The STOP and RESET buttons are from a Documation card reader.[1] They're not guarded. They just come from a standard kit of buttons and lamps where you could assemble the components and dividers into a control panel. That style of illuminated push button was once popular and is still available.[2] NASA Mission Control consoles had lots of them. [1] https://www.youtube.com/watch?v=se0F1bLfFKY [2] https://cpc.farnell.c…
They're recessed. Buttons come with recessed or raised actuators depending on the application. Recessed buttons prevent something bumping into the control panel from pressing the button. If you ever look at a properly designed industrial control panel, start buttons are flush or recessed and stop buttons raised.
Emergency stop buttons (E-Stop) are not only raised but feature a large "mushroom head" design to ensure they are visible and easy to press. They may have a recessed guard around them to prevent accidental actuation.
> [2] https://cpc.farnell.com/rjs-electronics/rjs-k16-391-ge-65j/i...
Side note: I grew up in a machine shop and the Comet VMC-1000 Mills we had featured a lot of the square/rectangular buttons[1]. The cycle start button has a Molly guard but is almost always missing as it's quite fragile and easily knocked off (ours were missing too.) I like the aesthetics so when I went to Japan and explored Akihibara Electric City, I found an industrial electronics vendor[2] just outside of the Akihibara Station who had a nice selection of them from Fuji Electric. I bought a bunch with 24V lamps for a PLC test stand. Another vendor is eao.
1. https://cdn.globalauctionplatform.com/auctions-2023/bsctho10...
