: below our
ve demon-
ccuracy of
money and
nt of the
rocks had
revolution-
public or
zations in
as hard to
that maps
: produced
a limited
this time,
, anything
cetchy and
with great
s suffered
their time
have since
icceptance
and after
| mapping,
X business
| by Aero
1 the great
n fulfilled
ce of the
the early
kept very
s, starting
t Weldon
ing more
' them the
n Tennes-
e Plant in
| the vast
rk (4,800
ing), and
location
ient.
, founded
lirections.
world, it
ay survey
| 1932, all
as photo-
d marked
| mapped.
se 9 inch
ision film
made in
developed
inch and
5.2 inch metrogon wide-angle Bausch and
Lomb lenses. In 1939 when Dr. Lovelace
was perfecting oxygen masks and control
equipment for pilots, AERO cooperated in
early experiments. The Breakaway System
of mosaic compilation was invented by
Joseph Masino and Ed Schuch of AERO
in 1943, and indeed most of the develop-
ments in the assembly of precise mosaics
were carried forward by Fairchild Aerial
Surveys and this Company. Another
AERO development was the ratiograph
for tilt computation.
In the field of photo-chemistry, Dr.
Walther Barth of AERO developed a fine
grain emulsion for diapositive plates. . . .
Its field surveymen use the AERO Trig-
Transverse Method, a modification of the
subtense principle, which yields third-
order horizontal control at a substantial
saving over ordinary traverse or triangu-
lation. AERO'S field survey staff pioneered
also in the use of shortwave radio “trans-
ceivers" for communications between
crews, and in the use of helicopters to
establish vertical positions. ... From
AERO has come significant improvements
in the Kelsh plotters, and the Company
was the first to use the new Wild A-7
Autograph. The Company's Sketchmasters
and other photogrammetric instruments
are well known. The company sought new
uses for photogrammetry. Typical is
AERO'’S application of topographic map-
ping to the inventorying of large stock-
piles of ore or coal; similarly, the Company
has been doing exploratory work with
color photography for photo-geologic uses.
In another new field for the photogram-
metrist, AERO has brought forward im-
portant new developments in the produc-
tion of relief maps in lightweight Vinyl
plastic, as well as in Thiokol and other
special materials, for military training uses.
The Company also contributed an air-
plane and technical personnel to the
Government's early tests of the new geo-
physical exploration tool, the airborne
magnetometer. In its work with this instru-
ment the Company has developed special
flight control patterns for both Shoran and
visual reference flying, set up a system
for monitoring for magnetic storms, and
invented special profile transcribers for
data compilation. .. . The Company has
also carried forward the application of the
wartime plane-positioning aid, Shoran, in
PHOTOGRAMMETRIC ENGINEERING 37
magnetic surveys, high altitude mapping,
and special testing or tracking programs.
Finally, AERO and its associates are at
work on a broader application of the air-
borne scintillation counter for uranium
exploration and the narrow-beam radar
altimeter for reconnaissance mapping.
Today Aero Service Corporation and its
affiliate companies—Canadian Aero Serv-
ice, Ltd., and International Aero Service
Corporation—have completed photo-
graphic or magnetometer surveys all over
the United States and Canada and in no
less than 24 other countries.
Brock PATENTS ISSUED By UNITED STATES
Number Covering
1,221,902 Camera Mountings, 4-10-17
1,224,545 Means for Determining Ground
Speed, 5-1-17
1,300,114 Film—Cameras, 4-8-19
1,301,873 Spring—Motor Controls, 4-29-19
1,301,968 Spring—Motor Controls, 4-29-19
1,304,017 Angle Fixing and Transposing De-
vices, 5-20-19
1,311,416 Automatic Plate—Cameras, 7-29-
19
1,311,447 Camera Mechanism, 7-29-19
1,315,307 Film—Supports for Cameras, 9-9-
19
1,331,978 Methods of and Apparatus
for Photographic Cartography,
2-24-20
1,485,929 Lenses, 3-4-24
1,558,272 Aeroplane Cameras, 10-20-25
1,565,413 Methodsof Making Maps, 12-15-25
1,612,800 Methods for the Conversion of
Conical Projections to Ortho-
graphic Projections, 1-4-27
1,633,253 Projection Tracing Tables, 6-21-27
1,649,406 Resultant—Tilt Finders, 11-15-27
1,756,062 Measuring Stereoscopes, 4-29-30
1,910,425 Methods of Making Maps, 5-23-33
1,911,142 Apparatus for Correcting Tilted
Photographs, 5-23-33
REFERENCES
Brock, Arthur, Jr., “Military Airplane Pho-
tography,” Aviat. Aer. Eng., Vol. 2, No.
8, May 15, 1917.
— ——, "Topographic Surveying by Aerial
Photo,” Aviation, Vol. 6, No. 2, Feb. 15,
1919.
Brock, Arthur, and Holst, L. R. J., “Aeroplane
Photography," II. Aviation, Vol. 5, pp. 705-
707, Jan. 1919.
Brock, Arthur, and Holst, L. R. J., “The Brock
Automatic Airplane Camera,” Philadelphia.
