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In firearms and artillery, the primer (/ ˈ p r aɪ m ər /) is the chemical and/or device responsible for initiating the propellant combustion that will propel the projectiles out of the gun barrel.
The striker of the gun strikes the cap and fires the mixture. For larger guns an electric primer is used, the internal construction and action of which are precisely similar to the wireless tube already described; the exterior is screwed for the case. For percussion firing an ordinary percussion tube is placed in an adapter screwed into the case.
In modern firearm designs, a firing pin and primer are used to ignite the propellant in the cartridge which propels the bullet forward. The firing pin must travel a short distance, creating a short delay between the user pulling the trigger and the weapon firing, which generally decreases accuracy.
The GT200 is a fraudulent "remote substance detector" that was claimed by its manufacturer, UK-based Global Technical Ltd, to be able to detect, from a distance, various substances including explosives and drugs.
By 1940, the 6V6G production was largely superseded by this smaller "GT" T-9 glass envelope. [8] On April 17, 1942, the War Production Board ordered radio tube manufacturers to discontinue within seven days the production for civilian use of 349 of the 710 types of radio tubes on the market, amongst these were the 6V6G and 6V6GX.
The Echo Connect is a small adapter that plugs into any Echo and a home phone line, allowing the Echo to make voice calls through a home phone number. [ 96 ] In September 2018, Amazon announced the Echo Sub , a subwoofer that connects to other Echo speakers, and the Echo Wall Clock , which can display how much time is remaining on timers set ...
Service deployment commenced in quantity in 1963. First manufactured by GT Price, the MX99/U is a further development of the 1944 TL-122(D). [3] The new flashlight used a plastic housing incorporating a second lens ring with an extended base containing lens filters in blue, red, and clear, plus a spare bulb. [4]
Fuel primer pump - A manual pump to add a small amount of fuel at the cylinder intakes to assist in starting a cold engine. Fuel-injected engines do not have this control. For fuel-injected engines, a fuel boost pump is used to prime the engine prior to star