US766130A - Revolving-hook sewing-machine. - Google Patents

Description

PATENTED JULY 26, 1904.

P. ANSOHU'TZ.

REVOLVING HOOK SEWING MACHINE.

APPLICATION FILED NOV. 11, 1903.

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N0 MODEL.

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PATENTED JULY 26, 1904.

P. ANSGHUTZ.

REVOLVING HOOK SEWING MACHINE.

APPLIOATION FILED NOV. 11, 1903.

3 SHEETS-SHEET 2.

N0 MODEL.

mu E S S M T W A TTOHN E Y8 No. 766,130. PATENTED JULY 26, 1904. P. ANSCHY ITZ.

REVOLVING HOOK SEWING MACHINE.

APPLICATION FILED NOV. 11, 1903.

N0 MODEL. 3 SHEETS-SHEET 3.

UNITED STATES Patented July 26, 1904.

PATENT OFFICE.

PAUL ANSOHUTZ, OF NEIV YORK, N. Y., ASSIGNOR OF ONE-l-[ALFIIO GEORGE BIOKELHAUP", OF NEIV YORK, N. Y.

REVOLVING-HOOK SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 766,130, dated July 26, 1904.

Application filed November 11, 1903. Serial No. 180,696. (No model.)

Be it known that I, PAUL ANsoiu'i'Tz, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Revolving- Hook Sewing-Machine, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved revolving-hook sewing-machine which is simple and durable in construction, very effective in operation, and arranged to insure the formation of a uniform lockstitch in a simple manner without danger of missing stitches.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is an end elevation of the improvement. Figs. 2 and 3 are like views of the same, showing the parts in difl'erent positions. Fig. 4 is an enlarged sectional plan view of the same on the line at a of Fig. 1. Fig. 5 is an enlarged end elevation of the needle and the coacting loop-taker and loop-spreader for the thread-loop. Fig. 6 is an enlarged end elevation of the improvement, showing the bobbincase carrier removed and the throatplate in section. Fig. '7 is a perspective view of the loop-spreader. Fig. 8 is a like view of the looptaker. Fig. 9 is a front elevation of the bobbin-case. Fig. 10 is a sectional plan view of the bobbin, the bobbin-case, and the bobbincase carrier. Fig. 11 is a sectional side elevation of the improvement. Fig. 12 is an enlarged plan view of the bobbin. Fig. 13 is a reduced end elevation of the improvement, showing the operating mechanism for oscillating the shaft employed for actuating the loop-taker and the loop-spreader; and Fig. 14: is a like view of the operating mechanism for imparting a rotary motion to the said shaft.

The sewing-machine in its general construction is provided with the usual reciprocating needle-bar A, carrying the needle B, through the eye B of which (see Fig. 5) extends the thread O, unwinding from a spool and passing through a tension device D of usual construction. The thread C between the needle-eye B and the tension device 1) passes through the eye of a take-up E, and the said thread forms, with the bobbin-thread G, unwinding from the bobbin F, a lock-stitch in the fabric 3r, moved transversely by the feed-bar and pressed on by the usual presser-foot H. The parts so far mentioned are of usual construction and operation, so that further description of the same is not deemed necessary.

The bobbin F is mounted to turn in a bobbin-case I, contained loosely in a bobbin-case carrier or cage J, (see Figs. I and 10,) preferably formed of a member J, fixed on the sowing-machine frame K, and a hinged member J adapted to swing open to allow the insertion or removal of the bobbin-case I and its bobbin F, the said hinged member J being normally held in a closed position by a spring J. (Soc l, 2, and 3.)

In order to engage the thread-loop 0 alongside the needle at the time the latter is in a lowermost positionthat is, with the needleeye B below the needle-throat L of a throatplate L a loop-taker N is provided, which delivers the thread-loop (J (see Fig. 4:) to a loop-spreader O (see Figs. 7 and 11) during the time the loop-taker N and the loop-spreader O move bodily in a segmental path in the direction of the arrow a (see Fig. 6) along the peripheral edge of the bobbin-case F from the top thereof (see Fig. 1) to a distance somewhat beyond the bottom thereof (see Fig. 3) to cast the loop off for the take-up E to draw up the loop and with the bobbin-thread C extending through the loop O to form a lock-stitch on the under side of the cloth G.

Now in order to impart the desired swinging motion to the loop-taker N and the loopspreader O relative one to the other and to move the said loop-taker and loop-spreader simultaneously and bodily in a segmental path in the direction of the arrow (5 the following means are provided: The loop-spreader O is secured on the outer end of alongitudinally-ex tending shaft P, having its bearingin the free end of a crank-arm Q, (see Figs. 4: and 11,) attached to a rock-shaft Q,driven from the main shaft of the sewing-machine, so as to reciprocate once for every full stroke of the needle-bar.

a guide-rod R, mounted to slide in a sleeve R fulerumed at R on the main frame of the sewing-machine a distancebelow the pivot P as plainly indicated in Fig. 6.

