CN105157497A - Bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool - Google Patents
Bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool Download PDFInfo
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- CN105157497A CN105157497A CN201510509912.6A CN201510509912A CN105157497A CN 105157497 A CN105157497 A CN 105157497A CN 201510509912 A CN201510509912 A CN 201510509912A CN 105157497 A CN105157497 A CN 105157497A
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Abstract
The invention relates to a special teaching aid for teaching, in particular, a bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool. The lower surface of a sliding part is a sliding lower plane; the upper surface of an edge ruler part is an edge ruler upper plane; a rotation through hole is formed in the sliding lower plane; an edge ruler step hole is formed in the edge ruler upper plane; the sliding lower plane is provided with a bearing pin shaft; the bearing pin shaft is provided with a pin shaft bearing segment; a pin shaft step is located between the pin shaft bearing segment and the bearing pin shaft; the outer end of the pin shaft bearing segment is a bearing segment outer end; the pin shaft bearing segment is provided with a clamping ring groove which is separated from the bearing segment outer end by 1.3 to 1.5mm; a rolling bearing inner ring is fixed to the pin shaft bearing segment; the inner side of the rolling bearing inner ring is attached to the pin shaft step; a shaft-used open pin is arranged on the clamping ring groove; the shaft-used open pin is arranged at the outer side of the rolling bearing inner ring in a blocking manner; and a shaft pin rivet passes through the rotation through hole and the edge ruler step hole successively, so that the sliding lower plane can be in rotation lap connection with the edge ruler upper plane through the shaft pin rivet.
Description
Technical field
The present invention relates to the upper teaching aid special of a kind of teaching, International Classification of Patents is B43L, particularly relates to bearing slideway through hole corner aluminium niobium alloy isoplanar adjusting triangle measurer.
Background technology
Mathematics is one of important subject, and in Junior Mathematics, triangle geometry is most important.Learning triangle geometry well is junior middle school's plane geometry and even the most important basis of senior middle school's solid geometry.
At present, in teaching, the teaching aid of religion geometry has ruler, set square etc., and they exist many drawbacks: carry inconvenience, uses also inconvenient, prior or function singleness.When imparting knowledge to students drawing, user can only be online basic previous step one step draw figure required for oneself, drawing course is loaded down with trivial details, and it is not directly perceived, more can not training student association, analogy, observation and manipulative ability preferably, teacher should draw and say again, very busy, adds great work difficulty to education personnel.Chinese patent: the adjustable set square (patent No.: 2011200369592), but cannot accomplish that its three bars chi is at same plane, there is comparatively big error, another Chinese patent: the adjustable multipurpose four bar chi (patent No.: 2013201682530), also be to accomplish that its four bars chi is at same plane, still exists comparatively big error; Also has only one China patent: (patent No.: 2014208739549) remains and cannot accomplish that each ruler is at same plane, is all to there is comparatively big error multifunctional teaching gauge.
Summary of the invention
For above prior art Problems existing, the present invention adopts bearing slideway, to the design that measurer regulates, achieve the different specification square of sizes or rectangle, bearing slideway through hole corner aluminium niobium alloy isoplanar adjusting triangle measurer one step can be shared and accurately put in place.Specific as follows:
Bearing slideway through hole corner aluminium niobium alloy isoplanar adjusting triangle measurer, comprise the first adjustable rule, the second adjustable rule and the 3rd adjustable rule that three physical dimensions are identical, every adjustable rule is made up of, as improvement limit chi part and slippage part:
The lower surface of described slippage part is slippage lower plane, and the upper surface of described limit chi part is plane on the chi of limit; Slippage lower plane there is rotation through hole, limit chi plane has limit chi stepped hole; Slippage lower plane has on slippage lower plane and have bearing bearing pin, bearing bearing pin there is pivot pin bearing section, it is pivot pin step between pivot pin bearing section and described bearing bearing pin, described pivot pin bearing section outer end is bearing section outer end, and the pivot pin bearing section apart from bearing section outer end being 1.3 to 1.5 millimeters of positions has snap ring groove; Described pivot pin bearing section is fixed with rolling bearing inner ring, and rolling bearing inner ring inboard againsts pivot pin step, snap ring groove has axle split pin, and axle split pin keeps off outside rolling bearing inner ring;
