Following jackdoud's identification of the button used to make the alarm button on Janine's desk at GBFans, and two current builds in progress in the topic where it was identified, I was inspired to have a go myself.
The first stumbling block was getting the button. eBay is positively flooded with near, but not quite identical Square-D buttons (9001-TR14 Heavy-Duty oil-tight control unit), the most common results being identical, bar from either having a half-guard, or a full-guard surrounding the button, preventing anyone from being able to imitate Janine by slamming their palm down on it.
Electing to purchase one of the half-guard buttons, one eventually arrived earlier this week, complete with a full complement of different-coloured plastic inserts for the button piece. The button itself cost $4, plus $30 postage to the UK (ouch).
Next was the dome. Jack had opted to go for a chrome-plated retractable clothesline, and as the shape was pretty close to the screen-used item, I went for the same approach, purchasing the following for a total of £7.49 (including P&P, $12.24):
Dismantling the clothes line, I unscrewed the base, removed the line wheel and unscrewed the chromed cap that the line fed through, leaving only the dome. For mounting the button, I planned to drill two holes into the dome and attach it with a pair of appropriately small machine screws.
With a length of masking tape stuck over the top of the dome, I traced around the ring which threads onto the main body of the button (and you may have to flip over if you decide to purchase one to replicate the button).
I then proceeded to measure the distance between the center point of one of the screw holes in the base of the botton over to another.
I then transcribed that measurement onto the masking tape and marked where I'd be drilling through the dome.
I then fitted the button to the dome with the pair of machine screws I'd picked out from my odds and ends, however they prooved less than satisfactory, being rather loose in fitting.
Turning my attention briefly away from the machine screws, it was now time to see if I could do anything about the guard on the button. Fitting two bits of thin MDF under the flange that was attached to the button via a rod, I was able to hold it in place, and flush with the lower edge of the guard in order to allow me to attempt to saw off the half-guard.
I fitted the guard into a vice, and carefully sawed through it, keeping the saw as level as I could with the button piece. Although the cut wasn't 100% even, it was enough to work with, and a few minutes with a file removed the remaining sharp edges that'd been left over.
Getting ready to put everything back together, I turned my attention back to the screws. Digging out a box of screws and other fittings I'd salvaged from a bunch of computers we'd been scrapping, I managed to locate a pair that had just the right threading to screw into the bottom of the botton, and hold in nice and tight:
There are still a few tweeks to perform, such as gluing the ring in place so the holes in it are lined up with the holes in the body of the button, and adding a wooden base with feet so that the dome, and whatever surface it's sat on aren't scratched up. I may also try cut and file the “post” seen on the right-side of the spacer of the button, in order to make it more screen accurate.
I've also had some thoughts on how the button could even be equipped with electronics so that if you wanted to, you could make it an interactive prop. I'll try detail those at a later date, but for now, a little bit of set dressing:
And the real deal: