projection wave machine
Date1896-1920
Inventory Number1998-1-0156
ClassificationWave Model
Subject
Maker
Wm Gaertner & Company
1896 - 1923
Cultural Region
Place of Origin
Dimensions10.4 × 15.2 × 2.9 cm (4 1/8 × 6 × 1 1/8 in.)
Material
DescriptionA wooden frame in which is found three sets of thin rods curved into wave patterns. The higher and lower ones are similar; the middle one is different, showing in fact the addition of the other two. The crank on the right is to rotate the three wave patterns at the same time, which are connected together with three gear wheels. The two windows are made of glass.
In Collection(s)
Signedon instrument: Wm. GAERTNER & Co.
FunctionThis small apparatus was probably used in a classroom with a light projector, so the patterns could be made bigger and seen by the whole class.
Friedrich Fessel
Date: 1850-1864
Accessories: additional wave troughs (2)
Object number: 1996-1-0411
E. S. Ritchie & Sons
Date: 1867-1886
Object number: 1996-1-0354
Wm Gaertner & Company
Date: 1900-1920
Accessories: micrometer eyepiece, eyepiece adaptor
Object number: 1997-1-1836
Wm Gaertner & Company
Date: circa 1920
Accessories: heavy metal stand (attached)
Object number: 0522
Frank S. Baldwin
Date: 1897-1907
Accessories: instruction manual (in object file); history of instrument (both in very poor condition)
Object number: 1997-1-0246
