WO2001015913A2 - Parallel rule - Google Patents
Parallel rule Download PDFInfo
- Publication number
- WO2001015913A2 WO2001015913A2 PCT/GB2000/003357 GB0003357W WO0115913A2 WO 2001015913 A2 WO2001015913 A2 WO 2001015913A2 GB 0003357 W GB0003357 W GB 0003357W WO 0115913 A2 WO0115913 A2 WO 0115913A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rule
- parallel
- component
- rules
- package
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L7/00—Straightedges
- B43L7/10—Plural straightedges relatively movable
- B43L7/12—Square and pivoted straightedges
- B43L7/125—Comprising at least two straightedges remaining parallel
Definitions
- This invention relates to parallel rules
- Parallel rules are used for navigation purposes to transfer a direction from one position to another on a chart
- a direction may be taken from a compass rose marked on the chart and drawn through a particular position on the chart so as to indicate a course or a transit
- navigational aids such as sextants or electronic global positioning systems (GPS) it is also necessary to mark a position where a line of latitude intersects a line of longitude, so as to show the craft s position
- GPS global positioning systems
- a parallel rule comprising two component rules each providing one of two opposed parallel straight edges, and a linkage allowing relative movement of the rules in a direction orthogonal to the straight edges but prohibiting relative movement in a direction parallel to the straight edges, wherein at least one component rule has at least one through hole suitable to receive the point of a pencil
- Such a rule may be used conventionally to mark a line of longitude through a particular easting or westing by placing one straight edge parallel to a line of longitude shown on the chart and expanding the rule until one or other straight edge crosses the particular easting or westing indicated at the edge of the chart
- the rule may then be used to mark a northing by placing an edge adjacent the northing scale at the edge of the chart, so that the or a hole is positioned at the required northing, placing the point of a pencil in the hole and expanding the rule to draw a line of latitude on the chart at the required northing
- the line of longitude could be drawn analogously
- both component rules have through holes in corresponding positions This allows one hole to be lined up with the appropriate northing and the pencil point to be inserted in the corresponding hole on the other component rule
- the linkage may comprise an intermediate member connected to each component rule by a respective set of three links, two links in each set being pivotally connected to both the intermediate member and the component rule by pivots situated on corners of a variable parallelogram
- the linkage may comprise two links each pivotally connected to a respective component rule, each pivotally and siidably connected to the other component rule for sliding movement parallel to its straight edge and pivotally connected together between the component rules
- Another aspect of the invention extends to a parallel rule, comprising two component rules each providing one of two opposed parallel straight edges, and a linkage allowing relative movement of the rules in a direction orthogonal to the straight edges but prohibiting relative movement in a direction parallel to the straight edges, the parallel rule being contained by a package, the package being so formed that at least part of the parallel rule is visible therethrough, and so that the component rules may be opened and closed This allows a prospective purchaser to operate the rule without removing it from its package
- the invention provides a parallel rule having two component rules so linked as to constrain them to remain parallel, wherein both component rules are provided on their undersides with a pair of spaced bosses, the bosses being of relatively low friction material, and between the bosses with at least one area of relatively high friction material, the bosses projecting further from the component rules than the high friction areas
- both component rules will be inherently a little flexible, pressing a component rule between the bosses, brings the relatively high friction material into contact with, say, a chart, firmly locating the rule thereon Releasing the pressure raises the relatively high friction area from the chart so allowing the component rule to glide over the chart on the relatively low friction bosses