Slippage lower plane there is corner window, plane has corner scale with limit chi; On the chi of limit, planar inner has scale slope, and length scale is also engraved on scale slope;
Plane there is bearing slideway with limit chi, and bearing slideway and limit chi have transition to slot between plane, bottom bearing slideway, have blind slot space, and the single-ended opening of described bearing slideway; Described axle split pin can be positioned among described blind slot space, has space between axle split pin and blind slot space;
Pivot pin rivet passes through successively and rotates through hole and limit chi stepped hole, and pivot pin rivet to be overlapped on the chi of limit in plane by rotatable for slippage lower plane; On described slippage lower plane and described limit chi, plane is in sustained height;
First adjustable rule is made up of the first limit chi part and the first slippage part, and the second adjustable rule is made up of Second Edge chi part and the second slippage part, and the 3rd adjustable rule is made up of the 3rd limit chi part and the 3rd slippage part;
Bearing slideway in the first described limit chi part and between the skid bearing in the 3rd slippage part for being slidably matched, bearing slideway in described Second Edge chi part and between the skid bearing in the first slippage part for being slidably matched, the bearing slideway in the 3rd described limit chi part and between the skid bearing in the second slippage part for being slidably matched;
As further improvement: the first described adjustable rule, the second adjustable rule, the 3rd adjustable rule and the 4th adjustable rule are all adopt the light-duty alloy steel of aluminium nickel on the whole, its material composition is: Nb(niobium): 17 ~ 19%, W (tungsten): 2.4 ~ 2.6%, Cu(copper): 2.4 ~ 2.6%, Mo(molybdenum): 1.4 ~ 1.6%, C(carbon): 1.1 ~ 1.3%, surplus is Al(aluminium) and inevitable impurity; The weight percent content of described impurity is: Sn(tin) be less than 0.05%, Si(silicon) be less than 0.20%, Mn(manganese) be less than 0.25%, S(sulphur) be less than 0.010%, P(phosphorus) be less than 0.015%; The Specifeca tion speeification of the described light-duty alloy steel material of aluminium nickel is: Rockwell's hardness HRC value is 41 ~ 43, and density is 3.4 to 3.6 grams every cubic centimetre.
As further improvement: the angle on described scale slope and limit chi between plane is 41 ~ 43 degree.
As further improvement: described length scale texture depth is 0.27 to 0.29 millimeter.
As further improvement: there is stepped hole angle face chi stepped hole both sides, limit, the angle between the stepped hole angle face of both sides is 52 to 54 degree.
beneficial effect of the present invention:
One, described slippage part is positioned at described chi part one end, limit and is overlapped on plane in the chi part of limit, and on described slippage lower plane and described limit chi, plane is in sustained height, guarantees that the length scale on three limits is all in same level, avoids error on line of sight; And the skid bearing on every adjustable rule and between the bearing slideway on adjacent activities chi for being slidably matched, particularly plane there is limit chi corner scale corresponding in position with the corner window on slippage lower plane, convenient, intuitively between control slippage part and limit chi part the anglec of rotation can be accomplished.
Two, the present invention adopts the portable composite construction of three group, disassembles, the size that takes up room is little, is easy to carry after convenient each use.
Three, the aluminium nickel alloy in lightweight steel of integral light high rigidity of the present invention, has lightweight and advantage that is resistance to deformation.
Four, education activities chi provided by the present invention, has structure simple, easy to use, demonstrates the advantages such as size, angle are changeable simultaneously.
Teacher is when doing demonstration explanation to student, disposable continuous differentiation puts in place, more vividly understandable, makes student more have enjoyment in learning process.Multiple set square is not needed to demonstrate, do not need on blackboard, repeatedly draw not of uniform size, that angle is different triangle yet, to reduce measuring error and to improve efficiency of teaching.
Accompanying drawing explanation
Fig. 1 is single outside drawing of the second adjustable rule 20 after the present invention disassembles.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 is the outside drawing of the second slippage part 28 in Fig. 1.
Fig. 4 is the isometric front view of Fig. 3.
Fig. 5 is the rear isometric view of Fig. 3.
Fig. 6 is the B-B cut-open view in Fig. 3.
Fig. 7 is the outside drawing of Second Edge chi part 29 in Fig. 1.
