US2527163A - Turfing device - Google Patents

Description

Oct. 24, 1950 l. VAN DYKE E-rAl. 2,527,163

TURFING DEVICE Filed March 10, 1949 2 Sheets-Sheet 1 O'ct. 24,I 1950 l.. VAN DYKE Erm. 2,527,133

TURFING DEVICE l Filed Mmm 1o, 1949 2 sheets-sheet, 2

eff/Sg' Patented Oct. 24, 1950 TURFING DEVICE Louise Van Dyke, Chattanooga, Tenn., and William D. Van Dyke, Glendale, Calif., assignors to Van Dyke Textigraph Company, a partnership composed of Louise Van Dyke and Maude Farquhar Van Dyke, Chattanooga, Tenn.

Application March 10, 1949, Serial No. 80,714

2 Claims.

The present invention relates to turng devices of the general character illustrated and described in United States Letters Patent Nos. 1,888,941 and 1,937,257, issued to William D. Van Dyke on November 22, 1932, and November 28, 1933, respectively.

The turng devices illustrated and described in the above mentioned patents have gone into widespread commercial use and their operation has been for the most part satisfactory. We have found that those devices have not been entirely smooth in their operation and that vibration of the devices has tended to tire operators and in some instances to reduce the quality of their Work. Those devices have been provided with slender, hollow needles having a slot or aperture in their side walls for introduction of the yarn to the hollow bores of the needles. Such needles are inherently weak adjacent the aperture or slot and there has been considerable needle breakage resulting from either improper manipulation of the devices or fatigue failure of the metal of the needles. The needle breakage has been troublesome not only because of the resulting delays but because of the expense involved in replacing the needles` Such devices have also required service or repair from time to time and this has been a major operation with the arrangements illustrated in the foregoing patents.

The objects of the present invention are to provide a device of this character which operates more smoothly and with less vibration, which virtually eliminates troublesome and expensive needle breakage and which can be easily disassembled for servicing or repair.

The foregoing and other objects and advantages of the invention will be referred to in the following detailed description which has reference to the accompanying drawings wherein:

Figure l is a side elevation View of a turng device embodying the present invention;

Figure 2 is a bottom plan view thereof;

Figure 3 is a top plan View thereof;

Figure 4 is a longitudinal sectional view showing a portion of the device and taken in the direction of the arrows along the line 4-4 of Figure 2;

Figure 5 is a view similar to Figure 4 but illustrating portions of the device not seen in that figure, this View being taken in the direction of the arrows alongthe line 5 5 of Figure 2;

Figure 6 is a transverse sectional View taken 2 in the direction of the arrows along the line 6-6 of Figure 1;

Figure 7 is a transverse sectional view taken in the direction of the arrows along the line 'I-l of Figure l;

Figure 8 is a transverse sectional view taken in the direction of the arrows along the line 8 8 of Figure 1; and y Figure 9 is a perspective view of a needle assembly used with the device.

The device includes a tubular housing I0 which is surrounded by a tubular collar II along its mid-portion. The collar II carries tubular yarn guides I2 and I3 through which yarn may be fed in the manner hereinafter described. The collar I I is secured in position on the housing Ill by means of a threaded screw I4 which extends through the collar and housing and into a circular bearing race l5.

rThe device may be operated by means of power transmitted through a rotating flexible shaft, not shown, to a spindle I6 which is capable of being inserted and withdrawn from the rearward end of the housing I9. The spindle i6 is flat on one side as indicated at Il' and this flat side engages a roller clutch member I8 which causes the tubular lbearing member I9 to rotate during rotation of the spindle I6. The tubular bearing member I9 has combined radial land thrust ball bearings 2li positioned between its inner end and the bearing race I5 and similar ball bearings 2! positioned between the outer end of the member I9 and an exteriorly threaded retainer 22 which is threaded into the rearward end of the housing Il).

A shaft 23 is threadedli7 secured at 24 to the inner end of the tubular bearing member I9 and extends inwardly through the bearing race I5. The inner end of the shaft 23 is angular in cross section and is'received in an angular opening 25 in the outer end of a double-screw threaded member 26, thus effecting rotation of the inember 26 during rotation of the spindle I6. The double-screw threaded member 26 has on its outer surface a cut groove 21 in the form of reversely progressing spirals having their ends joined in a manner well understood in the art. A boss 28 is riveted or otherwise secured to the collar II. A cap 29 is screw threaded at 30 to the boss 28 and extends through apertures in the collar II and in the tubular housing Iil. The cap 29 is provided with .a central cavity in which a paWl pin 3| is pivotally or rotatably mounted in the manner best illustrated in Figures 4 and 'needles communicate with the notch 48.

. above.

7. The pawl pin 3i includes a projection 32 of a shape in cross section which resembles a fiattened oval so that it can ride smoothly in the groove 2 and thus cause reciprocation of the member 26 during rotation of that member. The cap 29 includes an apert 'fe 33 through which oil may be applied to lubricate the pawl pin 3|.

A pin 31|, which is provided with a head 35, is secured within the end of the member 2B by means of clamping screws 36. The head 35 of the pin 3d bears against a shoulder 3l of a tubular sleeve 38 and serves to retain the sleeve 38 against the thrust ball bearings 3d which are positioned between the adjacent ends of the sleeve 38 and the member 2S, The tubular housing l is provided with an elongated slot le and a guide screw 4| has a square head l2 which is slidable in this slot when the screw is threaded into the sleeve 38 in a man er illustrated in Figures 4 and 8.

vThe slot 48 has a circular enlargement Q3 at one end thereof te permit rotation of the squareheaded screw :2| for insertion and removal from the sleeve 3S. 1t will be apparent from the foregoing that reciprocal motion is imparted to the sleeve 38 during rotation and reciprocation of the member 26 but that the sleeve 38 is prevented from rotating by the square head d2 of the screw 4|.

A bushing ad lies within the sleeve 38 and is retained therein by means of the screw 11|. clamping screw l5 is threaded through the sleeve 38 and the bushing fill and engages a cylindrical projection on the needle asembly to hold that assembly in proper position.

The needle assembly includes a block l with which the projection 155 is integral and this block is slidable within the housing l. The block 4l is provided with a notch 48 in its lateral face which lies adjacent the slot d. A Ipair of hollow needles 4S and have their Shanks secured within the block il and the hollow bores of these The needles 49 and extend through parallel aper- -tures in a presser foot 5| which is removably n the operation of the device, two strands of yarn are fed through the yarn guides i2 and |3 and through the slot le into the notch dil. rhe yarn then passes through the bores of the hollow needles 49 and 5% and projects beyond the ends of those needles. It will be obvious that it is not necessary to use two yarn guides and two needles and that a greater or lesser number of needles and yarn guides may be provided. A flexible cable or drive member is secured to the device to rotate the spindle Rotation cf the spindle I6 causes rotation and reciprocation of the double-screw threaded member 2E and this causes reciprocation without rotation of the sleeve 38 and the needle assembly in the manner described The presser foot 5| is held against a fabric and the device will form tufts of yarn in the fabric in a manner well understood in this art.

An important feature of the invention resides in the needle assembly. The notched block 4'! is accurately guided by the inner surface of the housing lil. The yarn is fed from the notch 48 directly into the hollow bores of the needles and it is thus unnecessary to provide slots or apertures in the walls of the needles. This arrangement greatly strengthens the needle assembly and we have found that it has virtually eliminated the expense and inconvenience of needle breakage.

The arrangement of the anti-friction bearings contributes to the smoothness of operation of the device and the tubular or circular character of most of the relatively movable members permits the device to be manufactured with close tolerances which greatly reduces vibration and consequent fatigue on the part of operators.

The double-screw threaded member 26 and the pawl pin 3| receive the most wear and these are the members requiring most frequent replacement. Our arrangement provides a convenient procedure for removal and replacement of these members. The cap 29 and the pawl pin 3| are first removed. The clamping screw 45 is then loosened or removed so that the needle assembly is free to rotate relative to the sleeve 38 and the bushing 44. The presser foot 5| and the needle assembly may then be removed. The flat head 42 of the screw 4| is then positioned in the circular enlargement 43 of the slot 40 and the screw 13| can be removed. The member '26 and the parts attached thereto can then be readily removed from the forward end of the housing I0. The parts can be assembled in a reverse manner after appropriate repair or replacement.

We have illustrated and described what we now consider to be the preferred embodiment of our invention. However, it will be obvious that various modifications may be resorted to without departing from the broader scope of the invention as defined by the following claims.

Having thus described our invention, we claim:

l. A turng device comprising a tubular housing, a double screw threaded member rotatable and reciprocable within said housing, a cap removably secured in the wall of said housing, a pawl pin pivotally mounted in the inner end of said cap in position to engage the threads of said screw threaded member to cause said member to reciprocate during rotation thereof, means for rotating said member, a sleeve reciprocable within said housing and rotatably secured to said member in end to end axial alignment therewith, a slot in the wall of said housing extending longitudinally thereof, a projection removably secured to said sleeve and slidably positioned in said slot to prevent rotation of said sleeve during reciprocation thereof, a `presser foot detachably secured to the end of said housing, a block detachably secured to said sleeve and slidable within said housing, said block having a notch in the lateral surface thereof adjacent said slot, and a hollow needle having its shank Secured in said block with the bore of the needle in communication with said notch, said needle being reciprocable within an aperture in said presser foot, whereby yarn may be fed through said slot into said notch and through the bore of said needle for insertion into cloth positioned adjacent said presser foot.

2. A turng device comprising a tubular housing, a double screw threaded member rotatable and reciprocable within said housing, a cap removably secured in the wall of said housing, a pawl pin pivotally mounted in the inner end of said cap in position to engage the threads of said screw threaded member to cause said member to reciprocate during rotation thereof, means for rotating said member, a sleeve reciprocable within said housing and rotatably secured to said member in end to end axial alignment therewith, a slot in the wall of said housing extending longi- 5 tudinally thereof, said slot having parallel side walls along the major portion of its length and being of increased width adjacent one end of said housing, a presser foot detachably secured to said one end of said housing, a needle assembly secured to said sleeve within said housing and having a needle extending through an aperture in said presser foot, a screw threaded into said sleeve, said screw having a polygonal head positioned Within said slot to prevent rotation oi said sleeve during reciprocation thereof, said serew being prevented from rotation relative to said sleeve by engagement of its head with the parallel side walls of said slot and being rotatable for removal from said sleeve While the screw head is positioned within the portion of said slot of increased width.

LOUISE VAN DYKE. WILLIAM D. VAN DYKE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

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