 |
   |
|
|
|
|
|
|
|
|
 |
 |
|
|
|
|
|
Feb 20, 1917 |
Preparation of films from cellulose ethers
L. Lilienfeld describes the preparation of films from
cellulose ethyl
ether or other cellulose ethers by dissolving in alcohol or
benzene,
filtering, and then pouring or spreading the solution. The
process
may also be used to produce an artificial silk.
add a comment |
|
|
|
|
|
|
May 24, 1917 |
Patent for aluminum-zinc-magnesium alloys
W. Guertler and W. Sander receive a patent disclosing the
high
strength obtainable by the heat treatment of wrought
aluminum-zinc-
magnesium alloys.
add a comment |
|
|
|
|
|
|
Jul 10, 1917 |
Aircraft construction fabric
H. Dreyfus develops a transparent fabric for use in the
construction
of aircraft, etc., comprising cellulose acetate reinforced
with a
metallic fabric of some kind, preferably a mesh.
add a comment |
|
|
|
|
|
|
Jul 16, 1917 |
Dope for fabrics for balloons and aircraft purposes
A. Flatters' dope for fabrics for balloons and other
aircraft purposes
is made of the following: casein, borax, soap, glycerol and
water.
When dry, a coating composed of a solution of commercial
anime gun is
applied as a fireproof finish.
add a comment |
|
|
|
|
|
|
Aug 01, 1917 |
Patent for a new material
A composition consisiting of cork fragments and a solution
of casein
in water with borax, lime silicate or waterglass, castor
oil, and
tannic acid is patented by N.A.T.N. Feary.
add a comment |
|
|
|
|
|
|
Aug 28, 1917 |
New airplane varnish
S.E. Graves and T.W.H. Ward devise a varnish for airplanes
consisiting
of a solution of cellulose ester and acetone.
add a comment |
|
|
|
|
|
|
Nov 27, 1917 |
New material to join woodwork
Hydrolyzed starch mixed with alum and sodium hydroxide to
form sodium
aluminate in the starch is used to join woodwork or
veneering,
according to a patent issued to R.W. Tunnell.
add a comment |
|
|
|
|
|
|
Feb 05, 1918 |
Patent for adding oleic acid to mineral oils
J.E. Southcombe and H.M. Wells receive a patent for the
addition of
oleic acid to mineral oils.
add a comment |
|
|
|
|
|
|
1919 |
Heat-treatment by duralumin age-hardening
P.D.Merica, R.G. Waltenberg, and H. Scott, National Bureau
of
Standards, explain the heat-treatment phenomena exhibited
by duralumin
age-hardening caused by the formation of sub-microscopic
particles of
an inter-metallic compound from the supersaturated solid
solution.
add a comment |
|
|
|
|
|
|
Apr 08, 1919 |
Resins added to paper/cloth
J.R. McLain impregnates thin cloth or paper with phenol-
formaldehyde
resins, using pressure to consolidate.
add a comment |
|
|
|
|
|
|
May 15, 1919 |
Airplane non-conducting flexible fabric developed
N.A.T.N. Feary develops an airplane non-conducting flexible
fabric
provided with an electrically depositied metallic coating
for
fireproofing and strengthening. The fabric is saturated in
boiling
linseed oil under pressure, dried, coated with plumbago,
and passed in
contact with conductors through a copper sulphate solution.
add a comment |
|
|
|
|
|
|
Jul 16, 1919 |
Report on specific gravity vs. strength of wood
J.A. Newton and T.R.C. Wilson report the findings of the
Forest
Products Laboratory on the nature of the relations between
the
specific gravity or density of a wood and its strength
properties.
add a comment |
|
|
|
|
|
|
Dec 01, 1919 |
Alpha iron is body-centered cubic
A.W. Hull shows the lattice of alpha iron to be body-
centered cubic.
add a comment |
|
|
|
|
|
|
1920 |
X-ray spectroscopic investigations of cellulose
R.O. Herzog and W. Jancke conduct X-ray spectroscopic
investigations
of cellulose.
add a comment |
|
|
|
|
|
|
Jun 01, 1920 |
Oleic acid can lower coefficient of friction
Irving Langmuir demonstrates that a monolayer of oleic acid
is
sufficient to lower the coefficient of friction of rubbing
solids to
only 0.1.
add a comment |
|
|
|
|
|
|
Jul 01, 1920 |
High purity zirconium powder produced
J.W. Marden and M.N. Rich, Bureau of Mines, produce a
zirconium powder
of high purity by reducing potassium fluozirconate with
aluminum and
then distilling out (in vacuo) the resulting low-aluminum
alloy.
add a comment |
|
|
|
|
|
|
Aug 01, 1920 |
Austenitic chromium-nickel steels
B. Strauss and E. Maurer, Krupp, announce the commercial
possibilities
of austenitic chromium-nickel steels.
add a comment |
|
|
|
|
|
|
Oct 28, 1920 |
New varnish for airplane fabrics
D.M. Sutherland forms a varnish for airplanes fabrics of 6-
12 parts
acetylcellulose, 36-44 parts acetone, 24 parts benzene, 24-
25 parts
"borated benzen," and 2-3 parts benzyl alcohol.
add a comment |
|
|
|
|
|
|
1921 |
Y-alloy of aluminum investigated
W. Rosenhain, S.L. Archbutt, and D. Hanson investigate the
Y-alloy of
aluminum, which contains 4% copper, 2% nickel, 1.5%
magnesium.
add a comment |
|
|
|
|
|
|
1921 |
Ductility of molybdenum shown temperature-sensitive
W.P. Sykes demonstrates that the ductility of molybdenum is
very
temperature-sensitive, an abrupt transition from ductile to
brittle
taking place near room temperature, depending markedly on
the thermal
and mechanical history of the sample.
add a comment |
|
|
|
|
|
|
|
|
