US1769865A - Bobbin remover - Google Patents

Description

July 1, 1930. H. M. STEPHYENSON BOBBIN REMOVER Filed June 20, 1927 lnven tor Hugh Mstephensgn b H Hi s AU.

' struction that the bobbin can be quickly and readily removed by manipulation of the Patented July 1, 1939 FFECE HUGH.M. STEPHENSON, 0F FORT WAYNE, INDIANA, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A COB-EORATION OF NEW YORK 30:31am nnivrovnn Application filed June 20,

My invention relates to sewing machines, and more particularly to devices for facilitating the removal of the bobbins therefrom.

In sewing machines as heretofore constructed in which the bobbin case has been arranged below the top of the bed-plate, it has been the practice to provide a throat or opening in the bed-plate adjacent the bobbin case support so that the bobbin case could be removed for rewinding the bobbin which is retained therein. During the operation of such machines this opening has been closed by the throat-plate which forms a smooth surface across the top of the bed-plate of the machine for supporting the material being sewn. In rewinding the bobbins in these machines it has been necessary for the operator to remove the throat-plate, reach below the bed-plate, release the bobbin retainer, and then remove the bobbin case containing the bobbin, so that the latter could be removed. As the bobbin must frequently be rewound these several operations take up a good dealof time and interrupt the operation of the machine. Moreover, when the operator reaches below the bed-plate to release the bobbin retainer his hand obscures the bobbin and the bobbin retainer from view so that he frequently drops the bobbin which occasions further delay and annoyance.

An object of my invention is to provide a throat-plate for these machines of such conthroat-plate, so that the above-mentioned difficulties will be eliminated.

My invention will be more fully set forth in the following description referring to the accompanying drawing, in which Fig. 1 is an end elevation of a sewing machine embodying my invention, partly broken away to more clearly illustrate the relation of parts; Fig. 2 is a perspective view of a portion of'the bed-plate of the machine, showing the latch for thethroat-plate and the bobbin case retainer; Fig. 3 is a perspective view of the throat-plate in the position in which a projection thereon engages the bob- .bin case; Fig. 1 is a sectional viewof the 1927. Serial No. 199,880.

bobbin case and the projection on the throatplate in the position shown in Fig. 3; and Fig. 5 is a sectional view of the bed-plate showing the throat-plate tilted and in engagement with the bobbin case.

Referring to the drawing, the sewing machine in connection with which I have il lu'strated my invention comprises a bedplate from which extends an overhanging arm 11 for supporting a needle bar 12, takeup 13 and presser foot 14 which is attached to the presser bar 14*. sewn is fed through'the machine by the usual form of feed-dog 15 which is supported on the bed-plate 10 and actuated by any suitable mechanism. The thread is passed through the material being sewn by a needle 12 which projects the thread below the bedplate adjacent a loop-taker 16. The looptaker is supported in suitable bearings beneath the bed-plate 10 and is operated in the necessary timed relation to the needle 12 by suitable mechanism not shown. taker 16 passes the thread loop around a bobbin case 17 and forms the stitches during the operation of the machine in the usual manner. The bed-plate is provided with a throat or opening 1O therein adjacent the feed-dog 15 so that ready access may be had to the bobbin case 17. During operation of thesewing machine the material being sewn is supported adjacent the feeddog by a throat-plate 18 which is retained in alignment with the top of the bed-plate 10 as shown in Figs. 1 and 2.

