Accession No

5389

Brief Description

slide rule in plastic with a magnifying attachment, by Aristo, German, 20th Century

Origin

Germany

Maker

Aristo

Class

calculating

Earliest Date

1960

Latest Date

1975

Inscription Date

Material

plastic; metal

Dimensions

length 337mm; width 48mm; height with attachment 37mm

Special Collection

Provenance

Donated on 17/05/1999.

Inscription

on lower stock left side
“ARISTO-STUDIO”
on slide
“ARISTO
Nr.968
MADE IN GERMANY”

Description Notes

ARISTO STUDIO 968 slide rule in plastic with a magnifying attachment, 20th Century. Plastic cursor moves along scale; black central line for index itself. Two further black lines to the left and right of centre line equal distance apart and one other line on right side. Plastic and metal clipped attachment (can be removed) to magnify the index line and numbers on the rule. Rubber feet to prevent movement whilst on desk.

Upper part of stock carries
tangent scale marked ‘T’ divided 5.5 to 45, numbered 5.5,6,7...20,25,30...45;
co-tangent scale reading right to left, marked ‘ctg’ divided 50 to 80, numbered 50, 55...80; sine and tangent scale for small angles marked ‘ST’ divided .55 to 6, numbered .55, .6, .7...1, 1.5...3,4...6; folded scale marked ‘DF’ (also present on the slide marked ‘CF’) divided 3 to 3, numbered 3π, 4, 5...9, 1, 1, 2,3...2, 3π;

Slide carries reciprocal of principal scale marked ‘CIF’ reading right to left, divided 3 to 3, numbered 3π, 4, 5...9, 1, 1, 2,3...2, 3π; reciprocal of principal scale marked ‘CI’ divided 1 or 1[0] to 1[0] or [00] etc numbered 1, 1, 2, 3, 4,...2, 3, 4...9, 1;
double log scale marked ‘C’ (and also on lower stock marked as ‘D’) divided 1 or 1[0] to 1[0] or [00] etc numbered 1, 2, 3, 4...2, 3, 4...9, 1;

Lower stock carries scale marked ‘P’ divided 0.995 to 0, numbered .995, .99, .98....9, .8, .7....2, 0; sine scale marked ‘S’ divided 5.5 to 90, numbered 5.5, 6, 7...20, 25, 30, 25...40, 50...90; cosine scale on lower edge, divided 10 to 80 numbered 10, 20...40, 45...80;

reverse upper stock carries log scales run concurrently across three lines scale marked ‘LL03’ divided 10¯5 to .4 numbered 10¯5, 2, 5, 10¯4...10¯2, .02, .04....1, .15, .2....4; scale marked ‘LL02’ divided .35 to .91 numbered .35, .4, .45....9, .91; scale marked ‘LL01’ divided .9 to .99 numbered .9, .91....95, .955....99;
double log scale marked ‘A’ (also present on the slide marked ‘B’) divided

reverse slide carries scale marked ‘L’ common log scale divided .0 to 1, numbered .0, .1...1.0; cube scale numbered 1, 2, 3,...1, 2, 3,...1, 2, 3...1; log scale marked ‘C’ (also present on slide as ‘D’) numbered 1, 2, 3...2, 3, 4....1;

lower stock carries log scales run concurrently across three lines scale marked ‘LL3’ divided 1.01 to 1.11 numbered 1.01, 1.015, 1.02...1.05, 1.06...1.11; scale marked ‘LL2’ divided 1.1 to 3 numbered 1.1, 1.12, 1.14...1.2, 1.25...1.4, 1.5...2, 2.5, 3; scale marked ‘LL1’ divided 2.5 to 10¯5 numbered 2.5, e, 3, 4,...10, 15,20, 30, 40, 50, 100, 2, 3, 4, 5, 10¯3...10¯4, 2, 5, 10¯5 ;

Condition good

References

Events