Toothed wheels driving sliders along channels

Wheel n reciprocating along channel m–n

Turning wheel a and giving it four revolutions makes wheel n turn upon itself and arrive at m, the opposite side of wheel a; four more revolutions in the same sense return n to its first position. Always turning one way, n thus travels out and back along the channel m n.

Carriage a driven along track m–a

If wheel d is held still while wheel b turns together with wheel n beneath it, the carriage a travels the path m a as many times as wheel b makes turns. The motion of the slider is thus geared directly to the count of revolutions.

Contrary-turning wheels on a shared pole

Wheel m is placed above wheel n on one same pole, but the two must turn in contrary directions. The oval channel c takes the pole of wheel a, so that during the opposed rotation of the two wheels a finds itself now far from the pole and now near it.

(In alto a destra figura con le lettere:)

(In alto a sinistra:)

(Sotto, a sinistra, figura con le lettere:)

(A metà pagina a sinistra figura con le lettere:)

(Sotto la figura:)

(A destra piccola figura con la lettera:)

(Di fianco figura con la lettera:)

(Sotto a destra figura con le lettere:)

(Di fianco a sinistra figura con le lettere:)

(In basso sotto le figure:)

(Top right, figure with the letters:)

(Top left:)

(Below, at left, figure with the letters:)

(Halfway down the page at left, figure with the letters:)

(Below the figure:)

(At right, small figure with the letter:)

(Beside it, figure with the letter:)

(Below at right, figure with the letters:)

(Beside it, at left, figure with the letters:)

(At the bottom, beneath the figures:)

Toothed wheels driving sliders along channels

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Wheel n reciprocating along channel m–n

Carriage a driven along track m–a

Contrary-turning wheels on a shared pole