On Apr 9, 11:42 pm, "azotic" <[email protected]> wrote:
> "R.H." <[email protected]> wrote in message
>
> news:[email protected]...
>
> > Set number 227 has just been posted:
>
> >http://puzzlephotos.blogspot.com/
>
> > Rob
>
> 1274 dosimeter used to measure exposure to nuclear radiation. The charging
> unit is missing.
> They date back to the duck and cover days of the cold war and were part of
> radilocical survey
> package issued to the civil defense, hense the CD marking.
>
> Best Regards
> Tom.
That's what I thought it might be but didn't know how it worked.
Here's and explanation. http://en.wikipedia.org/wiki/Dosimeter
Karl
On Fri, 11 Apr 2008 22:18:22 -0700, "azotic" <[email protected]> wrote:
>>>
>>> I've got a couple of related ones. They have the HV friction
>>>charger built-in. One holds a charge nicely, the other leaks down
>>>fairly quickly.
>>>
>>> Enjoy,
>>> DoN.
>>
>> Friction Charger? Ive never seen one of those
>>
>> Gunner
>>
>
>I have seen the piezo charger but never seen one with a buit-in charger.
>Could you post a pix of your unit don ? I would really like to see what one
>looks like.
>
>If anyones intrested heres a link to what the hand held piezo charger looks
>like,
>it the one with the handle you squeeze.
>
>http://www.civildefensemuseum.com/cdmuseum2/radkits/cdv750/cdv750s.jpg
>
>Best Regards
>Tom.
>
>
Now thats way cool!
Ive got a couple of the CD survey "kits", 3 different rad counters,
plus dosimeters and whatnot in each, ...and buying lithium ion D
batteries (long long term storage) got really expensive
Gunner
"[L]iberals are afraid to state what they truly believe in, for to do so
would result in even less votes than they currently receive. Their
methodology is to lie about their real agenda in the hopes of regaining
power, at which point they will do whatever they damn well please. The
problem is they have concealed and obfuscated for so long that, as a group,
they themselves are no longer sure of their goals. They are a collection of
wild-eyed splinter groups, all holding a grab-bag of dreams and wishes. Some
want a Socialist, secular-humanist state, others the repeal of the Second
Amendment. Some want same sex/different species marriage, others want voting
rights for trees, fish, coal and bugs. Some want cradle to grave care and
complete subservience to the government nanny state, others want a culture
that walks in lockstep and speaks only with intonations of political
correctness. I view the American liberals in much the same way I view the
competing factions of Islamic
fundamentalists. The latter hate each other to the core, and only join
forces to attack the US or Israel. The former hate themselves to the core,
and only join forces to attack George Bush and conservatives." --Ron Marr
On Thu, 10 Apr 2008 04:42:23 -0400, R.H. wrote:
> Set number 227 has just been posted:
Without having seen anybody else's guesses:
#1271 looks like either a farm implement (we've had a few of those
lately, dealing with milking cows), or a torture implement.
#1273 My first guess was an old exacto-knife style device for removing
glued-on papers from a surface, but I'd expect the head of the device to
pivot for that.
#1274 is obviously a clip-on penlight for use after nuclear war (for
non-US readers, the CD in the triangle stands for "Civil Defense"; I
don't think I've seen that design in anything original after the 1960s,
though)
#1275 are the fork and rope attached to the metal? If not, I'd say this
is a piece of protective gating that goes around the trunk of a tree in
a park or something similar.
--
Ted S
fedya at bestweb dot net
Now blogging at http://justacineast.blogspot.com
"DoN. Nichols" <[email protected]> wrote in message
news:[email protected]...
> On 2008-04-12, Gunner <[email protected]> wrote:
>> On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
>> wrote:
>>
>>>On 2008-04-11, Gunner <[email protected]> wrote:
>
> [ ... ]
>
>>>> I have several sets of these, along with other rad detectors, which I
>>>> keep in working shape.
>>>
>>> I've got a couple of related ones. They have the HV friction
>>>charger built-in. One holds a charge nicely, the other leaks down
>>>fairly quickly.
>
> [ ... ]
>
>> Friction Charger? Ive never seen one of those
>
> It is a cylinder turned by a knob which turns inside a
> dissimilar material to generate a high voltage static charge (very low
> current however). It is sort of like rubbing a glass rod with silk to
> generate high voltage sparks.
>
> How do the separate chargers for the ones shown in the puzzle
> work?
