[ARC5] System ID for 1939 patent

[Bart Lee]

     Scott Robinson of CHRS suggested I might be interested in this. Yes,
indeed, having once had custody of an MN-26 system (partial). Mike's
information certainly makes the case that Kruesi's patent underlies the
later SCR-186. But having read the patent, it seems to me it also underlies
the somewhat different approach in the Bendix MN-26 (SCR-242).  Kruesi
worked for Bendix, after he worked for Federal (and Kolster?). Bendix seems
to have been working on what became the MN-26 in the mid-1930s.
     See the 1941 brochure:
https://aafradio.org/docs/Bendix_1941_brochure.pdf .
     See also the SCR-242 1937 manual:
https://www.radionerds.com/images/c/cd/Scr-242-a_radio_compass.pdf .
     There's much warp and woof to any weaving.

73 de Bart, K6VK##
-- --
Bart Lee, K6VK, CHRS - Archivist, AWA, ARRL

Texts only to: 415 902 7168

www.bartlee.com

{Bart(dot)Lee(dot)K6VK(at)gmail(dot)com}
<http://www.lawforhams.com/>



On Wed, Jul 1, 2020 at 4:21 PM Michael Hanz <aaf-radio-1 at aafradio.org>
wrote:

> It was a later development of the E4 and SCR-186-T5 radio compasses,
> Brooke.   I'm not sure it ever got an official nomenclature, since there
> were competing systems being touted at the time in a battle between the Air
> Corps and the Signal Corps, apparently won by the less than satisfactory
> SCR-242 in a faceoff between the Generals.  See the bottom half of the web
> page at https://aafradio.org/flightdeck/1935/SCR-AE-183.html for more on
> the story.
>
> 73,
> Mike  KC4TOS
>
> On 7/1/2020 4:19 PM, Brooke Clarke via ARC5 wrote:
>
> Hi
>
> Is there a system name for this RDF?
>
> This patent shows a Radio Direction Finder installed in what appears to be
> a two seat biplane.  The patent application was in 1933 and it was granted
> in 1939.
> The patent seems to cover all the parts of the system, not just one
> aspect.  There is no company assigned.
> The inventor, Geoffery G. Kruesi, has other similar patents some for
> Bendix and Federal Signal.
> Page one of the patent is here:
> https://prc68.com/I/RDF.shtml#2142133
> and clicking the image gives a larger image.  I'll try and attach the
> image below:
> [image: 2142133 Radio direction finder, Geoffrey G Kruesi, 1939-01-03]
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: https://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20200701/df8db836/attachment.html>