- One component rule may thus be firmly located while the other is adjusted to its desired position
- FIG. 1 is a plan view of a parallel rule embodying the invention, when closed
- Figure 2 is a cross sectional view of the rule of Figure 1
- Figure 3A is a plan view of the rule of Figure 1 shown in an open position
- Figure 3B is a pictorial detail of an alternative arrangement to that of Figure 1
- Figure 4 is a plan view of another parallel rule embodying the invention, shown in its closed position
- Figure 5 shows the parallel rule of Figure 4 in an open position
- Figure 6 is a pictorial view of the rule of Figure 1 in a package
- Figure 7 is a side view of the parallel rules of Figures 1 to 5
- the parallel rule 2 has two component rules 4 and 6
- Each component rule 4 or 6 has a straight bevelled edge 8 positioned so that the straight edges are opposed and on the outside of the parallel rule
- the component rules 4 and 6 are connected by a linkage 10 which allows relative movement of the rules in a direction orthogonal to the straight edges but prohibits relative movement in a direction parallel to the straight edges
- In each component rule 4 and 6, behind and proximate each straight edge 8, in the bevel thereof, are conveniently positioned a plurality of through holes 12 suitable to receive the point of a pencil
- the holes 12 have a diameter of from 0 5mm to 3mm diameter preferably 2mm diameter, at the underside of the component rules
- the holes are cylindrical for about 1 mm and open out at an included angle of about 60° towards the upper surface of
- the linkage shown in the embodiment of Figures 1 to 3 has an intermediate member 14 positioned between the component rules 4 and 6
- Each component rule is connected to the intermediate member 14 by a set of three linkages 16, 18 and 20 or 16 , 18 and 20'
- the linkages are connected to the component rule 4 or 6 and the intermediate member 14, by pivot pins 22
- the pivot pins connecting the linkages 16 and 20 or 16' and 20' are arranged at the corners of a respective parallelogram so that the distance between the pivot pins of each link is the same as the other in the set Links 16, 16', 20 and 20' are the same length as each other Links 18 and 18' are the same length as each other and in this example as the links 16, 16', 20 and 20'
- the pivot pins 22 are located in the same relative positions on the component rules 4 and 6
- the pivot pins for the links 16, 16', 20 and 20' are located the same distance apart on the intermediate member 14, as on the component rules 4 and 6 Ignoring the links 18, 18 the component rules 4 and 6 can move relative to the intermediate
- FIG. 4 Another linkage which achieves this effect is illustrated in Figure 4
- the component rules 4 and 6 are connected by two links 26
- Each link 26 is pivotally connected to a respective component rule 4 or 6 by one non-sliding pivot pin at 28
- Each link is connected to the other respective component rule by another pivot pin 30 which is shdable in a slot 32 in the component rule
- Each slot 32 is parallel with the relevant straight edge 8
- the links 26 are joined between their ends by a further pivot pin 34 such that the distances between the pivot pin 34 and the pins 28 and are the same as each other
- the pivot pins 28 and the slots 32 are in the same relative positions on both component rules 4 and 6
- each component rule 4 and 6 is provided with bosses 40 of relatively low friction material and at least one area 42 of relatively high friction material
- the bosses 40 may be formed integrally of a plastics material, e g acrylic or polycarbonate, with the component rules 4 and 6
- the bosses are spaced, being placed towards the ends of the component rules
- the relatively high friction areas 42 may be provided, for example by a layer of si cone rubber
- the bosses 40 project further from the undersides of the component rules than do the high friction areas
- the component rule is pressed between its bosses so as to flex the component rule to bring the high friction areas to bear against the chart Placing a pencil point in one of the holes 12 to draw the other component rule across the chart, as described above, does not flex the component rule, so allowing it to glide across the chart on the bosses 40
- a package 50 is provided
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00956705A EP1212203A2 (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
US10/070,499 US6804894B1 (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
AU68572/00A AU6857200A (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