>
> Enjoy,
> DoN.
The ones i have taken apart and studied consist of a transistor oscillator
driving a transformer to generate the high voltage which is then rectified
and fed into a filter capacitor. As i recall they required a single D cell
to work. The problem with the battery operated units is that most of them
came with batteries that eventually leaked. When the units were tested
upon reciept the people in charge for the most part left the batteries
installed
eventually corroding the guts of the charger making them useless in the
event
they were ever needed.
Best Regards
Tom.
> #1275 are the fork and rope attached to the metal? If not, I'd say this
> is a piece of protective gating that goes around the trunk of a tree in
> a park or something similar.
The fork is not attached to the larger metal piece, but there are two straps
on both the top and bottom. It wasn't made to be used for protecting trees
or anything else.
Rob
"Lee Michaels" <[email protected]> wrote in message
news:[email protected]...
>
> "R.H." <[email protected]> wrote in message
> news:[email protected]...
>>A couple of very obscure items this week, I posted one extra since I had
>>already used an animal poke last year. The answers along with a few links
>>can be seen at this address:
>>
>> http://pzphotosans227t.blogspot.com/
>>
>>
> What is a weather board?
Timber that is milled into a profile which interlocks with the (identical)
board above and below it, forming a weather proof (resistant) barrier.
Simpler:
Boards of timber used to clad a house.
Usually (where I live) about 6-8" wide and as long as possible.
Nowadays often made of aluminium.
--
Jeff R.
"Lee Michaels" <[email protected]> wrote in message
news:[email protected]...
>
> "R.H." <[email protected]> wrote in message
> news:[email protected]...
>>A couple of very obscure items this week, I posted one extra since I had
>>already used an animal poke last year. The answers along with a few links
>>can be seen at this address:
>>
>> http://pzphotosans227t.blogspot.com/
>>
>>
> What is a weather board?
Weatherboards were place horizontally on the outside of timber framed
buildings as weather protection, and were usually thicker than clapboards.
Rob
On Apr 10, 3:42=A0am, "R.H." <[email protected]> wrote:
> Set number 227 has just been posted:
>
> http://puzzlephotos.blogspot.com/
>
> Rob
1271 is a device that is slipped over the head and neck of a cow. This
prevents her from reaching through barbed wire fences and munching on
grass on the other side of the fence.
My Dad also used the device on our milk cows. Since we always fed our
milking cows grain when we ran them into the milking parlor he used
this device to keep the milk cows from eating more grain by sticking
their heads in the feed bunk and taking feed reserved for the beef
cattle. The sharp points poke into the cow's neck when she sticks her
head in between a feed bunk or wire fence yet when she is locked into
a stanchion while milking the points on the yoke won't jab her.
DL
On 11 Apr, 05:10, Fred the Red Shirt <[email protected]> wrote:
> I should say they were still used in the US. The Soviets pretty much
> never used them which is why the lost as many people a they did
> at Chernobyl. $10.00 each, dirt simple technology to save a life.
They wouldn't work for Chernobyl anyway. They're OK for direct
radiation, almost no use for alpha-emitting dust, which is what the
practical hazard was after Chernobyl (for anyone outside the "You're
screwed anyway, Comrade Hero" range).
On 12 Apr 2008 21:39:10 GMT, "DoN. Nichols" <[email protected]>
wrote:
> Speaking of CD -- are there still CD markers on any modern AM
>radio dials? :-)
Nope - they quit that in the 70's.
We don't have to worry about a swarm of Russkie Bombers coming over
the Polar Route "DEW Line" using commercial AM Radio stations for
Radio Direction Finding to home in on our big cities and deliver us a
"Nookular Present" - they have GPS now, and even dead reckoning can be
done much better.
Synopsis: The whole idea behind "CONtrol of ELectronic RADiation"
was that ALL broadcast TV and radio stations, aircraft beacons, Ham,
Public Service and Business two-way radio would shut down. Total
Radio Silence, all bands. No fixed point signals to home in on.
And many of the larger AM radio stations would have hot TX crystal
ovens and pre-tested tower tuning points (the red-painted spots on the
loading coils and tuning knobs) for quickly switching over to either
640 or 1240 KHz non-directional.
The only radio you would hear would be the regional Civil Defense
emergency instructions as the various stations all swapped off
transmitting them round-robin every few minutes, not announcing call
signs or locations.
RDF doesn't work worth beans if they can turn off every signal you
could use, and the few that remain shift location by 25 miles or more
in a random pattern every 3 minutes.
