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Author Topic: Wikipedia page for the DP70 Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 03-13-2014 01:02 AM                        We have pictures. Hope they're OK.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-13-2014 12:31 PM                     Looking good... My custom Kelmar change overs are in those DP-70!!  |  IP: Logged Markus Ito Film Handler Posts: 27 From: San Diego, CA, USA Registered: Apr 2011 posted 03-14-2014 12:07 AM                     This looks great! I've learned lots of interesting details about these projectors after reading through the wiki page. The booth at the Egyptian looks like it has everything you can add on to the DP70.  |  IP: Logged Emiel De Jong Film Handler Posts: 48 From: Geldrop The Netherlands Registered: Mar 2007 posted 03-15-2014 07:47 AM                     Just a detail, but: "In the United States, the American Optical Company (the AO in Todd-AO) gave the original version of the DP70 the catalog number EL4000. " The EL numbers were typically given by Philips, for example their "portable" 16mm projector was the EL5000; on my FP20 is a plate with EL4022.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 03-16-2014 11:18 PM                        Many thanks - much appreciated. To avoid the article history log becoming a great long list of entries, each of which is just one minor change, I'm collecting a snagging list and will update the page again, probably in a few days. If you'd like to do so before then, please do - that's the whole point of Wikipedia! I'm assuming that EL4000 was the original, mk. I DP70. If so, what was the EL number for the mk. II (AAII) single motor variant? Many thanks in advance.  |  IP: Logged Thomas Hauerslev Master Film Handler Posts: 451 From: Copenhagen, Denmark Registered: Aug 2000 posted 03-17-2014 04:07 AM                        EL4000/01 & EL4000/00 was always Philips' catalog number. All though the entire delivery (00 was for 50 Hz and 01 was for 60Hz) The machine had 1 motor and a gear to change between 24/30 fps. In the US, they came with 2 motors, one for each frame rate. The 2 motor version was abandoned in favour of the 1 motor version. See the brochures if you like: http://www.in70mm.com/dp70/library/brochures/index.htm Or the German Philips flyer from 1955: http://www.in70mm.com/dp70/library/brochures/philips/Der%20Projector%20DP70.pdf  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 03-17-2014 09:18 AM                       One detail that should be modified is in the description of converting from 35 to 70. It mentions changing the sprockets. It's actually the pad roller assemblies that are changed. There may be a more exact name for this assembly but it's not coming to me at the moment.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-17-2014 12:09 PM                     Two Pad rollers and one gate assembly would be the correct terminology there Sam... There are two pad rollers that are part of the gate. That leaves the upper feed sprocket pad roller and the hold back pad roller to change out. Most of the time the 70mm pad roller just lived on the upper position anyways. Another correction that needs to be made is under "removable components" where it says "detachable reel magazines can be fitted to accommodate the projection of Nitrate film. Where the reel magazines were actually part of the design of the projector and there were actually two sets of fire trap rollers that came with the early projectors sold in the 1950's. One blue set for safety film and one red set for nitrate. The red set has a much smaller gap between the two rollers and barely has any relief in the picture and sound area. The blue set came relieved to accommodate both 35mm and 70mm safety film. The red rollers were probably only included so the projectors would meet the antiquated fire codes still in effect at the time in places like Chicago and Boston. Boston was the most stringent actually requiring double sets of fire trap rollers in projectors. I'm not going to go in and change this around yet until some of you offer some more feedback on exactly how to word the changes. I did make one addition under water cooling and that was the fact that all the copper components were silver plated for maximum heat conductivity. Not may people were aware of this. One batch of dp-70 we rebuilt at Claco we had the cooling plates re-silvered during overhaul. Mark  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-22-2014 05:06 PM                     I finally ran across my old AA-2 Eight page brochure that was dated 1962. This also dates the appearance of the AA-2 version of the DP-70 to 1962. Most are not aware of all the slight differences and the subtle improvements that were made and they include: Changeable 35mm/70mm reel shafts Able to use standard 5" hub reels (take up gearing was different) New Non-Glare Door Window New theading guards on agnetic shield and idler roller. New Improved Intermittent (I've torn down quite a few and never noticed ANY difference!) New Oil Vapor Leak Protection (There were no added seals or anything so it may have been a sealent type of coating applied to the main casting before painting.) New Douser (Essanay Style C/O was adopted) Heavier Main Drive Gear Set New Single Motor Drive New Two Speed clutch New Style Contactor New Lamp house Bracket (Xenon was starting to make inroads) Spiral Gear Take Up Instead Of Straight Bevel Gearing Graphite Impregnated Rollers and Idlers (Switch to black rollers from the white ones.) I have scanned the original brochure and placed it in my drop box. If anyone wants it just send me an IM and I'll send you the link. Mark  |  IP: Logged Paul Vollmers Expert Film Handler Posts: 161 From: Sister Lakes, MI, USA Registered: Jul 2001 posted 03-24-2014 04:24 AM                     Thanks Thomas. I often wondered what AA11 stood for, or where it came from. Although I own a DP70, double motor, 24/30 fps. Wonderful machine....but heavy.  |  IP: Logged Michael Coate Phenomenal Film Handler Posts: 1904 From: Los Angeles, California Registered: Feb 2001 posted 04-10-2014 05:05 PM                     Leo... Have you considered including any information on which theaters (at least early on) installed the DP70?  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 04-15-2014 10:22 AM                        No, but I'm not averse, especially if a sentence or two could be crafted in a way that kept it "on topic" for Wikipedia, i.e. in this case it provides evidence that the invention/development/rollout of the DP70 was of above average significance in the overall history of movie technology. Can you think of any examples of prominent theaters or chains that bought DP70s in controversial or pioneering circumstances, or whose programming or business model changed substantially as a result of installing them, etc. etc.? Will do other updates/cleanups resulting from this thread soon.  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 05-07-2014 12:13 AM                        Updates done as follows. Sorry it took me so long... 1. Sentence and reference on Kinoton providing spares updated to reflect the fact that Kinoton is now no more. 2. Correction - EL4000 now stated as a model number deriving from Philips, not AO. 3. Correction - "changing sprockets" changed to "changing pad roller assemblies." 4. Under Removable Components, added "Special fire trap rollers for nitrate were also available, to comply with fire regulations in some jurisdictions." I haven't included anything on early installer theaters, because I can't find anything easily citable from a quick Google search. Michael or anyone - feel free to add!  |  IP: Logged David Kilderry Master Film Handler Posts: 355 From: Melbourne Australia Registered: Sep 1999 posted 05-20-2014 07:50 AM                        In Australia, we always referred to them as EL 4000's. Until the internet days I had not even heard the terms DP 70 or AA11. I had four, now down to three. Looking for a good home for one them.  |  IP: Logged

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