Safety Shutdown prevents accidental shock if contact is made to the ladder elements.
The finished unit intended for museums and similar displays is fully enclosed with the traveling plasma arc inside of a clear plastic shroud. The base of the unit is a plastic enclosure.
An internal fan supplies a slight over atmosphere pressure at the bottom starting point of the arc ladder to prevent any arc hangup from forming.
Produces a traveling wave of plasma that starts at the base of the ladder electrode elements, rises and widens as it ascends and evaporates into space. The vertical travel distance of the arc is about 16" and reaches a width of 2-3 inches as it extinguishes. It then repeats and continues traveling up the ladder, evaporating and restarting.
Allows varying the arc texture by a simple control that also is the main power switch. Texture can be a thin wispy like spark to a heavy hot energetic plasma arc.
Size of base is 10 x 7.5" with an overall height of about 21.5" (with shroud), and a weight of about 3 pounds. Runs from wall power (115 vac at 2 amps) through a standard three-wire grounded cord. A 220 volt version (JACK30-220) is also available for international use.
|This JACK30 Jacob's Ladder is assembled and ready to use. It is also available in other configurations:
- the JACK30-220 is also assembled but runs at 220V for international use
- the JACK1K is a kit with plans and all parts, requiring assembly
- the JACK3 are paper plans with parts and assembly required
- the JACK3-D are downloadable plans for a lower price
Posted by Dr. Lee Basham on 18th May 2022
This version of Jacob's Ladder is both Professor and Student proof, as it is surrounded by a glass enclosure. It is safe and still quite stunning. My students love it and as a method of creating student fascination it is hard to imagine better. I recommend this product without reservation. It can be used as a direct teaching tool for electrodynamics or a metaphor for more abstract questions in any field of thought, including literature, philosophy or history. It will hit a home-run wherever you use it.
Posted by Roots 2 STEM on 29th Apr 2021
The Jacob's Ladder is a well build model and fun to demonstrate to our students.