What is this light fixture?

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What is this light fixture?

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What is this light fixture?

Postby m3a1 » March 13th, 2019, 7:05 pm

What is this thing?

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Re: What is this light fixture?

Postby Mr. Recovery » March 13th, 2019, 8:16 pm

Looks a lot like a motorcycle light, perhaps off a MP bike??? :roll: :)

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1960 M151 Run 1
1963 M151 Willys DoD 10-63 in Baltimore
1967?? M151 MFD By Ford Motor Co?? SOLD
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Re: What is this light fixture?

Postby m3a1 » March 13th, 2019, 8:19 pm

The lens color (kind of a very light turquoise) is what's throwing me off. That, and that crazy 'gunsight hood' which is, no doubt designed to keep the light beam from spreading. Kind of like a spot light with a really narrow beam. It is more than just a guard because it has great depth and its even painted black while the rest of the front is green (all original paint).

And then there's that goofy knob on the top which is permanently fixed to the back part of the housing.

Bulb inside is 28v. It fits but I'm not entirely sure it belongs in there. It's essentially the same kind of bulb you would find on the headlights of a tractor.

Original wiring is very similar to what we find in our M151s, right down to the ID tag on the wire.

The whole thing is mighty strange.
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Re: What is this light fixture?

Postby fowlercal » March 13th, 2019, 11:45 pm

TJ

That looks like the interior light fixture from the M-43 Ambulance. It is mounted in the ceiling in the back of the ambulance. There should be another bracket or piece to allow it to be aimed or moved in the mount.

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Re: What is this light fixture?

Postby SturmTyger380 » March 14th, 2019, 7:51 am

From the G741 page:

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45' MB, ??' MBT, 47' CJ2A, 48' CJ2A,
51' M38 #1, 51' M38 #2, 51' M100,
52' M37, ??' M101A1 (1st Gulf War Vet),
53' M38A1, 53' M211, 65' M151A1, 67' M416,
MVPA #31724
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Re: What is this light fixture?

Postby m3a1 » March 14th, 2019, 1:03 pm

That's it! Many thanks.

I found a pair on eBay that shows how it is assembled to the base. Base unit seems grossly over complicated but it sure looks like it would stay put even when bouncing around. Sadly, these are missing their colored lens.

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Last edited by m3a1 on March 15th, 2019, 4:13 am, edited 1 time in total.
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Re: What is this light fixture?

Postby m3a1 » March 15th, 2019, 4:12 am

I got my wife on board with this since she knows about this medical stuff. So, prepare yourself for a little odd knowledge. Ready? Steady.... GO!

Well first, by today's surgical light standards, this thing is a total dinosaur. In fact, it's more like primordial soup but far better than treating the wounded by candle light. But our questions are - Why do these surgical lamps have the blue-green lens and what is up with that crazy 'gunsight cover'?

It turns out what I call the 'gunsight cover' does two things. First, it minimizes the light field diameter. Without it, light would be spilling out of where you'd want it, creating all sorts of shadows and generally wreaking photon mayhem if there is such a thing. The gunsight cover (which you may have noticed has quite a bit of depth) also maximizes the light field center. In short, it's kind of like a traffic cop for light, directing it into a tighter and therefore brighter beam and it does so rather inexpensively without need of a fancy lens to do al that. And so, what would otherwise be just a lowly light fixture begins to be something else entirely. Science. Ya gotta love it.

Now for the really good stuff. Color rendition is for the purpose of distinguishing true tissue color in a cavity and, while this particular system is only available in the the blue-green provided by the single lens, really modern surgical theater lamps can provide a variety of colors on demand. But, it turns out the blue-green color is particularly useful in helping bring out the contrast of bile and fat against other tissues and, sadly, there is a high probability of that if one has been shot to pieces or blown to smithereens. Having bile all over your guts is a serious situation ( think of it as an acid spill ) with some rather nasty and complicated outcomes so it is clearly something that requires some immediate action, like maybe tying off a bile duct. Difficult to do when you can't see what's what. And of course having truckloads of fat loose in your bloodstream is another horror story with awful outcomes. So somebody decided blue-green would be the most useful color. So there you have it. The whole thing is more than just a really cool reading lamp.

Cheers,
TJ
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Re: What is this light fixture?

Postby SturmTyger380 » March 15th, 2019, 7:17 am

That was interesting about the Color rendition. Thanks for sharing.
45' MB, ??' MBT, 47' CJ2A, 48' CJ2A,
51' M38 #1, 51' M38 #2, 51' M100,
52' M37, ??' M101A1 (1st Gulf War Vet),
53' M38A1, 53' M211, 65' M151A1, 67' M416,
MVPA #31724
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