Any Ideas What This Is?· Page 2

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grahami
50.2% (Neutral)
Newbie

10 years ago

#21

"Roy Morton" wrote:
An interesting device, but I wonder how the metal was introduced into the mould?
Could prove to be a tedious task injecting it into 90 little sections.

I would imagine that maybe just enough molten metal was poured into one half (with the holes lined up) to fill the moulds in the half below and then the handle rotated to shear them off?
Or perhaps one half was filled and the other half placed on top and then rotated ??

Grahami

The map is the territory - especially in chain scale.

Morlock
50.2% (Neutral)
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10 years ago

#22

Deleted as I'd just written some theoretical drivel.:lol:

Concur with bullet mould comparison though.

inbye
50.2% (Neutral)
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10 years ago

#23

The trick to using this would be plenty of pre-heat (you can tell I used to make lead soldiers, lol) so the mould would be heated using a blowlamp. There's quite an upstand (flange) at the top and the molten lead would be poured in to this reservoir. I don't imagine this process would take place in the lamproom. Well before the days of health & safety, the bloke doing it would certainly end up with a headache.
Advert dates from 1920's...

Regards, John...

Huddersfield, best value for money in the country, spend a day there & it'll feel like a week........

Roy Morton
50.2% (Neutral)
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10 years ago

#24

"Morlock" wrote:
Deleted as I'd just written some theoretical drivel.:lol:

Surely that makes you an expert by default 😉

"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"

Morlock
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10 years ago

#25

"Roy Morton" wrote:

"Morlock" wrote:
Deleted as I'd just written some theoretical drivel.:lol:

Surely that makes you an expert by default ;)

:lol::lol::lol:

exspelio
50.2% (Neutral)
Newbie

10 years ago

#26

Surprised no-one has measured the countersink and compared?.

Always remember, nature is in charge, get it wrong and it is you who suffers!.

ttxela
50.2% (Neutral)
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10 years ago

#27

"inbye" wrote:
The trick to using this would be plenty of pre-heat (you can tell I used to make lead soldiers, lol) so the mould would be heated using a blowlamp. There's quite an upstand (flange) at the top and the molten lead would be poured in to this reservoir. I don't imagine this process would take place in the lamproom. Well before the days of health & safety, the bloke doing it would certainly end up with a headache.
Advert dates from 1920's...

It does look like the same bit of kit doesn't it?

I used to spend many happy hours casting pistol bullets in the garage, the trick was to keep the mould at just the right temperature by casting at the right speed, this looks significantly larger than my old bullet moulds though and so would hold the heat better?

Excuse my ignorance but what would the lead rivets be used for, and how many would you need. It would be a mighty faff to use this as a one off to make 90 rivets but spending all afternoon producing thousands would make sense.

royfellows
50.2% (Neutral)
Newbie

10 years ago

#28

"ttxela" wrote:

I used to spend many happy hours casting pistol bullets in the garage

Off thread but same here, I owned 7 handguns and 3 rifles and was never a problem to anyone.
Times change.

My avatar is a poor likeness.

Morlock
50.2% (Neutral)
Newbie

10 years ago

#29

If we assume that the countersinks are the equivalent of the bullet mould pouring gate/shear plate would the finished rivet have a cast head at the bottom of the mould?

Edit: Did the rivet have a 'head', could it have been a tapered pin to aid extraction?

exspelio
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Newbie

10 years ago

#30

I was thinking about comparing the countersink on the mould to the countersink on the rivet hole on the safety lamps that someone earlier suggested the rivets were for.

Always remember, nature is in charge, get it wrong and it is you who suffers!.

staffordshirechina
50.2% (Neutral)
Newbie

10 years ago

#31

Roy, does that mean you are a problem nowadays?

;D

royfellows
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10 years ago

#32

"staffordshirechina" wrote:
Roy, does that mean you are a problem nowadays?

