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2. Tripod head - Wikipedia

   en.wikipedia.org/wiki/Tripod_head

   Swiss camera equipment maker Arca-Swiss Phototechnik AG independently developed a quick-release mounting system for their tripod heads. The system is based on 38 mm wide mounting plates with a 45° dovetail rail on the sides, [ 1 ] which is clamped into place on the tripod head receiver with a screw -fastened grabber plate.

3. Tribrach (instrument) - Wikipedia

   en.wikipedia.org/wiki/Tribrach_(instrument)

   The centre of the bottom plate of the tribrach has a 5/8-11 UNC thread bolt hole which is used to attach the tribrach to the tripod. The top plate has three small holes or slots spaced 120˚ apart above leveling thumbscrews, and a locking mechanism which enables a survey instrument or target to be accurately placed on the tribrach and locked in ...

4. Tripod (photography) - Wikipedia

   en.wikipedia.org/wiki/Tripod_(photography)

   Some ball heads also have a separate panoramic rotation joint on the base of the head. The head has two main parts, the ball, which attaches to the camera, and the socket, which attaches to the tripod. The camera is attached to the ball by means of quick release plate or a simple UNC 1/4"-20 [7] screw. The socket encloses the rotating ball and ...

5. Picatinny rail - Wikipedia

   en.wikipedia.org/wiki/Picatinny_rail

   The 1913 rail (MIL-STD-1913 rail) is an American rail integration system designed by Richard Swan [1] that provides a mounting platform for firearm accessories. It forms part of the NATO standard STANAG 2324 rail.

6. Tricycle landing gear - Wikipedia

   en.wikipedia.org/wiki/Tricycle_landing_gear

   A Mooney M20J with a retractable tricycle landing gear Polish 3Xtrim 3X55 Trener with a fixed tricycle landing gear taxiing.. Tricycle gear is a type of aircraft undercarriage, or landing gear, that is arranged in a tricycle fashion.

7. Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/Main_Page

   James Madison (1751–1836) was a Founding Father of the United States and its fourth president, serving from March 4, 1809, to March 4, 1817.Dubbed the "Father of the Constitution" for his role in creating the U.S. Constitution, he had been dissatisfied with the weak government under the Articles of Confederation, and helped organize the Constitutional Convention of 1787.