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The majority of 35 mm film systems, cameras, telecine equipment, optical printers, or projectors, are configured to accommodate the 4-perf system; each frame of 35 mm is 4 perforations long. 4-perf was (and remains) the traditional system, and the majority of projectors are based on 4-perf, because 4 perforations is the amount needed per frame vertically in order to have enough negative space ...
Kodachrome Commercial has a low-contrast characteristic that complements the various duplication films with which it is intended to be used: silver separation negatives for 35 mm (controlled exclusively by Technicolor) and reversal duplicating and printing stocks for 16 mm (controlled exclusively by Eastman Kodak).
Square head cap screws up to and including 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 8 inch (3.175 mm) larger than the shank; screws larger than 3 ⁄ 4 inch (19.05 mm) have a head 1 ⁄ 4 inch (6.35 mm) larger than the shank. [9] In 1919, Dyke defined them as screws that are threaded all the way to the head. [10] socket screw
For 35 mm film these are 0.1866" and 0.1870" (4.740 mm and 4.750 mm); for 16 mm film they are 0.2994" and 0.3000" (7.605 mm and 7.620 mm). This distinction arose because early nitrocellulose film base naturally shrank about 0.3% in processing due to heat, so film printing equipment was designed to account for a size difference between its ...
Figure 1 of the original patent for the molly bolt, U.S. Patent No. 2,018,251. The molly bolt was patented in 1934 by George Frederick Croessant. [3] Although his patent acknowledges that expandable fasteners of this general kind were already known, Croessant's patent is intended to provide "an improved and adequate anchoring grip that may be retightened if necessary and that will permit ...
sill - a stud sized member forming the base of a window assembly or the base of wall. mudsill - a stud sized member that forms the base of a wall and has been treated against insects and decay. top plate or double top plate - a stud sized member that forms the top of the wall. In cases where other members must bear or brace on the top of the ...
James Hardie (27 July 1851 – 20 November 1920) [2] emigrated to Australia in 1888 from Linlithgow, Scotland, and established a business importing oils and animal hides.. Andrew Reid, also from Linlithgow, came to join Hardie in Melbourne, and became a full partner in 1895
The M39 lens mount is a screw thread mounting system for attaching lenses to 35 mm cameras, primarily rangefinder (RF) Leicas. It is also the most common mount for Photographic enlarger lenses. True Leica Thread-Mount (LTM) is 39 mm in diameter and has a thread of 26 turns-per-inch or threads-per-inch (tpi) (approximately 0.977 mm pitch) of ...
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