Morrison’s Patent “Facile” Electric shade remover - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Terry_VK5TM · 23rd Nov 2018, 12:13 am

Quote:

Originally Posted by Herald1360

There's also no need for their being done up tight anyway.

The way this house shakes, rattles and rolls when a freight train comes through, I wouldn't be too sure about that

Graham G3ZVT · 23rd Nov 2018, 1:26 am

Does anyone do a special tool for retracting the "mouse trap" style springs that hold modern glass shades.

One false move and you've got glass splinters flying everywhere, and don't ask me how I know that

Herald1360 · 23rd Nov 2018, 10:38 am

Leather gloves and safety glasses?

russell_w_b · 23rd Nov 2018, 11:45 am

Quote:

Originally Posted by rambo1152

Does anyone do a special tool for retracting the "mouse trap" style springs that hold modern glass shades.

Sacrificial zip-tie?

Phil G4SPZ · 25th Nov 2018, 10:29 pm

A third hand?

As promised, here are a couple of pics of a more sophisticated device. The opening dimension and closing tension is adjustable by means of the handy wing-nut provided. No brand name is apparent. Someone has suggested it could alternatively be an antique champagne cork-puller...

Phil

emeritus · 26th Nov 2018, 10:52 pm

It resembles GEC's 1912 GEC "shade fixer" ( #12).

Phil G4SPZ · 27th Nov 2018, 12:38 am

Yes, I think you’re right. Mystery solved!

Andrew B · 27th Nov 2018, 10:27 pm

Quote:

Originally Posted by Refugee

I can't remember the pipe size now but the old ones were brittle plastic and had turned to dust.

That sparked a distant memory, I believe that the shade holder thread is on BSG,

British standard (copper) gas thread, a real throw-back.

Refugee · 27th Nov 2018, 11:13 pm

It was the nut that compresses the olive on a 22mm fitting if my memory serves me right.
The lamp is still working with home made LED bulbs in it.
They are E14 threads and in early 2010 lamps with a good spread of light were not available so I made some.

emeritus · 27th Nov 2018, 11:28 pm

I think the thread is 26tpi, used for all sizes of brass tube. An account of how the brass BC lampholder dimensions and thread were decided on was recounted in an issue of the GEC house journal some years ago, but I can't lay my hands on my copy at present.

According to Machinery's screw thread book, 26tpi British "Standard" Brass Thread was never an official standard, but was generally followed in the UK and Germany. The Leica camera lens screw thread has this pitch rather than the very close 1mm pitch.

23rd Nov 2018, 1:26 am	#22
Graham G3ZVT Dekatron Join Date: May 2010 Location: Greater Manchester, UK. Posts: 18,710	Re: Morrison’s Patent “Facile” Electric shade remover Does anyone do a special tool for retracting the "mouse trap" style springs that hold modern glass shades. One false move and you've got glass splinters flying everywhere, and don't ask me how I know that __________________ -- Graham. G3ZVT

23rd Nov 2018, 10:38 am	#23
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: Morrison’s Patent “Facile” Electric shade remover Leather gloves and safety glasses? __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

25th Nov 2018, 10:29 pm	#25
Phil G4SPZ Dekatron Join Date: Apr 2005 Location: Bewdley, Worcestershire, UK. Posts: 4,748	Re: Morrison’s Patent “Facile” Electric shade remover A third hand? As promised, here are a couple of pics of a more sophisticated device. The opening dimension and closing tension is adjustable by means of the handy wing-nut provided. No brand name is apparent. Someone has suggested it could alternatively be an antique champagne cork-puller... Phil Attached Thumbnails __________________ Phil Optimist [n]: One who is not in possession of the full facts

26th Nov 2018, 10:52 pm	#26
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,337	Re: Morrison’s Patent “Facile” Electric shade remover It resembles GEC's 1912 GEC "shade fixer" ( #12).

27th Nov 2018, 12:38 am	#27
Phil G4SPZ Dekatron Join Date: Apr 2005 Location: Bewdley, Worcestershire, UK. Posts: 4,748	Re: Morrison’s Patent “Facile” Electric shade remover Yes, I think you’re right. Mystery solved! __________________ Phil Optimist [n]: One who is not in possession of the full facts

27th Nov 2018, 11:13 pm	#29
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Morrison’s Patent “Facile” Electric shade remover It was the nut that compresses the olive on a 22mm fitting if my memory serves me right. The lamp is still working with home made LED bulbs in it. They are E14 threads and in early 2010 lamps with a good spread of light were not available so I made some.

27th Nov 2018, 11:28 pm	#30
emeritus Dekatron Join Date: Jan 2012 Location: Brentwood, Essex, UK. Posts: 5,337	Re: Morrison’s Patent “Facile” Electric shade remover I think the thread is 26tpi, used for all sizes of brass tube. An account of how the brass BC lampholder dimensions and thread were decided on was recounted in an issue of the GEC house journal some years ago, but I can't lay my hands on my copy at present. According to Machinery's screw thread book, 26tpi British "Standard" Brass Thread was never an official standard, but was generally followed in the UK and Germany. The Leica camera lens screw thread has this pitch rather than the very close 1mm pitch.