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Topic: Bolex M8 Rotary Switch
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Josef Grassmann
Expert Film Handler
Posts: 190
From: Hennef-Sieg, Germany
Registered: Apr 2005
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posted June 30, 2014 04:08 PM
Take care automotive switches are often designed for up to 30V DC and not for high voltage 120/240V AC
As far as I remember the knob is moulded to axle!!
But switch gets very, very seldom defective. There is a tricky mechanism. If you push knob inwards and turn,inside a plate with pin rotates and slides into 3 or 4 different slots. It depends on slot, so it might happen, that you can turn on motor but no turn on of bulb.
Solution: Push knob and turn fully clockwise until it rest into a slot (inside, not visible) again. Now turn knob fully counterclockwise without pushing in. Now switch should work normaly as expected.
If still in doubt remove cover plate from foot (6 or 7 screws) and watch mechanical movement when you do as mentioned before.
Than you will understand how it works.
3 sets of contacts are direct visible and you can inspect and clean them if required, too.
There are 2 screws on backside of switch. When you remove them you can dismantle switch, spring, plate with slots and axle with knob. I guess, will not be neccessary.
regards
Josef
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Eric Shepherd
Film Handler
Posts: 34
From: Southport, England
Registered: Jun 2014
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posted July 01, 2014 12:59 AM
Hi Joseph.
Thank you for your reply.
However, things have moved on now & I'd better explain more my reasons for needing to remove the switch. The projector is being stripped of all the original electrical & mechanical components & converted to a lamp. I did this last year with a redundant later model M8, see attached picture. I needed to remove the original switch to give me a bare casting so it could be sprayed a different colour, (olive drab isn't lamp friendly.) I eventually bit the bullet with this one & broke the switch knob, which look as if it had been pressed onto the knurled portion of the switch actuation shaft. On last years model, the colour was ok so the problem didn't arise & I used the original switch, with one pole to power a mains voltage lamp & a second pole to power an LED driver for 3 auxiliary LED lamps, which could be switched independently. The current M8 project has been set to one side after I found the cost of spraying would take the overall costs of the project above what I consider a reasonable price for a lamp. Currently I have just finished converting a Kodascope L from 1935, you can see it on Youtube at
https://www.youtube.com/watch?v=rn1jVFil6yw
You will probably frown on my actions, however I look at it this way, when an article is past its best, do we throw it on the scrap heap or, put it to a new use, in my opinion I am preserving our past so it will not be forgotten.
Regards Eric.
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A picture is worth a thousand words
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted July 01, 2014 09:03 AM
Hi Eric,
I doubt that you will get much appreciation for your project on this forum. Most people here believe there is no projector anywhere that cannot be repaired and brought back into useful service, and I am sure that is true of the iconic Bolex M8 that you have turned into a room lamp. It may be a novelty, and is surely a conversation piece, but how much more interesting would a fully restored and working projector be. ![[Frown]](frown.gif)
Rather than ruining an incredible piece of high precision film equipment, do as I did, and buy a piece of Chinese junk ( modelled after the 9.5mm Pathe Lux) for $19.95:
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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj
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Eric Shepherd
Film Handler
Posts: 34
From: Southport, England
Registered: Jun 2014
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posted July 01, 2014 11:37 AM
At the moment I have 5 projects awaiting conversion, No1 is the Bolex H16 cine camera, (gasps of horror) unfortunately it has been dropped & twisted the chassis & backplate, letting in light, so IMO un-repairable. The second is the M8 which started this thread, the third is a B&H 613 16mm with burned out innards, a Bencini Comet 111 cine camera which I had never heard of but thought would make a good art deco style lamp & finally a B&H Filmo Sportster which I spotted on Ebay just before I went to bed last night for £5, couldn't resist it. There is one more projector which is a must have, if I get it I'll report back.
Eric
Bencini pictured.
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A picture is worth a thousand words
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