CA1289350C - Drafting instrument - Google Patents
Drafting instrumentInfo
- Publication number
- CA1289350C CA1289350C CA 543428 CA543428A CA1289350C CA 1289350 C CA1289350 C CA 1289350C CA 543428 CA543428 CA 543428 CA 543428 A CA543428 A CA 543428A CA 1289350 C CA1289350 C CA 1289350C
- Authority
- CA
- Canada
- Prior art keywords
- trimitre
- tool accessory
- arm
- protractor
- arms
- 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 OF THE DISCLOSURE
A protractor quadrant too] accessory is provided and consists of two arms attached pivotally together at one end, degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is slideably locked upon one arm so as to stabilize the tool accessory when measuring the stud angles and the like to be cut.
A protractor quadrant too] accessory is provided and consists of two arms attached pivotally together at one end, degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is slideably locked upon one arm so as to stabilize the tool accessory when measuring the stud angles and the like to be cut.
Description
121393~
BACK~RQUND QF THE INVENTION
The instant invention relates generally to protractor devices and more specifically it relates to a protractor quadrant tool accessory.
Numerous protractor devices have been provide in prior art that are adapted to measure angles. For example, U.S.
patents numbered 843,459; 932,907; 935,860; 840,439;
1,161,761; 1,161,961; 1,491,048; 1,524,703; and 1,823,931; all are illustrative of such prior art. While these units may be suitable for the particular purpose to which they address, they would not be as suitable for the purposes of the present invention as heretofore described.
SUMMARy OF THE INVENTIQ~
A primary object of the present invention is to provide a protractor quadrant tool accessory that will overcome the shortcomings of the prior art devices.
Another object is to provide a protractor quadrant tool accessory which can be practical for use by either machinests or carpenters for measuring angles on various articles.
An additional object is to provide a protractor quadrant tool accessory in which two straight arms are pivotally attached together at one end with a degree scale around a pivot hub of one of the arms so that the angle between the arms is known and a quick operating lock is incorporated to lock the arms at any fixed angle therebetween.
A further object is to provide a protractor quadrant tool accessory that is simple and easy to use.
A still further object is to provide a protractor quadrant tool accessory that is economical in cost to manufacture.
Further objects of the invention will appear as the description proceeds.
To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only, and that changes may be made in the specific construction illustrated and described within the scope of the appended claims.
12~g350 BRIEF DESC IPTION OF THE DR~WING FIGURES
The Eigures in the drawings are briefly described as follows:
Figure 1 is a pexspective view of one design of the invention being used as an isometric center finder.
Figure lA is a perspective view in phantom showing the tool making equal and opposite converse lines.
Figure 2 is a top view of the tool being used to measure the angle of stairway studs with stud guides thereon.
Figure 3 is a cross sectional view taken along line 3-3 in Figure 2 of one of the stud guides.
Figure 4 is a perspective view of a first modification showing a first adjustable trimitre slideably mounted to one arm.
Figure 5 is an enlarged exploded cross sectional view taken along line 5-5 in Figure 4 showing a locking adjustment bolt.
Figure 6 is a top view thereof being used to measure angles of studs.
12~3~350 Figure 7 is an enlarged top view with parts broken away showing the slide lock and degree calibrations in greater detail.
Figure 8 is a cross sectional view taken along line 8-8 in figure 7.
Figure 9 is a top view with parts broken away of a second modification showing a second adjustable trimitre slideably mounted to one arm.
Figure lO is a perspective view similar to Figure 4 showing a third adjustable trimitre slideably mounted to one arm of the tool.
Figure 11 is a top view thereof.
Figure 12 is a top view of the arm with the third adjustable trimitre thereon.
Figure 13 is an enlarged cross sectional view taken along line 13-13 in Figure 12.
Figure 14 is a cross sectional view taken along line 14-14 in Figure 13 showing the washer in greater detail.
~2~3935(~
DETAIhED DES$~P ~
Turning now descriptively to the drawings, in which similar elements throughout the several views, Figure 1 through 8 illustrates a protractor quadrant tool accessory 10 that consists of first and second similar flat arms 12 and 14.
