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Signal Corps binocs
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Author:  Correspondent [ Wed Jun 12, 2019 13:35 pm ]
Post subject:  Signal Corps binocs

Anyone know how to dismantle a pair of Bausch and Lombe, US Army Signal Corps binoculars. Got a rather nice set only there is a large amount of fluff or fungus in the left hand side, tried to dismantle to clean it all but cant get to where I can access the actual front of the lens or prism on the interior to get the crud off ... anyone had experience of taking them apart please ..??

Author:  LookDuckandVanish [ Wed Jun 12, 2019 19:33 pm ]
Post subject:  Re: Signal Corps binocs

Guessing that you have search for information on dismantling your binoculars and had no success, have you seen the general ones which may give you some guidance?


https://www.scribd.com/doc/11912773/Bin ... sassembly1

https://www.google.com/search?sa=X&q=ho ... FIImvYa0tM

https://youtu.be/b2Og9q5tko0

There are other sites.

Have you thought of having them professionally cleaned, especially if you want them nitrogen purged?

https://www.bestbinocularsreviews.com/b ... ervice.php

Author:  Correspondent [ Wed Jun 12, 2019 21:24 pm ]
Post subject:  Re: Signal Corps binocs

Yes as you guessed I have done a specific search but with no luck, I thought about a general one but as the links you sent proved it wasn't much help, thanks anyway .. They are a pretty basic pair of binocs, only 6x power, lenses and prism. I can get the front lens elements off and get access to the prism and that glass, but the fluff etc is beyond that, and its the back viewing lens elements I cant get access to.

Not thought of a pro clean, but as a photographer have stripped and cleaned camera lens so am pretty confident I can clean these ... if I can get the viewing lens off the main body ..!!

Author:  LookDuckandVanish [ Wed Jun 12, 2019 21:45 pm ]
Post subject:  Re: Signal Corps binocs

The post by BillC 29th Aug 2010 maybe of help to you:-

https://www.cloudynights.com/topic/2864 ... inoculars/

Author:  earlymb [ Thu Jun 13, 2019 9:16 am ]
Post subject:  Re: Signal Corps binocs

I think the original military manual might be available as .pdf somewhere? Opening the cylinders however will let normal air in that might cause condensation later?

Author:  LookDuckandVanish [ Thu Jun 13, 2019 9:45 am ]
Post subject:  Re: Signal Corps binocs

earlymb wrote:
Opening the cylinders however will let normal air in that might cause condensation later?

This why a nitrogen purge or even just dry air is used and as long as the binoculars have good seals, condensation won't be a problem.

earlymb wrote:
I think the original military manual might be available?

Correspondent, what model are the binoculars?

Author:  Correspondent [ Thu Jun 13, 2019 12:05 pm ]
Post subject:  Re: Signal Corps binocs

Hi guys, firstly thanks for the input ... a bit like the old days ...

OK .. they are as I say a pair of Signal Corps binocs. and marked as such, please see pics ... the case is original too and match the binocs I think, there is a mark under the front lip of the case that says 'Nash-Kelvinator', on top of the case it says 'Case carrying M17' and there is a (serial ?) No on the front 'D44160' the pictures tell the story otherwise, you can clearly see the muck in the left hand side.

I have researched binoc repairs, there are places that will do wartime spec ones, the thing being it is an easy clean, no repair as such needed and something I can do myself ( I take the point of the nitro purge tho' ) .. if as I say I can get that rear lens element off ... if there is a PDF wartime manual around would love to see it but not been able to find it myself .. !!

Author:  LookDuckandVanish [ Thu Jun 13, 2019 13:55 pm ]
Post subject:  Re: Signal Corps binocs

A long shot but you could contact Bushnell to see if they have a Bausch and Lomb archive:-

https://www.bushnell.com/

Another thought, ask the question on a binocular forum, e.g. :-

http://www.opticstalk.com/binoculars_forum9.html

Author:  Correspondent [ Thu Jun 13, 2019 15:32 pm ]
Post subject:  Re: Signal Corps binocs

The problem with forums is you have to sign up ... not really practical for one enquiry to my mind especially if your not into the subject in any big way .. !!

