Collection of pages from K&E catalogs for the 4142
Allan Friction Head Slide Rule
Page from the 1915 catalog
The Allan Friction Head Slide Rule is 20" duplex slide rule with celluloid facings on mahogany. The scales are designed for steam pipe calculations.
The 4142 was first shown in the 1915 catalog. The last mention of the 4142 is in the 1927 soft bound catalog.
- 1915 -- The 4142 slide rule was first introduced.
- 1927a - The 4142 was last shown in the 1927 soft bound catalog.
Links to catalog pages for the 4142 family of slide rules: