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Mine Exploration Forum

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Author Vent shaft stacks
Jim MacPherson

Joined: 02/09/2015

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Vent shaft stacks
Posted: 11/11/2020 16:23:30
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staffordshirechina wrote:

Lindybeige wrote:

https://www.flickr.com/photos/bookhistorian/33696587890/in/album-72157682587188056/

This picture from Agricola shows vertical shafts with brattices dividing them into separate parts. One, the nearer, has a structure designed to catch the wind from any direction and direct it downwards into one shaft. In the background, another shaft has a stack built over it, wider at the top, apparently out of wooden boards.



The big question is what note does Agricola give against "A" or "B"?



The notes are in the book Les, as are lots other diagrams but none for vent shaft stacks, several ornate chimney stacks for furnaces and many obedient hounds!

I'm busy with work for a while but I'll add Agricola's notes for A and B on the diagram.

Jim
IP: 86.143.139.238
sinker

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Joined: 13/12/2010
Location: North Wales.

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Vent shaft stacks
Posted: 11/11/2020 16:33:14
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Are the head frame / winders interchangeable?
The winder at B could also be installed on the frame at A.
Could you assume that the stacks could also be moved from one location to another?

Plot thickens etc

--

Yma O Hyd....
IP: 82.132.244.32
Jim MacPherson

Joined: 02/09/2015

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Vent shaft stacks
Posted: 11/11/2020 17:03:46
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Book VI (page 202 in my Hoover edition)

"A" is termed "PROJECTING MOUTH OF CONDUIT"

"B" is termed "PLANKING FIXED TO MOUTH OF CONDUIT WHICH DOES NOT PROJECT"

There are notes on other pages referring to his "genera" of ventilation methods. Haven't fathomed which bit refers to this diagram yet.

A few pages earlier a largely identical diagram has the planking shut with ye olde myner stood on top.

There are some pics of Silverband open cut which cut through earlier lead mine shafts etc which seem to have quite similar "horizontal doors" attached, I suppose it's possible they were also ventilation devices.

Jim
IP: 86.143.139.238 Edited: 11/11/2020 17:05:02 by Jim MacPherson
robnorthwales

Joined: 21/05/2008
Location: Denbighshire, North wales

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Vent shaft stacks
Posted: 11/11/2020 17:21:57
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Coggy wrote:

Are you Youtuber Lindebeige really looking for information or some lazy person trying to scam information for a thesis or book you plan to write; I suspect this as you have say you half the information (but are too idle to find the other half) Ban Me


If you'd spent some time looking at Lindybeige's videos - on a variety of subjects - I suspect you might not be so blatantly offensive.

IP: 80.189.176.27
colin567

Joined: 06/06/2008
Location: Ouston

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Vent shaft stacks
Posted: 11/11/2020 17:40:00
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Looks like if Ye Olde Miner were to try winding that jack roll, he would be uncomfortable and likely to fall down the hole! IP: 78.149.201.254
Jim MacPherson

Joined: 02/09/2015

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Vent shaft stacks
Posted: 11/11/2020 18:12:03
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colin567 wrote:

Looks like if Ye Olde Miner were to try winding that jack roll, he would be uncomfortable and likely to fall down the hole!


I think Georgie, he's my mate now, was prone to a bit of artistic licence, never mind improbable windy clouds and iffy perspective, his furnace chimneys have a slight camponile look to them, a bit like some 19thC mill chimneys in Yorkshire etc, but less sure they were a regular feature in the wilds of the Harzt, I'm sure a local Pevsner will say I'm wrong Tongue

Jim
IP: 86.143.139.238
staffordshirechina

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Joined: 15/11/2009
Location: North Staffordshire

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Vent shaft stacks
Posted: 11/11/2020 22:02:33
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Thanks for those Jim. As you say, a bit vague. IP: 2.98.87.51
Lindybeige

Joined: 10/11/2020

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Vent shaft stacks
Posted: 12/11/2020 00:56:07
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Jim MacPherson wrote:

Book VI (page 202 in my Hoover edition)

"A" is termed "PROJECTING MOUTH OF CONDUIT"

"B" is termed "PLANKING FIXED TO MOUTH OF CONDUIT WHICH DOES NOT PROJECT"


Yes, I think this refers to the direction of air-flow. 'A' projects (emits) air, while B collects it.

I see now that I have conflated two pictures. This one shows the multi-directional wind-catcher design:

https://www.flickr.com/photos/bookhistorian/33696588710/in/album-72157682587188056/

The one I showed before has but a simple square board to catch the air, but the basic idea is the same.
IP: 2.100.240.245
Lindybeige

Joined: 10/11/2020

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Vent shaft stacks
Posted: 12/11/2020 01:06:52
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I was wrong again! I found a quote in the Agricola text suggesting that the air goes DOWNWARDS through the chimney, and that its wider mouth at the top is to enhance the collection of winds! Sorry! IP: 2.100.240.245
AR

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Joined: 07/11/2007
Location: Knot far from Knotlow in the middle of the Peak District

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Vent shaft stacks
Posted: 12/11/2020 09:24:26
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There's record of constructions known as "horseheads" on the top of ventilation shafts in the Peak District, being basically a funnel that could be moved round to catch the prevailing wind and direct it down the shaft and into the workings.

--

Follow the horses, Johnny my laddie, follow the horses canny lad-oh!
IP: 5.102.188.171
Lindybeige

Joined: 10/11/2020

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Vent shaft stacks
Posted: 12/11/2020 15:03:45
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That sounds very like a device (unnamed) in Agricola which is a barrel with a hole cut in one side, and a vane stuck on the back like the tail of a weathercock, so that it faces into the wind nd catches some in the hole. It revolves on the end of a downwards pipe. Presumably, these worked, but a modern designer would probably come up with a more efficient shape.
IP: 2.100.240.245
Peter Burgess

Joined: 01/07/2008
Location: Merstham. Or is it Godstone ...... ?

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Vent shaft stacks
Posted: 12/11/2020 16:03:24
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Rather in the style of the top of an oast house in South East England, for drying hops. IP: 91.125.156.131
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