keeping electrical conductivity on screw thread

J

john royce

Guest
I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.
 
On Fri, 05 Jun 2009 21:22:33 +0100, john royce wrote:

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess that rules out putting a dab of wood glue on the thread?

Sounds like a gentle squish of the end cap will do the job...
 
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.


run a rough file over the threads
 
All forwarded text?

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"john royce" <bluestar@mail.invalid> wrote in message
news:h0buqg$lsd$1@news.eternal-september.org...

I have one of those small LED pocket torches (flashlight).
To turn it on
and off, I have to screw the end up towards the bulb end
to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit
and tends to
'unscrew or scew up' when it sits in the car glove
compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread,
without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to
work, so I guess
that rules out putting a dab of wood glue on the thread?
Thanks for
any
advice.
 
Stormin Mormon wrote:
All forwarded text?


I have one of those small LED pocket torches (flashlight).
To turn it on
and off, I have to screw the end up towards the bulb end
to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit
and tends to
'unscrew or scew up' when it sits in the car glove
compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread,
without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to
work, so I guess
that rules out putting a dab of wood glue on the thread?
Thanks for
any
advice.
wrap a bit of foil around the threads.
 
On Fri, 5 Jun 2009 17:15:21 -0400, "Stormin Mormon"
<cayoung61**spamblock##@hotmail.com> wrote:

All forwarded text?
He's got a screw loose. Didn't you read the post?
 
On Fri, 5 Jun 2009 21:22:33 +0100, "john royce"
<bluestar@mail.invalid> wrote:

I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.

If this is a typical Maglite then trash it. The switch mechanism will
never be trouble free after the light is a few years old.
 
"Blah" <blah@hotmail.com> wrote in message
news:78teaiF1oatv6U1@mid.individual.net...
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it
on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.


run a rough file over the threads
Wrap a few turns of Teflon pipe thread tape around the male threads so that
the looseness is removed. You might have to rewrap frequently, depending on
how much use the flashlight gets.
Another suggestion is to cut a gasket out of a sheet of very thin rubber or
vinyl sheet, lube it with silicone grease and wrap the gasket around the
threads.

--
Dave M
masondg44 at comcast dot net

One good thing about Alzheimer's; you get to meet new people every day.
 
Dave M wrote:
"Blah" <blah@hotmail.com> wrote in message
news:78teaiF1oatv6U1@mid.individual.net...
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it
on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.

run a rough file over the threads

Wrap a few turns of Teflon pipe thread tape around the male threads so that
the looseness is removed. You might have to rewrap frequently, depending on
how much use the flashlight gets.
Another suggestion is to cut a gasket out of a sheet of very thin rubber or
vinyl sheet, lube it with silicone grease and wrap the gasket around the
threads.

won't that insulate it? ...
 
"Blah" <blah@hotmail.com> wrote in message
news:78trddF1nh2hqU1@mid.individual.net...
Dave M wrote:
"Blah" <blah@hotmail.com> wrote in message
news:78teaiF1oatv6U1@mid.individual.net...
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it
on
and off, I have to screw the end up towards the bulb end to compress
the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess
that rules out putting a dab of wood glue on the thread? Thanks
for any
advice.

run a rough file over the threads

Wrap a few turns of Teflon pipe thread tape around the male threads so
that the looseness is removed. You might have to rewrap frequently,
depending on how much use the flashlight gets.
Another suggestion is to cut a gasket out of a sheet of very thin rubber
or vinyl sheet, lube it with silicone grease and wrap the gasket around
the threads.

won't that insulate it? ...
Actually, no. The contact between the lens housing and the body of the unit
is actually made by the end of the body and a mating surface on the lens
housing. If the Teflon tape is confined to the threads, the contact should
be good. Also, the Teflon tape is extremely thin and is easily torn by the
threads; providing more contact surface.
The idea I was trying to suggest is to fill the gaps in the threads,
reducing the tendency for it to unscrew itself.
--
Dave M
masondg44 at comcast dot net

One good thing about Alzheimer's; you get to meet new people every day.
 
"PCPaul" <urd3@bitrot.co.uk> wrote in message
news:GafWl.38371$OO7.429@text.news.virginmedia.com...
On Fri, 05 Jun 2009 21:22:33 +0100, john royce wrote:

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess that rules out putting a dab of wood glue on the thread?


Sounds like a gentle squish of the end cap will do the job...
Thanks. could you explain to a novish 'squish' ? would i need to do a
degree course?
 
Blah wrote:
Dave M wrote:
"Blah" <blah@hotmail.com> wrote in message
news:78teaiF1oatv6U1@mid.individual.net...
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn
it on
and off, I have to screw the end up towards the bulb end to
compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for
a while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so
I guess
that rules out putting a dab of wood glue on the thread? Thanks
for any
advice.

run a rough file over the threads

Wrap a few turns of Teflon pipe thread tape around the male threads so
that the looseness is removed. You might have to rewrap frequently,
depending on how much use the flashlight gets.
Another suggestion is to cut a gasket out of a sheet of very thin
rubber or vinyl sheet, lube it with silicone grease and wrap the
gasket around the threads.

won't that insulate it? ...
If it IS a real MagLite, OP is mistaken about it being part of the
circuit. You can actually take the nose off and use it as a base, and
use the flashlight as a candle. (leastways, on the pre-LED versions) I
suppose there are some knockoffs that use it as part of the circuit, but
I have never seen any. Flickery light is almost always due to an
internal spring getting wimpy.

(Note- even on a full-size Mag, the side switch is repairable. A pain to
get it out, but repairable.)

--
aem sends...
 
On Sat, 06 Jun 2009 02:37:14 GMT, aemeijers <aemeijers@att.net> wrote:

Blah wrote:
Dave M wrote:
"Blah" <blah@hotmail.com> wrote in message
news:78teaiF1oatv6U1@mid.individual.net...
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn
it on
and off, I have to screw the end up towards the bulb end to
compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for
a while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so
I guess
that rules out putting a dab of wood glue on the thread? Thanks
for any
advice.

run a rough file over the threads

Wrap a few turns of Teflon pipe thread tape around the male threads so
that the looseness is removed. You might have to rewrap frequently,
depending on how much use the flashlight gets.
Another suggestion is to cut a gasket out of a sheet of very thin
rubber or vinyl sheet, lube it with silicone grease and wrap the
gasket around the threads.

won't that insulate it? ...
If it IS a real MagLite, OP is mistaken about it being part of the
circuit.
FWIW, the OP didn't say it was a MagLite. (It helps to keep track of
this stuff when I come in late and read the whole thread at once.)


You can actually take the nose off and use it as a base, and
use the flashlight as a candle. (leastways, on the pre-LED versions) I
suppose there are some knockoffs that use it as part of the circuit, but
I have never seen any. Flickery light is almost always due to an
internal spring getting wimpy.

(Note- even on a full-size Mag, the side switch is repairable. A pain to
get it out, but repairable.)
 
On Fri, 5 Jun 2009 21:22:33 +0100, "john royce"
<bluestar@mail.invalid> wrote:

I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?
Bend one of the threads a little bit. Not one at the open end. One 3
threads back, so that you can still use the good threads to start
screwing it on, and they will be enough to pull it on when it gets to
the bad thread.

If you don't do it enough, you can do it more later. (make sure it is
meant to screw on that far.)

If you do it too much, you should be able to clean up the bad thread a
bit by twisting a screwdriver in the groove.

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.
 
Blah wrote:
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn
it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess
that rules out putting a dab of wood glue on the thread? Thanks
for any
advice.


run a rough file over the threads
Hi,
I'd try a piece of Al. ducp tape.
 
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.
Most of these torches have an o'ring on the bit you turn them on
with.Get a new o'ring or one a trifle bigger.
 
On Fri, 05 Jun 2009 18:04:28 -0400, salty@dog.com wrote:
On Fri, 5 Jun 2009 17:15:21 -0400, "Stormin Mormon"
cayoung61**spamblock##@hotmail.com> wrote:

All forwarded text?

He's got a screw loose. Didn't you read the post?
Probably hi-jacked some other thread in one of the cross-posted ng's.
 
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.


Screw the cap over a strip of paper along one side.
 
On Sat, 06 Jun 2009 11:30:06 -0400, E Z Peaces <cash@invalid.invalid>
wrote:

john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I guess
that rules out putting a dab of wood glue on the thread? Thanks for
any
advice.


Screw the cap over a strip of paper along one side.
That sounds good too.
 
Blah wrote:
john royce wrote:
I have one of those small LED pocket torches (flashlight). To turn
it on
and off, I have to screw the end up towards the bulb end to compress the
contacts against the battery.

The thread in the screw end is an extremely 'loose' fit and tends to
'unscrew or scew up' when it sits in the car glove compartment for a
while.

Is there a way to *stiffen* this 'loosness' in the thread, without
reducing
the electrical conductivity?

It needs to make good electrical contact for the torch to work, so I
guess
that rules out putting a dab of wood glue on the thread? Thanks
for any
advice.


run a rough file over the threads
Or insert a piece of dowel, then crush the threads a little with a hammer.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
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