Machine with Rollers and Lantern Pinions; a Calculation
A pinned strip seating in the square hole of the pinions, with the sum 40 x 6 = 240
The upper half shows a machine with two large drums or rollers held in a frame beside a tall finialed housing, above a broad band of closely ruled parallel bars. A note explains that a horizontal strip fitted with pins seats into the square hole of the lantern-pinions. A short arithmetical operation, forty times six is two hundred and forty, is written at the lower left among further faint mechanical sketches.
On this page
Pinned strip seating in the square hole of the pinions
A horizontal strip fitted with pins is described as going into the square hole of the lantern-pinions (rocchetti). The remark accompanies the gearing drawn on the sheet.
Twin drums in a frame over a ruled band
Two large shaded drums or rollers are mounted in an open frame, with a tall finialed housing to the right. Beneath them runs a wide band of densely ruled parallel lines, apparently a further part of the machine.
A multiplication: forty times six is two hundred and forty
A short worked calculation is set down: 40, 6, and the product 240. It records that forty multiplied by six gives two hundred and forty.