--<< Bruce >>--
PS: Hold the flames. Yes, I realize that even back then when they
treated the Cold War seriously there is no WAY they could get 100% of
the transmitters turned off for hours - they'd have to send someone
out to the hilltop repeaters and rural translators and physically cut
the cords, and search out the saboteurs sending homing signals... But
CONELRAD was still a sound idea - /for it's time/.
"R.H." <[email protected]> wrote in message
news:[email protected]...
> Set number 227 has just been posted:
>
> http://puzzlephotos.blogspot.com/
>
>
> Rob
>
1274 dosimeter used to measure exposure to nuclear radiation. The charging
unit is missing.
They date back to the duck and cover days of the cold war and were part of
radilocical survey
package issued to the civil defense, hense the CD marking.
Best Regards
Tom.
"R.H." <[email protected]> wrote in message
news:[email protected]...
>A couple of very obscure items this week, I posted one extra since I had
>already used an animal poke last year. The answers along with a few links
>can be seen at this address:
>
> http://pzphotosans227t.blogspot.com/
>
>
What is a weather board?
"R.H." <[email protected]> writes:
>Set number 227 has just been posted:
>
>http://puzzlephotos.blogspot.com/
>
>
>Rob
1274 is a dosimeter, several of which were part of the
typical civil defense shelter gear; there is also
a base-unit to reset the dosimeter (not pictured).
TwoGuns <[email protected]> fired this volley in news:6c7f2770-9b5a-
[email protected]:
> http://puzzlephotos.blogspot.com/
1274 is a dosimeter like the ones I trained for in 1962-5. This particular
model is resettable ("re-chargable" is the right word. It used a tiny
version of a electroscope with a static charge to hold two filaments apart
in a vacuum. Ionizing radiation would discharge them, and allow the
filaments to close together. A graticule showed the dose.).
LLoyd
"R.H." <[email protected]> wrote in message
news:[email protected]...
> Set number 227 has just been posted:
>
> http://puzzlephotos.blogspot.com/
>
>
> Rob
1272 A log graders hammer?
On Thu, 10 Apr 2008 21:10:08 -0700 (PDT), Fred the Red Shirt
<[email protected]> wrote:
>On Apr 10, 9:42 am, "azotic" <[email protected]> wrote:
>> "R.H." <[email protected]> wrote in message
>>
>> news:[email protected]...
>>
>> > Set number 227 has just been posted:
>>
>> >http://puzzlephotos.blogspot.com/
>>
>> > Rob
>>
>> 1274 dosimeter used to measure exposure to nuclear radiation. The charging
>> unit is missing.
>> They date back to the duck and cover days of the cold war and were part of
>> radilocical survey
>> package issued to the civil defense, hense the CD marking.
>
>Yes. It is based on the Leydon jar or electroscope. The device is an
>air-spaced capacitor, and the rate at which it loses charge depends on
>the electrical conductivity of the gas inside. Exposure to ionizing
>radiation
>ionizes the gas (doh!) making it more conductive. Usually there is a
>little
>scale inside viewable through the lense so that it may be read
>directly.
>
>They were still used as late as the 1980s as they could be directly
>read without any processing unlike a film badge or crystal dosimeter.
>
>I should say they were still used in the US. The Soviets pretty much
>never used them which is why the lost as many people a they did
>at Chernobyl. $10.00 each, dirt simple technology to save a life.
I have several sets of these, along with other rad detectors, which I
keep in working shape.
Gunner
On Apr 10, 9:42 am, "azotic" <[email protected]> wrote:
> "R.H." <[email protected]> wrote in message
>
> news:[email protected]...
>
> > Set number 227 has just been posted:
>
> >http://puzzlephotos.blogspot.com/
>
> > Rob
>
> 1274 dosimeter used to measure exposure to nuclear radiation. The charging
> unit is missing.
> They date back to the duck and cover days of the cold war and were part of
> radilocical survey
> package issued to the civil defense, hense the CD marking.
Yes. It is based on the Leydon jar or electroscope. The device is an
air-spaced capacitor, and the rate at which it loses charge depends on
the electrical conductivity of the gas inside. Exposure to ionizing
radiation
ionizes the gas (doh!) making it more conductive. Usually there is a
little
scale inside viewable through the lense so that it may be read
directly.
They were still used as late as the 1980s as they could be directly
read without any processing unlike a film badge or crystal dosimeter.
