Sisävuoro

Sisävuoro is a Finnish type of tiedemann clock, which is a type of mechanical clock that strikes the time. The term Sisävuoro specifically refers to a invention by a Finnish clockmaker, Juho Väänänen, in the early 20th century. Väänänen improved upon the traditional tiedemann clock mechanism and created a self-acting movement, which struck the hours on a drum and played a melody.

The mechanism of a Sisävuoro clock consists of a main gear, a drum, and a series of levers and gears that trigger the drum to strike the hours and play a melody. The clock runs on a mechanical spring, which powers the movement. Sisävuoro clocks are known for their compact design and are often found in small agricultural buildings, where a striking clock can be heard by people working in the surrounding area.

Sisävuoro clocks have become an important part of Finnish cultural heritage, particularly in rural areas. Many Sisävuoro clocks have been preserved and restored to their former glory. In addition, the construction methods used to build these clocks are appreciated for their traditional craftsmanship and represent an important aspect of Finnish clockmaking history. Overall, Sisävuoro clocks are a unique example of early 20th-century mechanical clock design.