NZ518050A NZ518050A (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
GB0128367A GB2367533B (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9920664.1A GB9920664D0 (en) | 1999-09-01 | 1999-09-01 | Parallel rule |
GB9920664.1 | 1999-09-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001015913A2 true WO2001015913A2 (en) | 2001-03-08 |
WO2001015913A3 WO2001015913A3 (en) | 2001-10-11 |
Family
ID=10860163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2000/003357 WO2001015913A2 (en) | 1999-09-01 | 2000-09-01 | Parallel rule |
Country Status (6)
Country | Link |
---|---|
US (1) | US6804894B1 (en) |
EP (1) | EP1212203A2 (en) |
AU (1) | AU6857200A (en) |
GB (2) | GB9920664D0 (en) |
NZ (1) | NZ518050A (en) |
WO (1) | WO2001015913A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080023424A1 (en) * | 2004-03-12 | 2008-01-31 | Brandon Gerard Sudholt | Methods and apparatus for displaying blister packages |
US7503124B2 (en) * | 2006-12-15 | 2009-03-17 | Black & Decker Inc. | Tool with non-slip feature or friction assembly |
WO2009135215A2 (en) * | 2008-05-02 | 2009-11-05 | John Menendez | Assembly and method for taping walls for painting stripes and patterns |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US46348A (en) * | 1865-02-14 | Improvement in parallel rulers | ||
US458966A (en) * | 1891-09-01 | Scale | ||
US671281A (en) * | 1900-09-27 | 1901-04-02 | George A Kay | Ruling instrument. |
US694185A (en) * | 1902-01-06 | 1902-02-25 | James Page | Parallel-ruler. |
US1059797A (en) * | 1912-04-26 | 1913-04-22 | Luther J Westbook | Rule. |
US1141483A (en) * | 1913-11-25 | 1915-06-01 | Keuffel & Esser Co | Parallel-ruler. |
US1213813A (en) * | 1916-03-10 | 1917-01-30 | Andrew E Anderson | Elevated drafting-rule. |
US1343968A (en) * | 1920-01-06 | 1920-06-22 | William J Hahn | Ruler |
US1410196A (en) * | 1921-08-15 | 1922-03-21 | Joseph A Krivacs | Center gauge |
US1600246A (en) * | 1922-03-14 | 1926-09-21 | Rehnqvist Nils Paul | Parallel ruler |
GB278502A (en) * | 1926-09-14 | 1927-10-13 | Jack Caplin | An improved parallel ruler |
US1746537A (en) * | 1928-02-02 | 1930-02-11 | Knechtel Maxwell Mcm | Plotting instrument |
GB424907A (en) * | 1933-10-30 | 1935-03-04 | William Blaine Luard | Improvements in parallel rules |
US2161236A (en) * | 1938-04-08 | 1939-06-06 | Shaw Albert Edward | Drafting instrument |
US2332100A (en) * | 1941-05-16 | 1943-10-19 | Maclean John Donald | Parallel rule and protractor |
GB619338A (en) * | 1946-12-03 | 1949-03-08 | William Blaine Luard | Improvements in and relating to parallel rules |
FR1191549A (en) * | 1958-02-14 | 1959-10-20 | Improvements to the rules to draw lines | |
DE1511428A1 (en) * | 1966-08-04 | 1969-07-31 | Dahle Wilhelm Metallwaren | Drawing device |
DE1577428A1 (en) * | 1966-08-30 | 1970-01-08 | Mueller Georg Kugellager | Surface grinding machine with swiveling abrasive rotor |
ES234191Y (en) * | 1978-02-23 | 1978-08-16 | IMPROVED DRAWING APPARATUS. | |
US4272890A (en) * | 1979-11-30 | 1981-06-16 | The Boeing Company | Lattice template |
US4455750A (en) * | 1982-07-29 | 1984-06-26 | Sturz Arthur C | Drafting tool for parallel lines |
GB2160478A (en) * | 1984-06-20 | 1985-12-24 | Forbes Sutherland Campbell | Parallel rulers |
US5193284A (en) * | 1992-03-24 | 1993-03-16 | Lin Chin Hsiu | Multi-purpose drawing ruler |
US5426859A (en) * | 1993-12-06 | 1995-06-27 | Fiskars, Inc. | Measuring and drawing instrument |
US5595295A (en) * | 1995-09-18 | 1997-01-21 | Lin; C. S. | Device for keeping and displaying a shearing tool |
US6126008A (en) * | 1998-01-26 | 2000-10-03 | The Brunton Company | Interactive packaging |
-
1999
- 1999-09-01 GB GBGB9920664.1A patent/GB9920664D0/en not_active Ceased
-
2000
- 2000-09-01 GB GB0128367A patent/GB2367533B/en not_active Expired - Fee Related
- 2000-09-01 AU AU68572/00A patent/AU6857200A/en not_active Abandoned
- 2000-09-01 US US10/070,499 patent/US6804894B1/en not_active Expired - Fee Related
- 2000-09-01 NZ NZ518050A patent/NZ518050A/en unknown
- 2000-09-01 WO PCT/GB2000/003357 patent/WO2001015913A2/en not_active Application Discontinuation
- 2000-09-01 EP EP00956705A patent/EP1212203A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
GB2367533B (en) | 2002-09-25 |
GB2367533A (en) | 2002-04-10 |
US6804894B1 (en) | 2004-10-19 |
NZ518050A (en) | 2002-11-26 |
EP1212203A2 (en) | 2002-06-12 |
AU6857200A (en) | 2001-03-26 |
WO2001015913A3 (en) | 2001-10-11 |
GB9920664D0 (en) | 1999-11-03 |
GB0128367D0 (en) | 2002-01-16 |
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