US427750A - daniels - Google Patents

Description

(No Model.) a Sheets-Sheet 1f T. J. DANIELS. MACHINE FOR SEWING UP THE MOUTHS 0F FILLED BAGS.

No. 427,750. Patented May 13, 1890.

' (No Model.) 3 Sheets-Sheet 2.

T, J. DANIELS. MAGHINE FOR SEWING UP THE MOUTHS 0P FILLED BAGS.

No. 427,750. Patented May 13, 1890.

(No Model.) 3 Sheets--Sheet 3.

T. J. DANIELS.

MACHINE FOR SEWING UP THE MOUTHS 0F FILLED BAGS.

No. 427,760. Patented May 13, 1890.

, broken away and in section.

UNITED STATES PATENT QEEICE.

THOMAS J. DANIELS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO SPERRY & 00., OF SAME PLACE.

MACHINE FOR SEWING UP THE MOUTHS OF FILLED BAGS.

SPECIFICATION forming part of Letters Patent No. 427,7 50, dated May 13, 1890.

Application filed January 2, 1890. Serial No. 335,655. (No model.)

To (0% whom it may concern.-

Be it known that I, THOMAS J. DANIELS, a citizen of the United States, residing in the city and county of San Francisco, State of California, haveinvented an Improvement in SewingMachines; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to certain improvements in sewing-machines; and it consists in the construction and combinations of devices which I shall hereinafter fully describe and claim.

Figure l is a perspective view of the apparatus. Fig. 2 is a side elevation with parts Fig. 3 is a view of a portion of the treadle mechanism. Fig. i is a view of part of the machine, showing the feed and latch mechanism. Fig. 5 is a diagram showing the movement and position of the looper.

This machine is especially devised for the purpose of closing and sewing the mouths of flour or other bags after they have been filled, with the view of closing the bags with a peculiar stitch, so that after having once been opened and the contents removed the bags cannot be filled with inferior goods for the purposes of deception.

A are the side frames of the machine as at present constructed.

B is the power-shaft, journaled in boXes across the top of the frame, and having a pulley O or other suitable equivalent means for rotating, the shaft.

D is the sewing-machine case, which is suspended from the shaft B by boxes E, and the mechanism of the machine is rotated by the beveled gear F and pinion F, the gear traveling upon the shaft B and the pinion being fixed upon the shaft G of the sewing-machine. The sewing-machine is thus suspended so as to hang below the shaft 13, and its lower side is formed with grooves or channels II, which are fitted to travel upon the horizontal guide-bar I, which extends across the frame of the machine and parallel with the shaft B.

J J are two toothed racks which extend across the frame of the machine between the shaft 13 and the bar I, and K K are spur-pinions fixed upon a shaft L, which is journaled inside the case D, and which is rotated by mechanism hereinafter described, so as to advance the machine along the shaft E as the work'progresses.

M is an open-front box or stand fixed upon the platform N and adapted to receive the sacks after they have been filled.

O is a horizontal plate, the edge of which stands in such position above the box M that when the sacks are set into the box one side of the cloth, which is to be stitched above the level of the material within the sack, will rest against the plate 0. The other side is pressed closely against the first side, and the mouth of the sack is compressed against the plate 0 by means of the arms P, which are fixed to vertical shafts Q, journaled on each side of the box M, and by the rotation of the shafts Q the arms I? are compressed against the cloth which projects from the upper part of the sack, thus holding it firmly between these arms and the plate 0.

The shafts Q have pinions B upon their lower ends, and these engage with corresponding gears or pinions S, which are mounted upon a shaft T, this shaft being suitably journaled beneath the platform N. Upon this shaft is fixed the lever-like attachment or cam U, and a cord or ohainV connects this lever with the treadle WV, so that when the foot is placedupon the treadle it acts through the cam U to rotate the shaft T, and this shaft acts through the gears R and S and the vertical shafts Q so as to turn the arms Pfor the purpose of clamping the mouth of the sack, as above described.

Then the treadle is depressed, the edge of it falls into a groove or notch X in a pivoted swinging arm Y, which holds it down and retains the parts in position until the sewing is completed, after which it is disengaged by pressing the arm Y backward, so as to release the edge of the treadle. This is conveniently done by means of a foot-block Z, which is attached to the lever Y for the purpose.

