Editing Mercury switch (section)

===Electrification of church bells===
{{cleanup|section|reason=This section does not cite any sources  ([[WP:OR]]?), and may place undue weight on the topic of church bells. 
|date=June 2024}}
In the 1950s, Austrian bellfounder from [[Vienna]], Josef Pfundner jr., decided to develop a new method of electrifying church bells. Austria’s existing electric church bells were already motorized using motors from a German factory in [[Herford]], combined with brakes and gearbox in order to change the direction of the motor, while maintaining an optimal swing angle and changing the swing direction of the bell. This method was expensive, thus, Pfundner decided to use a motor with a brake and ''mercury switch'' instead. This was cheaper, albeit significantly more sensitive. This type of "gearbox" on the yoke contained four mercury switches, specifically, two switches for each direction, which were wired to the motor in such a way as to change swinging direction while the bell was ringing. The bell’s swing angle could be adjusted by carefully moving the switches, though, in an instance where a switch may be incorrectly installed on the yoke, or broken, the bell risked being fatally cracked/damaged.{{Citation needed|date=March 2025}}

Pfundner closed the bellfoundry in 1971. The bellfoundry Grassmayr from Innsbruck in Tyrol had bought a licence for using Pfundner‘s patented method, and they continued to use it for their own bell electrification until the early 2000s. Some church bell electrifiers in [[Croatia]] also adopted this same system (e.g. Alojz Domislovic his successor Luka Ivandija, and later Ivan Bosilj. Ivan Bosilj stopped with usage of mercury switches in 2000). In Vojvodina, [[Serbia]], the same system was used by bell electrifier Mihaly Rozsa, but after his retirement, his systems weren't maintained until end of 2019. Now, one electrician from [[Bečej]] still maintains his work, mercury switches, and motors with brakes by himself.{{Citation needed|date=March 2025}}