;D

I can be a nuisance at times.
:lol:

My avatar is a poor likeness.

inbye
50.2% (Neutral)
Newbie

10 years ago

#33

"ttxela" wrote:

"inbye" wrote:
The trick to using this would be plenty of pre-heat (you can tell I used to make lead soldiers, lol) so the mould would be heated using a blowlamp. There's quite an upstand (flange) at the top and the molten lead would be poured in to this reservoir. I don't imagine this process would take place in the lamproom. Well before the days of health & safety, the bloke doing it would certainly end up with a headache.
Advert dates from 1920's...

It does look like the same bit of kit doesn't it?

I used to spend many happy hours casting pistol bullets in the garage, the trick was to keep the mould at just the right temperature by casting at the right speed, this looks significantly larger than my old bullet moulds though and so would hold the heat better?

Excuse my ignorance but what would the lead rivets be used for, and how many would you need. It would be a mighty faff to use this as a one off to make 90 rivets but spending all afternoon producing thousands would make sense.

The rivets were a cheap & reliable way to lock safety lamps. The most common was the hasp & staple, shown here...

🔗Personal-Album-1583-Image-97533[linkphoto]Personal-Album-1583-Image-97533[/linkphoto][/link]

Next shows a less common flange type lock...

🔗Personal-Album-1583-Image-97534[linkphoto]Personal-Album-1583-Image-97534[/linkphoto][/link]

Last shows a CEAG combined electric handlamp & flame safety lamp, dating from late 1940's, early 1950's.

🔗Personal-Album-1583-Image-97535[linkphoto]Personal-Album-1583-Image-97535[/linkphoto][/link]

Regards, John...

Huddersfield, best value for money in the country, spend a day there & it'll feel like a week........

exspelio
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Newbie

10 years ago

#34

Was thinking more about the Davis lamp, since they made the tool?

Always remember, nature is in charge, get it wrong and it is you who suffers!.

Graigfawr
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10 years ago

#35

"ttxela" wrote:
what would the lead rivets be used for, and how many would you need. It would be a mighty faff to use this as a one off to make 90 rivets but spending all afternoon producing thousands would make sense.

A large colliery might have 2,000 colliers, each with his own lamp. Lead rivets were only usable once so mass production was necessary. The old rivets would be remelted and extra lead added to replace molten lead that oxidised. With hundredweights of old rivets that could not be re-used, it made more sense to re-melt in the lamp room than to send them away as scrap and to buy-in new rivets.

exspelio
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Newbie

10 years ago

#36

"Graigfawr" wrote:

"ttxela" wrote:
what would the lead rivets be used for, and how many would you need. It would be a mighty faff to use this as a one off to make 90 rivets but spending all afternoon producing thousands would make sense.

A large colliery might have 2,000 colliers, each with his own lamp. Lead rivets were only usable once so mass production was necessary. The old rivets would be remelted and extra lead added to replace molten lead that oxidised. With hundredweights of old rivets that could not be re-used, it made more sense to re-melt in the lamp room than to send them away as scrap and to buy-in new rivets.

Err, surely not every miner had his own 'safety lamp', I thought it was just the Deputies?

Always remember, nature is in charge, get it wrong and it is you who suffers!.

Morlock
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Newbie

10 years ago

#37

One of my mates (1970s) said something along the lines of, a re-lighter for each Deputy and one lamp for a group working as a team in one area.
He also mentioned re-lighting stations at various designated points for lamps requiring electrical ignition.

Edit: As the pits concerned were all electric caplamp at that time I would guess the regulations in force (then) governed the issue of safety lamps.

staffordshirechina
50.2% (Neutral)
Newbie

10 years ago

#38

At the time this gadget was used, all miners had safety lamps as their only source of light.
Remember, that is what safety lamps were invented for. Before that all they had were 'unsafe' lamps that blew up. They only started using them for gas detection when it was noticed that you could see a difference in the flame when methane was present.
As time went by, electric lamps arrived and safety lamps only continued as gas detectors. Then, as Morlock says, they were used by Deputies and some by workmen as required.

Les