ich the threaded ends of the pins canbe screwed, thereby forming a support for the outerends of the pins, and also firmly holding the innerends of the guards. In the top edges of the ends,rollers, G, are journaled, on which the cover can slide.When the cover is closed, the flanges rest in… … ^■^Ysk^ IMPROVED NUT LOCK. The invention shown in theengraving, recently patentedby Mr. James A. Campbell, ofBrenham, Texas, consists ofa friction roller held looselybetween two nuts, or betweena nut and any object to beheld by the bolt, and whichbinds the nut upon the bolt,and locks it when the…
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