Fig.

2 represents the result when the oscillating stroke of the disk n is long, so that the swinging movement of the said disk during the rearward movement produces a retardation of the Wheel 6 beyond the zero point,

6. produces movement in the negative direction. The wheel 6 is therefore likewise subjectedto an oscillating movement but in 'such a manner that the travel in one direction appears greater than the stroke in the opposite direction.

The curve inrFig. 3 represents the result of a short oscillating stroke of the disk n, 'so that the swinging movement of the said disk during the rearward movement only produces a slight retardation of the plus- The wheel 6 is not subjected to; any oscillatingmovement but only to a plus-movement with periodic increase or decrease ofspeed. The oscillating motion represented by the curves in 'Figs. 2 and 3 meets'all the requirements in feed-ing the fibrous material in a combing machine in an ideal manner, as the outer teeth 29 of the wheel 6 are utilized for driving the stripping cylinder. The motion represented by the curve in Fig. 3 is suited for further by shortening or lengthening the stroke of the crank pin is.

What we claim as our invention and desire to secure by Letters Patent is In a combing machine, the combination with a frame, of a driven wheel having a hub journaled in the frame and provided with internal and external gear teeth, a driving shaft having one end journaled in the frame and the other end journaled in the hub of said driven wheel, a gear on said shaft by which it is rotated, a sunwheel fixed on the shaft, a disk loosely mounted on said shaft, planet wheels which are mounted on pins carried by said disk 'and are in gear with the sun-wheel on the one hand and with the internal teeth of the driven wheel on the other hand, a crank device connected to said disk for imparting oscillatory motion thereto, and means independent from said shaft for disk.

In testimony whereof; we have signed our names to this specification in the presrotating said *ence of two subscribing Witnesses.

PAUL HELMBOLD. JULIUS WEINBR-ENNER. lVitnesses:

G120. Girronn, I ARNOLD Zmsnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O.

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