Keuffel and Esser 4041

From Wiki

Jump to: navigation, search

Keuffel and Esser Model 4041

Copy 1, Obverse
Copy 1, Obverse
Copy 1, Reverse
Copy 1, Reverse
Copy 2, Obverse
Copy 2, Obverse
Copy 2, Reverse
Copy 2, Reverse
  • Type: Closed Body Enhanced Mannheim
  • Size: 10 Inches / 25 cm
  • Material: Mahogany and celluloid
  • Scales:
    • Front: A [ B C ] D
    • Back: [ S L T ]
  • HvH: best match 4656

Inch and centimeter scales on body. Black paperboard box. A, B, C, D and L scales are unmarked. Unit conversions and materials properties on reverse. Name "Arthur M Jensen" marked on reverse in india ink.

The cursor frame was discontinued in 1915. There is a patent date of 1900 on the body behind the slide. The number "569" is stamped in the end of the body, suggesting this was rule number 569 in a batch. There's no real way to know when the batch was started, so I can only date the rule to be in the 1900-1915 time period.

Copy 2, same dating, batch number 557, no cursor or box.

Retrieved from "http://sliderule.mraiow.com/wiki/Keuffel_and_Esser_4041"
Personal tools