Fig. 8 is the C-C cut-open view in Fig. 7.
The outside drawing of equilateral triangle is developed into after Fig. 9 the present invention combination.
The outside drawing of isosceles triangle is developed into after Figure 10 the present invention combination.
The outside drawing of right-angle triangle is developed into after Figure 11 the present invention combination.
The outside drawing of right angled isosceles triangle is developed into after Figure 12 the present invention combination.
Figure 13 is the second slippage part 28 in Fig. 9 to Figure 12 and the sectional view at position of matching between the 3rd limit chi part 39.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Figure 13: the adjusting triangle measurer of bearing slideway through hole corner aluminium niobium alloy isoplanar, comprise the first identical adjustable rule 10, second adjustable rule 20 of three physical dimensions and the 3rd adjustable rule 30, every adjustable rule is made up of, as improvement limit chi part and slippage part:
The lower surface of described slippage part is slippage lower plane 61, and the upper surface of described limit chi part is plane 16 on the chi of limit; Slippage lower plane 61 has and rotates through hole 108, limit chi plane 16 has limit chi stepped hole 109; Slippage lower plane 61 has on slippage lower plane 61 and have bearing bearing pin 74, bearing bearing pin 74 there is pivot pin bearing section 78, it is pivot pin step 76 between pivot pin bearing section 78 and described bearing bearing pin 74, described pivot pin bearing section 78 outer end is bearing section outer end 75, and the pivot pin bearing section 78 apart from bearing section outer end 75 being 1.3 to 1.5 millimeters of positions has snap ring groove 79; Described pivot pin bearing section 78 is fixed with rolling bearing 41 inner ring, rolling bearing 41 inner ring inboard againsts pivot pin step 76, snap ring groove 79 has axle split pin 11, and axle split pin 11 keeps off outside rolling bearing 41 inner ring;
Slippage lower plane 61 there is corner window 31, plane 16 has corner scale 13 with limit chi; Limit chi there is scale slope 15 inside plane 16, scale slope 15 is also engraved length scale 51;
Plane 16 there is bearing slideway 14 with limit chi, and bearing slideway 14 and limit chi have transition to slot 71 between plane 16, bottom bearing slideway 14, have blind slot space 17, and the described single-ended opening of bearing slideway 14; Described axle split pin 11 can be positioned among described blind slot space 17, has space between axle split pin 11 and blind slot space 17;
Pivot pin rivet 100 passes through successively and rotates through hole 108 and limit chi stepped hole 109, and pivot pin rivet 100 to be overlapped on the chi of limit in plane 16 by rotatable for slippage lower plane 61; Described slippage lower plane 61 is in sustained height with plane 16 on described limit chi;
First adjustable rule 10 is made up of the first limit chi part 19 and the first slippage part 18, and the second adjustable rule 20 is made up of Second Edge chi part 29 and the second slippage part 28, and the 3rd adjustable rule 30 is made up of the 3rd limit chi part 39 and the 3rd slippage part 38;
Bearing slideway 14 in the first described limit chi part 19 and between the skid bearing 41 in the 3rd slippage part 38 for being slidably matched, bearing slideway 14 in described Second Edge chi part 29 and between the skid bearing 41 in the first slippage part 18 for being slidably matched, the bearing slideway 14 in the 3rd described limit chi part 39 and between the skid bearing 41 in the second slippage part 28 for being slidably matched;
As further improvement: described the first adjustable rule 10, second adjustable rule 20, the 3rd adjustable rule 30 and the 4th adjustable rule 40 are all adopt the light-duty alloy steel of aluminium nickel on the whole, its material composition is: Nb(niobium): 17 ~ 19%, W (tungsten): 2.4 ~ 2.6%, Cu(copper): 2.4 ~ 2.6%, Mo(molybdenum): 1.4 ~ 1.6%, C(carbon): 1.1 ~ 1.3%, surplus is Al(aluminium) and inevitable impurity; The weight percent content of described impurity is: Sn(tin) be less than 0.05%, Si(silicon) be less than 0.20%, Mn(manganese) be less than 0.25%, S(sulphur) be less than 0.010%, P(phosphorus) be less than 0.015%; The Specifeca tion speeification of the described light-duty alloy steel material of aluminium nickel is: Rockwell's hardness HRC value is 41 ~ 43, and density is 3.4 to 3.6 grams every cubic centimetre.
