2010/003
Fearns circular slide rule
c.1967
Fearns circular slide rule in plastic with metal (brass) screw in centre and conversion factors on reverse (c.1967). Black plastic case.
The rule is in three parts: the stock, transparent slide and cursor. The stock has the scales marked in blue. The scale on the transparent slide is marked in red. The cursor is black.
An example of a simple multiplication calculation is shown in Image 5.
| Acquisition Number | 2010/003 |
|---|---|
| Item Type | |
| Short Description | Fearns circular slide rule |
| Manufactured by | |
| Date of Manufacture | c. 1967 |
| Sub-items | Black plastic case and instruction leaflet. The case has "CIRCULAR SLIDE RULE" printed in gold on the front. |
| Supporting Items | None |
| Makers Number | None |
| Marks | "Made by Fearns Calculators, Oakfield Drive, Whickham, Newcastle-U-Tyne" |
| Dimensions (mm) | 128 (dia) x 3 |
| Donor | |
| Date Donated | October 2010 |
| Materials | Plastic |
| Condition | Good |
| Display Location | William Arrol Building. Level 1. Student Crush Area. Case 14: Middle Shelf |
