keeping electrical conductivity on screw thread

[PCPaul]

On Fri, 05 Jun 2009 21:29:54 +0100, john royce wrote:

"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?

Depends how sturdy it is. If it's an AA-battery sized torch then probably
just a quick 'bite' or a gentle tap with a block of wood would do the
job. If it's more solid then a (padded) hammer could do it.

The intention is just to make it very slightly out of round, so it makes
a good solid connection and can't rattle loose.

 

[Jim Yanik]

PCPaul <urd3@bitrot.co.uk> wrote in
news:gDPWl.39091$OO7.29837@text.news.virginmedia.com:

On Fri, 05 Jun 2009 21:29:54 +0100, john royce wrote:

"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?

Depends how sturdy it is. If it's an AA-battery sized torch then
probably just a quick 'bite' or a gentle tap with a block of wood
would do the job. If it's more solid then a (padded) hammer could do
it.

The intention is just to make it very slightly out of round, so it
makes a good solid connection and can't rattle loose.

just ding the threads slightly and it will be tight and electrically
connected.
It's SO simple. just a tap with a hammer.

--
Jim Yanik
jyanik
at
kua.net