CA1214932A - Navigational aid device - Google Patents
Navigational aid deviceInfo
- Publication number
- CA1214932A CA1214932A CA000445392A CA445392A CA1214932A CA 1214932 A CA1214932 A CA 1214932A CA 000445392 A CA000445392 A CA 000445392A CA 445392 A CA445392 A CA 445392A CA 1214932 A CA1214932 A CA 1214932A
- Authority
- CA
- Canada
- Prior art keywords
- disc
- carrier
- map
- movable
- aid device
- 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
Abstract
ABSTRACT
A navigational aid device of the type comprising a disc support-ing a map, especially a chart, a protractor being movable over said map, a first carrier movable in the longitudinal direction of said disc, and a second carrier which is movable on said first carrier and in the transversal direction of said disc and upon which said protractor is rotatably jour-nalled. Said first carrier consists of at least one ruler extending across said disc and situated upon said map and sliding means situated between said map and said disc and connected to said at least one ruler, said sliding means being provided with at least one guide member movable along track means provided on and extending longitudinally of said disc.
A navigational aid device of the type comprising a disc support-ing a map, especially a chart, a protractor being movable over said map, a first carrier movable in the longitudinal direction of said disc, and a second carrier which is movable on said first carrier and in the transversal direction of said disc and upon which said protractor is rotatably jour-nalled. Said first carrier consists of at least one ruler extending across said disc and situated upon said map and sliding means situated between said map and said disc and connected to said at least one ruler, said sliding means being provided with at least one guide member movable along track means provided on and extending longitudinally of said disc.
Description
Navigational_d device The present invention is related to a navigational aid device of the type comprising a disc supporting a map, especially a chartg a protractor being movable over said map, a first carrier movable in the longitudinal direction of said disc, and a second carrier which is movable on said first carrier and in the transversal direction of said disc and upon which said protractor is rotatably journalled.
Such a navigational aid device is shown and described in the Swedish patent No. 409 620. When using said previously known device it is troublesome to change charts and it is also difficult to fix sald chart in a position to be held firmly in position at quick movements, e.g. when said device i8 placed down on a floor or ground with Force against its edge.
An object with the invention is to provide 3 naYigatlonal aid device of the type named above, which device will set the drawbacks with previnusly known devices aside and which device is easy to handle~ holds the map firmly and secure in its position, and is uncomplicateJ according to it~ constructions and function. Said device can with advantage be used except for charts even for maps used in track-finding, flylng navigation and similar occasions when courses are to be determined on a map.
This object is achieved according to the invention by a navi-gational aid device in which said first carrier consists of at least one ruler extending across said disc and situated upon said map and sliding means situated between said map and said disc and connected to said at least one ruler, said sliding rneans being provided with at lsast one guide member movable along track rneans provided on and extending longit~dinally of said ~isc.
The invention will now be more closely explained with refer-ence to the accompanying drawings, in which Fig. 1 shows a plane view of a first embodiment of a naviga-tional aid device according to the invention, Fig. 2 shows a view similar to that in Fig. 1 but with a chart placed on said navigational aid device.
Fig. 3 shows an exploded view of a second embodiment of said navigational aid device.
Fig. 4 shows partially a sectional view taken on line~ IV-IV in Fig. 3.
In Figs. 1 and 2 a navigational aid device according to the invention is ~hown, Fig. 1 showing said devlce without and Fig. 2 with a chart in position. The navigational aid device comprises a disc 1 which i5 3~
plane and substantially rectangular, a first carrier consisting of, on one hand, an upper ruler 2 which is provided on and movable along said disc, and, on the other hand, a sliding part 3 which at its ends is connected to the ends of said ruler 2 and which has guide means movable in a track 5 in said disc 1, a second carrier 6 provided on said upper ruler 2 and movable in the cross-direction of said disc, and a protractor 7 rotatably journalled on the second carrier 6. Within the scope of the present invention the first carrier 2, 3 can be movable in the longitudinal direction of said disc and the second carrier 6 in the transversal direction of said disc.
Further, said chart is placed in an envelope of flexible, transpar0nt plastics fastened at the upper edge of said disc. The lower edge of said envelope is overlapping the lower edge of sald disc and is detachably fastened on the ~ackside of said disc. Of course, said envelope can be held firmly in other ways within the scope of th~ invention. It is of great importance that the chart is held firmly against rotational movements in relation to said disc 1. Said chart need not to be placed in an envelope, but can be placed directly on said disc, e.g. using charts which have been covered in advance with plastics. In this case, fastening means for this purpose can be provided on the upper or lowPr edge sides of said disc.
In Fig. 2 a chart is placed on said disc between the sliding part 3 and the ruler 2 of said first carrierO
The second carrier 6 is provided with four northern-markings in the lForm of an "N". These markings "N" are provided at 11, 12, 13 and 14 in Fig. 1. The purpose thereof is that the positioning of said chart on said navigational aid device can be varied so that the northern rnarking "N" is used which corresponds to the northern position of said chart. It is to be noted that the scale of said protractor 7 is made so that the scale numbers increase clockwise thereon.
