Yarn trapper for yarn detector switch

Details Yarn trapper for yarn detector switch Yarn trapper for yarn detector switch

1975-10-10

1977-05-31

Scott, James R.

Electricity: circuit makers and breakers

Special application

Running length, web or strand actuated

28 51, 57 81, 66163, 200 6118, B65H 2514, D04B 3514

Patent

active

040271218

ABSTRACT:
A trapper for trapping the yarn in a knitting machine and holding it, under normal slackening when knitting certain patterns, to prevent unwanted tripping of the detector switch and machine shutdown. This yarn trapper consists of a one-piece wire member having a two-turn helix with a pair of supporting arms bent out radially and outwardly from opposite ends thereof at a common angular point on the periphery of the helix and having inwardly bent mounting hooks at their ends. These arms are held slightly spread apart from their normal relaxed condition when the trapper is snap-mounted on the yarn detector switch to relieve the pressure between each of the half-turns and the full turn and thus provide a pair of semi-circular traps formed by the half turns in light touching contact with different portions of the full turn to frictionally hold even the thinnest yarn if it should be pulled thereinto upon attempted swinging of the trip lever. This trapping prevents full swinging of the trip lever and thus prevents unnecessary shutdown of the machine.

REFERENCES:
patent: 2706883 (1955-04-01), Keen
patent: 3194001 (1965-07-01), Forward
patent: 3707854 (1973-01-01), Matzel
patent: 3772487 (1973-11-01), Levin
patent: 3806677 (1974-04-01), Dehiega et al.
patent: 3848434 (1974-11-01), Hopkins

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