I should say they were still used in the US. The Soviets pretty much
never used them which is why the lost as many people a they did
at Chernobyl. $10.00 each, dirt simple technology to save a life.
--
FF
"Lloyd E. Sponenburgh" <lloydspinsidemindspring.com> writes:
>TwoGuns <[email protected]> fired this volley in news:6c7f2770-9b5a-
>[email protected]:
>
>> http://puzzlephotos.blogspot.com/
>
>1274 is a dosimeter like the ones I trained for in 1962-5. This particular
>model is resettable ("re-chargable" is the right word. It used a tiny
>version of a electroscope with a static charge to hold two filaments apart
>in a vacuum. Ionizing radiation would discharge them, and allow the
>filaments to close together. A graticule showed the dose.).
>
>LLoyd
Yup. Mine has pegged on the high end after 40+ years since 'recharge',
just from background.
scott
hi all,
1270 umph, i dont know the word for. you take a rope, put it throug this
little thing. then you pull at one end of the rope, and it can´t slip back,
even when something is drawing heavily at the other end. "self locking"
1274 hand held microscope or tiny telescope?
the others, hmm, no idea
greetings from germany
chris
In article <[email protected]>,
"R.H." <[email protected]> wrote:
> Set number 227 has just been posted:
>
> http://puzzlephotos.blogspot.com/
Let's see...as usual, guesses made without much actual knowledge.
1269 -- This would seemingly be used to trim something, perhaps
photographs prior to mounting. The perforations on the arm with the
sliding cutter seem to be arranged in inches, half inches, quarter
inches, and selected eighth inches, and so would either make a measuring
guide or a means for drawing parallel lines at whatever intervals are
desired.
1270 -- This looks a lot like an oversized version of the mechanism many
window blinds use to lock the height adjusting strings. I suspect it
would be used to similar ends on a larger scale; the hook gets hung up
(probably from a chain), and a rope is passed through the middle of the
mechanism, where it works rather like a ratchet to allow something to be
raised to a height but not lowered again until released. The "rope" may
well be wire rope based on the generally massive character of the
casting.
1271 -- Ummm...this seems to be a stand or support for something,
adjustable to three different diameters of somethings. The unfolded
picture is, I assume, of the something stand upside down, as the stops
for the hinged parts would avoid collapse with it the other way around
and the upturned bits at the far end of the extended arms keep the
something from moving too far. The pointy prongs at the root of the
forks are presumably to keep the something stand in place, either by
driving them into wood or by letting them work into the ground.
What sort of somethings would you hold with one of these? I don't know,
although I can picture a vessel like a cauldron or a frying pan.
1272 -- Possibly a marking hammer for indicating the owner of pulpwood
logs (or any logs, I guess)?
1273 -- The body of this contraption appears to be a torch of some sort.
Maybe it's a castrating tool to turn, say, a bull into a steer while
cauterizing the wound in the same operation.
1274 -- This may be half of a cheap pocket telescope.
1275 -- Possibly a holder for birdshot for a muzzle-loading firearm? if
so, I'd expect there must be a collection of a dozen or so end caps
somewhere.
Now to see other guesses...
--
Andrew Erickson
"He is no fool who gives what he cannot keep to gain that which he cannot
lose." -- Jim Elliot
On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
wrote:
>On 2008-04-11, Gunner <[email protected]> wrote:
>> On Thu, 10 Apr 2008 21:10:08 -0700 (PDT), Fred the Red Shirt
>><[email protected]> wrote:
>>
>>>On Apr 10, 9:42 am, "azotic" <[email protected]> wrote:
>
> [ ... ]
>
>>>> 1274 dosimeter used to measure exposure to nuclear radiation. The charging
>>>> unit is missing.
>
> [ ... ]
>
>>>Yes. It is based on the Leydon jar or electroscope. The device is an
>>>air-spaced capacitor, and the rate at which it loses charge depends on
>>>the electrical conductivity of the gas inside.
>
> [ ... ]
>
>>>They were still used as late as the 1980s as they could be directly
>>>read without any processing unlike a film badge or crystal dosimeter.
>>>
>>>I should say they were still used in the US. The Soviets pretty much
>>>never used them which is why the lost as many people a they did
>>>at Chernobyl. $10.00 each, dirt simple technology to save a life.
>>
>>
>> I have several sets of these, along with other rad detectors, which I
>> keep in working shape.
