Patent GB-815291-A (GB)
Title: Thread covering machine
Inventor: MCKAY ALAN GRANT
IPC: D02G3/32
Filed: 1955-02-22
Abstract: 815,291. Thread-covering machines. LASTEX YARN & LACTRON THREAD Ltd. Jan. 30, 1956 [Feb. 22, 1955], No. 5206/55. Class 109 A thread covering machine comprises means for rotating a core thread supply package, means for rotating a finished yarn take-up package, means for rotating nip rolls located therebetween, at least one electric motor located between the core thread supply and the nip rolls and provided with a hollow spindle adapted to carry a package of covering thread and to wrap the covering thread from the package on to the core thread passing through the spindle and a controd rod movable to any one of at least four positions to set up any one of the following operating coriditions, (a) rotation of the spindle or spindles alone, (b) rotation of the spindle or spindles and movement of the core thread from the supply package to the take-up package (c) stoppage of the core thread movement and braking of the spindle or spindles, (d) stoppage of the core thread movement and disconnection of electric supply to the motor or motors. In the arrangement shown core thread is drawn by the nip rollers 22, 23 from a supply package resting on a lower driven roller 18 through the hollow spindled motors 16 where the core thread is covered first in one direction and then in the opposite direction with a covering, thread from packages mounted on the motor spindles. The covered thread is finally taken-up on a package which is surface driven by the upper rollers 20. The core package and the take-up package are each carried in cradles such that they can be lifted from the respective driving rollers and the nip roller 23 is also pivotally mounted on a lever 24 such that it can be lifted from its driving roller 22. The supply package, the take-up package and the lever 24 are connected by links 28, 29 and 31 with a control rod 25 which operates in the manner of a joy-stick through a slotted gate such that it has up, down and lateral movements. The control rod 25 has a neutral position in which the core thread feed is halted and the motors are disconnected from the supply. Upward movement of the control rod from the neutral position causes the supply package and the take-up package and the roller 23 to be brought into engagement with their respective driving rollers and also through switch means supplies the motor 16 with A.C. current and drives the spindles. The spindle speed can be varied by altering the frequency of supply. To effect a quick stoppage the control rod is moved down and then to. one side e.g. right hand side. The downward movement disengages the supply package, the take-up package and the roller 23 from their driving means and the movement to the right effects operation of a switch which causes D.C. current to be injected into the spindle motors causing quick stoppage thereof. A position to the lelt of the horizontal movement of the control rod is also provided and in this position the spindle members can be kept running without movement of the core thread. A number of core wrapping heads may be arranged of the front and rear sides of a machine frame, the supply packages, the take-up packages, and the rollers 23 being driven by rolls mounted on common shafts driven by gearing at the end of the machine frame.