Each of the arms have inner and outer parallel straight edges 16 and 18. The first arm 12 has a circular lower hub 20 at distal end and the second arm 14 has a similar upper hub 22 at distal end. The hubs 20 and 22 are concentric and have spaced parallel outer faces 24 and 26 forming coplanar extensions of the arms 12 and 14.
To interfitting, countersunk head screws 28 and 30 are for axially securing the hubs 20 and 22 together to form a pivotable joint. A plurality of degree calibrations 32 are marked out on the outer face 26 of the upper hub 22 with the 0 degree calibration in alignment with an arrow marker 34 on the first arm 12 when the two arms 12 and 14 are together as shown in Figure 7.
The first arm 12 has a longitudinal notch 36 contiguous with periphery of the upper hub 22. A wedge 38 is slideably mounted in the notch 36 and has a bevelled upper surface 40.
The upper hub 22, as best seen in Figure 8, has a frustroconical inner surface 42 complementary and opposite to the bevelled surface 40 to abut the frustroconical surface 42 of the upper hub 22 thereby ja~ming the hubs 20 and 22 frictionally against the wedge 38. This prevents further relative rotation so that the protractor quadrant tool , ~289350 accessory can be used by a machinest and carpenter for measuring angles various articles.
The protractor tool accessory 10 further comprises a plurality of stud guides 44. Each stud guide as best seen in Figure 3 includes a circular housing 46 that has a slot 48 within one side 50 so as to fit upon one of the outer parallel straight edges 18. A securement bolt 52 is threaded into the housing 46 to extend transversely into the slot 48 for securing the housing 46 on one of the outer parallel straight edges 18. This stabilizes the tool accessory 10 when measuring the stairway stud angles as shown in Figure 2. It can also be used as an isometric center finder in Figure 1 and for making equal and opposite converse lines 54 and 56 upon a stud 58 shown in phantom in Figure lA.
As shown in Figures 4, 5 and 6 the second arm 14 can have an elongated longitudinal groove 60 therein with two transverse slots 62 and 64, each in opposite side walls 66 and 68 of the groove. An adjustable trimitre 70 has a 45 guage 72 at one end and a 90 guage 74 at other end. The trimitre 70 is slideable within the groove 60.
A threaded washer 76 slides within the two transverse slots 62 and 64. A locking adjustament bolt 78 is threaded into the threaded washer 76 to engage with bottom 80 of the groove 60 along any place thereof for locking the adjustable trimitre 70 in position. This stabili~es the tool accessory 10 when measuring stud angles and the like as shown in Figure 6.
12893~;0 Figure 9 shows the second arm 14 having a elongated longitudinal groove 60a therein with another type of adjustable trimitre 70A provided with a 45 gauge 72a at one end and a 90~ guage 74a at other end. The trimitre 70a is slideable within the groove 60a. A pair of loc~ing adjustable trimitre 70a in position. This stabilizes the tool accessory 10 when measuring stud angles and the like to be cut.
Figures 10 to 14 show still another type of adjustable trimitre 70b having an L-shaped 90 configuration. The trimitre 70b is slideable within the groove 60a in the second arm 14. A pair of threaded washers 76b are provided that have flat sides to slide within the groove 60a (see Figure 14). A
pair of adjustment bolts 78b are spaced apart, placed through the trimitre 70b and threaded into the threaded washers 76b.
The trimitre 70b can slide along the groove 60a in the second arm 14 to any position when measuring angles on various articles to be cut. The second arm 14 can be replaced with a flat rule (not shown) whereby the flat rule can pivot around corner bolt 78b when other bolt is removed as shown in Figure 12 to measure various angles therefrom.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing from the spirit of the invention.
BACK~RQUND QF THE INVENTION
The instant invention relates generally to protractor devices and more specifically it relates to a protractor quadrant tool accessory.
Numerous protractor devices have been provide in prior art that are adapted to measure angles. For example, U.S.
patents numbered 843,459; 932,907; 935,860; 840,439;
1,161,761; 1,161,961; 1,491,048; 1,524,703; and 1,823,931; all are illustrative of such prior art. While these units may be suitable for the particular purpose to which they address, they would not be as suitable for the purposes of the present invention as heretofore described.
