The Collaborative International Dictionary
Sinker bar
Sinker \Sink"er\, n. One who, or that which, sinks. Specifically:
A weight on something, as on a fish line, to sink it.
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In knitting machines, one of the thin plates, blades, or other devices, that depress the loops upon or between the needles. Dividing sinker, in knitting machines, a sinker between two jack sinkers and acting alternately with them. Jack sinker. See under Jack, n. Sinker bar.
In knitting machines, a bar to which one set of the sinkers is attached.
In deep well boring, a heavy bar forming a connection between the lifting rope and the boring tools, above the jars.