Jackscrews

Before these belts were devised it was necessary for every gun crew to carry a supply of beams, jackscrews and devices to be used in extricating the heavy guns when they got fast in the mud. ❋ Kelly Miller (1901)

The snow, curling and eddying across the little blaze of lamps, whitened everything alike, tender and wheel and rail, the jackscrews, the bars, and the shoulders and caps of the men. ❋ Unknown (1898)

Care and common sense are the jackscrews to use in raising fine fruit. ❋ Bolton Hall (1896)

The MRJ21 board-mount receptacle features a robust board-lock design for good PCB strain relief, and the cable assemblies provide offset jackscrews to ensure positive latching and secure cable retention. ❋ Unknown (2010)

The MRJ21 board-mount receptacle boasts a robust board lock design for superior PCB strain relief, and the cable assemblies provide offset jackscrews to ensure positive latching and secure cable retention. ❋ Unknown (2010)

a prodigal who comes home with the good health, and the money, and the appetite for calf; and when you are old, Uncle Ike, you sha'n't get wet any more, for I will buy you a duck boat that can't be tipped over with jackscrews, that you can't break with an ax, and that has air chambers in both ends, so it couldn't be sunk if loaded with railroad iron; and ❋ Unknown (1878)

"Of course, we got busy with crowbars and jackscrews and tried to pry ❋ Francis Metcalfe (1899)

We were [stuck in] that room for hours while that [jackscrew] went on and on about not one [fucking thing] that mattered. ❋ Flavius1965 (2014)