Then the crank-arm Q swings downward and upward during the time the needle-bar A makes a full reciprocating motion, then the shaft P is carried along by the crank-arm Q, and in doing so the shaft is turned in its bearing in the crank-arm by the action of the guide-rod P, sliding in the pivot-sleeve P so that the loop-spreader O is rocked and at.

the same time is carried bodily in a segmental path, as previously mentioned. In a like manner the loop-taker N-is rocked as the eye R is hung loosely on the shaft P and is held on the guide-rod R, mounted to slide in the.

sleeve R and by arranging the sleeves P and B one above the other, as described, the loop-taker N and the loop-spreader O are rocked first toward each other during the downstroke of the crank-arm Q and from each other during the upstroke of the crankarm Q.

. The crankarm Q begins its downward swinging motion at the time the needle-bar A starts on the upstroke,and when the crank-arm Q swings upwardly the needle-bar A descends, and at the time the coacting loop-taker N and the loop-spreader 0 have reached their uppermost positions the loop-taker N stands somewhat in the rear of the needleB (see Figs. 1 and 4) and with its free end in alinement with the thread-loop C so that on the next bodily downward movement of the looptaker N and the loop-spreader O the looptaker N passes into the loop C and thus draws the loop along, (see Fig. 2,) and as the looptaker N and the loop-spreader 0 swing toward each other it is evident that the loop finally passes from the loop-taker N onto the loopspreader 0, (see Fig. 6,) and the latter now carries the loop along past the lower end of the bobbin-case to finally assume such a positionas to cast off the loop for the take-up E to draw the loop upward. (See Fig.

The axis of the pivot P is slightly above the horizontal plane extending through the axis of the rock-shaft Q, while the axis of the pivot R is a distance below the said plane to cause the loop-taker N and the loop-spreader O to swing properly toward and from each other for the loop-taker N to first engage the thread-loop and then deliver the threadloop to the loop-spreader O and for the latter to finally assume a cast-off position to cast off the thread-loop at the time the loop-taker- N and the loop-spreader O are at the end of the downward throw.

The bobbin I (see Figs. 6, 9, and 10) is provided at its top with a longitudinallyextend ing lug I, fitting loosely into recesses on the inner edges of the members J and J of the carrier J to hold the bobbin-case from turning in the bobbin-case carrier, but to allow a slight up-and-down movement of the said bobbin-case for the passage of the thread-loop, as:

previously explained.

From the lug I extends a peripheral rib I downwardly, and this rib splits into diverging rib-arms 1 leaving a groove I between the arms for the end of the loop-spreader O to travel in the groove, the loop-spreader being preferably \l-shaped, so that the threadloop C in sliding from the point of the loopspreader 0 toward the back of the bobbincase readily passes to the outside of the ribarms I and finally to the sides of the bobbincase. (See Fig. 3.)

The loop-spreader O is formed at its front face with a perforated rib O for preventingthe needle-loop C from sliding too far back on the loop-spreader 0 when the latter carries the loop around the lower portion of the bobbin-case, as previously explained.

As soon as the loop-spreader 0 passes the bottom of the bobbin-ease I the thread-loop slides off the loop-spreader owing to the action of the take-up E, and as the loop has now passed the bottom of the bobbin-case it is evident that the loop is drawn up at the rear edge of the case and must necessarily engage the bobbin-thread C, extending from the bobbin F up to the previous stitch in the cloth G. The rib I gradually diminishes in height from the top of the bobbin-case I toward the bobbin, as will be readily understood by reference to Fig. 6; but the groove 1* gradually increases in depth for sliding the loop easily over the loop-spreader and over the arms I to the sides of the bobbin-case.

The axis of the shaft Q is slightly out of alinement with the axis of the bobbin F and its bobbin-case I, as indicated in Fig. 6, to permit the loop-spreader O to travel snugly in the groove I", which deepens gradually from the beginning point at the end of the rib I to the end beyond the bottom of the case. By this arrangement the thread-loop C cannot possibly get caught between the rib-arms I and the loop-spreader O, and hence the loop 0 is properly passed over the bobbin-case I from the front to the rear.

The bobbin F is mounted to revolve freely in the bobbin case to pay off thread as called for by the formation of the stitches.

The bobbin-ease I is provided in its rim with an angular slot I (see Fig. 6) for the passage of the thread C from the bobbin F, the thread then passing under a tension-plate I and through a recess l in the said plate to the under side of the cloth. By this arrangement sufficient friction is given to the thread to prevent the bobbin F from turning too far when paying off thread. A spring-catch I on the bobbin-case I serves to hold the bobbin against accidentally falling out of the case.

The opposite members J and J of the bobbin-case carrier stand far enough apart (see Fig. 11)) to accommodate the rib I and its arms I and to allow the loop-spreader O to travel in close proximity to the peripheral face of the bobbin-case, as previously explained.

