Patent GB-191004950-A (GB)
Title: An Improvement in the Arrangement of the Governing Mechanism of Electrically or Mechanically Driven Machines with Variable Numbers of Revolutions.
IPC: G05D13/00
Filed: 1910-02-28
Granted: 1911-02-09
Abstract: 4950. Maschinenfabrik Oerlikon. June 28, 1909, [Convention date]. Driving - arrangements. - The governing- mechanism of a prime mover which is to have a periodically varying speed is given a variable movement, in advance of the speed change that it is to produce, in order to eliminate the effects of the momentum of the driven masses. The invention is described in connexion with a ring spinning-machine. In the form shown in Figs 1 and 2, the lever 2 is connected to the governing-mechanism by a band 3, and is moved up and down by a cam 1, which is driven by a differential bevel train 4, 5, 6. The wheel 5 is oscillated on the shaft 7 by a disk 8, which makes a revolution during each spinning period, and the wheel 6 and cam 1 are rigidly secured together. Hence the cam gives the lever 2 of the governing-mechanism an advance or retardation depending on whether the wheel 5 is swung in a direction similar or opposite to the rotation of the wheel 6. By suitably shaping the disk 8, the governing - mechanism can accordingly be given an advance movement proportional to the retarding effect of the momentum of the machine. An alternative form is described in which the bevel train is replaced by a sun-andplanet train. In the form shown in Fig. 5, the governor cord 17 is attached to a lever 10, and passes over a pulley 12 on a lever 11, which is so weighted at 13 as to remain in any position in which it is placed. A rod 14, attached to the oscillating lever 10, carries two abutments 15, 16 which set the lever 11 over at certain points in the oscillation. It follows that, as the lever 10 oscillates, any point on the cord reverses its direction of travel in advance of the reversal of the lever 10. The amount of the advance may be controlled by altering the amplitude of the oscillation or the positions of the abutments 15, 16. A modification of this form is shown in Figs. 6, 7, and 8, as applied to rocking the brushes of a motor driving a ring spinning-machine. In the brush-controlling device, Fig. 6, the arms 10, 11, corresponding to the arms of Fig. 5, are carried by wheels driven through worms from pinions 32, 31, the latter of which is rigidly attached to a sprocket pulley 25. The abutments 15, 16 of Fig. 5 are replaced by pins 34 in the loose pinion 32 which contact with a pin 35 in the worm-shaft 33. The brushes of the motor 18, Fig. 8, are rocked by the cord 17, and the controlling-device is actuated by a weighted chain 21 which is attached to a rod 22, carrying a ring frame, and passes over a pulley 24, as shown in detail in Fig. 7. The pulley is eccentrically mounted, so that the net lift of the chain grows greater at each step as the frame rises. When the cop botttom has been formed, an arm 26 abuts on the rod 27, which carries the pulley 24, and the latter is raised and held up at each step by a latch 28. Towards the end of the spinning period, a rod 29 draws over the carrier of the pulley and the motor speed is slowly reduced