US1048565A - Bobbin-holding device for lock-stitch sewing-machines. - Google Patents

Description

W. G. MEYER. BOBBIN'HOLDING DEVIGE FOR LOCK STITCH SEWING MACHINES.

APPLICATION FILED AUG. 10, 1905.

1,08,565, Patented Dec. 31,1912.

' UNITED PATENT OFFICE.

, WILLIAM C. MEYER, OF BOSTON, MASSACHUSETTS, ASSIGNOR T UNITED SHOE MACHINERY COMPANY, OF PATERSON,

JERSEY.

NEWJERSEY, A CORPORATION OF NEW BOBBIN-HOLDING DEVICE FOR LOCK-STITCH SEWING-MACHINES.

Specification of Letters Patent.

Patented Dec. 31,1912.

Application filed August 16, 1905. Serial No. 274,356.

To all whom it may concern:

Be it known that LWVILLIAM C. MEYER, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Bobbin-Holding Devices for Lock-Stitch Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

- provement in ferred to, is placed. loosely in the oscillatsupported in a ing shuttle and held there during the operation of the machine by a bobbin holding arm which engages the face of the bobbin and prevents its displacement. For convenience in removing and replacing the bobbin the bobbin holding arm is pivoted to a bolt bracket projected from the side of the shuttle race. By tightening the nut on the bolt the bobbin holding arm is frietionally held in place. A leather. washer under the nut is relied upon to create the arm, thus swinging it away necessary friction to hold the bobbin arm from displacement in the operation of the machine. The construction constitutes an embodiment of the invention described-in the patent'to French and Meyer, No. 424,966, from the illustrated embodiment of which, however, it diiicrs in thatthe bolt is' extended upward through bracket on the frame and the nut on the upper end is provided with a handle. The nut and bolt are threaded left-hand, so that in turning the handle to loosen the nut, after the nut has become slightly loosened, the

,friction between the parts is snflicient to enable the operator by t ing of the handle to open the bobbin holding from the bobbin so that the bobbin may be removed from the shuttle. These means for operating the bobbin holding arm to open and close it and to hold it closed have been found ineffective owing to the act that the operation of the bobbin holding arm and the holding of it in place depended upon friction between the parts, and much ditiiculty has been exerienced with this device in the use of the Rapid stitcher owing to these facts.

The objects of the present invention are to reorganize and improve the construction and operation of bobbin holding means in order to secure positively acting mechanism for opening and closing the bobbin holding arm and for positively holding said arm in closed position.

To the above ends the present invention consists in the devices and combinations of devices hereinafter described and particularly defined in the claims.

In the accompanying drawings illustrating the preferred form of the invention Figure 1 is a front elevation of the shuttle race and bobbin holding means. Fig. 2 is a plan of the same, the parts being shown as adapted to be incorporated in the machine of said Patent No. 473,870, to which for a description of the parts not hereinafter mentioned, reference may be had, and Fig. 3 is a plan of a portion of-the bobbin holding arm and its operating means.

The shuttle race 1, adapted to receive the shuttle and within the shuttle the bobbin, is substantially the same as in said patented machine. The bobbin holding arm 2 is the arm and the,

ne continued turnpivotally mounted upon the bolt 3 whicl'rfis secured in a projection from the shuttle race. A stop screw 4 provided with a set nut is screwed through a threaded aperture in the bobbin holding arm and is adapted to engage the periphery of the shuttle race and to limit the movement ofth'c bobbin holding arm toward the bobbin soas to allow sulfieicnt clearance between the bobbin and bobbin holding arm to permit the free movement of the bobbin and the passage of the thread between the parts.

