Wire movement sensor and control for wire stitching machine

Details Wire movement sensor and control for wire stitching machine Wire movement sensor and control for wire stitching machine

1986-05-15

1987-11-03

Bell, Paul A.

Elongated-member-driving apparatus

With randomly actuated stopping or disabling means

226 48, 227 8, B27F 717

Patent

active

047038810

ABSTRACT:
A method and apparatus for sensing wire movement through a wire stitching machine includes a sensor such as a photodetector or microswitch for sensing movement of wire through the machine and a programmable controller in communication with the sensor for stopping operation of the stitching machine if wire movement is not sensed. The sensor detects the rate of unwinding of wire from a spool that feeds the wire to the stitching machine. The programmable controller includes timers that time frequency and duration of signals from the sensor. If the sensor signals fall below a predetermined frequency or exceed a predetermined duration, the controller responds by stopping the machine and sounding an alarm. The apparatus may also include a second sensor at the diversion gate of the wire stitching machine for sensing the stoppage of wire through the machine in response to the diversion of an oversized article. If such a diversion occurs, the second sensor freezes the timers within the controller until the diversion ends.

REFERENCES:
patent: 2199286 (1940-04-01), Fischer
patent: 2227303 (1940-12-01), Flaws, Jr.
patent: 3120664 (1964-02-01), Mott
patent: 4386725 (1983-06-01), Chambers
patent: 4437422 (1984-03-01), Torres
patent: 4516713 (1985-05-01), Meijer
United States Defensive Publication No. T958,003 to Russel et al. May 3, 1977.

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