Collection of pages from K&E catalogs for the 4133 Family of Slide Rules
The Roy Lance Electrical Slide rule
Description:
1921 catalog page
The 4133 is a specialized slide rule for Electricians. The 4133 is an 8" Mannheim rule modeled after the 4053-2. The bottom edge has special scales for calculating wire sizes.
The following model numbers are part of the 4133 Slide Rule family:
- 4133 ------ 8" Electrician's Slide Rule
- N4133 ---- 8" Electrician's Slide Rule
Scale set #1 (1913-1922) for the 4133:
- inch/A = B C = D|B&SGuage
- = S L T =
Scale set #2 (1925-1936) for the N4133:
- inch/A = B CI C = D|B&SGuage
- = S L T =
Scale set #3 (1936-1949) for the N4133:
- inch/A = B CI C = D K|B&SGuage
- = S L T =
History:
The 4133 first appeared in a loose addendum to the 1933 hardbound catalog. The following is a brief history of the 4133 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.
- 1913a - The 4133 was first shown in an addendum to the 1913 hardbound catalog.
- 1915 -- The all glass cursor was introduced.
- 1925 -- The N4133 replaced the 4133. The CI scale was added.
- 1936 -- The all glass cursor was replaced with the metal rimmed cursor in 1936. Also the K scale was added to the rule.
- 1943 -- The N4133 was not in the 1943 catalog
- 1947 -- The N4133 was listed "temp. disc." in the 1947 price list.
- 1949a - The N4133 was shown in the 1949 catalog.
- 1952 -- The N4133 was listed "temp. disc." in the 1952 price list.
- 1954 -- The N4133 is not shown in the 1954 catalog.
Links to catalog pages for the 4133 family of slide rules:
Scans: Link to scans of 4133s