DE1049678B - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

PATENT LETTER 1 049 ANUEr _j DETAG;

B EK ANNTM ACH UiNG
THE REGISTRATION
AND ISSUE DB ¹ R
EXTENSION S CHBIFX ':

FROM GAB B THE
PATENT LETTERING:

kl. 52 a 52/03

WTERNAT, EL. D 05 h 14 September 1956

JANUARY 29, 1959 JULY 23, 1959

Obkkkin agrees with cut-out

ΙΜίίΤβ (P 16992Vn / S2 «>

The invention relates to a sewing machine with a presser foot and operated by a common lever swiveling 'edge ruler-

When sewing the corners of the collar or cuff edges, the Edge rulers are required during the sewing work, with both hands of the operator to guide the Workpiece should be free. For quilting workpieces with two layers of fabric, e.g. collars, It is also desirable to occasionally raise the presser foot to hold the fabric. Included the edge ruler should remain in its working position.

We already know a sewing machine that operates the presser foot and an edge guide can be done by a common pedal in such a way that either the edge guide alone or is raised or lowered together with the presser foot. This known device allows the lifting of the edge ruler and the presser foot without manual operation, but it does not reveal any possibility, possibility to raise the presser foot without switching off the edge guide at the same time.

In contrast, the invention consists in that a in a known manner in a plane both around a Pivot pivotable as well as perpendicular to this movement displaceable toggle bracket sp arranged is that he independently of each other when pivoting the known toggle lever of the presser lifting device and when moving the switch for an electromagnet controlling the edge ruler as well as switching both devices together or in an optional sequence. This will a device that can also be retrofitted to existing sewing machines is created, which enables the expansion and Swiveling in the edge ruler during the sewing work independently of and together with the actuation of the presser foot, which leads to a high level of work performance by the operator.

In the preferred embodiment, the toggle lever, which is provided with a bracket in a known manner, is located the switching device with one leg of the bracket on the pressure plate of the presser foot lifting device and actuates it when it is pivoted to the right.

The electromagnet provided for actuating the edge ruler can be connected by means of a Bowden cable are in operative connection with the edge ruler.

An example embodiment of the invention is shown in the drawing. It shows

1 shows a sewing machine equipped with the device in a diagrammatic representation,

2 shows a detail of the machine base plate with the edge ruler on an enlarged scale.

Control device for the edge ruler on sewing machines

Patented for: G. M. Pfaff A. G., Kaiserslautern

Karl Winz, Kaiserslautern, and Kristen Hedegaard, Gentofte (Denmark), _lfi have been named as inventors

1 with the sewing machine table frame is referred to, ao that carries the sewing machine 2, which the fabric. presser foot 3 supporting fabric presser rod 4 has. The presser bar 4 carries the presser bar 5, the force-fit via the mounted on the arm of the machine 2 double-armed lever 6, the The pull rod 7 and the double-armed lever 8 mounted in the base plate are connected to the shaft 9 stands. On the shaft 9, the angle lever 10 is fastened, which the pressure plate 11 to the knee bracket 15 wearing.

On the table frame 1, a bearing block 12 is attached, which receives an angle lever 13 rotatable in this, which carries a sliding sleeve 14 on its downward arm. At this one is a Bracket IS attached to accommodate the knee of the operator, the bracket 15 with its one Leg on the pressure plate U of the angle lever 10 rests. The sleeve .14 has a slot 16 through a pin 17 fixed in the angle lever 13 protrudes to limit movement and straight line guidance the sleeve 14 with the bracket 15 is used. The sleeve 14 is in its rest position by a spring pressed down.

On the sleeve 14, a switching piece 19 is attached, which is used to actuate a roller 20 Tersehenen Switching contact 21 is used. This is in the circuit of an electromagnet 22, which is attached to the sewing machine frame 1 and with a near the Presser foot 3 on the base plate of the sewing machine 2 arranged edge ruler 23 by a

Bowden cable 24 is connected.

The double-armed edge ruler 23 (FIG. 2) is rotatable about the collar screw 25 on the holding plate 26 attached, which is connected to the base plate of the machine 2 by screws 27. An elongated hole 28 in the

9W5Ö / 134

Claims (3)

Retaining plate 26 is used to adjust the contact between the workpiece and the edge 29 of the ruler 23. The wire rope 31 of the Bowden cable 24 is fastened in a bolt 30 rotatably arranged in the edge ruler 23, one end of which is screwed to a tab 32 of the retaining plate 26. A tension spring 33 holds the edge ruler 23 in its working position, which is determined by a stop pin 34. The Bowden cable 24 (FIG. 1) is guided in an opening 35 through the table top 1 to the magnet 22, the armature 36 of which is connected to the wire cable 31. The mode of operation of the device according to the invention is as follows: If no pressure is exerted on the bracket 15 by the operator's knee, it assumes the position shown in FIG. 1, in which the presser foot 3 rests on the workpiece. To raise the presser foot 3, the bracket 15 is pressed to the right, which takes the pressure plate 11 with it and lifts the presser foot 3 in a known manner. If the edge ruler 23 is now to be switched off, an additional pressure is exerted upwards on the bracket 15, whereby the switching piece 19 actuates the switching contact 21 via the roller 20, whereby the electromagnet 22 receives voltage, whose armature 36 the edge ruler 23 against the Swiveled action of the spring from its working position. If the edge ruler 23 is to be swiveled out without venting the fabric backing 3, this is done simply by exerting an upward pressure on the bracket 15, the switching contact 20 also being actuated by the switching piece 19 and applying voltage to the electromagnet 22. Patent scope: 1. Sewing machine with presser foot operated by a common lever, and swiveling Kantcn ruler, characterized in that a in a known manner in a plane both around ίο a pivot point as well as a knee bracket that can be pivoted perpendicular to this movement is arranged that he both independently when pivoting the known per se Knee lever of the presser lifting device and. when moving the switch for one of the edge ruler controlling electromagnets as well as both devices together or optionally Sequence switches. 2. Sewing machine according to claim 1, characterized in that the knee bracket with one leg rests on the pressure plate of the toggle lever of the presser lifting device and this at Pivoting of the bracket to the right actuated. 3. Sewing machine according to claim 1, characterized in that the for actuating the edge Hneal Serving electromagnet via a Bowden cable in working connection with the edge ruler stands. Considered publications: German Patent No. 914 458;
German abuse model No. 1 696 196. 1 sheet of drawings "US 747 / 17.1.5) {Wf 563/134 7.5P