In accordance with my invention the throat-plate 18 is provided with means for facilitating removal of the bobbin from the loop-taker when the throat-plate is removed from the machine. In the present embodiment of my invention this is accomplished by providing means for forming a connection between the throat-plate 1S and the bobbin case 17 in response to moving or tilting the throat-plate relative to the bed-plate 10. In order to do this I form a dovetail groove 24? in the bobbin case 17 which extends from the periphery thereof around the central opening 21 formed therein. The plate 18is pivotally supported at in the open- The material being The looping 10, and is provided with a boss 22 car rymg a projection 23 having a chamfered portion 24 on the end thereof which conforms to that portion of the groove 24 adjacent the opening 21. The chamfered portion 24 of the rojection 23 is so arranged "relative to t e bobbin case 17 when the latter is within the loop-taker 16 that movement of the plate 18 about its pivotal sawed-20 will move the chamfered portion 24 of the projection 23 through an are about the pivotal support 20 and into the roove 24. The bobbin case extends within the loop-taker so that moving the chamfered portion 24 into the groove 24 merely forces the bobbin case against the wall of the loop-taker without dislodging the bobbin case therefrom. The groove 24 is widened near the periphery of the bobbin ,case so that the chamfered portion 24 can be readily moved thereinto over the edge of the bobbin case and into a narrowed portion. of the groove around the opening 21 to i which .it conforms. The projection 23 is provided with a central opening in which a ball 25 is'retained so that it slightly projects beyond the end ofthe cham ered portion 24 and is yieldedly retained in this position by a spring 26 against the wall of the reduced end 23 of the opening. It will now-beclear that when the plate 18 is tilted fromthe position shown in Fig. 1 to the position shown in Fig. 3 that the chamfered portion24of the projection 23 will be moved into engagement with the groove 24, and

that when it reaches the end of the groove the ball 25 will be snapped into the opening 21 in the bobbin case and the latter thereby latcbedto the projection 23 so that the bobbin case can be removed from the'machine by manipulating the plate 18. The bobbin case is retained in place during this operation by the side walls of the loop-taker and an Farm 19 extending therefrom into an arcuate recess .19 formed in the side of the thmat'plate 18, as shown in Figs. 1, 2 and 5,whichpermits'tilting of the throat-plate without moving 'thedoveta-il groove 24 in the bobbin ease outof the path of movement of the chamfered portion 24. During ordinary operation of the sewing machine the 15KB 18 is retained in alignment with the Eedqdate 10 by a bracket 27 which is supposted from the bed-plate at 28 and has an openin 29 therein into which the ball 254's f0 by thespring 26 when the plate 18 is noved into alignment with the top of the bed-plate 10.

.When the sewing machine is being operated the plate 18 is pivotally supported in the opening 10 at 20 and retained in place by the bracket 27. In this position of the plate 18the arm 19 holds the bobbin case 17 in the proper position for sewing. If it is deslredto remove the bobbin for rewinding,

the end of the plate 18 adjacent the boss 22 is depressed which snaps the ball 25 out of the opening 29 in the bracket 27, but does not move the bobbin as the arcuate recess 19 permits the throat-plate to move relative to the arm 19 on the bobbin. The plate 18 is depressed far enough to bring the chamfered portion 24 of the projection 23 into the groove 24 to such position that the ball 25 is snapped into the opening 21 in the bobbin case 17 which forms a connection between the plate 18 and the bobbin case 17, as shown in Figs. 3, 4 and 5. In order to move the plate 18 out of engagement with the pivotal supports 20 it is tilted from the position shown in full lines in Fig. 3 about the projection 23 to the position shown in dotted lines, which brings it into alignment with the slot 10". The late is then moved laterally into the slot withdrawing the bobbin case 17 longitudinally out of the looptaker so that the plate and the attached bobbin case can be readily raised above the bedplate through the opening 10 and slot 10". The bobbin is removed from the bobbin case and rewound in the usual manner and is then replaced therein. The plate 18 with the attached bobbin case is then projected below the bed-plate 10 through the openings 10 and slot 10 and brought into the position shown in dotted lines in Fig. 3 which moves the bobbin case in place within the looptaker16. The plate 18 is moved into the position shown in full lines in Fig. 3 engaging its pivotal supports 20, then swun on its pivotal supports 20 from the position shown in full lines in Figs. 3 and 5 to that shown in Figs. 1 and 2, which disengages the chamfered portion 24 from the bobbin case 17 ,the latter being retained by the side wall of the loop-taker during the movement of the chamfered portion 24 out of the groove 24'. In bringing the plate 18 into this position the ball 25 is snapped into the opening 29 in bracket 27 so that the plate 18 is retained in alignment with the top of the bed-fplate 10. If the throat-plate is removed rom the bed-plate of the machine separately from the bobbin case, as has been usual heretofore, the arcuate recess 19 will disengage the arm 19, thereby releasing the bobbin so that itcan be removed manually. Moreover when the bobbin and throat-plate are replaced in the machine in the position shown in Figs. 1 and 2, the arm 19 will engage the -recess 19 in the throat-plate and retain the bobbin in position for sewing.