As the thickness of that portion of the sack which is to be clamped between the plate 0 and the arms P may vary by reason of seams or by a portion of the contents of the sack being caught between the clamps, it is necessary to operate the clamps by yielding or adjustable pressure, so that one may close more or less than the other, as may be necessary. This is effected by means of the springs a, which surround the treadle-shaft T and have their inner ends secured to the fixed collars h. The outer ends of these springs are connected with the pinions S, which turn loosely upon the shaft T. Outside of the pinions S are fixed the adjustable collars c by means of set-screw d, and an arm e, which is fixed to the hub of each of the pinions S, extends over the collar, so as to strike against the pin or screw (Z. The springs a are coiled by tur'nin g the gears S backward until the springs have a sufficienttension, and the collar 0 is turned until the screw (1 is brought into contact with the arm 6, when the collar is fixed in place by means of the set-screw. The tension of the spring will then keep the arm 0 pressing against the screw (Z, and the pinions S will have a resistance which depends upon the amount of tension given the spring. This resistance is sufficient, so that when the treadle V is depressed the pinions S will act upon the pinions 1% immediately, and thus turn them, the shafts Q, and the clai'npingarms P.

If there were no tension upon the springs a, it would be manifest that a portion of the rotation of the shaft T would be consumed whenever the treadle was depressed in winding the springs up before they would have strength .enough to transmit their force to the vertical shafts, and this would be objectionable on account of the short movement of the treadle. 3y winding the springs up until a sufficient tension is produced to operate the parts this difficulty is avoided. At the same time, if one of the clamps P should encounteran obstruction or a thickness in the sack greater than that ben eath the other clam p, it would be manifest that the spring a would by its flexibility allow the shaft T to continue its rotation under the action of the treadle without any further movement of the pinions S and R upon that side, the set-screw (Z and collar 0 simply moving away from the arm or step c of the pinion, which latter would remain stationary Whenever the clamp P upon that side encountered an obstruction before being fully closed against the plate 0. The shaft T, however, would continue to rotate, and if the other arm P met with no obstruction the pinions upon that side would continue to operate until the clamp had been closed, so as to hold the cloth firmly at that side.

The sewing-machine D, as previously described,'is suspended from the shaft B, and its lower edge travels against the guide-bar I. \Vhen the machine is released from its holding device, it may be turned up aboutthe driving-shaft, so that the interior is accessible. \Nhen it is turned down in position for work, it is locked in place by means of aroller f, which is fixed upon the end of a lever-arm g, fulcrumed upon a plate 71, which is secured to one side of the machine-case D. The lever 9, being turned about its fulcrum-point, will throw the roller f behind the guide-bar I in such a manner that it travels against the lower back portion of the bar, and thus prevents the machine from swinging away from the bar. The lever is locked in place by means of a set-screw 2', the point of which enters a holej in the plate andretains it. By releasing the screw and moving the lever back the roller f will be thrown back sufficiently to allow the machine to be turned up,-as before described.

7c is the stationary arm. Zis the oscillating arm, which carries the needle-bar m an d with it the needles n. The oscillating arm Zis actuated by a pitman 0 from an eccentric or crank 17 upon the shaft G of the sewing-machine.

In the present case I have shown two needlesn, in each of which I use a different colored thread.

The looper g, which reciprocates within the case D and at right angles with the movements of the needles n, is carried upon a rocker-arm fixed to a shaft g, which is reciprocated in the direction of its length by means of the cam 7 upon the main shaft G. This shaft q is also caused to oscillate alittle upon its axis, so as to move the looper g from one side to the other of the line traversed by the needles n in making the stitch. The cam 0' is so formed as to reciprocate the looperq and to retain it in the stationary position at the proper points, so as to complete the stitch, and this looper, which is of the usual form, also carries a thread different in color from the needles n.

The position of the machine relative to the sack-holding device is such that theclamps P close the mouth of the sack just above its contents and the needles a pass through the upwardly-projecting portion of the mouth of the sack, which extends above the clamps. The presser-foot 5 comes against the upwardly-projectin g edges of the cloth, as shown, and when the main shaft 13 is rotated the sewing will commence.

On account of the position of the looper q, I have found it necessary to make the stroke of this looper very short to prevent its extending into the top of the sack, and for this reason I have been obliged to so. construct the cam r as to give this needle stationary periods in its reciprocation, so that the loops of the thread will be properly formed and taken up to form the stitch.

The reciprocation of the looper q in this class of machines is usually produced by a continuous or crank movement, and the looper has a correspondingly long motion in the ordinary construction amounting to as much as an inch and a quarter. In my device, however, the movement of the looper does not exceed fi've-eighths of an inch, and this would be insufficient to make and hold the loop, so that the two main needles would pass through it if the reciprocating motion of the looper were continuous. For this reason I have em ICC IIO

ployed a cam to move the looper insteadof a crank movement, and this cam has its groove made at two points, so as to produce no reciprocating motion of the looper.

