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US 4,393,647 AGranted
Snail wire arrangement for yarn breakage detection in ring frames
OwnerYohji Kitamurainventor
Life of this patent
Estimating the term…
Abstract
In order for the snail wire that is to be fitted on a ring-frame for detection of yarn breakage to sense sharply the intrinsical vibration resulting from its contact with yarn, the flat portion of the snail wire where the piezo-electric element is mounted is modified so as to sense the vibration more easily and furthermore, the piezo-electric element and connecting lead are covered and retained with elastic material for protection to thereby ensure the yarn breakage detecting snail wire which can be used stably throughout a long period.
Claims3
A yarn breakage detecting snail wire arrangement for ring frames and the like comprising:
- a lappet;
- a holder inserted into said lappet;
- a resilient support member;
- a snail wire supported, through said resilient support member, by said holder inserted into said lappet so as to contact running spinning yarns for producing inherent vibrations at a side portion of said snail wire;
- and
- a piezo-electric element attached to a portion of said snail wire so as to detect said inherent vibrations for detecting presence of running spinning yarns, said snail wire being formed, at said portion thereof attached to said piezo-electric element along the face portion thereof, into a flat-shaped portion, said flat-shaped portion having a groove formed therein at a side face portion thereof opposite to said face portion attached to said piezo-electric element, and at approximately a central portion of said piezo-electric element in a direction intersecting at right angles with the axial direction of said snail wire so as to form a thin portion in said face portion of said snail wire attached to said piezo-electric element.
3 more elements
Dependencies are inferred from the claim text.