Sketchbook Moment No. 43

The Garden of Mechanical Knowledge. Converting (A) rotary motion into (B) linear motion.
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Steppy movement from a smooth cam

Interestingly, the motion derived from the smooth helical cam is jerky because the ratchet moves it in a series of 12 steps. The pin in the foreground moves back and forth picking a tooth at a time. The follower, the steel lever at top right, on which rests a brass button, is lifted in 12 increments then drops down.
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Sketchbook Moment No.42

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Psychology of perception. A: Necker’s Cube B: Necker’s Bicycle Read more

Sketchbook Moment No.41

Pulseometer. Cocktail stick, blu-tak, coin. This one shows a method of amplifying the pulse in your wrist so you can see it more easily.
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Sketchbook Moment No.40

Chosen
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Sketchbook Moment No.39

Mr. Rowbottom was mentioned on the radio this morning…
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Sketchbook Moment No.38

Robotic Police State
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Sketchbook Moment No. 37

Projectile.
Mechanical interpretation of the Heimlich manoeuvre.

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Sketchbook Moment No. 36

The Shop.
You need it. We got it.

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Sketchbook Moment No. 35

Inspirational Architecture:
Yes we cantilever