Yarn detector switch with snap-on trapper

Details Yarn detector switch with snap-on trapper Yarn detector switch with snap-on trapper

1977-09-19

1979-01-02

Scott, James R.

Electricity: circuit makers and breakers

Special application

Running length, web or strand actuated

28227, 57 81, 66163, 200 6118, B65H 2514

Patent

active

041328752

ABSTRACT:
A two-piece snap-on yarn trapper including a molded U-shaped bracket that snaps onto a yarn detector switch and supports a plural-turn helical spring. This spring is held inwardly bowed in the bracket so that the turns are held open or separated on the yarn side to provide a series of V-grooves for receiving the yarn that is drawn tightly thereinto by the trip lever of the yarn detector switch thereby to trap the yarn when it goes slack. The bracket is provided with a pair of inner edges or guides to guide the yarn to the middle portion of the helix where trapping is most effective and reliable. The helical spring is compressed and snap-in assembled on a pair of angularly-disposed stubs received in opposite ends thereof to hold the spring in its bowed condition on the bracket due to the tension of the helix.

REFERENCES:
patent: 2706883 (1955-04-01), Keen
patent: 3848434 (1974-11-01), Hopkins
patent: 4027121 (1977-05-01), Haderer et al.

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