SUMMARy OF THE INVENTIQ~
A primary object of the present invention is to provide a protractor quadrant tool accessory that will overcome the shortcomings of the prior art devices.
Another object is to provide a protractor quadrant tool accessory which can be practical for use by either machinests or carpenters for measuring angles on various articles.
An additional object is to provide a protractor quadrant tool accessory in which two straight arms are pivotally attached together at one end with a degree scale around a pivot hub of one of the arms so that the angle between the arms is known and a quick operating lock is incorporated to lock the arms at any fixed angle therebetween.
A further object is to provide a protractor quadrant tool accessory that is simple and easy to use.
A still further object is to provide a protractor quadrant tool accessory that is economical in cost to manufacture.
Further objects of the invention will appear as the description proceeds.
To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only, and that changes may be made in the specific construction illustrated and described within the scope of the appended claims.
12~g350 BRIEF DESC IPTION OF THE DR~WING FIGURES
The Eigures in the drawings are briefly described as follows:
Figure 1 is a pexspective view of one design of the invention being used as an isometric center finder.
Figure lA is a perspective view in phantom showing the tool making equal and opposite converse lines.
Figure 2 is a top view of the tool being used to measure the angle of stairway studs with stud guides thereon.
Figure 3 is a cross sectional view taken along line 3-3 in Figure 2 of one of the stud guides.
Figure 4 is a perspective view of a first modification showing a first adjustable trimitre slideably mounted to one arm.
Figure 5 is an enlarged exploded cross sectional view taken along line 5-5 in Figure 4 showing a locking adjustment bolt.
Figure 6 is a top view thereof being used to measure angles of studs.
12~3~350 Figure 7 is an enlarged top view with parts broken away showing the slide lock and degree calibrations in greater detail.
Figure 8 is a cross sectional view taken along line 8-8 in figure 7.
Figure 9 is a top view with parts broken away of a second modification showing a second adjustable trimitre slideably mounted to one arm.
Figure lO is a perspective view similar to Figure 4 showing a third adjustable trimitre slideably mounted to one arm of the tool.
Figure 11 is a top view thereof.
Figure 12 is a top view of the arm with the third adjustable trimitre thereon.
Figure 13 is an enlarged cross sectional view taken along line 13-13 in Figure 12.
Figure 14 is a cross sectional view taken along line 14-14 in Figure 13 showing the washer in greater detail.
~2~3935(~
DETAIhED DES$~P ~
Turning now descriptively to the drawings, in which similar elements throughout the several views, Figure 1 through 8 illustrates a protractor quadrant tool accessory 10 that consists of first and second similar flat arms 12 and 14.
Each of the arms have inner and outer parallel straight edges 16 and 18. The first arm 12 has a circular lower hub 20 at distal end and the second arm 14 has a similar upper hub 22 at distal end. The hubs 20 and 22 are concentric and have spaced parallel outer faces 24 and 26 forming coplanar extensions of the arms 12 and 14.
To interfitting, countersunk head screws 28 and 30 are for axially securing the hubs 20 and 22 together to form a pivotable joint. A plurality of degree calibrations 32 are marked out on the outer face 26 of the upper hub 22 with the 0 degree calibration in alignment with an arrow marker 34 on the first arm 12 when the two arms 12 and 14 are together as shown in Figure 7.
The first arm 12 has a longitudinal notch 36 contiguous with periphery of the upper hub 22. A wedge 38 is slideably mounted in the notch 36 and has a bevelled upper surface 40.
The upper hub 22, as best seen in Figure 8, has a frustroconical inner surface 42 complementary and opposite to the bevelled surface 40 to abut the frustroconical surface 42 of the upper hub 22 thereby ja~ming the hubs 20 and 22 frictionally against the wedge 38. This prevents further relative rotation so that the protractor quadrant tool , ~289350 accessory can be used by a machinest and carpenter for measuring angles various articles.
The protractor tool accessory 10 further comprises a plurality of stud guides 44. Each stud guide as best seen in Figure 3 includes a circular housing 46 that has a slot 48 within one side 50 so as to fit upon one of the outer parallel straight edges 18. A securement bolt 52 is threaded into the housing 46 to extend transversely into the slot 48 for securing the housing 46 on one of the outer parallel straight edges 18. This stabilizes the tool accessory 10 when measuring the stairway stud angles as shown in Figure 2. It can also be used as an isometric center finder in Figure 1 and for making equal and opposite converse lines 54 and 56 upon a stud 58 shown in phantom in Figure lA.