Also, before the chart is placed upon said device9 depending upon the weather, it can be introduced in a separate envelope of plastics.
A stop means i5 is provided on said second carrier. This stop means firmly locks said first carrier 2, 3 and said second carrier 6 in relation to each other by means of a simple manipulation. Moreover, a locking member 16 i5 provided to firmly lock said first carrier 2 on said disc.
A recess 17 is provided on said protractor 7 by means of which one can easily grip the same and turn it to the desired position.
In Figs. 3 and 4 a second embodiment of said navigational aid device according to the invention i8 shown, comprising a disc 20, a first carrier 21 movable in the longitudinal direction of and upon said disc, a second carrier 22 movably connected to said first carrier 21 to be moYed in the transversal direction of said disc 20, and first and second protraetor parts 23 and 24, respectively, being rotatably journalled on said first carrier 220 The first carrier 21 comprises two rulers 25 and 26, respectively, betwe0n which sliding members 27 and 28, respQctively, are provided. In the centre of said disc and in the longitudinal direction thereof a plate 29 is fastened, in such a way that tracks are prnvided at the longitudinal edges thereof at 30 and 31, respectively. The sliding members 27 and 28 each being provlded with guide edges 32 and 33, respectively, at the inner ends thereof9 said guide edges being introduced in said tracks 30 and 3180 that said first earrier can be in the longitudinal direction of said disc.
The second carrier 22 consists of a plate with a circular hole in the middle thereof is intended to receive the rings 23 and 2h defining the protractor. Those rings 23 and 24 are held in place by holders 34, 35 and 36.
Further, the second carrier has two parallel edges 37 and 38 which are bent so as to define parallel channels on the under side of said carrier receiving the outer edges of the rulers 259 26 of said first carrier 21 to provide for the transversal reciprocatiny movement thereof.
In Fig. 3 some sectional views 39, 40, 41 and 42 are shown to make the sectional areas of the rings 22? 239 the second carrier 22 and the first carrier 22 clear.
In Fig. 4 it is shown how the guide edges 32, 33 of the sliding members 27 ar:d 28, respectively, are receivPd in the tracks 30, 31 between the plate ~9 and the disc 20.
In this embodiment two rings 239 24 are provided instead of the ring 7 in ~he first embodiment due to the fact that the second embodiment is fnrmed to take the deviation into ~onsiderationO For this purpose the second carrier 22 is provided with scales 43 and 440 The position of the map or the envelope which shall receive the map is schematically shown by means of the curved lines 45, 46 in Fig. 3 A stop rneans 47 is provided to firmly lock the first carrier in relation to the disc9 and another stop means 48 is provided to firmly lock the position of the second carrier 44 in relation to the first carrier.
The navigational aid device according to the invention is of course not limited to the shape of the parts shown on said drawings, but said first carrier, said second carrier and other details can be formed in other ways within the 3cope of the present invention. For exan-~ple, the first carrier can be detachable in two or more parts which by means of an easy motion can be disa~sembled or as~smbled.
Such a navigational aid device is shown and described in the Swedish patent No. 409 620. When using said previously known device it is troublesome to change charts and it is also difficult to fix sald chart in a position to be held firmly in position at quick movements, e.g. when said device i8 placed down on a floor or ground with Force against its edge.
An object with the invention is to provide 3 naYigatlonal aid device of the type named above, which device will set the drawbacks with previnusly known devices aside and which device is easy to handle~ holds the map firmly and secure in its position, and is uncomplicateJ according to it~ constructions and function. Said device can with advantage be used except for charts even for maps used in track-finding, flylng navigation and similar occasions when courses are to be determined on a map.
This object is achieved according to the invention by a navi-gational aid device in which said first carrier consists of at least one ruler extending across said disc and situated upon said map and sliding means situated between said map and said disc and connected to said at least one ruler, said sliding rneans being provided with at lsast one guide member movable along track rneans provided on and extending longit~dinally of said ~isc.
The invention will now be more closely explained with refer-ence to the accompanying drawings, in which Fig. 1 shows a plane view of a first embodiment of a naviga-tional aid device according to the invention, Fig. 2 shows a view similar to that in Fig. 1 but with a chart placed on said navigational aid device.
Fig. 3 shows an exploded view of a second embodiment of said navigational aid device.
Fig. 4 shows partially a sectional view taken on line~ IV-IV in Fig. 3.
In Figs. 1 and 2 a navigational aid device according to the invention is ~hown, Fig. 1 showing said devlce without and Fig. 2 with a chart in position. The navigational aid device comprises a disc 1 which i5 3~
plane and substantially rectangular, a first carrier consisting of, on one hand, an upper ruler 2 which is provided on and movable along said disc, and, on the other hand, a sliding part 3 which at its ends is connected to the ends of said ruler 2 and which has guide means movable in a track 5 in said disc 1, a second carrier 6 provided on said upper ruler 2 and movable in the cross-direction of said disc, and a protractor 7 rotatably journalled on the second carrier 6. Within the scope of the present invention the first carrier 2, 3 can be movable in the longitudinal direction of said disc and the second carrier 6 in the transversal direction of said disc.