In view of the foregoing it will be seen that I have provided an improved bobbin remover by means of which the bobbin case can be readily removed from the loop-taker by manipulation of the throat-plate of the sewing machine.

Although my improved bobbin remover is disclosed in connection with a rotary center use.

bobbin sewing machine, it will be apparent to those skilled in the art that it is also applicable to sewing machines of other types. I desire it to be understood, therefore, that my invention is not limited to the particular arrangement shown and described, and I intend in the appended claims to cover all modifications which do not depart from the spirit and scope of my invention.

hat I claim as new and desire to secure by Letters Patent of the United States, is

1. In a sewing machine having a bedplate, a removable bobbin, a removable plate carried by said bed-plate, and means for connecting said bobbin to said plate in response to movement of the latter relative to the former so that said plate and said bobbin can be removed from the machine as a unit.

2. In a sewing machine, having a bedplate provided with an opening, a movable plate, means for supporting said plate in the opening in said bed-plate, a removable bobbin supported adjacent said opening, and means for connecting said bobbin to said throat-plate in response to tilting the latter on said support in order to facilitate the removal of the bobbin from the machine.

3. In a sewing machine having a bedplate provided with an opening, a removable bobbin case supported adjacent said opening, said bobbin case having a recess therein, a throat-plate having a projection thereon conforming to the shape of the recess in said bobbin case, means for pivotally supporting said throat-plate so that it can be removed to bring said projection into engagement with the recess in said bobbin case, and a latch for retaining said projection in the recess in said bobbin case in order to facilitate removal of the latter from the machine.

4:. In a sewing machine having a bedplate, a removable bobbin, means for sup porting said bobbin, a movable plate arranged in an opening in said bed-plate, means on said plate for retaining said bobbin in said support and for releasing said bobbin in response to moving said plate so that the bobbin can be readily removed from the machine.

5. In a sewing machine, a removable plate, a removable bobbin, a support for said bobbin, means for engaging said bobbin to retain the same in said support, and means on said plate for connecting said bobbin thereto in order to facilitate removal of the bobbin from the machine.

6. In a sewing machine, a removable plate, a removable bobbin case, a support for said bobbin case, means on said plate for engaging said bobbin case to retain the same in said support, and means for connecting said bobbin case to said plate in response to movement of said plate in order to facilitate the removal of the bobbin case from the machine.

7. In a sewing machine having a bedplate provided with an opening, a removable bobbin case, a support for said bobbin case adjacent the opening in said bed-plate,

a throat-plate, means for supporting said throat-plate in the opening in said bed-plate, said throat-plate having means thereon for engaging said bobbin case to retain the same in its support when said throat-plate is in the opening in said bed-plate, and means on said throat-plate for connecting said bobbin case thereto.

8. In a sewing machine having a bed-plate provided with an opening, a removable bobbin case, a support for said bobbin case adjacent the opening in said bed-plate, a throat-plate, means for supporting said throat-plate in the opening in said bed-plate, said throat-plate having means thereon for engaging said bobbin case to retain the same in its support when said throat-plate is in the opening in said bed-plate and for disengaging said bobbin case when said throatplate is removed from said bed-plate, and means for connecting said bobbin case to said plate in response to the tilting of said throat-plate relative to said bed-plate in order to facilitate removal of the bobbin case from the machine.

In witness whereof, I have hereunto set my hand this 16 day of June, 1927.

HUGH M. STEPHENSON.

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