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A 1948 advertisement for a Weller soldering gun. Pistol-grip electrically-heated soldering tools had been used since the 1920s. In 1941 Carl E. Weller invented and later obtained U.S. patent 2,405,866 [1] for a transformer-based soldering tool which heated and cooled rapidly, [2] essentially as described in this article.
In these devices, piezoelectric crystals are used to generate high frequency (20—60 kHz) acoustic waves in molten solder layers or batch, to mechanically disrupt oxides that form on the molten solder surfaces. The tips for ultrasonic soldering irons are also coupled to a heating element while the piezoelectric crystal is thermally isolated ...
desoldering gun; hot air gun; infrared heater. Soldering iron is the most common working tool of a soldering station. Some stations may use simultaneously several soldering irons to make the process quicker and more convenient, as there is no need to change the soldering tips or readjust the station or the soldering temperature.
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Electric soldering iron for electronic work. In 1946, Carl E. Weller applied for a patent for his soldering gun that could heat instantaneously and began production of the "Speedy Iron" in Pennsylvania. [12] It was manufactured through the Weller Manufacturing Company, and this product was the first instantaneous thermal soldering gun.
Reballing involves dismantling, heating the chip until it can be removed from the board, typically with a hot-air gun and vacuum pickup tool, removing the device, removing solder remaining on the device and board, putting new solder balls in place, replacing the original device if there was a poor connection, or using a new one, and heating the ...
U.S. President Joe Biden said he remained undecided on whether to issue pre-emptive pardons to protect some public figures who have been threatened with retaliation by his Republican successor ...
The top fundraising campaign on crowdfunding platform GoFundMe in 2024 reflects what has been a major pain point for millions of Americans: inflation. The company's annual giving report shows that ...