I did find this ... http://home.europa.com/~telscope/milusarm.txt .....

Type EE. Issued by 1916, Porro prism, magnification 6, 1.1875 inch
objective, mil scale reticle on one side.



The Signal Corps Storage Catalogue (1920):
Type E - "binocular, 6 by 30; same as Field glass, type EE, except for
omission of the mil and range scale"
Type E-1 - "binocular; Galilean: 4.5 inches diameter magnification;
object lens 1.75 inches...formally designated type B"
Type E-9 - "Galilean; magnification approx. 3.5 and 5.5 diameters; object
lens 1.5 inches...formally designated type A '1910' "
Type E-10 - "prismatic; 'Terlux' 10-power; object lens, 1.75
inches...formally designated type C"
Type E-11 - "prismatic; Busch 8-power 'Stellux'; object lens, .75-
inch...formally designated type D"
Type EE - "binocular, 6 by 30; object lens, 1.1875-inch...one barrel
equipped with mil and range scale"


From that I take mine to be around 1920 ish ... not a lot about stripping and cleaning though .. ??

Author:  earlymb [ Fri Jun 14, 2019 8:57 am ]
Post subject:  Re: Signal Corps binocs

US WW1 bincos cases had a compass on top of the lid, if this is missing it might be a WW2 M17 case used for the M3 binocs which are identical in size. My WW1 bincos (made by talbot Reel and from the serial# I could date them to 1917) are also marked 'Signal Corps' and I think they were ordered by them for further distribution to other branches.

Author:  Correspondent [ Fri Jun 14, 2019 16:56 pm ]
Post subject:  Re: Signal Corps binocs

Mine don't have the compass on the case ... and are in fact marked M17 as I say, pic attached ... strangley though in my previous post the quote from the link says there should be a reticule on one side .., but there isn't in mine .. ??

Author:  Correspondent [ Fri Jun 14, 2019 17:03 pm ]
Post subject:  Re: Signal Corps binocs

Have to confess to being a little bit confused ... quoting from the link above ...

Type EE. Issued by 1916, Porro prism, magnification 6, 1.1875 inch
objective, mil scale reticle on one side.


The Signal Corps Storage Catalogue (1920):
Type E - "binocular, 6 by 30; same as Field glass, type EE, except for
omission of the mil and range scal
e"


Type EE - "binocular, 6 by 30; object lens, 1.1875-inch...one barrel
equipped with mil and range scale"


Mine are definitely marked EE and are 6 x 30 as can be seen in the pics, but in not having the reticule mil range scale at all, according to the above shoudl be a type E .. ??/

Author:  LookDuckandVanish [ Fri Jun 14, 2019 17:44 pm ]
Post subject:  Re: Signal Corps binocs

Have you tried removing the prism cover c/w the lens? By the look of the screws they have been unscrewed a number of times.

Author:  Correspondent [ Fri Jun 14, 2019 18:16 pm ]
Post subject:  Re: Signal Corps binocs

Yes it does look like they have been 'investigated' in the past ... I have had the left viewing (front) lens off, and also removed the cover and had access to the prism, but the crud is below all that, I need to get in from the back lens end, and that's where I'm coming unstuck, I cant get into the mechanism or access the bottom/back lens elements there .. !!

Author:  LookDuckandVanish [ Sat Jun 22, 2019 18:55 pm ]
Post subject:  Re: Signal Corps binocs

Any progress to report?

Author:  Correspondent [ Sun Jun 23, 2019 10:02 am ]
Post subject:  Re: Signal Corps binocs

No not so far .. to be honest I left it for a bit as I have mailed a supposed repair place who advertise that they handle older binocs, your message reminded me as I have had no reply .. ??
Will have a look at them again soon.

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