Drawing frame

Details Drawing frame Drawing frame

1982-08-18

1984-11-06

Rimrodt, Louis

Textiles: fiber preparation

Working

Drafting

19258, 19293, D01H 532

Patent

active

044803559

ABSTRACT:
A drawing frame has an electric driving motor (M) and a main shaft (H), which is drivingly connected to several driven rollers (W1-W4, W1'-W4') in the two draw heads (11) of the drawing frame. Between the motor (M) and the main shaft (H) are arranged a belt adjusting gear mechanism (V and HO) and a clutch (K). The transmission ratio of the adjusting gear (V and HO) is automatically gradually reduced from a maximum value to the operating value, so that the main shaft (H) is smoothly accelerated.
Cut-off devices are provided for automatically stopping the frame when a disturbance of any kind occurs. The cut-off devices switch off the electric motor (M), release the clutch (K) and actuate a brake (B) which acts upon the main shaft (H), and also an adjusting member of an adjustable disc (V) of the belt-adjusting gear (V and HO). The brake (B) can be relatively small, as it does not have to decelerate the uncoupled motor (M). The motor (M) and the adjusting gear (V and HO) run on for a short while as a result of their inertia. Within this time, the adjusting gear (V and HO) is automatically set to its maximum transmission ratio without any difficulty, so that it is ready when the drawing frame is restarted.

REFERENCES:
patent: 3869759 (1975-03-01), Savageau et al.

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