US723898A - Fair-stitch machine. - Google Patents

Description

No. 723,898. PATENTD MAR. 31,- 1903.

E. F. MOWER.

FAIR STITCH MACHINE.

APPLIoATIoN FILED JULY 12, 1900. No Mon-EL. s sHEnTs-snnm' 1.

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No. 723,898. f PATBNTBD MAR. 31, 19h35;

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FAIR STITCH MACHINE. APvPLIOATION IILED JULY 12, 1900.

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,898. PATENTED MAR. 31, 190s. l E. P. MOWBR.

PAIR STITCH MACHINE.

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.EDWIN F. MOWER, OF IBOSTON, MASSACHUSETTS.

FAIR-.STITCH IVIACHIN E.

SPECIFICATION forming part of Letters Patent No. 723,898, dated March 31, 1903.

pplication filed July 12, 1900. Serial No. 23,355.- (No model.)

To all whom, t may con/cern:

Be it known that I, EDWIN F. MowER, of Boston, in the county of Suiolk and State of Massachusetts, have invented a new and useful Improvement in Fair-Stitch Machines, of which the following, taken in connection with .the accompanying drawings,`is a'specication.

My invention relates to a-fair-'stitch machine in which a reverse-hook needle and a thread-placer are used in connection with afour-motion loop-controller; and it consists in the arrangement and construction of those parts that are immediately engaged in forming the stitch, the object being to make a cheap, durable, and sure-working machine. This object I attain by the mechanism shown in the accompanying drawings, in which;-

tions of theloop-controller and its operating mechanism.

In this machinef'that is, a machine in which a needle with a reversed hook is used, as shown in Fig. 9-a thread-carrier is required. I will now proceed to describe this thread-carrier. It consists of a swinging lever T, pivoted at T and operated by camgroove T2. Near the lower end of this threadcarrier I have a guide, as shown at T0. At

the extreme lower end of the thread-carrier av hole Tt1 is made for the threadto pass through. The action of the thread-carrier issimply to draw the thread across the front of the needle, so as to insure its engagement with the hook, so that every downward movement of the needle will carry a loopthrough the stock W into the field of action ofthe loop-controller H10. The needle and awl bars are driven by the disk C, Fig. l, on the main shaft B. This disk C has two crank-pins mounted upon it in the usual manner of the double crankpin disk. A pitrnan C3 connects one of the crank-pins to the awl-bar D, and the pitman C2 con nect-s the other crank-pin to the needlein the direction of the dotted arc h h, Fig. l.

These motions are given to the loop-controller H10 by the eccentric H and cam K. (See Fig. 1.) The eccentric H Works through thelink H', pivot-pin H2, lever H3 H5, which swings on the fulcrum H4, link H0, and pivot-joint H7, and loop-controller lever H0, which tilts ou a moving fulcrum H8 and causes the loop-.controller H10 to move toward or away in a vertical arc from the stock YV or in the general direction ofthe dotted arch h. The other motionsnamely, the nearly horizontal ones-are imparted by the eccentric K working through the link K', pivot-pin K2, lever K10, (having a fulcrum at K3,) link K5, pivoted at K4 and K0, bell-crank lever K7 K8, having a fixed f ulcrumV at K0 and. connected to the loop-controller lever H0 at HS. The motion thus communicated causes the loop-controller H10 to move. nearly horizontally in the direction of the vdottedarc k k.

In addition to the vordinary presser-foot P an additional laterally adjustable stitchholder G is used. It is attached to the presserfoot bar P by screws G G'. f

The method of forming the stitch is illustrated in Figs. 2 to 8, inclusive. Figs. 2 and 3 show the starting positions. In Fig. 4 the thread is shown as carried by the needle E' just through the stock W. For convenience in describing the formation of the stitch, We assume that one has beenformed asillustrated in Fig. 4. The needle continues inits downward motion until it has varrived at its lowest position and has just begun its upward movement. This will cause a loop to form, as shown in Fig. 5. Now the loop-controller H10 will takev the loop and the needle will go upward, the loop-controller following but keeping the thread taut. (See Figs. 5 and 6:) A continued upward movement of the needle and of the loop-controller H10 will and to follow it keeping it; taut, and to Withdraw from it, whereby the thread-carrier may draw the thread taut and thus complete the stitch; and means for operating the same; substantially as and for the purpose set forth.

In testimony whereof I have signedw my name to this specification, in the presence of two subscribing Witnesses, on this 13th day of June, A. D. 1900.

EDWIN F. MOXVER.

Witnesses:

FRANK G. PARKER, HARRY C. GLAPP.

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