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  2. Pouch Attachment Ladder System - Wikipedia

    en.wikipedia.org/wiki/Pouch_Attachment_Ladder_System

    The PALS grid is easily visible in this image of the US Marine Corps' Interceptor Body Armor; note the pouches attached to the system in the background (2005). The Pouch Attachment Ladder System or PALS is a grid of webbing invented and patented by United States Army Natick Soldier Research, Development and Engineering Center used to attach smaller equipment onto load-bearing platforms, such ...

  3. Permissive action link - Wikipedia

    en.wikipedia.org/wiki/Permissive_action_link

    A Russian version of analogous PAL system for their program. In the early 1970s, France was an early recipient of United States assistance on this critical element of nuclear security. The Nuclear Non-Proliferation Treaty (NPT) went into effect in 1970 and precluded treaty members (including the US) from directly disseminating technology ...

  4. M26 Modular Accessory Shotgun System - Wikipedia

    en.wikipedia.org/wiki/M26_Modular_Accessory...

    The original idea was based on the Knight's Armament Company Masterkey system, which dates back to the 1980s and originally comprised a shortened, tube-fed Remington 870 shotgun mounted under an M16 rifle or M4 carbine. The M26-MASS improved upon the original Masterkey concept with a detachable magazine option and more comfortable handling ...

  5. List of telescope parts and construction - Wikipedia

    en.wikipedia.org/wiki/List_of_telescope_parts...

    Mirrors and lenses are the critical light-bending components of a telescope. Objective: The first lens or curved mirror that collects and focuses the incoming light. ...

  6. Telescoping (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Telescoping_(mechanics)

    Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...

  7. Self-ligating bracket - Wikipedia

    en.wikipedia.org/wiki/Self-ligating_bracket

    The first patent for Self-ligating bracket was filed by Charles E. Boyd in 1933. Willam F. ford in 1951 introduced another self-ligating bracket under Johnson Twin wire technique. In 1971, A. J. Wildman introduced the Edgelok bracket which was the first type of self-ligating bracket that enjoyed commercial success. All these brackets were ...

  8. PAL-S - Wikipedia

    en.wikipedia.org/wiki/PAL-S

    In PAL system the polarity of the phase in each frame is reversed to neutralize the undesirable phase shifts introduced during transmission. Thus the effect of undesirable phase shift is positive in one frame and negative in the second frame. Averaging the two, the effect of the undesirable phase shifts in two consecutive frames cancel each other.

  9. CCIR System B - Wikipedia

    en.wikipedia.org/wiki/CCIR_System_B

    That system for the UHF bands is known as System G and all RF specifications given above (apart from the guard band width) also apply to system G. Exceptions to this would seem to be Australia, Brunei and Tanzania where the UHF channels are 7 MHz wide, and system B is used on UHF just as it is on VHF.