As further improvement: the angle on described scale slope 15 and limit chi between plane 16 is 41 ~ 43 degree.
As further improvement: described length scale 51 texture depth is 0.27 to 0.29 millimeter.
As further improvement: there is stepped hole angle face 102 chi stepped hole 109 both sides, limit, the angle between the stepped hole angle face 102 of both sides is 52 to 54 degree.
In embodiment, the material composition of the described light-duty alloy steel of aluminium nickel is: Ni(nickel): 15%, W (tungsten): 2.5%, Cu(copper): 2.5%, Nb(niobium): 1.5%, C(carbon): 1.2%, surplus is Al(aluminium) and inevitable impurity; The weight percent content of described impurity is: Sn(tin) be 0.04%, Si(silicon) be 0.15%, Mn(manganese) be 0.23%, S(sulphur) be 0.008%, P(phosphorus) be 0.011%; The Specifeca tion speeification of the described light-duty alloy steel material of aluminium nickel is: Rockwell's hardness HRC value is 42, and density is 3.5 grams every cubic centimetre.
Angle on described scale slope 15 and limit chi between plane 16 is 42.
Described length scale 51 texture depth is 0.28, adopts electric pulse processing to generate.
There is stepped hole angle face 102 chi stepped hole 109 both sides, limit, and the angle between the stepped hole angle face 102 of both sides is 53.
When will carry out teaching differentiation to student, step is as follows:
One, in Fig. 9, equilateral triangle is developed into after the present invention will being combined, only the limit chi part in every adjustable rule need be done relative rotation with slippage part, by the corner window 31 on slippage lower plane 61, the corner scale 13 observed on the chi of limit in plane 16 have rotated 30 degree, line is formed between two skid bearings 41 in the slippage part of i.e. every adjustable rule self, line between these two skid bearings 41 and the angle between the bearing slideway of self 14 develop into 60 by 90 degree of rotations, angle between scale slope 15 in scale slope 15 then in the first limit chi part 19 and the scale slope 15 in Second Edge chi part 29 and the 3rd limit chi part 39 is all 60 degree, equilateral triangle is set up.
Two, Tu10Zhong, isosceles triangle is developed into after the present invention will being combined, only the limit chi part in wherein two adjustable rules need be done the identical anglec of rotation with slippage part, such as: the anglec of rotation the 3rd limit chi part 39 and the 3rd slippage part 38 being done counterclockwise 15 degree, Second Edge chi part 29 and the second slippage part 28 are also done counterclockwise the anglec of rotation of 15 degree, then the first limit chi part 19 and the first slippage part 18 necessarily do the anglec of rotation of 60 degree counterclockwise, and the equilateral triangle that interior angle is respectively 75 degree and 75 degree and 30 degree is set up.
Three, Tu11Zhong, right-angle triangle is developed into after the present invention will being combined, only the limit chi part in a wherein adjustable rule and slipping part need be divided and keep centering position non rotating, such as: Second Edge chi part 29 and the second slippage part 28 are kept centering position non rotating, when the 3rd limit chi part 39 and the 3rd slippage part 38 do the anglec of rotation of 60 degree counterclockwise, then the first limit chi part 19 and the first slippage part 18 necessarily do the anglec of rotation of 30 degree counterclockwise, and the right-angle triangle that interior angle is respectively 90 degree and 30 degree and 60 degree is set up.
Four, in Figure 12, isosceles right triangle is developed into after the present invention will being combined, only the limit chi part in a wherein adjustable rule and slipping part need be divided and keep centering position non rotating, limit chi part in other two adjustable rules and all equidirectional anglec of rotation doing 45 degree of slippage part, such as: Second Edge chi part 29 and the second slippage part 28 are kept centering position non rotating, 3rd limit chi part 39 and the 3rd slippage part 38 are done counterclockwise the anglec of rotation of 45 degree, Second Edge chi part 29 and the second slippage part 28 are also done counterclockwise the anglec of rotation of 45 degree, the isosceles right triangle that then interior angle is respectively 90 degree and 45 degree and 45 degree is set up.
