[Pumpkinhead625]

Here's a link to an Instructable: http://www.instructables.com/id/7ft-Jack-in-the-Box-Static-Prop/

You could also go to youtube and search "Jack-in-the-box"

 

[matrixmom]

There is a tut on the "other forum" hold on - i will post link here.

 

[matrixmom]

https://www.youtube.com/watch?v=Au9lyD2hd14

from slam on haunt forum

 

[znelson710]

I can walk you through how this one works. I built it about 6 years ago back in high school.
https://www.youtube.com/watch?v=03kN-hPqWw4

 

[madmax]

Here's a simple one I built about 9 years ago.

It's about as simple as it comes for this type of prop.

One 18 inch throw air cylinder and a 5 RPM to turn the handle

Have to remember 9 to 10 years ago most people still had dial up internet and a video was a huge file so you will have to make due with the small GIF to see it in action

The top is raised by the head of the prop and gravity lowers it

Build the box run a 2x4 from side to side drill a hole in the center and put your cylinder through the hole

 

[Phantome46]

https://www.youtube.com/watch?v=Au9lyD2hd14

from slam on haunt forum

This is such a cool project. I'd be really keen to get a copy of the cog design to ensure I get the spacing correct. Was this ever put on the web?

Thanks