Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
  • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
  • D04B15/78—Electrical devices

Definitions

• the invention relates to actuators for electronic selection in knitting machines such as for example V-bed flat or circular knitting machines. Background of invention
• Actuators may have a plurality of solenoids with associated rockers with projecting front ends for engaging pattern butts on jacks in tricks of a needle bed.
• the actuators are fixed with respect to the cam system and are operated at high frequenices during knitting when the actuators and jacks move at high relative speeds.
• the armature ends converge to reception places inside the respective extensions of the rockers, which extensions lie substantially in one line.
• the individual rockers are spaced to permit their movement in opposite senses when required.
• the rockers move through a dead centre position and have their movement limited by parts of the solenoid.
• Figure 1 shows a rear view of an actuator according to the invention with a lid removed;
• Figure 2 shows a section along line II-II in Figure 1;
• Figure 3 shows a side view of an individual
• the solenoids 2 have (see Figure 3) an outer bracket 8 with screw holes 10 for mounting the solenoids 2 on a plate 12, and inner brackets 14 mounting a coil 16. At the top there is a permanent magnet 18. The travel of the movable end of the armatures 6 is limited by inturned edges of the brackets 14. Control pulses are supplied to the coils 16 by a cable introduced through a hole in a lid 20.
• the lid 20 and the plate 12 with its solenoids 2 are screwed to the top of a housing 22.
• a number of rocker shafts 23 are retained in extensions 26 on the front of the housing 22.
• Rockers 24 are of a plastics material and comprise rear lever extensions 28 with recesses for receiving ends of the armatures 6, These extensions 28 are spaced sideways as can be seen in Figure 4 and are on a sleeve 30 surrounding the shafts 24, The sleeve 30 lies against a plastics bush 31 which holds the sleeve 30 in the desired position between the extensions 26.
• the sleeves 30 and bushes 31 are closely adjacent so as to substantially protect the solenoids 2 in the inside of the housing 22 from the surroundings of the housing 22.
• the actuators are compact. The space between adjacent extensions 32 and bushes 31 is small. As seen in Figure 1, two or more actuators can be mounted closely adjacent on a cam carriage 36. Each armature 8 is connected to its rocker 24 in an identical. manner so that the dynamic behaviour of the different rockers 24 is very similar. Each armature 6 is subject to the same sort of low friction with respect to its rocker 24. The rockers and armatures wear in the same manner and continue to perform similarly after prolonged use of the actuators.
• the actuators operate with only very light movable masses: the armature which is of metal but moves through a small angle and a rocker which is of ligh plastics material and moves through a larger angle.
• the magnetic fields generated by the coils are shielded off from the front of the rockers, the jacks and the needle bed by the plastics sleeves 30 and the bushes 31.
• the inlaid metal member 34 is thus not magnetised and the collection of metal dust on operating parts outside the housing 22 is reduced. Ingress of dirt into the housing 22 is equally obstructed by the sleeves 30 and bushes 31. Because of the efficient magnetic insulation of the actuator mal-function as a result of induced magnetism on operation parts of the knitting machine are avoided.
• the actuator is efficient at high cam system speeds.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10507716

Family Applications (1)

Country Status (2)

Families Citing this family (5)

Family Cites Families (6)

• 1980
  • 1980-09-08 WO PCT/GB1980/000138 patent/WO1981000730A1/en unknown
• 1981
  • 1981-03-23 EP EP19800901661 patent/EP0035513A1/de not_active Withdrawn

Non-Patent Citations (1)

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