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Start Over You searched for: Date 1400 to 1599 Remove constraint Date: <span class="from" data-blrl-begin="1400">1400</span> to <span class="to" data-blrl-end="1599">1599</span>-
Plate 168: Two cranes for lifting heavy weights
- 1588
Left: for lifting stones, mortar, and other construction materials for large buildings. Right: for lifting bales, barrels, and other merchandise from a ship.
Mechanics: inertia chain; worm and worm gear.
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Plate 167: Screw-jack for bending or breaking the iron gratings protecting a city wall or canal
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 166: Screw-jack for bending or breaking the iron gratings of a defensive grille
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: hand crank; worm and worm gear; double toggle linkage.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 165: Screw-jack for bending the iron gratings of a defensive grille
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 164: Screw-jack for bending the iron gratings of a defensive grille
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 163: Screw-jack for breaking the bolt off a door
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 162: Screw-jack for breaking the bolt off a door
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 161: Screw-jack for bending the iron gratings of a grilled window
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: hand crank; worm and worm gear; lantern and rack.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 160: Screw-jack for bending the iron gratings of a defensive grille
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: hand crank; worm and worm gear; lantern and rack.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 159: Screw-jack for lifting a door from its hinges
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: wrenches.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 158: Screw-jack for breaking the iron gratings of a portcullis
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 156: Screw-jack for lifting a door from its hinges
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 155: Mechanism of screw-jack for lifting a door from its hinges
- 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.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 154: For breaking the bolt off a door
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: wrenches.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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3 items
Plate 153: Bridge for crossing a city or fortress water moat
- 1588
Bridge composed of boat-like floating sections, positioned by pulling them into alignment via a heavy and tethered arrow shot into the scarp.
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3 items
Plate 152: Bridge for crossing a city or fortress water moat
- 1588
Bridge composed of broad-bottomed boats, paddled via an internal crank, positioned with a rudder, and fastened together.
Monogrammed "JG" on rock at lower right.
Mechanics: horizontal crankshaft.
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3 items
Plate 151: Bridge for crossing a very deep river
- 1588
Bridge composed of boats, positioned with oars, anchored in place, and connected by unfolding doubled-over bridge sections. See Plate 150 for the transportation of components of bridge by horse.
Monogrammed "JG" on…
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Plate 150: Section of a bridge transported by horse
- 1588
See Plate 151 for the assembly of this bridge.
Monogrammed "JG" on rock at lower left.
Mechanics: winch.
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3 items
Plates 148 & 149: Bridge for crossing a river with shallow water
- 1588
Bridge with retracting sections, supported in the water by legs.
Mechanics: winch; roller guides.
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3 items
Plate 147: Bridge for crossing a city or fortress water moat
- 1588
Bridge sections composed of trapezoidal prisms are transported rolled up. Unrolled, the sections are connected together with hinges, and the bridge floats on the water.
Mechanics: winch; ratchet; projectile throwing…
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Plate 146: Bridge for crossing a city or fortress water moat
- 1588
This machine uses the principle of Nürnberg scissors, which are also known as Narrenschere (fool's scissors).
Mechanics: winch; Nürnberg scissors.
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3 items
Plate 145: Bridge for crossing a city or fortress moat
- 1588
Bridge with retracting sections.
Mechanics: capstan bars; winch; lantern and rack; roller guides.
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Plate 172: Crane for lifting heavy weights
- 1588
Mechanics: hand crank; spur gear and lantern; worm and worm gear; lantern and crown gear; flywheel; lewis.
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Plate 171: Crane for lifting heavy weights
- 1588
Especially useful in the construction of large buildings.
Mechanics: hand crank; worm and worm gear; lantern and crown gear; rope drive; flywheel.
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Plate 170: Crane for lifting heavy weights
- 1588
Mechanics: internal vertical treadwheel; spur gear and lantern; worm and worm gear.