The operation of the looper will then be as follows: It is first moved forward to the full extent of its stroke, passing through theloops which are formed by the ascent of the two needles 7%. At the end of its stroke the looper then remains stationary, while the needles 71 are withdrawn and during the time while the feed or forward motion takes place for the following stitch. A slight lateral motion of the looper then takes place, which carries it to the opposite side of the line of travel of the needles n, and the pull of the feed at the same time in the opposite direction causes a slight tension of the loop, which prevents its slipping off the looper. The looper is then drawn back a short distance by the further movement of the cam, and again remains stationary at the point at to allow the needles 71 to pass through the triangular space, which is thus formed in the loop at the side of the needle. These rests in the movement of the looperare necessary on account of the short stroke which it takes, and also because of the use of the two needles and the very small space into which these two needles must pass in their movement through the loop.

In order to advance the machine along the top of the sack as the work proceeds, I have shown a crank-pin t, which is carried by the main shaft G of the machine. This pin enters a long slot in the arm a, and by its rotation causes the oscillation of this arm, the slot being long enough to allow of the full stroke of the crank-pin within the slot. The arm 16 is fulcrumed upon or in line with the shaft L,which carries the feed-pinions K, and a ratchet-wheel U is fixed upon this shaft just inside of the lever 10. By means 'of the pawl w, which engages the teeth of the ratchetwheel 4), the shaft L is rotated, and with it the pinions K K, which engage with the bars J J while advancing the machine the proper distance for the following stitch. This advance takes place while the needles n n are out of the goods, and as it must bemade rapidly and before the needles are again carried into the goods the movement of the pawl and ratchet is effected by the cranlepin i when it is at that point within the slot in the arm to nearest to the fulcrum-point, thus giviuga rapid motion to the feed-shaft at this point and allowing a more leisurely return of the pawl-carrying arm at the other part of its stroke, when the crank-pint is at the greatest distance from the fulcrum.

It will be manifest that a friction-clutch or other feed mechanism can be substituted for the ratchet, which is here described as a representative device. 1

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, is

1. A sewing-machine for closing and securing the mouths of sacks, consisting, essentially, of a shaft, a traveling sewing-machine suspended from said shaft, a horizontallyplaced needle-bar at right angles to said shaft and providedwith reciprocating needles, astationary support for the sacks, pivoted clamps mounted in the support and adapted to swing inwardly to close the mouth of the sack, and a rack and pinion with pawl and feed mechanism, whereby the sewing-machine is advanced between the stitches, substantially as herein described.

2. In a sewing-machine, a rotary shaft having a pinion adapted to slide thereon, a sewing-machine mounted upon said shaft and havinga vertical shaft provided with a pinion which is engaged by the sliding pinion, a second pinion on the vertical shaft and a rack engaged thereby to advance the machine upon its shaft, complementary feed mechanism, and reciprocating needles, substantially as described.

3. A sewing-machine suspended upon the main driving-shaft, a pinion traveling from end to end of said shaft upon a feather and engaging the corresponding pinion upon the main shaft of the sewing-machine, a second shaft upon the sewing-machine with pinions thereon, fixed rack-bars engaged by said pinions, a feed mechanism by which the pinionshaft is revolved, so as to move the sewingmachine along upon its supporting-shaft, an oscillating arm carrying the pawls, a slot made in said armgand a crank-pin upon the main shaft of the sewing-machine extending into said slot and acting to move the oscillating arm with a variable speed, substantially as herein described.

l. A sewing-machine suspended from a driving-shaft, a traveling pinion moving upon a feather on said shaft and engaging a corresponding pinion of the sewing-machine shaft, the mechanism of which is driven thereby, stationary rack-bars beneath the suspendingshaft, pinions with a pawl and a feed mechanism, whereby they are rotated so as to travel upon the rack-bars and advance the sewingmachine, a guide-bar, against which the lower portion of the sewing-machine rests, and a lever-arm and roller adapted to swing behind and beneath the guide-bar, so as to retain the machine in position to prevent its swinging away from the guide bar, substantially as herein described.

5. The combination, with the traveling sewing-machine, of the horizontal plate against which the mouth of the sack rests, the swinging arms P, by which the sack is clamped against said plate, the shafts Q, and the pinions R, in combination with the horizontal shaft, a treadle by which it is moved, pinions S, turning loosely upon the shaft and engaging with the pinions R of the vertical shafts, and the springs a, connecting the pinions S with the shaft, substantially as herein described.

6. The combination of the traveling sewingmachine, the clamps by which the mouth of IIO the sack is closed, the horizontal shaft havmaintain a tension upon the spring, substaning the pinions S, turning loosely upon the tiaily as herein described. TO horizontal shaft, spiral spring-s surrounding" In witness whereof I have hereunto set my said shaft, having one end attached to; the hand.

5 shaft or collars thereon and the otherendat- THOS. J. DANIEIS.

taehed to the pinions, the collar 0, the set- Witnesses: screw (Z, and the arm 6, fixed to the pinion and S. H. NOURSE, projecting so as to engage the set-screw (Z and II. 0. LEE.

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