>
> I've got a couple of related ones. They have the HV friction
>charger built-in. One holds a charge nicely, the other leaks down
>fairly quickly.
>
> Enjoy,
> DoN.
Friction Charger? Ive never seen one of those
Gunner
On 2008-04-10, R.H. <[email protected]> wrote:
> Set number 227 has just been posted:
>
> http://puzzlephotos.blogspot.com/
Posting from rec.crafts.metalworking as always.
1269) No idea on this one. Perhaps the holes at a given level
are for marking off a specific number of divisions per inch.
1270) Some sort of load binder -- a strap threads through and around
the smooth pulley. The serrated one swings in to lock it in
position along the strap.
1271) No clue -- and not even a guess on this one.
1272) A hammer blow to the back marks the path of two grooves
at right angles in wood prior to the grooves being cut
by a chisel.
1273) Some kind of whistle -- perhaps to indicate overpressure in
a steam engine?
1274) A dosimeter -- to tell how much radioactive exposure an
individual has received. Obviously, this one is part of
a Civil Defense kit which included one per user, plus at least
one Geiger counter.
Now to see what others have guessed.
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
On 2008-04-11, Gunner <[email protected]> wrote:
> On Thu, 10 Apr 2008 21:10:08 -0700 (PDT), Fred the Red Shirt
><[email protected]> wrote:
>
>>On Apr 10, 9:42 am, "azotic" <[email protected]> wrote:
[ ... ]
>>> 1274 dosimeter used to measure exposure to nuclear radiation. The charging
>>> unit is missing.
[ ... ]
>>Yes. It is based on the Leydon jar or electroscope. The device is an
>>air-spaced capacitor, and the rate at which it loses charge depends on
>>the electrical conductivity of the gas inside.
[ ... ]
>>They were still used as late as the 1980s as they could be directly
>>read without any processing unlike a film badge or crystal dosimeter.
>>
>>I should say they were still used in the US. The Soviets pretty much
>>never used them which is why the lost as many people a they did
>>at Chernobyl. $10.00 each, dirt simple technology to save a life.
>
>
> I have several sets of these, along with other rad detectors, which I
> keep in working shape.
I've got a couple of related ones. They have the HV friction
charger built-in. One holds a charge nicely, the other leaks down
fairly quickly.
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
On 2008-04-12, Gunner <[email protected]> wrote:
> On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
> wrote:
>
>>On 2008-04-11, Gunner <[email protected]> wrote:
[ ... ]
>>> I have several sets of these, along with other rad detectors, which I
>>> keep in working shape.
>>
>> I've got a couple of related ones. They have the HV friction
>>charger built-in. One holds a charge nicely, the other leaks down
>>fairly quickly.
[ ... ]
> Friction Charger? Ive never seen one of those
It is a cylinder turned by a knob which turns inside a
dissimilar material to generate a high voltage static charge (very low
current however). It is sort of like rubbing a glass rod with silk to
generate high voltage sparks.
How do the separate chargers for the ones shown in the puzzle
work?
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
On 2008-04-12, azotic <[email protected]> wrote:
>
> "Gunner" <[email protected]> wrote in message
> news:[email protected]...
>> On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
>> wrote:
[ ... ]
>>> I've got a couple of related ones. They have the HV friction
>>>charger built-in. One holds a charge nicely, the other leaks down
>>>fairly quickly.
>> Friction Charger? Ive never seen one of those
[ ... ]
> I have seen the piezo charger but never seen one with a buit-in charger.
> Could you post a pix of your unit don ? I would really like to see what one
> looks like.
I would be glad to -- if I could find them. Right now, they are
in the metal housing with the serious Navy surplus Geiger Counter (more
ranges than the little CD ones, and a separate hand-held probe for the
more sensitive ranges. (There is a second, smaller, tube inside the
housing just behind a dimple designed to mark its location.)
Anyway -- I'll try my hand at ASCII graphics to show what they
are like. Be sure to view with a fixed pitch font (like Courier) to
avoid image distortion.
+----------+
++----------------------------------+ |
|| | | <--- Glass/Quartz
++----------------------------------+ | Window
^ +--+| |
| +| || |
Eyepiece / +| || |
Knob----------- +--+| |
+----------+
The knob is threaded onto a flange on the housing. You unscrew it about
a turn and it pops out a short distance. Once you have done that,
turning clockwise moves the pointer towards zero, and turning counter
clockwise moves it towards full scale (500 mR IIRC). Once you have
reached zero, press in with your thumb on the raised center portion of
the knob, and turn it clockwise to thread it back onto the flange so
bumping it won't change the reading.
