We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
36
Motion Picture News
October 11, 1930
Engineers' New Dimensional Standards Ready for Industry's Immediate Use
intermittent and feed sprockets are given in Chart 7. Dimensions of Motion Picture Projection Aperture.
a. Standard 35 mm. film
Width 0.9060 inch (23.01 mm.). Height 0.6795 inch (17.26 mm.).
b. Safety standard 28 mm. film
Width 0.748 inch (19.00 mm.). Height 0.551 inch (14.00 mm.).
NEGATIVE &. POSITIVE SPLICES
Negative Splice
.<T
3$
vffc
1 Picture Frame Line I
I®
-®
\
Full Hole Positive Splice
n
-0
Picture frame Line —
IS
7. External Diameter of Projection Lenses.
a. No. 1 projection lens
External diameter of lens barrel 2 1-32 inches (51.59 mm.).
TAKE-UP (HOLDBACK) SPROCKET 16 Teeth rv^1-— ^i 35 7. Fil n
B
— 3321 Base Di a— t)
(S5.6/5*)
■ 1.032
(46^ I "X.)
mSL
(.05%)
-//0/ Toow Gauge {eB.ityl
UbD — „
INTERMITTENT AND FEED SPROCKETS
16 Teeth <v-— a-— ^i 35 "X, Film
-3452 Base Dia
Round Corners 1)75' Rao. hn%)\ F APPROX .OWRad (!.S/%) ^i. 'l I *
t / 107' Tooth Gauge !
_I
fc. A^o. 2 projection Lens
External diameter of lens barrel 2 25-32 inches (70.65 mm.).
8. 16 mm. Feed Sprockets.
The dimensional standards relating to this element are shown in Chart 8. It should be noted that dimensions are given relating to sprockets having 5, 6, 7 and 8 teeth, and also dimensions relating to these sprockets when designed for 2, 3 and 4 teeth in contact with the film.
9. 16 mm. Take-Up (Hold-Back)
Sprockets.
The dimensions are shown in Chart 9.
10. 16 mm. Combination (Feed and
Take-Up) Sprockets.
The dimensions are shown in Chart 10.
11. 16 mm. Camera and Projector Aper
tures.
The dimensions are shown in Chart 11.
12. 16 mm. Splices.
The dimensions are shown in Chart 12.
13. Width of Film Track in 16 mm. Cam
eras and Projectors.
A clearance of 0.005 inch (0.13 mm.) shall be allowed in the construction of the film track in cameras and projectors using 16 mm. film. The standard cutting width (see Chart 4) is 16.0 mm. (0.62992 inch). This dimension is the upper limit and gives
Width of film track = 16.13 mm. (0.63492 inch).
14. Taking Speed, Standard 35 mm.
Sound Pictures.
This shall be 24 pictures per second.
15. Projection Speed, Standard 35 mm.
Sound Pictures.
This shall be 24 pictures per second. 16. Scanning Line.
a. Position relative to picture aperture The scanning line (for combined sound and picture on 35 mm. film) ( shall be located at an average distance of 14.5 inches measured along
16"/„ FILM STANDARDIZED SPROCKET SIZES
Feed Sprockets
^.050 R
17.
the film below the center of the picture gate. b. Transverse position relative to the guided edge of positive film
The position and dimensions of the scanning line shall be as shown in Chart 13. Sound Track.
The location and width of the (.Continued on next page)
16M/„ FILM STANDARDIZED SPROCKET SIZES
Tamc up (holdBa chJ Sprockets iC^OSOR
id
NaSfKoarTan. /Hovsto*s9*toutt l*cnfsfivas&mtAtrlro«cslKfl[SSn#Me
NtMBEPOrTEETH IhCohtactWith Film
1,643 038 ISO"/,
55S4
6524
7464
4643
037\ 0 038/ SOX
037 0 033 I50Y.
037 0 038 1 SOX
5584
I "
031 O SOX
6514'
'mi
5584)
032/SOX
03l\ O 032/SOX
w
74&4'
030 0 031 1 SOX
0
03l'/S0X
030, O 031/ SOX
E
Rouw Copneps Appro*. 005'f/AD
048—
r^