Means are provided for opening and closing the'bobbin holding arm and for looking it in its closed position. To this end the bobbin holding arm is provided with a tooth or projection 5 which is adapted to enter a notch 6 in the cam 7 which is-secured to'the hand wheel shaft 8. The hand wheel shaft 8 is carried in a bracket 9 supported from the head of the machine and carries upon its upper end the hand wheel 10 which is also secured thereto. This construction is such that when the hand wheel 10 is turned to the left the shoulder 11 of the cam 7 engages the projection of the bobbin holding arm2 and swings the bobbin holding arm from the position shown in Fig. 2 to the position shown in. Fig; 3. A

- stop 12 upon the bobbin holding arm limits spiral peripheral surface of the cam 7 acts been swung into the this opening movement of the bobbin holding arm. The peripheral surface of the cam 7 is spiral inishape, the shoulder 13 being somewhat nearer the center of the hand wheel shaft. 8 -thanthe shoulder 11. 'When it is desired to close the bobbin holding arm or to-turn it from the position in which it is shown in Fig. 3 to the'position in which it is shown in Fig; 2, the hand wheel 10 is turned to the right whereupon the shoulder 13 strikes "the projection 5 and thereby turns the bobbin holding arin about the bolt 3 into the operative or closed position. The

as a wedge to force the-projection 5 in the direction to move-the bobbin holding arm toward theab obbin until it brings the stop 4 against the periphery of the shuttle race. Therefore after the bobbin holding arm has position shown in Fig,

2 it looks the bobbin holding arm against position.

holding it positively in operative It ,willbe observed that in this construction the mechanism for operating the bobbin] holder operates positively (simply as distinguished from frictionally) op n .to move the bobbin holding arm to open and close the same. v

It 'is not intended in this application to claim broadly the combination with a bobbin of a bobbin holding. arm mounted to swin engage and positively hold the bobbinzholding arm inoperative position, as that-constru'ction forms the subject-matter of the copending application of Joseph;E Thayer.

I filed February 15, 1905, Serial No. 245,697,

- which is adapted to to which by permission reference is bad. It is to' be understood that" while in the claims abobbin isreferred to as the device be held inplace by the bobbi'n holding arm, the invention is not the contemplation I the construction to limited to the use ofa-bobbin as it is within sewing machines in which the entire shuttle is held position prising a notched spiral 'faced cam the ing the toward and from the bobbin and a latch to of the'invention to apply shoulders of thenotch operating by engagein combination, a pivotally-mounted bobbin holding arm for holding the bobbin in place,

dGXlCG for v a manually operable rotatable 'swingingthe arm into and out of operative position about its pivotal support, and connections between the arm and the rotatable device arranged and constructed to lock the arm in operative position,substantially as described. a

3.., A look stitch sewing machine,'having,

in combination, a bobbin, a'normally stationary" bobbin holding arm movable from closed to open position for holding the bob bin in place, and. mechanism including a normally stationary cam engaging the bob-.- bin holding arm for moving the arm.-

, 41 A look stitch sewing. machine, having, in combination, a bobbin, a normally'stationary bobbin holding arm movable from open to closed position for holding the bobbin in place, andv mechanism including a normally stationary actuating and locking cam engaging the bobbin holding-arm and arranged to move the bobbin I holding arm' and lock it in closed position 5. A look stitch sewingmachine,' having combination, a bobbin, a normally stationary bobbin holding arm for holding the bobbin in place,-'a nd mechanism for moving -thefarm toward and from its closed position including a normally stationary cam engagarm and acting to lock the arm in closed position.

6. A lockstitch sewing machine, having, I

in combination, a bobbin,

tending transversely of the plane: of movementof the arm,

.tionary movable cam arranged to engage the arm on the opposite side of the pivot from the bobbin and lock the arm inclosed posi- Intestimony whereof lafiix my signature, in-.;pre'sence;of.two witnesses.

. a WILLIAM enema I Copies of this patent may be obtained forflve cents each. by-adaressmg the fcommisaioner of Patents, I i [Washington .D. C." I

a pivotally mount-u ed bobbimholding \arm,'arotary shaft ex-- and a normally stationary cam carriedby the shaft arranged to engage" the opposite side of the pivot from the bobbin'and lock 'thevarm in closed having,

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