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Collection of pages from K&E catalogs for the 4142

Allan Friction Head Slide Rule

Description:

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.

History:

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:

• 1915 1916 1921 1922 1925 1927a