The above-mentioned outstanding substantive distinguishing features of the present invention, has following significant progressive effect:
One, described slippage part is positioned at described chi part one end, limit and is overlapped on plane in the chi part of limit, and described slippage lower plane 61 is in sustained height with plane 16 on described limit chi, guarantee that the length scale 51 on three limits is all in same level, avoid error on line of sight; And the skid bearing 41 on every adjustable rule and between the bearing slideway 14 on adjacent activities chi for being slidably matched, particularly plane 16 there is limit chi corner scale 13 corresponding in position with the corner window 31 on slippage lower plane 61, convenient, intuitively between control slippage part and limit chi part the anglec of rotation can be accomplished.
Two, the present invention adopts the portable composite construction of three group, disassembles, the size that takes up room is little, is easy to carry after convenient each use.
Three, the aluminium nickel alloy in lightweight steel of integral light high rigidity of the present invention, has lightweight and advantage that is resistance to deformation.
Four, education activities chi provided by the present invention, has structure simple, easy to use, demonstrates the advantages such as size, angle are changeable simultaneously.
Teacher is when doing demonstration explanation to student, disposable continuous differentiation puts in place, more vividly understandable, makes student more have enjoyment in learning process.Multiple set square is not needed to demonstrate, do not need on blackboard, repeatedly draw not of uniform size, that angle is different triangle yet, to reduce measuring error and to improve efficiency of teaching.
Claims (4)
1. bearing slideway through hole corner aluminium niobium alloy isoplanar adjusting triangle measurer, comprise the first adjustable rule (10), the second adjustable rule (20) and the 3rd adjustable rule (30) that three physical dimensions are identical, every adjustable rule is made up of limit chi part and slippage part, it is characterized in that:
The lower surface of described slippage part is slippage lower plane (61), and the upper surface of described limit chi part is plane (16) on the chi of limit; Slippage lower plane (61) there is rotation through hole (108), plane (16) has limit chi stepped hole (109) with limit chi; Slippage lower plane (61) has on slippage lower plane (61) and have bearing bearing pin (74), bearing bearing pin (74) there is pivot pin bearing section (78), pivot pin step (76) between pivot pin bearing section (78) and described bearing bearing pin (74), described pivot pin bearing section (78) outer end is bearing section outer end (75), and the pivot pin bearing section (78) apart from bearing section outer end (75) being 1.3 to 1.5 millimeters of positions has snap ring groove (79); Described pivot pin bearing section (78) is fixed with rolling bearing (41) inner ring, rolling bearing (41) inner ring inboard againsts pivot pin step (76), snap ring groove (79) has axle split pin (11), axle split pin (11) keeps off outside rolling bearing (41) inner ring;
Slippage lower plane (61) there is corner window (31), plane (16) has corner scale (13) with limit chi; On the chi of limit, there is scale slope (15) plane (16) inner side, scale slope (15) also engraves length scale (51);
Plane (16) there is bearing slideway (14) with limit chi, and bearing slideway (14) and limit chi have transition to slot (71) between plane (16), blind slot space (17) is arranged at bearing slideway (14) bottom, and described bearing slideway (14) single-ended opening; Described axle split pin (11) can be positioned among described blind slot space (17), has space between axle split pin (11) and blind slot space (17);
Pivot pin rivet (100) passes through successively and rotates through hole (108) and limit chi stepped hole (109), and pivot pin rivet (100) to be overlapped on the chi of limit in plane (16) by rotatable for slippage lower plane (61); Described slippage lower plane (61) is in sustained height with plane (16) on described limit chi;
First adjustable rule (10) is made up of the first limit chi part (19) and the first slippage part (18), second adjustable rule (20) is made up of Second Edge chi part (29) and the second slippage part (28), and the 3rd adjustable rule (30) is made up of the 3rd limit chi part (39) and the 3rd slippage part (38);
Bearing slideway (14) on the first described limit chi part (19) and between the skid bearing (41) in the 3rd slippage part (38) for being slidably matched, for being slidably matched between skid bearing (41) in bearing slideway (14) in described Second Edge chi part (29) and the first slippage part (18), the bearing slideway (14) on the 3rd described limit chi part (39) and between the skid bearing (41) in the second slippage part (28) for being slidably matched;
Described the first adjustable rule (10), the second adjustable rule (20), the 3rd adjustable rule (30) and the 4th adjustable rule (40) are all adopt the light-duty alloy steel of aluminium nickel on the whole, its material composition is: Nb(niobium): 17 ~ 19%, W (tungsten): 2.4 ~ 2.6%, Cu(copper): 2.4 ~ 2.6%, Mo(molybdenum): 1.4 ~ 1.6%, C(carbon): 1.1 ~ 1.3%, surplus is Al(aluminium) and inevitable impurity; The weight percent content of described impurity is: Sn(tin) be less than 0.05%, Si(silicon) be less than 0.20%, Mn(manganese) be less than 0.25%, S(sulphur) be less than 0.010%, P(phosphorus) be less than 0.015%; The Specifeca tion speeification of the described light-duty alloy steel material of aluminium nickel is: Rockwell's hardness HRC value is 41 ~ 43, and density is 3.4 to 3.6 grams every cubic centimetre.
