US448722A - Feeding mechanism for crochet-machines - Google Patents

Description

(No Model.)

J. M. MERRCW. PEEDINC MECHANISM POR CROCHET MACHINES.

No. 448,722. Patented Mar. 24, 1891.

NITED STATES PATENT Ormea.

JOSEPH M. MERROW, OF MERROV, CONNECTICUT.

FEEDING MECHANISM FOR CROCHET-MACHINES.

SPECIFICATION forming part of Letters Patent No. 448,722, dated March 24, 1891. Application filed May 20, 1890. Serial No. 352,526. (No model.)

To all whom it may concern.-

Be it known that I, JosnPH M. Mnnaow, of Merrow, in the town of Mansfield, county of Tolland, and State of Connecticut, have invented certain new and useful Improvements in Feeding Mechanism for Crochet or Overseaming Machines.

This invention relate to a novel and improved form, construction, and arrangement of feeding mechanism more especially designed for use in connection with crocheting or overseaming machines for producing a shell stich or scallop finish upon the edges of fabrics, to which end the feeding action is inter mitted or delayed, so as to take place after several successive movements of vthe sewing or crocheting mechanism, as hereinafter described.

In the drawings, Figure l is a side elevation, partly in section, of a crocheting-machine, showing the improved feed mechanism applied thereto. Fi g. 2 is an end view, and Fig. 3 a top plan View, of the feeding mechanism.

Similar letters and numbers of reference in the several ligures indicate the same parts.

The machine to which the present invention is shown applied is of a well-known type, wherein a vertically-reciprocaling needle carries the thread back and forth through the' material or fabric, and a looper or crochethook reciprocating at anangle to the needle above and below the fabric engages the thread,

' draws loops therefrom to or beyond the edge of the fabric and interloops them.

The principal elements of this machine are the main shaft A, journaled in frame B, and

carrying eccentric C and wheel D, a needlebar Il, connected threugh pin L with needlelever G, the latter provided with a ball F, engaged by pitman E on eccentric C, a presserfoot l, a work-plate I', and a crochet-hook or looper-carrier J, pivotally supported on a block K, guided to reciprocate on ways on the frame, said carrier being furnished with studs j, engaging camgi'oovesj in a pair of cylinders L L2, the latter geared together and driven from main shaft A, upon which one of said cylinders is mounted. As the main shaft A rotates, the cams operate to oscillate and reciprocate the carrier J, causing the crochet-hook a to reciprocate Iirst on one side and then on the opposite side of the fab- Vric held between the presser-foot and bedplate, the needle-bar being in the meantime reciprocated in its guides to cause the needle to carry the thread back and forth through the fabric. At each reciprocation of the hook the needle-thread is engaged and a loop drawn to or beyond the edge of the fabric.

For a more extended explanation of the construction and operation of machines of this type reference may be had to Patent No. 414,234. In forming shell-stitch or scallopwork with such a machine the needle is caused to penetrate the fabric several times at substantially the same point, the crochethook engaging the thread alternately on opposite sides of the fabric, and while these operations are taking place the feeding mechanisrn is arrested or held out of engagement with the fabric until the desired number of loops or stitches have been formed, when it is brought into operative engagement with the fabric to cause an advancing or feeding movement. The present invention has to do principally with a feed `mechanism of this kind. Upon the main shaft A or other shaft rotating in unison therewith is mounted a worm 1 in position to engage pins or teeth on a wheel 2, provided'with or connected to a cam-wheel or disk A feed-dog 4 is mounted upon a lever or carrier 5, which is pivotally connected to a lever 6, the latter provided with a pin or bearing 7 in position to be engaged by the cam 3, the latter operating to.

elevate the lever 6 and bring the feed-dog in operative relation with the fabric, as by projecting it through the slot in the bed-plate, and to retract the lever.l and feed-dog solas to withdraw the latter from contact with the fabric, as by dropping the feed-dog below the upper face of the bed-plate. By this means the feed-dog may be raised and lowered or brought into operative relation with the fabric at suitable intervals. The horizontal motion of the feed-dog in a direction to advance the fabric is effected by meansof a pitman 8 surrounding an eccentric 9 on shaft A and connected to the lever or carrier 5. 'As thus arranged each complete rotation of shaft A will effect one reciprocation of the lever 5, carrying the feed-dog, and but a partial rota- IOO tion of the cam-wlieel 3. Hence if the latter is so formed as to elevate the lever 5 and hold the feed-dog projected through the slot in the bed-plate during a portion only of the movenient of the cani-wheel 3, and While the feeddog is traversing forward or in the direction of the feed movement, and then permit or cause the feed-dog to descend below the bedplate and continue in that position during the balance of the rotation of the cam-plate, a single feed oi' advancing movement will be communicated to the fabric for seveial complete revolutions of the main driving-shaft Ai In the preferred form of embodiment of the said invention the thread of the Worin 1 is irregular-that is to say, foi' some distanceit is at rightaugles with the axis of rotation of its shaft, and when this portion of the thread lies between two of the pins on Wheel 2 the latter will be held from rotation until the angular or diagonal portions of the thread make contact with the pins to effect a partial rotaof the wheel 2. In the illustration the wheel 2 is provided with eight pins. Hence each rotation of the worin-wheel l will cause the wheel 2 to advance one-eiglith of a complete revolution, and the movement will take place during about one-lialf of each complete revolution of worm l, the wheel 2 remaining` stationary during the remainder of eacli revolution of the worm. Thus, instead of causing the wheel 2 to move continuously it is ad-` van ced interinittingly, there being a short delay between each movement and the latter being quickly performed. The lever G to which the feed-dog carrier 5 is pivoted may be held in contact with cam-wheel 3 and caused to descend by the action of gravity; or, if desired, a spring l0 may be arranged to engage said lever, and a suitable stop provided for limiting the downward movement. The eccentric 9 is made integral with or attached to the worm l, so as to prevent accidental misplacement.