The whole thing is painted black, except the maker's label, and
a stainless steel spring clip to hold it in your pocket on the opposite
side of the housing at the big end.
The housing is not square when viewed from the end, but rather
two semi-circles joined with straight lines.
> If anyones intrested heres a link to what the hand held piezo charger looks
> like,
> it the one with the handle you squeeze.
>
> http://www.civildefensemuseum.com/cdmuseum2/radkits/cdv750/cdv750s.jpg
I suspect that the one at the lower-left with the pot-metal knob
and the one in the bottom middle with the black knob work in a fashion
similar to mine. But they are a lot larger. I guess that these were
for people who knew enough not to reset the one they were wearing in the
middle of an operation. :-)
Speaking of CD -- are there still CD markers on any modern AM
radio dials? :-)
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
On 2008-04-13, azotic <[email protected]> wrote:
>
> "DoN. Nichols" <[email protected]> wrote in message
> news:[email protected]...
>> On 2008-04-12, Gunner <[email protected]> wrote:
>>> On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
>>> wrote:
[ ... ]
>>>> I've got a couple of related ones. They have the HV friction
>>>>charger built-in. One holds a charge nicely, the other leaks down
>>>>fairly quickly.
>>
>> [ ... ]
>>
>>> Friction Charger? Ive never seen one of those
>>
>> It is a cylinder turned by a knob which turns inside a
>> dissimilar material to generate a high voltage static charge (very low
>> current however). It is sort of like rubbing a glass rod with silk to
>> generate high voltage sparks.
>>
>> How do the separate chargers for the ones shown in the puzzle
>> work?
[ ... ]
> The ones i have taken apart and studied consist of a transistor oscillator
> driving a transformer to generate the high voltage which is then rectified
> and fed into a filter capacitor. As i recall they required a single D cell
> to work. The problem with the battery operated units is that most of them
> came with batteries that eventually leaked. When the units were tested
> upon reciept the people in charge for the most part left the batteries
> installed
> eventually corroding the guts of the charger making them useless in the
> event
> they were ever needed.
Ouch! They wanted to be "ready". :-)
It is certainly different from mine, as there was no separate
battery so the power had to come from physical energy put into the unit.
Luckly, it did not take much energy. :-)
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
"Gunner" <[email protected]> wrote in message
news:[email protected]...
> On 11 Apr 2008 22:24:59 GMT, "DoN. Nichols" <[email protected]>
> wrote:
>
>>On 2008-04-11, Gunner <[email protected]> wrote:
>>> On Thu, 10 Apr 2008 21:10:08 -0700 (PDT), Fred the Red Shirt
>>><[email protected]> wrote:
>>>
>>>>On Apr 10, 9:42 am, "azotic" <[email protected]> wrote:
>>
>> [ ... ]
>>
>>>>> 1274 dosimeter used to measure exposure to nuclear radiation. The
>>>>> charging
>>>>> unit is missing.
>>
>> [ ... ]
>>
>>>>Yes. It is based on the Leydon jar or electroscope. The device is an
>>>>air-spaced capacitor, and the rate at which it loses charge depends on
>>>>the electrical conductivity of the gas inside.
>>
>> [ ... ]
>>
>>>>They were still used as late as the 1980s as they could be directly
>>>>read without any processing unlike a film badge or crystal dosimeter.
>>>>
>>>>I should say they were still used in the US. The Soviets pretty much
>>>>never used them which is why the lost as many people a they did
>>>>at Chernobyl. $10.00 each, dirt simple technology to save a life.
>>>
>>>
>>> I have several sets of these, along with other rad detectors, which I
>>> keep in working shape.
>>
>> I've got a couple of related ones. They have the HV friction
>>charger built-in. One holds a charge nicely, the other leaks down
>>fairly quickly.
>>
>> Enjoy,
>> DoN.
>
> Friction Charger? Ive never seen one of those
>
> Gunner
>
I have seen the piezo charger but never seen one with a buit-in charger.
Could you post a pix of your unit don ? I would really like to see what one
looks like.
If anyones intrested heres a link to what the hand held piezo charger looks
like,
it the one with the handle you squeeze.
http://www.civildefensemuseum.com/cdmuseum2/radkits/cdv750/cdv750s.jpg
Best Regards
Tom.