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Subject Jackscrews Remove constraint Subject: Jackscrews

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    • 1588

    Can be operated by a single person, easily and with little noise. The device depicted here is also illustrated on Plate 166.

    Mechanics: hand crank; worm and worm gear; double toggle linkage.

    • 1588

    Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; worm and worm gear; double toggle linkage.

    • 1588

    Can be operated by a single person, easily and with little noise. The device depicted here is also illustrated on Plate 164.

    Mechanics: hand crank; spur gear and lantern; worm and worm gear; lantern and rack.

    • 1588

    Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; spur gear and lantern; worm and worm gear; lantern and rack.

    • 1588

    The machine is braced against the chest. Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; worm and worm gear.

    • 1588

    The machine is braced against the chest. Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; worm and worm gear.

    • 1588

    Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; worm and worm gear; lantern and rack.

    • 1588

    Can be operated by a single person, easily and with little noise.

    Mechanics: hand crank; worm and worm gear; lantern and rack.

    • 1588

    Can be operated by a single person, easily and with little noise. The device depicted here is also illustrated on Plate 157.

    Mechanics: wrenches.

    • 1588

    Can be operated by a single person, easily and with little noise. See Plate 155 for illustration of its mechanism.

    Mechanics: worm and worm gear.

    • 1588

    Can be operated by a single person, easily and with little noise. See Plate 156 for illustration of this screw-jack in operation.

    Mechanics: worm and worm gear.

    • 1588

    Can be operated by a single person, easily and with little noise.

    Mechanics: wrenches.