Picture of Trap
july 007.jpg

Household springs more commonly available than spring steel,  with this modification you can replicate the results to produce a number of variable spring powered devices.

materlials - mild steel (various), spring (size approximately from trampoline) 

method - some complications winding the spring mainly,  as a novice at working with springs it is *very dangerous during construction*,   i wound it as tight as it would go (variable - less winds,  less force),  clamped and welded in place.  one thing to bear in mind,  is scratches from tools and/or heat/welding spatter can really damage spring steel causing dangerous failure.

our habitat supports our life,  do not abuse it.  excerise caution,  harmonize with nature and tread lightly.
please understand that this was a last resort, i now mean to construct a cage trap.
all differences aside the knowledge/ pratical benifits of this exercise were invaluable,  springs have many practical applications that would not be possible without the aquisition of this knowledge.

summary - an alarm or signal system could be used to notify trap closure,  that would be a considerable improvement,  over having to check all the time.
kode13037 months ago
The law says:
"All traps listed on this site are permitted under certain conditions in WA.
Steel-jaw traps are permitted for wild dog control. The jaws must be bound with cloth soaked in strychnine. Only padded steel jawed traps are permitted for fox and rabbit control and use in research programs. Permits are required to set traps in metropolitan areas and special rural zones. Neck snares are illegal. Please see the legislation for more detail on areas where traps are permitted."
rimar20002 years ago
These traps are extremely cruel.
actually, no. depending on the target animal of course. since it is hard to gauge the size of the trap in the pictures, I'm going to assume that this is very large, and designed to catch a very large animal, such as a bear. that bieng said, I would not trust this trap to hold a bear, even with the spikes. I viewed this as more of a "proof of concept" trap, or a first attempt to prove that it can be done. but enough of that rabbit trail. there have been numerous studies that show that bieng cought in a foothold trap is not stressfull on the animal, and is very humane. although the traps used do not have teeth, it is often necessary for traps used to catch larger animals, such as bear, to have teeth.

You're just trolling right? I wonder if the "numerous studiers" have actually tested the effects on their stress of a gin trap on their own foot? Especially one that drives spikes through their ankle. Or yours.

These were banned years ago in NZ and have largely been replaced with various "instant kill" traps like the Timms Trap or the Department of Conservation's pneumatic traps (

I like your Instructables, mech, but have to strongly disagree with you on this subject.

I could take a long time to type out a reply, but then again it would be just my opinion, just as what you have previously stated is yours. This may just be a subject that we will have to agree to disagree on, because I sense that you will not be changing your mind and I certainly am not changing mine. However, I would ask that you educate yourself on the issue, and for your benefit as well as the benefit of the people reading these comments, I will provide a link which answers some of the main questions posed here. now keep in mind, I am not arguing for steel traps with teeth. That is a totally different debate and one that is probably not best to have in the comments here.

Sorry to intrude, but just seeing who opines, you can see the weight of opinion.

I agree fully with you.

Your arguments are quite interested and biased, not credible.

Again, these traps are extremely cruel. Extremely cruel.

There were cases of animals mutilated themselves a leg to escape. What do you call that?
caarntedd2 years ago
These are illegal in NSW, I don't know about WA. I thought they were illegal throughout Australia.

I'd hope so caarntedd! Gin traps are, rightly, banned in New Zealand.

awsome need to buy a welder
uncruel and fun if u do it rite like break the neck if its a bunny
QSDR (author) 2 years ago
the only size reference i included, was that the spring was similar to one found on a trampoline. the trap meaures 370 millimetres long, and is primarily a fox trap.
i realise now after some more research the mechanism works in the same way a mouse/rat trap works. if i knew then what i know now.

my focus.. for the time being, was on the technical information.
however, my thoughts on the moral and ethical basis for this kind of device,were deemed inappropriate to elaborate on in this forum.

for your sake i was being overly objective: 'Uninfluenced by emotions or personal prejudices', 'Based on observable phenomena; presented factually', 'undistorted by emotion or personal bias', etc.
Phil B2 years ago

Did you design and build this trap, or did you replace a spring of spring steel with a coil spring as a modification to an existing trap, or are you illustrating the principle of using a coil spring in place of spring steel?

I have often seen traps like this in various sizes and for trapping various animals. They all used spring steel compressed to a "U" or a "V" shape when the trap is set. I had never before seen one with a coiled spring.

I like to comment on Instructables because I learn things from the responses, and I have formed some new friendships.