A-10A Aircraft Sextant
© Brooke Clarke 2017
Background
Description
Photos
Patents
Related
References
Links
Background
Description
Photos
Patents
Related
References
Links
Background
Got this because of my interest in Navigation.
Description
This is one of the averaging aircraft (uses bubble instead of horizon as reference) sextants.
Photos
Fig 1
Fig 2
Fig 3
Fig 4
Fig 5
Patents
Fairchild
page 1 of 5 drawings
2456392 Sextant marking device, Irving W Doyle, Fairchild Camera & Instrument App: 1945-01-31, W.W II, Pub: 1948-12-14, -
Doyle has a couple of dozen patents on aerial cameras.
General Time
Fig 1 A-10 version
Fig 4
2516187 Calculating instrument, Deimel Richard Francis, Black William Alexander, General Time Corp, 1950-07-25, - This is the key patent for the S5807 Periscopic Sextant Averager.
It probably was used on a number of different aircraft sextants?
Thomas L Thurlow
2173142 Optical system for sextants and the like, Burka Samuel M, Thurlow Thomas L, Sep 19, 1939, 356/249, 33/348.2, 33/348 -
2266741 Panoramic sextant, Burka Samuel M, Crane Carl J, Thurlow Thomas L, Dec 23, 1941, 356/147, 359/401 -
2304129 Multiple bubble sextant or other altitude measuring device, Thomas L Thurlow, Dec 8, 1942, 33/268, 33/351, 33/381, 33/282, D10/66 -
2384507 Observation instrument, Thurlow Thomas L, Sep 11, 1945, 356/148, 74/810.1 -
2395921 Horizontal reference means for sextants and the like, T. L. Thurlow, Alma Lois Thurlow, Mar 5, 1946, 356/249 -
Bausch & Lomb
A-8
1674550 Liquid Level, Franklin L Hunt, Karl H Beij, Bausch and Lomb Inc, 1928-06-19, 33/380; 33/390 - bubble for aircraft use
1703705 Means for determining altitude, Karl H Beij, Bausch and Lomb Inc, 1929-02-26, 356/148; 362/23.01 -
2306874 Liquid level, Edward F Flint, Bausch and Lomb Inc, 1942-12-29, 33/380; 33/390 -
General
1885428 Liquid level, George B Gallasch, Bausch and Lomb Inc, 1932-11-01, 33/390 - temp compensated bubble for use in aircraft sextants
2080851 Sextant, George B Gallasch, Henry F Kurtz, Bausch and Lomb Inc, 1937-05-18, 33/348; 33/268 - aircraft patent is about night lighting, A-8?
2140579 Averaging device, Harold E Gray, 1938-12-20, - wheel on turntable integrator (like ball-and-disk)
2257233 Recording instrument, George B Gallasch, Bausch and Lomb Inc, 1941-09-30, 346/2; 346/124 - aircraft Sextant A-8?
2306874 Liquid level, Edward F Flint, Bausch and Lomb Inc, 1942-12-29, 33/380; 33/390 -
2344241 Illuminated bubble level, Edward F Flint, Bausch and Lomb Inc, 1944-03-14, 33/348.2; 362/84; 362/576; 33/348; 33/390 -
2366016 Optical instrument, Edward F Flint, Bausch and Lomb Inc, 1944-12-26, 356/143; 356/147 - aircraft sextant
2385978 Optical instrument, Edward F Flint, Bausch and Lomb Inc, 1945-10-02, 356/148 - aircraft sextant
2406211 Bubble cell, Edward F Flint, Bausch and Lomb Inc,1946-08-20, 33/380; 33/390 - aircraft sextant
Henry Hughes & Son Mk IX Bubble Sextant
GB480112 Improvements in calculating mechanism for measuring instruments, Henry Hughes & Son, 1938-02-17, -
GB490621 Improvements in or relating to sextants and similar instruments for angular measurement, 1938-08-18,
2145347 Calculating mechanism for measuring instruments, Everitt Philip Francis, Henry Hughes & Son, 1939-01-31, -
2232518 Illuminating means for optical instruments for measuring angles, Everitt Philip Francis, Henry Hughes & Son, 1941-02-18, -
2252341 Sextant and similar instruments for angular measurement, Everitt Philip Francis, Henry Hughes & Son, 1941-08-12, -
2272604 Collimating lens and optical system, Everitt Philip Francis, Henry Hughes & Son, 1942-02-10, -
2285856 Means for evaluating and indicating the average value of successive time observations, Everitt Philip Francis, Henry Hughes & Son, App: 1938-08-03, W.W. II, Pub: 1942-06-09, - average indicating
2578234 Sextant hatch, Everitt Philip Francis, Jamieson George Robert, Henry Hughes & Son,1951-12-11, -
Marine Distance Meter Pattern 703 H.H. & S.
2428416 Apparatus for the solution of triangles, Everitt Philip Francis, Henry Hughes & Son,App: 1943-08-13, W.W.II, Pub: 1947-10-07, -
Periscopic Aircraft Sextant, Kelvin Hughes Ltd
2665484 Sextant and other angle measuring instruments, Everitt Philip Francis, Keeble John, Kelvin Hughes Ltd, 1954-01-12, -
Other
1337912 Sextant, Alexander Hughes Henry, Yeomans Baker Thomas, Apr 20, 1920, 356/146 -
1556994 Aiming device with optical reflecting system for moving stations, Jacob Heinrich, Optische, 1925-10-13, - includes bubble level
1651014 Sextant, Cogshall Wilbur A, Nov 29, 1927, 356/149, 356/250, 33/268 -
2220884 Sextant, Burka Samuel M, Crane Carl J, Nov 12, 1940, 356/149 -
2238032 Direct reading sextant, Burka Samuel M, Crane Carl J, Apr 15, 1941, 356/143 -
2276284 Drift meter, Samuel M Burka, Carl J Crane, Mar 17, 1942, 356/150, 33/232 -
2313734 Temperature compensated bubble for panoramic sextants, Samuel M Burka, Carl J Crane, Mar 16, 1943, 33/315, 33/379, 219/201, 33/348 -
2418264 Driftmeter, Joseph R James, Keyzer-Andre Rene, John E Norman, Apr 1, 1947, 356/150, 359/668 -
2505819 Panoramic sextant having stabilized reticle, Walter Wrigley, Sperry Corp, May 2, 1950, 356/149, 359/428, 359/429, 359/401, 359/737, 359/725, 359/557 -
2579903 Periscopic sextant, Carbonara Victor E, Kollsman Instr Corp, Dec 25, 1951, 356/149, 356/140, 359/402 -
Related
Aircraft - Link Sextant & Celestial Navigation trainers
Navigation
Mk II Astro Compass
MD-1 Automatic Astro Compass
MIL-S-5807A Sextant, Aircraft, Periscopic, Kollsman Instrument Corporation, MS part no. MS 28011-1
References
Ref 1. YouTube: WWII Aircraft Bubble Sextants Link A-12 & Fairchild A-10A, 6:49 -
2:18 Link A-12 bubble sextant -
5:02 Fairchild A-10A bubble sextant - NOT periscopic.
Links
PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale
Page Created Sep 22, 2017