GB598167A - Improvements in or relating to computing instruments - Google Patents
Improvements in or relating to computing instrumentsInfo
- Publication number
- GB598167A GB598167A GB1467243A GB1467243A GB598167A GB 598167 A GB598167 A GB 598167A GB 1467243 A GB1467243 A GB 1467243A GB 1467243 A GB1467243 A GB 1467243A GB 598167 A GB598167 A GB 598167A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scale
- disc
- time scale
- indicator
- wheel
- 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
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/12—Measuring wheels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
598,167. Computing-apparatus. NEWTON, E. P. (Reece, F. A.). Sept. 7, 1943, No. 14672. [Classes 106 (i), 106 (ii) and 106 (iv)] A computing instrument, for use with maps, comprises a traction element movable over a map 'surface in contact therewith, a time scale graduated in units of time, a movable indicator, means connecting said traction element and indicator to cause said indicator to move relatively to said time scale distances proportional to the distances traversed by said element, said time scale being adjustable to cause said indicator to indicate on said time scale variable times with respect to the distances traversed by said element, and a speed scale for indicating the adjustment of said time scale. As shown in Figs. 1, 2, 3 and 8, the instrument has front and rear face plates 20 and 21 secured together to form a casing. Projecting from the bottom of this casing is a pointer 25 and a traction wheel 24 for traversing distances on a map. The wheel 24 is geared to a disc 30 on the rear of which is a circular distance scale 33 visible through an opening 34 in the plate 21 and graduated in miles. The wheel 24, the gearing and the scale 33 are so co-ordinated that when the wheel 24 traverses a certain distance on the map, the corresponding distance in miles will be indicated on the scale 33 by an index mark 35. On its front face the disc 30 is inscribed with a spiral line 36 which acts as an indicator and intersects a radial slot 37, Figs. 1 and 8, in the front plate 20. The slot 37 is also intersected by a series of spiral lines 38 inscribed in a transparent disc 32 above the disc 30. The slot 37 has a transparent cover 370 with a reference line 371 on it constituting a time scale, the graduations of which comprise the portions of the lines 38 visible through the slot 37. The disc 32 is provided with a circular speed scale 41 outside the spiral lines 38 and part of which is visible through an opening 39, Figs. 1 and 8, on the plate 20. The user of the instrument can vary the graduations of the time scale 371, 38 by turning the disc 32 by means of its serrated edge.
Publications (1)
Publication Number | Publication Date |
---|---|
GB598167A true GB598167A (en) | 1948-02-12 |
Family
ID=1730920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1467243A Expired GB598167A (en) | 1943-09-07 | Improvements in or relating to computing instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB598167A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145522A (en) * | 1983-08-02 | 1985-03-27 | Kenneth John Griffiths | Map aid for walkers |
GB2261071A (en) * | 1991-11-02 | 1993-05-05 | William Alexander Courtney | A combined navigation and first aid kit for outdoor use |
-
1943
- 1943-09-07 GB GB1467243A patent/GB598167A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145522A (en) * | 1983-08-02 | 1985-03-27 | Kenneth John Griffiths | Map aid for walkers |
GB2261071A (en) * | 1991-11-02 | 1993-05-05 | William Alexander Courtney | A combined navigation and first aid kit for outdoor use |
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