Position Angle Finder


© Brooke Clarke 2017

Background
Description
Photos
Related
References
Links

Background

Related to optics and probably navigation.

Description

Wooden case holds the Position Angle Finder, 4 each "D" cell batteries and maybe dampening fluid.


Fig 6 below comes from a Wiki page that only has this photo of a Mk 1 Mod 0.  My unit is a Mk 1 Mod 1 unit.
Differences Table

Mk 1 Mod 0 Mk 1 Mod 1
zero to 3 filters on unit & pockets in case for filters
no filters or unit & no pockets for them in case
exposed wire leading to lamp
wire covered
Dampling FLuid Bottle labeled: "Moisture Proof D????
?? Fresh -- Always Rep???
no internal damping fluid or bottle
but needs it
Spare bulbs in lid compartment
Spare bulbs in bottom of case (Fig 2)
Case Marked Position Angle Finder Mk1 Mod 1
Case Marked Position Angle Finder Mk1 Mod 1
Unit Marked Position Angle Finder Mk1 Mod
Unit Marked Position Angle Finder Mk1 Mod1


Photos


Fig 1 Case exterior view.
Position Angle Finder
Fig 2 Mk 1 Mod 1 in case
Position Angle Finder
Fig 3 Case holds 2 ea "D" cells.  Push and hold for on, no slide action on switch.
Position Angle Finder
Fig 4 View through eyepiece is straaight out this opening.
Round chamber contains angle measuring pendulum.
Position Angle Finder
Fig 5 Telescope, M6, No. 18240, E.K. C0.  1943   F.J.A.
Position Angle Finder

TM 9-1578 Ordnance Manual
Telescope M6
and Telescope Mount M19
October 2, 1941 (for use with 37mm gun)

The manual also explains the meaning of the reticle.

Was the M6 used in conjunction with the Postion Angle Finder, or what it just stored in the same case? . . .
If you have any documentation  . .
Let me know.
Fig 6 Mk 1 Mod 0 photo
From:  File:Position Angle Finder, United States Navy, Mark 1, Mod 1, 1942, by Polaroid Corp., view 1 - MIT Museum - DSC03779.JPG
Position Angle Finder
Fig 7 View through eyepiece w/flashlight in lamp hole
Position Angle Finder
Telescope M6 TM 9-1578 Fig 2
TM 9-1578 Fig 2
                      M6 Telescope



Related

 

References


Links

PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale
Page Created 23 July 2017