Collection of pages from K&E catalogs for the 4150-1 Family of Slide Rules


Catalog pages from the 1954 catalog

The 4150-1 family of slide rules are 5" versions of the 4094 and 4096 Merchant's Slide rules. In the later catalogs (1962 & 1967) it is grouped together under that family name. The slide rule was temporarly introduced in approximately 1951 in the Doric group as a 9050-1.

The 4150-1 also has a modified scale set from its big brothers. The L scale was added.

The following model numbers make up the 4150-1 family of slide rules:

Scale Set:


The 4150-1 first appeared in the 1952 price sheet. The 4150-1 family last appeared in the 1972 catalog. The following is a brief history of the 4150-1 family of slide rules as is told in the K&E catalogs that are available at this time. Exact timing is not possible because of the time between catalogs.

Links to catalog pages for the 4150-1 family of slide rules:

Scans: Link to scans of 4150-1s