GB413451A - Improvements relating to slide rules - Google Patents
Improvements relating to slide rulesInfo
- Publication number
- GB413451A GB413451A GB1063333A GB1063333A GB413451A GB 413451 A GB413451 A GB 413451A GB 1063333 A GB1063333 A GB 1063333A GB 1063333 A GB1063333 A GB 1063333A GB 413451 A GB413451 A GB 413451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drum
- drums
- spindle
- gears
- root
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G1/00—Hand manipulated computing devices
- G06G1/02—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
- G06G1/04—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Helmets And Other Head Coverings (AREA)
Abstract
413,451. Calculating - apparatus. GWILLIAM, V. C. E. MARTEN-, Parkhurst, Abinger Common, Dorking, Surrey. April 10, 1933, No. 10633. [Class 106 (i).] Slide-rules for attachment to a desk or drawing-board comprise a pair of drums freely mounted on a common axis and provided with means whereby the drums can be interconnected and moved relatively by means of a differential gearing. The drums are provided with logarithmic scales on their peripheries the length of the scales equalling the circumference of the drums. Amongst other calculations the device is adapted to determine the square, cube, or other root of any quantity. In the form shown in Figs. 1 and 2, a body A with a plinth D and bracket E for supporting it on a desk or underside of a drawing-board has a boss G carrying a hollow spindle F on which is loosely mounted two drums H, J. The drum H is rotatable by a knob L on a spindle K which carries an eccentric O operating in a slot in a lever Q. When the spindle K is rotated the eccentric O forces a wedge on the lever Q into a groove T, Fig. 4, on the drum J whereby this drum may be rotated with the drum H. The drum H carries bearings for planetary gears a, band e, f on spindles with press knobs d and g. The gears a, e gear with a sun wheel V on the fixed spindle F. When one of the knobs d or g is pressed in the gears b or f mesh with a sun pinion c on the drum J. By this means a partial rotation is imparted to the drum J relatively to the rotations of the drum H, the ratio of the gearing being chosen in accordance with the order of the root of the quantity to be ascertained. A fixed cursor B is mounted in an extension C of the body A. A suitable stop is provided to determine the initial position of the drum H and springs m press on the body A to prevent drum J moving when the drum H is released therefrom and rotated alone. Compensation for any wear in the square root or cube root gears is effected by adjusting conical points screws q, Figs. 1, and 6, in slots p in the spindle F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1063333A GB413451A (en) | 1933-04-10 | 1933-04-10 | Improvements relating to slide rules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1063333A GB413451A (en) | 1933-04-10 | 1933-04-10 | Improvements relating to slide rules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB413451A true GB413451A (en) | 1934-07-19 |
Family
ID=9971462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1063333A Expired GB413451A (en) | 1933-04-10 | 1933-04-10 | Improvements relating to slide rules |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB413451A (en) |
-
1933
- 1933-04-10 GB GB1063333A patent/GB413451A/en not_active Expired
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