The piii-wlieel and cam-disk may be formed integral; but they are preferably made separate and det-acliable to permit either part to be readily renewed.

The cam-wheel 3 foi' effecting the vertical movements of the feed-dog may be of any well known form or construction, either grooved or face. Normally, the feed-dog reciprocates with its teeth or engaging-surface below the work-plate, as shown in Fig. 2 5 but when the elevating portion 11 of the cam is brought under the stud or bearing 7 on lever 6 the longer arm of said lever is shifted, thereby raising the feed-dog until its teeth project above the work-plate, as shown in Fig. l. When carried to its highest point, the feeddog is drawn forward, acting upon the fabric to feed it the required distance, when the cam projection ll passes beyond the pin 7 and the feed-dog again drops below the work-plate, and its action uponthe fabric is suspended until it is again raised by the cam projection ll.

maree Having thus described my invention, what l claim as new is-- l. In combination with stitch-forming mechanism, a feed-dog and carrier pivotally connected to a vertically-movable support, a cam engaging said support to elevate the feed-dog, an eccentric and pitman or equivalent actuating device connected to the feed-dog carrier and operating to reciprocate the latter u pon its support, and Worin-gearing intermediate the driving-shaft and said cam, substantially as described. l

2. The combination, with a stitch-forming mechanism, of a reciprocating feed-dog and carrier pivotally supported upon a verticallymovable lever7 a cam engaging said lever, a wheel connected to said cam, and a worm s ecured to the driving-shaft and engaging said wheel to rotate the cam, substantially as described.

3. The herein described improved feed mechanism, consisting, essentially, of a rotating worm and eccentric, a wheel engaged by the worm and connected to a cam, alever engaging said cam, a feed-dog carrier p ivoted upon said lever, and a pitinan connecting the eccentric and the feed-dog carrier, the Whole combined substantially as and for the purpose specified.

4. In a feed mechanism such as described, the combination, with the wheel and its cani, the lever bearing the feed-dog carrier, and devices engaging the latter to reciprocate it, of the driving-worm provided with straight and inclined sections, substantially as described.

5. In a feed mechanism such as described, the combination, with the worm and the feeddog mounted upon a vertically and horizontally movable support, of the cam for elevating said support and the wheel provided with a series of pins greater in number than the elevating-sections of the cam-wheel, substantially as described.

6. In a machine such as described, the combination, with the stitch-forining mechanism and the main driving-shaft thereof, of the worm and eccentric applied to said shaft, the pin-wlieel and cam-disk, and the verticallymovable and horizontally-reciprocating feeddog carrier and its support, said support engaging the cam-disk, while the feed-dog carrier is connected to and operated by the eccentric, substantially as described.

7. In a machine such as described, the coinbination, with the needle and needle-bai', the crochet-hook, its carrier and actuating-cams, and the main driving-shaft carrying one of said cams and connected to the needle-bar, of the Worm and eccentric secured to the main drive-shaft, the wheel driven by said worin, a cam-disk connected to said wheel and provided with an elevating-section or protuberant portion, a lever or bar engaging said camdisk, and a feed-dog carrier supported upon said lever or bar and connected to the eccentric by a pitinan, substantially as described.

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8. The combination, with the main drivefier, and a, pin-Wheel connected t0 the cam shaft, its Worm and eccentric, and e. vertical and engaged by the Worm on the drive-shaft, feed-dog carrier, of the pitman connecting substantially as described.

said carrier and eccentric, the lever support-` JOSEPH M. MERROV. 5 ing the carrier and pivoted at one side of the Witnesses:

main s11aft,acam engaging said leverbe'ween CEAS. F. THAYER,

its pivot and point of attachment to the car- GEO. E. PARSONS.

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