Control system for circular knitting machines and the like
AssigneeBilli, S.p.A.
InventorGiorgio Billi
Life of this patent
Estimating the term…
Abstract
Rotations of a circular knitting machine are counted and encoded into electrical signals. After a prescribed number of revolutions a programmer and program indicating disc signal a switching mechanism to shift a cam drum to the next position in the pattern. A first circuit is provided for operating the needle cylinder at a slower speed during the aforesaid shifting operation, and a second circuit is provided for running the machine at maximum and intermediate speeds during the knitting operation in response to a preselected pattern. The programmer includes two types of output signals for controlling the production of fabric according to type or size.
Claims14
A control system for circular stocking machines and the like of the type including a needle cylinder, a programming cam drum, and control means to modify the cylinder speed between a minimum and a maximum rate, said system including:
- a. a counting means for counting needle cylinder revolutions and generating pulses responsive to a prescribed number of revolutions, said counting means including a zero setting means;
- b. a programming unit receiving the pulses from said counting means and including programming means for transmitting output signals responsive to a prescribed number of pulses from said counter;
- c. a rotating member integrally connected with said programming cam drum and including electrical contact means, and a fixed member including a plurality of conductive arcuate segments successively engageable by said electrical contact means of said rotating member, said arcuate segments having output lines operatively connected to said programming unit to indicate drum position to said programming unit, said segments corresponding in length to the relative length of movements of said cam drum between successive positions;
- and
- d. an assembly of coincidence circuits, receiving the output signals from said programming unit and receiving the output signals from said arcuate segments, said coincidence circuits causing an output signal after a programmed number of revolutions for each stopping position of said cam drum have occurred, so as to initiate the advance of said cam drum and said rotating member.
A control system for circular stocking machines of the type including a needle cylinder, a programming cam drum, and speed control means to adjust the cylinder speed, said system including
- a. counting means operatively cooperating with said cylinder to count the rotations thereof and generate electrical pulses responsive thereto;
- b. program means responsive to a prescribed number of pulses from said counting means for generating output signals, said program means being selectively variable to be responsive to a selected number of pulses from said counting means to generate output signals;
- c. cam drum position indicating means for generating output signals responsive to said prescribed drum positions;
- d. electronic gate means receiving output signals from said cam drum position indicating means and said program means and delivering output signals responsive to prescribed conditions;
- e. cam drum control means receiving signals from said gate means and initiating the advance of said cam drum;
- and
- f. electronic speed programming means operatively connected to said speed control means for reducing said cylinder speed to a minimum during the advance of said cam drum.
Dependencies are inferred from the claim text.