Further, said chart is placed in an envelope of flexible, transpar0nt plastics fastened at the upper edge of said disc. The lower edge of said envelope is overlapping the lower edge of sald disc and is detachably fastened on the ~ackside of said disc. Of course, said envelope can be held firmly in other ways within the scope of th~ invention. It is of great importance that the chart is held firmly against rotational movements in relation to said disc 1. Said chart need not to be placed in an envelope, but can be placed directly on said disc, e.g. using charts which have been covered in advance with plastics. In this case, fastening means for this purpose can be provided on the upper or lowPr edge sides of said disc.
In Fig. 2 a chart is placed on said disc between the sliding part 3 and the ruler 2 of said first carrierO
The second carrier 6 is provided with four northern-markings in the lForm of an "N". These markings "N" are provided at 11, 12, 13 and 14 in Fig. 1. The purpose thereof is that the positioning of said chart on said navigational aid device can be varied so that the northern rnarking "N" is used which corresponds to the northern position of said chart. It is to be noted that the scale of said protractor 7 is made so that the scale numbers increase clockwise thereon.
Also, before the chart is placed upon said device9 depending upon the weather, it can be introduced in a separate envelope of plastics.
A stop means i5 is provided on said second carrier. This stop means firmly locks said first carrier 2, 3 and said second carrier 6 in relation to each other by means of a simple manipulation. Moreover, a locking member 16 i5 provided to firmly lock said first carrier 2 on said disc.
A recess 17 is provided on said protractor 7 by means of which one can easily grip the same and turn it to the desired position.
In Figs. 3 and 4 a second embodiment of said navigational aid device according to the invention i8 shown, comprising a disc 20, a first carrier 21 movable in the longitudinal direction of and upon said disc, a second carrier 22 movably connected to said first carrier 21 to be moYed in the transversal direction of said disc 20, and first and second protraetor parts 23 and 24, respectively, being rotatably journalled on said first carrier 220 The first carrier 21 comprises two rulers 25 and 26, respectively, betwe0n which sliding members 27 and 28, respQctively, are provided. In the centre of said disc and in the longitudinal direction thereof a plate 29 is fastened, in such a way that tracks are prnvided at the longitudinal edges thereof at 30 and 31, respectively. The sliding members 27 and 28 each being provlded with guide edges 32 and 33, respectively, at the inner ends thereof9 said guide edges being introduced in said tracks 30 and 3180 that said first earrier can be in the longitudinal direction of said disc.
The second carrier 22 consists of a plate with a circular hole in the middle thereof is intended to receive the rings 23 and 2h defining the protractor. Those rings 23 and 24 are held in place by holders 34, 35 and 36.
Further, the second carrier has two parallel edges 37 and 38 which are bent so as to define parallel channels on the under side of said carrier receiving the outer edges of the rulers 259 26 of said first carrier 21 to provide for the transversal reciprocatiny movement thereof.
In Fig. 3 some sectional views 39, 40, 41 and 42 are shown to make the sectional areas of the rings 22? 239 the second carrier 22 and the first carrier 22 clear.
In Fig. 4 it is shown how the guide edges 32, 33 of the sliding members 27 ar:d 28, respectively, are receivPd in the tracks 30, 31 between the plate ~9 and the disc 20.
In this embodiment two rings 239 24 are provided instead of the ring 7 in ~he first embodiment due to the fact that the second embodiment is fnrmed to take the deviation into ~onsiderationO For this purpose the second carrier 22 is provided with scales 43 and 440 The position of the map or the envelope which shall receive the map is schematically shown by means of the curved lines 45, 46 in Fig. 3 A stop rneans 47 is provided to firmly lock the first carrier in relation to the disc9 and another stop means 48 is provided to firmly lock the position of the second carrier 44 in relation to the first carrier.
The navigational aid device according to the invention is of course not limited to the shape of the parts shown on said drawings, but said first carrier, said second carrier and other details can be formed in other ways within the 3cope of the present invention. For exan-~ple, the first carrier can be detachable in two or more parts which by means of an easy motion can be disa~sembled or as~smbled.
Claims
1. A navigational aid device of the type comprising a disc support-ing a map, especially a chart, a protractor being movable over said map, a first carrier movable in the longitudinal direction of said disc, and a second carrier which is movable on said first carrier and in the transversal direction of said disc and upon which said protractor is rotatably jour-nalled, characterized in that said first carrier consists of at least one ruler extending across said disc and situated upon said map and sliding means situated between said map and said disc and connected to said at least one ruler, said sliding means being provided with at least one guide member movable along track means provided on and extending longitudinally of said disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000445392A CA1214932A (en) | 1984-01-16 | 1984-01-16 | Navigational aid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000445392A CA1214932A (en) | 1984-01-16 | 1984-01-16 | Navigational aid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1214932A true CA1214932A (en) | 1986-12-09 |
Family
ID=4126950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445392A Expired CA1214932A (en) | 1984-01-16 | 1984-01-16 | Navigational aid device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1214932A (en) |
-
1984
- 1984-01-16 CA CA000445392A patent/CA1214932A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |