US808502A - Bobbin-ejector for sewing-machine. - Google Patents

Description

No. 808,502. PATENTED DEC. 26, 1905.

P. ANSOHUTZ. I

BOBBIN EJEGTOR FOR SEWING MACHINES.

APPLICATION FILED J'AN.10, 1905 E y-. Mm

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""No. 808.502. PATENTED DEC. 26, 1905.

P. ANSOHUTZ.

BOBBIN BJEGTOR FOR SEWING MACHINES.

APPLICATION FILED JAN. 10. 1905.

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uNrTnn STATES PATENT orrion.

PAUL ANSOHUTZ, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO GEORGE BIOKELHAUPT, OF NEW YORK, N. Y.

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed January 10 1905- Serial No. 240409.

dle; and it relates more particularly to cer-' tain mechanism for readily ejecting the bobbin and for holding the same in place in the operation of the mechanism.

I have shown my invention as applied to a sewing-machine such as is disclosed in my Letters Patent No. 766,130, "ranted July 26, 1904; but this is not essential, as it can be used in connection with almost any type of double-thread machine wherein a bobbin is employed, and so I do not limit myself to any such particular use.

"f. In the drawings illustrating my invention and forming part of this application, Figure 1 is a side elevation of a sewing-machine embodying my improvements and disclosing so much of the stitch-forming mechanism as is necessary to understand the present improvement. This mechanism, however, is similar to that of the aforementioned patent and need not be particularly described. Fig. 2 is a side view of the bobbin-ejector mechanism, similar to Fig. 1, but showing the bobbin-case in its open position ready for the insertion of a bobbin. Fig. 3 is a top view of the same mechanism, showin the bobbin (in dotted line) in place and he d by the bobbin-case. Fig. 4 is a similar View to Fig. 3, but showing the bobbin removed and the parts open for the insertion thereof. Fig. 5 is a side elevation of the plunger for ejecting the bobbin. Fig. 6 is an enlarged detailed view of the top portion of the bobbin-case looking in the direction of the arrow in Fig. 7. Fig. 7 is aside elevation, and Fig. 8 an end view, of the bobbin-case. Fig. 9 is an enlarged side elevation of said bobbin-case looking in the direction of the arrow at the bottom of Fig. 6, and Fig. 10 is a similar enlarged detailed view of the bobbin-case, looking in the direction of the arrow at the side of Fig. 6. Figs. 6, 9, and 10, inclusive, illustrate more particularly the automatic and practically self-threading tension device, which will be more particularly described hereinafter.

In the drawings, as has been stated, Fig. 1

shows an end elevation of a complete mechanism, the essential parts indicated being a reciprocating needle-bar 1, carrying the needle 2, a presser-foot 3, and a feed mechanism 4. Below the needle-bar is located a bobbin-carrying device comprising a bracket or frame 5, a recess 6 for the bobbin-case 7, which latter is a substantially ring-shaped member having a flat face or cross-bar 8 at its upper end and having a recess 9 for the insertion of the bobbin 10. (Shownin dotted lines in Fig. 3.) The bobbin-retaining mechanism comprises a hinged bobbin-retainer or arm 11, pivoted to a suitable portion of the bracket or frame 5, which retainer has a foot or contact-surface 12, adapted to bear against the bobbin. A bell-crank lever or pivoted arm 14 is also movably mounted in the bracket, and one end ofit is connected by a link 13 with the bobbin-retainer, and the other end, which is rounded, engages with a slot'on the stem of the bobbin-ejector 18, as will be hereinafter more particularly described. The bell-crank lever has a knuckle or projection 17 adjacent to its pivoted portion, and this knuckle is adapted to contact with a longitudinally-sliding rod 15, which is pressed inwardly by the spring 16 and serves to control the bobbin carrier and ejector and to retain the parts in either one of the positions shown in Fig. 3 and Fig. 4. It will be seen that the bearing-surface of the retaining-arm 11 is slightly curved, and this will be found desirable, especially in cases where the bobbin has a slightly-convex shape. The plunger or bobbin-ejector 18 is mounted in the bracket 5, so as to be seated in a small recess 19 beyond the bobbin when the latter is in place, and an arm 20 on the lever 14, havin its end engaging the slot 21 in the ejector, Forces the ejector against the bobbin, and thereby forces the latter out of place whenever the retainer 11 is swung back to the position shown in Fig. 4. The plunger is of such size as to readily pass within the opening inthe bobbin-case 7 and in moving under the influence of the lever 14 forces the bobbin sufficiently out of the bobbin-case to eject it entirely therefrom.

When the bobbin is in place andit is desired to put the machine in condition for sewing, the thread must be placed underneath the tension device, which is shown in Figs. 6 to 10, inclusive. The preferred form of this tension device comprises a spring 22, secured to the face of the cross-bar 8 of the bobbincase 7 (the parts being omitted in Figs. 7 and 8 for the sake of clearness) by any suitable means, such as the screw 23, and a small lug or hook 24 is attached to the lower part of said cross-bar to assist in inserting and retaining the thread in the desired position. The device is easily threaded, it being only necessary to pass the bobbin-tl1read through the opening between the hook 24 and the edge 25 of the bobbincase, then over the said hook and under the spring 22, where it enters the small recess 26 (see Fig. 6) and is fed therefrom under the propertension in the operation of the machine. Upon the passage of the needle-thread around the bobbin and bobbin-case, as occurs in the operation of the machine, the free end of the bobbin-thread as it passes from the recess 26 is looped by the needle-thread and drawn up, and thus becomes part of the stitch. I-have omitted to illustrate in the drawings either of the threads mentioned, as the operation thereof will be readily understood from an examination of the patent previously men tioned and as such illustration would but serve to confuse the mind.

It is obvious that many modifications and changes may be made in my invention with out departing from the spirit thereof, and I do not limit myself to the particular forms shown and described; but I What I claim, and desire to secure by Letters Patent, is

1. In a bobbin-ej ector for sewing-machines, the combination of a movable bobbinretain ing device, a movable ejector, connecting means between said retaining device and ej ector and a spring-operated mechanism associated with the connecting means for controlling and holding'said bobbin-ejector and retaining device, substantially as described.

2. In a bobbin-ej ector for sewing-machines, the combination of a pivoted bobbin-retaining device, a movable bobbin-ejector, con-' necting mechanism between the same, 1ncluding a pivoted lever having a knuckle thereon, and a spring operating in conjunction with the knuckle and lever to control said retaining device and said ejector, substantially as described.

3. In a bobbin-ej ector for sewing-machines, the combination of a movable bobbin-retain ing device, a plunger-operating ejector normally forming a part of the bobbin-retaining means, connecting means between said retaining device and said ejector, and a springoperated mechanism associated with the connecting means for controlling said retaining device and said ejector, substantially as described.

4. In abobbin-ej ector for sewing-machines, the combination of a pivoted bobbin-retaining device, a plunger-operating ejector, a bellcrank lever one end of which engages a slot in the stem of the ejector, means connecting the other end of the bell-crank lever withthe retaining device, and springoperated means for controlling said retaining device and ejector, substantially as described.

5. In abobbinejector for sewing-machines, the combination of a pivoted bobbin-retaining device, a plunger-operating ejector, a bellcrank lever one end of which engages a slot in the stem of the ejector, means connecting the other end of the bell-crank lever with the retaining device, a knuckle on said bell-crank lever, a plunger-rod contacting with said knuckle and a spring engaging with said rod, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

PAUL ANSCHUTZ. Witnesses: I

HENRY M. TURK, ADoLPH -F. DINSE.

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