All eight clocks on display for the final day of camp.
Wow, took me long enough to post this. The last day of DEEP camp on June 28 and I learned so much from my students that I’ve been completely absorbed in revising the clock design that I haven’t taken time to post the photos of my student’s truly excellent work. Can’t wait for next year.
The video below shows six cardboard clocks running (mostly) all at once. What a lovely sound.
The recent purchases of a large shoe order and a new vacuum turned out to be quite helpful to the class.
Parents and students watch the closing ceremony and show while the clocks wait to be taken home.
The escape wheel reads: “Genius is eternal patience.” – Michelangelo
The escape wheel read: “Play is the highest form of research.” – Albert Einstein
In standard clock construction a clock wheel (aka: gear) is attached to an arbor and the arbor in turn is attached to a pivot. The same methods apply to the Cereal Box Clock except the wheels and arbors are made of paper and the pivots are wood.
Hot glue helps the wheel go round.
Trimming the outer edge of the Hour Wheel.
Using flush jaw wire cutters to cut wheel teeth is methodical yet enjoyable work.
Using a “Japanese” pull saw to cut arbor material. These saw work like butter.
Using a pull saw to cut dowels for pivots. These saws are so sharp that some students could cut through a dowel in one pull!
Assembling pinions is a lot of work and all of the students worked hard. Three eight leaf pinions are required for each clock.
The drilled holes are a little undersized so we must use this very sophisticated pointy stick to increase the diameter.
Five of eight pins inserted.
They don’t have to be straight.
Little smears of hot glue hold the pins in place.
Love the pink hot glue guns.
Each wheel and pinion must be secured to a paper arbor before being attached to the 1/4″ dowel pivot. The arbor is 1/4″ ID and 3/8″ OD. As I was designing the clock, I looked for off-the-shelf tubes that I could purchase but what I found seemed expensive and I wanted to ensure a consistent size so I decided that I’d have to roll my own. This video presented and excellent solution. Still, these are a challenge to roll consistently and I had to experiment for quite a while before I found the best technique to teach my students.
Applying glue thinned with water and a little rubbing alcohol to prevent wrinkling.One person holds the paper on the steel rolling pin to prevent the two from getting glued together.
Glue applied, starting the roll. A helper tries to keep wrinkles from forming.
Slow and steady.
All most there.
A finished arbor tube.
Center punching the pinion pin holes. I am impressed by how accurately these 4th, 5th, and 6th graders can punch these center marks. They did better than many college students I’ve seen. Perhaps their small hands and young, sharp eyes give them an advantage.
After Day 1, I knew that this group of students would benefit from the additional challenge of drilling their own holes. I drill all of the 3/8″ holes for safety concerns but I’m confident that the risks of injury when drilling an 1/8″ hole into chip board are minimal. Everyone has handled the drill press very well so far.
Cutting 1/8″ dowel rod into 3/4″ lengths for pinion pins using a custom jig. The Xcelite 170M flush cutters do a pretty good job and fit young hands very well.
Each plate is a double thickness of cereal box chip board plus a paper pattern all spray-mounted together. The average thickness of this material is 40 mil so it’s a bit of a challenge to cut through.
We often emphasize the importance of cutting parts to a rough shape first and then trimming the last bits off.