Tuning fork comparator, after Lissajous, Two identical stands + 1 fork

Koenig, Rudolph, Parijs

With this apparatus, different tuning forks can be compared with an electrically driven, standard tuning fork an they can be calibrated. The set-up is an extension of the experiment that Jules Antoine Lissajous (1833-1880) devised in 1857. In this experiment Lissajous made one tuning fork vibrate in horizontal direction and the other one in vertical direction. A tiny mirror was attached to each of the tuning forks. By directing a light beam first on one vibrating mirror and subsequently leading it to the other one, Lissajous could make the Lissajous figures, which are called after him, visible. Each ratio between the frequencies of the tuning forks corresponds with a certain lissajous-pattern. A small difference in frequencies causes a phase difference, which is immediately visible in the pattern. This gives a precision that far exceeds the capacities of the ear.

Administration name

Fysisch Kabinet

Title

Tuning fork comparator, after Lissajous, Two identical stands + 1 fork

Translated title

Tuning fork comparator, after Lissajous, Two identical stands + 1 fork

Creator

[{'date_of_birth': u'', 'role': u'', 'qualifier': '', 'date_of_death': u'', 'creator': 'Koenig, Rudolph, Parijs'}]

Production notes

1875

Material

[{'material': 'Iron'}, {'material': 'Wood'}, {'material': 'Ebonite'}]

Object number

FK 0280 1-2

Reproduction reference

[{'reference': '..\\images\\Fysisch\\Gekoppelde afbeeldingen\\FK 0280-01.jpg'}]