It's a spring loaded timer under the bread rack, when it's time is up, a catch releases the spring up up pops your toast.
The duration of Up Pops the Duke is 1200.0 seconds.
The duration of Up Pops the Devil is 1.42 hours.
Up Pops the Duke was created on 1931-09-20.
When you release the lid of a jack-in-the-box, the stored potential energy in the spring is converted into kinetic energy as the spring unwinds and the box pops open. This kinetic energy is what causes the toy to pop up and the jack to spring out.
The latch pin can be adjusted up and down to latch nice and tight. If its not locking in all the way that might be why it pops out. If you've adjusted it and it still pops out the close spring could be broken or something is faulty in the latch. To adjust the pin, loosed locknut and turn pin clockwise to make tighter, or counter to make looser.
Nest
Up Pops the Duke - 1931 was released on: USA: 20 September 1931
Pop up timer, also named disposable cooking thermometer, it normally has four parts: 1. The outer case; 2. The little stick that pops up; 3. A spring; 4. The internal thermosensitive organic material. The thermosensitive organic material is solid at room temperature and turns to a liquid (melts) at about predetermined 185 degrees Fahrenheit (85 degrees Celsius). When these thermosensitive material turns to a liquid, it frees the end of the little stick that had been trapped in the thermosensitive material. The spring pops the stick up and you know the turkey is done!
A Jack in the Box is a windup toy that, when wound up, generally plays music (although some variants are quiet), and then a small figure on a spring pushes up a lid, and pops out, generally startling, or even scaring young children.
a ship hit the bucket filled with loli pops and narwal pops
It pops up by a card spring inside the card. As you open the card the springs gets bigger and when you close it the spring gets smaller. this makes the picture inside pop up.