Keuffel & Esser Polar Planimeter Model 4212

Keuffel & Esser Polar Planimeter Model 4212

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Description
This relatively simple German-made stainless steel polar planimeter has arms of fixed length, with measuring wheels near the vertex of the tracer arm and a carrier for a stainless steel weight at the end of the other arm. The carrier is marked: KEUFFEL & ESSER Co. The part of the arm below it is marked on the underside: No 3079. The weight is marked: 80.
A wooden case covered with black leather is lined with purple velvet. A mark on the lid of the case reads: KEUFFEL & ESSER CO. N.Y.
Keuffel & Esser sold this planimeter as the model 1111 from 1892 to 1901 and then as model 4212 from 1901 to 1936. The donor assigned it a date of 1912. The sliding clasp on the case suggests a relatively late date. The model 4212 was one of the simpler planimeters sold by K & E and the 1909 catalog gives a price of $16.50. The instrument was imported by K&E from the firm established in Switzerland by the mathematician and inventor Jakob Amsler. Several other Amsler planimeters are in the collections.
This instrument reached the Smithsonian in 2016.
References:
Clark McCoy, "Collection of Pages from K&E Catalogs for the 4210 Family of Polar Planimeters," at the website www.mccoys-kecatalogs.com/tm.
Keuffel & Esser Company, Catalogue of Keuffel & Esser, 33d ed., New York, 1909, p. 318.
Accession File.
Location
Currently not on view
Object Name
planimeter
date made
ca 1910
maker
Keuffel & Esser Co.
Physical Description
stainless steel (planimeter, weight material)
plastic (measuring discs material)
wood, leather, velvet (case material)
Measurements
overall: 4 cm x 16.4 cm x 6.7 cm; 1 9/16 in x 6 15/32 in x 2 5/8 in
ID Number
2016.0064.04
catalog number
2016.0064.04
accession number
2016.0064
Credit Line
Gift of Maximilian Berktold
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Planimeters
Data Source
National Museum of American History
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