GB384763A - Improvements relating to trigonometrical calculators - Google Patents
Improvements relating to trigonometrical calculatorsInfo
- Publication number
- GB384763A GB384763A GB3081931A GB3081931A GB384763A GB 384763 A GB384763 A GB 384763A GB 3081931 A GB3081931 A GB 3081931A GB 3081931 A GB3081931 A GB 3081931A GB 384763 A GB384763 A GB 384763A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- pivot
- slot
- course
- speed
- 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
- G06G1/10—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation
- G06G1/12—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by the graduation logarithmic graduations, e.g. for multiplication
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
384,763. Plane-trigonometry calculators. MAHONY, G. J., 46, Cranley Gardens, South Kensington, London. Nov. 6, 1931, No. 30819. [Class 106 (i).] A device for determining the courses of aircraft comprises an outer disc A with protractor markings and an inner rotatable disc B having marked upon it circles a representing wind speeds. The outer disc is also marked with speed circles. In the inner disc is a diametral slot c the position of which is indicated by pointers e and in which slides a pin F forming a pivot for a transparent member E having a speed scale b and a series of lines parallel thereto. If the craft is to follow a given course OY, the inner disc B is turned until the slot C is in the wind direction, the pivot F is moved along the slot a distance corresponding to the wind velocity, and the member E is turned about the pivot F until the point Z, indicating the known still-air speed, lies on the course line OY. The course direction FZ is then read on the protractor disc A by means of the parallel line OL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3081931A GB384763A (en) | 1931-11-06 | 1931-11-06 | Improvements relating to trigonometrical calculators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3081931A GB384763A (en) | 1931-11-06 | 1931-11-06 | Improvements relating to trigonometrical calculators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB384763A true GB384763A (en) | 1932-12-15 |
Family
ID=10313632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3081931A Expired GB384763A (en) | 1931-11-06 | 1931-11-06 | Improvements relating to trigonometrical calculators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB384763A (en) |
-
1931
- 1931-11-06 GB GB3081931A patent/GB384763A/en not_active Expired
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