DE11700C - Innovations in sewing machines - Google Patents

Description

1879.

Class 62.

GEORGE BENSON in BELFAST (Ireland). Innovations in sewing machines.

Patented in the German Empire on November 29, 1879

The innovations relate to devices on sewing machines to a French To create a seam or a hem stitch and consist of:

i. the curved disks with inclined planes, which means that the needle can move sideways and the work to be hemmed receives its forward and backward movement as well as its progressive movement;

: 2. from the guide F for the needle bar G, which moves sideways on fixed guides H in such a way that the needle continuously goes through the work in a vertical direction, while the shuttle basket remains stationary.

Fig. 1 is the rear view, Fig. 2 is a top view showing the innovations in their arrangement to the frame of the sewing machine. Fig. 3 is a side view, Fig. 4, 5 and 6 show the gear A ¹ with the Curvennuth B, the inclined planes cc ¹ c ² c ³ (C) and the thumb wheel D in front and side views and cross-section. Fig. 7 shows the stitch formation.

A drive wheel A on the axis of the sewing machine drives gear A ¹ . The latter is made in one piece with the thumbwheel D and rotates on a pin A ² , which is fixed in the frame. B is a curve in the rear surface of the gear A ¹ , in which a small roller B ¹ attached to the end of the lever B ² moves. The lever B ² oscillates on a pin B ³ attached to the frame. B * is a slot at the end of the oscillating lever B ¹ through which the threaded pin B ⁵ passes. This pin B ⁵ is provided with a wing nut to allow adjustment and is screwed into the connecting arm B ^s.

A pin B ¹ goes through the opposite end of the arm B ^s through a hole in the frame and is screwed into a tab on the side of the guide F for the needle bar G.

F is the guide for the needle bar G, which is a. receives lateral movement, and H the fixed guide for the movable Nadelstangenführerimg F. The needle bar G receives its up and down movement by the lever /, the end 7 ^{1 of} which is provided with a slot in which the pin g of the needle bar G runs.

C, Fig. 4, is the front surface of the wheel A ¹ provided with the inclined planes cc ^x c ² c ³ . C ¹ is an adjustable pin that goes through the lower end of arm C ² to face C of wheel A ^1. The arm C ² is made in one piece with the oscillating shaft C ³ . C * is an arm which is attached to the opposite end of the oscillating shaft, runs under the guide rod C ⁵ and is held in contact therewith by the flat spring C ^s. D is a thumbwheel, which towards the end _Z? ^{3 of} the angular pusher foot D ¹ presses to lift the same. The pusher foot D ¹ oscillates around the pin D ² . K are screw locks to prevent loosening of the screws, which serve as pins of the shafts. The stitch formation takes place in the following way:

The drive wheel A causes the wheel A ¹ to rotate in the direction shown by the arrow in FIG. 1. In the position shown in the drawing, the needle is about to execute a stitch. The pin C ¹ has passed the inclined plane c and slides on the plane c * during the further rotation and execution of the stitch; During this time the roller B ¹ slides in the part b of the curve B, consisting of two circular grooves, which has the largest radius.

The lever B ² remains in its position during this rotation while the needle executes the stitch shown in FIG. If the pin C ^{1 has reached} the inclined plane c ¹ by a partial rotation, at the same time the presser is lifted by the thumb d of the thumb wheel D , the pin C slides up the plane c ¹ and thereby divides the lever C ^{2 of} the shaft C ³ and the lever C ^{1 with} an oscillating movement.

This oscillating movement is ^{communicated to the guide rod C 5} and the presser foot is lowered again. During further rotation C ^{1 2} slides down the inclined plane c ² whereby the guide rod receives a backward movement and B ¹ from B to B ¹ slides to the lever B a

to communicate an oscillating movement and thus to move the needle bar guide F to the side by means of the connecting arm B ^e. The stitch ι to 2 shown in FIG. 9 is formed by these two movements. After this stitch, the inclined plane c ^{3 has} reached the pin C ¹ . While this slides under the pin and lifts the latter, the lever B ² , whose roller B ^{1 runs} in the curve b ¹ , remains in its position, the fabric is only moved backwards by D , whereby the stitch 2 to 3, Fig. 10 , is formed; In this case, the needle bar guide F is not moved, but rather the needle is only lowered and raised in order to execute a stitch.

After another partial turn has been carried out, the pin C ¹ goes down the inclined plane c , the presser notifying the fabric of a forward movement; The roller B ¹ slides from b ¹ to b, as a result of which the needle bar guide and, with it, the needle is communicated a lateral movement. The stitch 3 to 4, FIG. 11, is formed by these two movements.

With the next partial turn the presser foot is raised by the thumb d , at the same time moved backwards and lowered by C ¹ , which slides down at c , so that in the next partial turn the fabric is moved forward by the same amount, the needle bar is moved sideways and a stitch like 1 to 2 can be formed, Fig. 12.

Claims (2)

P a tent-An Proverbs: 1. The wheel A ¹ with the inclined surfaces cc ¹ , c ² c ³ , the surface c * and Nuth or Curve B, in combination or in one piece with the thumb wheel D. 2. The lever combination moved by the thumb wheel I) and the wheel A ¹ in connection with the guides F and H of the needle bar G. For this purpose 2 sheets of drawings.