DE432280C - Mechanical drive for flat knitting machines - Google Patents

Description

GERMAN EMPIRE

ISSUED ON 30. J U LI1926

REICH PATENT OFFICE

PATENT LETTERING

- JHl 432280 - CLASS 25 a GROUP

(R 64019 VIIj25 a)

Max Riedel in Zwickau, Sa. Mechanical drive for flat knitting machines. Patented in the German Empire on April 10, 1925.

The invention relates to a mechanical drive for flat knitting machines. It has already been proposed to use hydraulic prime movers for moving the slide to use, but because of unavoidable leaks water to the Machine and knitwear can bring and a pushing and beating control result in the reverse movement of the knitting machine carriage.

According to the invention, a compressed air piston is used as the drive, for the reverse movement of the carriage at both ends of the same inevitably connected reversing valves are arranged, which through to the Working width of the needle bed adjustable stops and curves are controlled in such a way that the compressed air is gradually switched to avoid shocks during the reversing movement.

Claims (1)

The drive is shown in the drawing, and Fig. Ι shows a rear view, Fig. 2 is a side view, Fig. 3 and 4 the reversing devices. The piston rod 2 of a compressed air cylinder ι is through connectors 3 with the Carriage connected to the knitting machine 4, and through a rod 5 takes a cam shell 6 part of the slide movement. The cylinder 1 is through the taps 17 and 18 on A compressed air system is connected, and the compressed air supply can both through here Handle 25 and can be regulated by a boom 19, for example when the known contact 20 releases the lever 19. Otherwise the compressed air will depend on Direction of movement of the piston through the valves 21 connected by line 23 and 22 passed behind the piston in cylinder 1. The valves 21 and 22 are through a Sliding rod 8 connected, on which the control cams 9 and 10 are displaceable according to a scale with sliding bolts n and 12. There is now a curved shell 6 sliding on the rail 7 participates in the slide movement is before the end of the slide movement the curve 13 and 14 attacking the cam 12 depending on the direction of movement of the shell 6 the rod 8 and thus also the valves 21 and 22 gradually switch over. If z. B. according to Fig. 3 the knitting machine carriage and thus also the shell 6 soon to the end the reversal, then the cam 13 (Fig. 3) turns the cam 12 upwards, and the Compressed air supply is gradually made small by valve 22, while the air outlet is gradually blocked at valve ~ r. The carriage movement is delayed and an air cushion behind the piston elastically absorbs the impact when it is reversed. At the At the end of the slide path, valve 21 is opened a little and 22 lets the air out, until the carriage goes back and curve 15 through the cam 12 the valves 21 and 22 completely reverses. The compressed air drives the slide with full force left until the reversal takes place gradually and smoothly. The extension lever 19 is held by the induction coil so that it goes up in the event of a knot or thread breakage deflects under the action of a spring and locks the compressed air valve 18. The machine is then at a standstill quiet. The speed of the machine can be regulated with the tap 25. Patknt claim: Mechanical drive for flat knitting machines, characterized in that on a compressed air cylinder for the reverse movement of the knitting machine carriage at both ends of the same inevitably connected reversing valves (21 and 22) are arranged through stops and curves that can be adjusted to the width of the needle bed are controlled in this way that the compressed air is switched over gradually and smoothly. i ». S. ■ fB