Collection of pages from K&E catalogs for the 4092-3 Family of Slide Rules
Description:
The 4092-3 family of slide rules are duplex type of slide rules. The 4092-3 and 4092-5 were constructed on a mahogany frame with celluloid laminated to the surface. The markings are engine divided. The first release in 1922 had the following scales:
- Front: DF = CF CIF CI C = D L
- Rear: LL0 A = B S T C = LL1 LL2 LL3
In 1925 a "K" scale was added and the new scale set is as follows:
- Front: K DF = CF CIF CI C = D L
- Rear: LL0 A = B S T C = LL1 LL2 LL3
The 4092-3 family evolved from the 4092 which was produced from 1906 to 1921. Its scale set was as follows:
- Front: A = B S C = D
- Rear: LL1 LL2 LL3 = C T CI = D L
The following models are part of the 4092-3 family and only vary in length:
- 4092-3 --- 10"
- N4092-3 - 10" (Probably doesn't exists but in catalogs)
- 4092-5 --- 20"
- N4092-5 - 20"
History:
The 4092-3 and 4092-5 first appeared in the 1922 catalog. The 4092-3 family last appeared in the 1937 catalog. The following is a brief history of the 4092-3 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.
The catalogs between 1925 and 1934 show the 4092-3 with the N prefix, however there are no actual examples of slide rules with the N prefix. There are many examples of 4092-3s without the N prefix. It is believed that the N prefix on the 4092-3 in the catalogs is an error on K&E's part. There are actual samples of the N4092-5. Probably the dropping of the N prefix on the 4092-5 in 1927 was also an error.
- 1922 -- The 4092-3 and 4092-5 were introduced in the 1922 catalog.
- 1925 -- The "K" scale was added to the rules. The 'N' prefix was added to both rules.
- 1927a - The 'N' prefix is dropped from the 4092-5.
- 1927b -- The 'N' prefix is added back to the 4092-5.
- 1936 -- The "improved metal framed" cursor was introduced. The 'N' prefix was dropped from the 4092-3.
- 1938 -- The 4092-3 and N4092-5 last appeared in the 1938 price list.
Links to catalog pages for the 4092-3 family of slide rules:
Link to scans of 4092-3s