So we all know about McCoy's iconic medical scanner, but there is also a lesser known hand scanner that comes up in a few obscure moments in TOS. I've always actually preferred this one (in my infinite love of obscure medical and engineering props), so I was very happy when my friend @nicksdad told me he was working on figuring out how to make them. He showed me a prototype he has been working on, which looks excellent (I'll take photos soon), and I said I might be able to help him with a bit of R&D/refinement and we all could learn something in the process.
Reminder: this is a public research thread only; any potential trades or sales should be discussed privately or on other sites—feel free to contact @nicksdad directly.
Before we get to the screencaps, here is an excellent scan of the cover of TV Magazine showing a great publicity shot of the prop. Thanks to @pvault for providing this scan (via Gary).
"The Naked Time"
Note that is has to fit in the tricorder lower compartment, so that should give us an upper bound on the sizing. @JoeB
, can you guy provide me specs on that?
The specular highlights above suggest an irregular surface.
The light is visible in this one.
The flanged cylinder appears black here.
This is one of the best views of the graduations on the rotating rings.
"Balance of Terror"
Another image of it in the tric compartment
"Tomorrow is Yesterday"
Here we can see the switch and light working together.
"The Alternative Factor"
Starting around 42:28
"The Doomsday Machine
Note here the sliding M'Benga-style switch
Based on the above observations, the following are my conclusions about this prop. I encourage folks to challenge me on any and all of these so we can converge on some consensus on what precisely this thing was like and how it went together.
It has two sets of freely black spinning rings with graduations on each in yellow, similar to a vintage camera focus ring
I am inclined to surmise that these are engraved into the surface (with yellow paint wiped in) rather than raised, as I can't find any photo where the marks are obviously raised above the surface.
The top is a somewhat irregular (wavy/non-flat) glossy black
There is a tiny light near the edge of the black area, controlled by a switch on the side
I believe this shines from below the black layer rather than with a through-hole, which suggests that...
The top black layer is translucent
I think that the best way to replicate this would probably be to use dark smoke acrylic and ignore the surface irregularity, which would be hard to replicate anyway.
There is a protruding flanged cylinder to keep the scanner from rolling when placed on a table.
This sometimes appears as raw brass and sometimes as black. It is possible there were two versions of the scanner, which is further supported by the fact that...
Two switch types are seen on the scanner: the common brass toggle and (in "The Changeling") with the M'Benga-scanner-style slide switch.
Relative the central axis, the switch always appears at at 90 degrees rotation to the right of the flanged cylinder. For the brass toggle, the down position is the closed ("on") position.
It likely uses the same grip and cup base as the McCoy medical scanner