The operation is as follows: lVhen the sewing-machine is in operation and the thread C has been carried by the needle B through the cloth (i (see Fig. 1) and the loop is formed on the side of the needle at the beginning of the return stroke of the needle-bar A, then the loop-taker N engages the loop 0 and carries the same along in the direction of the arrow 1/, as the loop-taker N and the loopspreader 0 new travel downwardly at the front peripheral edge of the bobbin-case I. During this downward travel of the looptalier N and the loop-spreader O the loopspreader O finally passes with its outer end into the loop C and the latter finally passes over the free end of the loop-taker N, so that the loop is now carried solely by the loopspreader 0 past the bottom of the bobbincase I, at which time the loop-spreader O assumes a cast-01f position, so that the loop readily slides off the loop-spreader O and is drawn upward by the action of the take-up E. By the arrangement described the loop is carried transversely with the bobbin-case, passing through the loop for the latter to finally engage the bobbin-thread U to form a stitch on the under side of the cloth G as the loop is drawn up by the take-up E. During the descent of the needle-bar A the loop-taker N and the loop-spreader 0 swing back in the inverse direction of the arrow (1 to finally again assume their uppermost positions, as previously explained and illustrated in Fig. 1, and then the above described operation is repeated.

From the foregoing it will be seen that the stitch-forming mechanism is exceedingly simple in construction and absolutely positive in operation without danger of missing stitches.

Although I have shown and described the loop-taker N and the loop-spreader O as oscillating bodily, it is evident that the said loop-taker N and the loop-spreader 0 may be caused to swing completely around that is,

have a rotary instead of an oscillating motion the shaft Q then running continuously in the direction of the arrow 1/. (See Fig. let.) The hinge for the bobbin-case carrier J is arranged somewhat to one side (see Fig. 10) to allow a ready passage of the loop-taker N and the loop-spreader O.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A sewing-machine provided with a bobbin-case carrier, adapted to be opened, a bobbin-case loose in the carrier and having means for holding the bobbin-case against turning and to allow up-and-down movement thereof, the bobbin-case having on a portion of its peripheral face a ridge terminating in diverging arms, a loop-taker and a l0op-spreader operating in conjunction one with the other, for the loop-taker to take the needle-loop and deliver it to the loop-spreader, the point of the latter being adapted to travel in the groove formed by the said diverging arms, and means for rocking the loop-taker and loop-spreader toward and from each other and moving the loop-taker and loop-spreader bodily along the said ridge, as set forth.

2. A sewing-machine provided with a bobbin-case carrier, adapted to be opened, abobbin-case loose in the carrier and having transverse lugs fitting recesses in the said carrier, to hold the bobbin-case against turning and to allow up-and-down movement thereof, the said bobbin-case having on a portion of its peripheral face a ridge terminating in diverging arms, the ridge and its arms extending from the top of the bobbin case past the bottom thereof, a loop-taker and a loop-spreader operating in conjunction one with the other, for the loop-taker to take the needle-loop and deliver it to the loop-spreader, the point of the latter being adapted to travel in the groove formed by the said diverging arms, and means for rocking the loop taker and the loopspreader toward and from each other and moving the loop-taker and the loop-spreader bodily along the said ridge, as set forth.

3. In a sewing-machine, the combination with a bobbin, of a loop-taker and a loopspreader rocking toward and from each other, the loop-taker taking the needle-loop and delivering it to the loop-spreader and the latter passing it around the said bobbin, the said loop-taker and the said loop-spreader moving bodily in a circular path along and approximately parallel to the peripheral edge of the said bobbin, the said path being transverse to the axis in which the said loop-taker and'loopspreader rock and in the plane in which the said loop-taker and the said loop-spreader rock, the said bobbin lying in the said plane.

a. In a sewing-machine, the combination with a bobbin, of a loop-taker and a loopspreader rocking toward and from each other, the loop-taker taking the needle-loop and delivering it to the loop-spreader and the latter passing it around the said bobbin, the said loop-taker and the said loop-spreader moving bodily in a circular path along and approximately parallel to the peripheral edge of the said bobbin, the said path being transverse to the axis in which the said loo p-taker and loopspreader rock and in the plane in which the said loop-taker and the said loop-spreader rock, the said bobbin lying in the said plane, means for bodily carrying the said loop-taker and the said loop-spreader bodily in the said path, and means for rocking the said looptaker and the said loop-spreader in the said plaiile at the time they are traveling in the said pat 5. A sewing-machine provided with a bobbin-case carrier, a bobbin-case loose in the carrier, a loop-taker and a loop-spreader rocking toward and from each other in a plane in which the said bobbin-case carrier and the said bobbin-case are disposed, the said loop-taker and the said loop-spreader'being capable of working toward and from each other from a common aXis and in concentric circular paths, means for rocking the said loop-taker and the said loop-spreader, and means for simultaneously carrying the said loop-taker and loopspreader bodily in a circular path along the peripheral edge of the said bobbin-case.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PAUL ANSOHUTZ. Witnesses:

THEO. G. HOSTER, EVERARD B. MARSHALL.

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