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Salada
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Hello again Si,
This is about the best I can do for interior photos of suitable U.S. type mine mill roof rafters. Sorry I forgot to count the nail holes. I didn't check the corrugated pitch either. Nor did I measure the timber sizes. Must have been having a lazy day.
The extra vertical posts are to support the high level ore bin seen at the base of the photo, plus support for a lightweight grader/crusher you can partly see at right-centre. I took the photo from some way up in the building. Normally this would mostly be open space.
Roof pitch angles can vary considerably according to local factors. Most roof pitches I have seen in the U.S. High Desert areas have been in the 25-35 degree range but on one mine site I noted a range of from 22 to 40 deg between various adjacent buildings. 30 - 35 deg would probably a good "modeller's average" I guess.
In many mines I have seen, the "lean-to/outhouse" houses the winder (cable drum, drum brakes & brake/clutch levers etc) and often also the winding engine (prime mover in US-speak). It can also, less often, be a mess-room/office &/or tools, equipment, spare winding cable, air hose store etc.
Regards, Michael
Photo by Salada
Last edited on Sat Feb 6th, 2016 11:52 pm by Salada
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Salada
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Si;
Some typical lean-to contents. By looking at the side walls & roofs you can see that both examples, from different mines, are housed in small extensions off the main mill building.
Photo 1 :
A typical "small mine" newer type of shaft-winder, typically circa 1940's - 50's & maybe a bit later.
The Safety At Work/Elf & Safety people must have made an inspection here !!.
- note the winding cable "safety fence trough" leading off upper left, where the cable runs through up into the main mill & on up to the headgear sheave. That guard is relatively unusual AND it looks much newer than the rest of the structure so I reckon they really did have a "visit" here.
Directly underneath the light reflection on the safety guard can be seen two vertical dark red levers. These are the combined brake-clutch controls. Taking one off usually engages the other through a simple link bar or you can operate both levers manually but never both together at the same time. As the clutch is engaged the main brake is automatically released & vice versa. Interestingly there is no "secondary" or parking brake - maybe not a requirement in the U.S. but is a requirement in many other countries. I rebuilt an almost identical winder some years ago.
Photo 2 :
An older piston type rock-drill air compressor with cooling water supply. No sign of what drove it, maybe a diesel ?.
You definitely wouldn't want the racket this thing makes inside the main mill ! Newer compressors are usually "screw" rather than piston but still noisy.
"Other Extensions I Have Seen" - often just rubbish & a few tables/chairs. Anything of value presumably knicked (stolen) by thievin' mine varmint.
Regards, Michael
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Si.
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Thanks Michael.
Just out of curiosity...
...any guess as to how much coal the small Grand Central mine might have used per day ?
The Gilpin Tram had a number of coal-cars & did do door-door delivery !
The Grand Centrals railroad-spur was lower than the mine-building (under tipple-trestle; see photo on last page).
So I guess coal might have been delivered in bags ? ...
...& manualy carried up to the back of the mine ?
Si.
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' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
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Salada
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Si. wrote: Thanks Michael.
Just out of curiosity...
...any guess as to how much coal the small Grand Central mine might have used per day ?
So I guess coal might have been delivered in bags ? ...
...& manualy carried up to the back of the mine ?
Si.
Depends, relativistically speaking, which side of the Galactic Meridian you view the question from OR the eternal diatribe concerning Hawkin's String Theory and the length thereof.
Impossible to say Si : so many variable factors.
Reasonable guesstimate looking at the size of the mill/headgear - roughly (VERY roughly) 8-20 tons/week. Pumping & winding are the biggest fuel users, followed by air compressors. How was the GC drained ? - free draining, diesel/gas engine, own electric genny or steam pump ??.
Better asking a real Gilpin brain - Keith, Duane, Woodie et al. They might have some coal shipping records ??
With all respect, Americans CARRY bags of coal  . Bulk load, almost certainly. I have seen piles of bags in old U.S. mine photos but I think they are ore parcels.
Regards, Michael
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Si.
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WANTED: DEAD OR ALIVE !
WINDOW EXPERT !
- - - - - - -
Looking at the windows in the photo of the Grand Central mine-building on the previous page...
...they are EXACTLY the same as countless other mines & buildings in Black Hawk etc.
There's NO WAY a carpenter made those windows on site.
They were probably shipped in to town on the Colorado & Southern in bulk, from a big joinery factory somewhere.
Or possibly made in town.
That's my guess.
So.
The question is:- how big is the window unit ?
&
How big are the individual panes of glass...
...I bet you could buy standard replacements in town.
It's gotta be one of the most 'bog std.' windows in the U.S.
Come on all you experts in the ancient art of American building...
...SPILL THE BEANS ! ... wadayerknow ?
Cheers.
Si.
Come on Herb.
You know the answer, I bet.
( Herb knows the thickness of Maine shingles, down to a micron ! )
____________________
' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1
' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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W C Greene
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I think the bags may have been ore bags. The product was carried in bags from many mines/mills. I believe the bags were sent to the smelters to be refined into ingots, etc. Well, this is just my opinion. I have seen old photos of sacks being loaded into boxcars at mills so that is where I got the idea. Duane & Keith KNOW the truth, I just know the bulls%%^&t.
Woodie
BTW-the windows are actually all made by Grandt Line...how's that for an "answer"?
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NevadaBlue
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Yes, ore was shipped in bags. Coal was also bagged, but I think it was probably mostly for home and small business heating. When I moved here about 15 years ago, you could still buy bagged coal in town. Unfortunately that ended about 10 years ago. I like coal for night time heating. We use wood otherwise.
Windows... I have seen lots of dilapidated buildings at mine sites in Nevada, and nearly all appear to have been factory made things, with weighted sashes and milled parts.
____________________
Ken
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Herb Kephart
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Si
You give me far more credit than I deserve, Thank you.
BTW-Glass comes, and has come for as far back as I have had any contact with it, in two thicknesses for that type fenestration (sp?) (just to impress)--single and double weight. I leave it to you, good Sir, to work out which is the thicker.
You forgot to ask for that bit of important information.
Woodrow--Add my name to the list of who remembers coal being delivered to residences in heavy duty canvas bags, swung over the shoulder of the truck driver,--- and a helper, I would guess in some deliveries.
Herb
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Fix it again, Mr Gates--it still works!"
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Salada
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Coal - I remember hearing about that black, dusty, lumpy stuff. Way before my time.
I thought windows came ready-assembled double pane with little plastic levelling bits ?.
Regards, Michael
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