2. bearing slideway through hole corner aluminium niobium alloy isoplanar according to claim 1 adjusting triangle measurer, is characterized in that: the angle on described scale slope (15) and limit chi between plane (16) is 41 ~ 43 degree.
3. bearing slideway through hole corner aluminium niobium alloy isoplanar according to claim 1 adjusting triangle measurer, is characterized in that: described length scale (51) texture depth is 0.27 to 0.29 millimeter.
4. bearing slideway through hole corner aluminium niobium alloy isoplanar according to claim 1 adjusting triangle measurer, it is characterized in that: there is stepped hole angle face (102) chi stepped hole (109) both sides, limit, the angle between the stepped hole angle face (102) of both sides is 52 to 54 degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510509912.6A CN105157497A (en) | 2015-08-19 | 2015-08-19 | Bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510509912.6A CN105157497A (en) | 2015-08-19 | 2015-08-19 | Bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool |
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| CN105157497A true CN105157497A (en) | 2015-12-16 |
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| CN201510509912.6A Pending CN105157497A (en) | 2015-08-19 | 2015-08-19 | Bearing slide channel through hole rotation aluminum-niobium alloy co-planar adjustment triangle measuring tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091685A (en) * | 2015-08-19 | 2015-11-25 | 陈俞任 | Bearing slideway through hole rotation angle aluminium-niobium alloy co-plane adjusting triangular measuring tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2908190Y (en) * | 2006-04-13 | 2007-06-06 | 西安交通大学 | Triangulator |
| CN201970704U (en) * | 2011-01-31 | 2011-09-14 | 颜勇 | Adjustable set square |
| CN103688131A (en) * | 2011-01-18 | 2014-03-26 | R·K·斯瓦密 | A multipupurpose instrument for triangle solutions, measurements and geometrical applications called triometer |
| CN204423753U (en) * | 2014-12-26 | 2015-06-24 | 湖州市吴兴实验中学 | A kind of intersecting chord theorem inference teaching aid |
| CN105091685A (en) * | 2015-08-19 | 2015-11-25 | 陈俞任 | Bearing slideway through hole rotation angle aluminium-niobium alloy co-plane adjusting triangular measuring tool |
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2015
- 2015-08-19 CN CN201510509912.6A patent/CN105157497A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2908190Y (en) * | 2006-04-13 | 2007-06-06 | 西安交通大学 | Triangulator |
| CN103688131A (en) * | 2011-01-18 | 2014-03-26 | R·K·斯瓦密 | A multipupurpose instrument for triangle solutions, measurements and geometrical applications called triometer |
| CN201970704U (en) * | 2011-01-31 | 2011-09-14 | 颜勇 | Adjustable set square |
| CN204423753U (en) * | 2014-12-26 | 2015-06-24 | 湖州市吴兴实验中学 | A kind of intersecting chord theorem inference teaching aid |
| CN105091685A (en) * | 2015-08-19 | 2015-11-25 | 陈俞任 | Bearing slideway through hole rotation angle aluminium-niobium alloy co-plane adjusting triangular measuring tool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091685A (en) * | 2015-08-19 | 2015-11-25 | 陈俞任 | Bearing slideway through hole rotation angle aluminium-niobium alloy co-plane adjusting triangular measuring tool |
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Application publication date: 20151216 |
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