Planimeter Gallery
(courtesy of John Eggers)

Keuffel & Esser Planimeter Gallery

Keuffel & Esser 1102 (4220)

• A mid-1890's model with pole weight and counterbalance
  • slide show
  • gallery

Keuffel & Esser 4212

• A early model (probably pre-1920) with multiplier wheel and counterbalance
  • slide show
  • gallery

Keuffel & Esser 4215 Radial Planimeter

• K & E 4215
  • Manufactured by Ott Dietzgen in the 1930's
  • slide show
  • gallery


• K & E 4215
  • A German manufactured model from the early 1950's
  • slide show
  • gallery
  • radial planimeter manual

Keuffel & Esser 4225

• An early 20th century model with counterbalance and mean height points
  • slide show
  • gallery

Keuffel & Esser 4230

• A pre-1915 model with pole weight and counterbalance with copyright 1891 manual
  • slide show
  • gallery
  • manual

Keuffel & Esser 4235

• Like 4230 but with "arrangement for rapidly computing mean height of indicator diagrams"
  • slide show
  • gallery

Keuffel & Esser 4236 Family

• K & E 4236
  • A U.S. manufactured model from the mid to late 1940's
  • slide show
  • gallery


• K & E 4236
  • A German manufactured model from the very early 1950's
  • A transitional model from the US-made to the German-made models
  • slide show
  • gallery


• K & E 4236
  • A German manufactured model from the early 1950's
  • slide show
  • gallery


• K & E 4236
  • A late 1950's model with a tracer lens
  • slide show
  • gallery


• K & E 620000
  • A mid to late 1970's model with a pole weight and symmetric pole arm
  • Not listed in any K & E catalog
  • slide show
  • gallery


• K & E 4236M (metric)
  • A German manufactured model from the early 1950's
  • slide show
  • gallery


• K & E 620005 (metric)
  • A German manufactured model from the early 1960's
  • slide show
  • gallery

Keuffel & Esser 4238

• K & E 4238
  • A German manufactured model from the late 1920's
  • Carriage has two sockets
  • Supplied with two test rules
  • slide show
  • gallery


• K & E N4238
  • A German manufactured model from the early 1930's
  • A slight variation of the 4238
  • Supplied with only one test rule
  • slide show
  • gallery

Keuffel & Esser 4240

• K & E 4240 manufactured by Coradi
  • A 1915 model
  • slide show
  • gallery


• K & E 4240 with two testing rules
  • A pre-1939 model
  • slide show
  • gallery

Keuffel & Esser 4242

• K & E 4242 manufactured by Coradi
  • A 1918 model
  • slide show
  • gallery


• K & E 4242 with tracer point
  • A pre-WWII model
  • slide show
  • gallery


• K & E 4242 with tracer point
  • A U.S. manufactured model from the mid to late 1940's
  • slide show
  • gallery


• K & E 4242 with tracer point
  • An early 1950's model
  • slide show
  • gallery


• K & E 4242 with tracer lens
  • A late 1950's model
  • Serial number "Muster": a prototype?
  • slide show
  • gallery


• K & E 4242½
  • An early 1950's model
  • slide show
  • gallery

Keuffel & Esser 4246

• A beautiful Amsler No.5 pantograph planimeter
• Acquired by original owner in early 20^th century (probably mid-1920's)
• slide show
  • high resolution slide show (more pictures!)
• gallery

Keuffel & Esser 620115

• A rolling disk planimeter made in the 1960's
• Formerly numbered K & E 4262
• slide show
• gallery

Coradi Rolling Planimeter (Keuffel & Esser 4262)

• A rolling planimeter from the late 19^th century
• Identical to K & E 4262: 12 inch tracer arm and 10 inch telescoping extension
• slide show
• gallery

Keuffel & Esser Amsler No.4

• Distributed by K & E but not listed in any K & E catalog
• slide show
• gallery

Keuffel & Esser Amsler No.6 (with mean height)

• Distributed by K & E but not listed in any K & E catalog
• slide show
• gallery

Miscellaneous Planimeter Gallery

Amsler Radial Planimeter

• A signed Amsler radial planimeter
• slide show
• gallery

Ushikata O-Bac

• A rolling planimeter with a zero-setting mechanism
• slide show
• gallery

Rolling Carriage

• Converts a compensating polar planimeter to a rolling planimeter
• slide show
• gallery