As shown in Figures 4, 5 and 6 the second arm 14 can have an elongated longitudinal groove 60 therein with two transverse slots 62 and 64, each in opposite side walls 66 and 68 of the groove. An adjustable trimitre 70 has a 45 guage 72 at one end and a 90 guage 74 at other end. The trimitre 70 is slideable within the groove 60.
A threaded washer 76 slides within the two transverse slots 62 and 64. A locking adjustament bolt 78 is threaded into the threaded washer 76 to engage with bottom 80 of the groove 60 along any place thereof for locking the adjustable trimitre 70 in position. This stabili~es the tool accessory 10 when measuring stud angles and the like as shown in Figure 6.
12893~;0 Figure 9 shows the second arm 14 having a elongated longitudinal groove 60a therein with another type of adjustable trimitre 70A provided with a 45 gauge 72a at one end and a 90~ guage 74a at other end. The trimitre 70a is slideable within the groove 60a. A pair of loc~ing adjustable trimitre 70a in position. This stabilizes the tool accessory 10 when measuring stud angles and the like to be cut.
Figures 10 to 14 show still another type of adjustable trimitre 70b having an L-shaped 90 configuration. The trimitre 70b is slideable within the groove 60a in the second arm 14. A pair of threaded washers 76b are provided that have flat sides to slide within the groove 60a (see Figure 14). A
pair of adjustment bolts 78b are spaced apart, placed through the trimitre 70b and threaded into the threaded washers 76b.
The trimitre 70b can slide along the groove 60a in the second arm 14 to any position when measuring angles on various articles to be cut. The second arm 14 can be replaced with a flat rule (not shown) whereby the flat rule can pivot around corner bolt 78b when other bolt is removed as shown in Figure 12 to measure various angles therefrom.
While certain novel features of this invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing from the spirit of the invention.
Claims (5)
1. A protractor quadrant tool accessory which comprises:
a) first and second similar flat arms, each of said arms having inner and outer parallel straight edges, said arm having a similar upper hub at distal end, wherein said hubs are concentric and having spaced parallel outer faces forming coplanar extensions of said arms;
b) two interfitting, countersunk head screws axially securing said hubs together to form a pivotable joint;
c) a plurality of degree calibrations marked out on said outer face of said upper hub with the 0 degree calibration in alignment with an arrow maker on said first arm when said two arms are together;
d) said first arm having a longitudinal notch contiguous with periphery of said upper hub.
e) a wedge slideably mounted in said notch having a bevelled upper surface; and f) said upper hub having a frustroconical inner surface complementary and opposite to said bevelled surface whereby movement of said wedge radially towards said upper hub causes said bevelled surface to abut said frustroconical surface of said upper hub thereby jamming said hubs frictionally against said wedge to prevent further relative rotation so that said protractor quadrant tool accessory can be used by a machinest and carpenter for measuring angles on various articles.
a) first and second similar flat arms, each of said arms having inner and outer parallel straight edges, said arm having a similar upper hub at distal end, wherein said hubs are concentric and having spaced parallel outer faces forming coplanar extensions of said arms;
b) two interfitting, countersunk head screws axially securing said hubs together to form a pivotable joint;
c) a plurality of degree calibrations marked out on said outer face of said upper hub with the 0 degree calibration in alignment with an arrow maker on said first arm when said two arms are together;
d) said first arm having a longitudinal notch contiguous with periphery of said upper hub.
e) a wedge slideably mounted in said notch having a bevelled upper surface; and f) said upper hub having a frustroconical inner surface complementary and opposite to said bevelled surface whereby movement of said wedge radially towards said upper hub causes said bevelled surface to abut said frustroconical surface of said upper hub thereby jamming said hubs frictionally against said wedge to prevent further relative rotation so that said protractor quadrant tool accessory can be used by a machinest and carpenter for measuring angles on various articles.
2. A protractor quadrant tool accessory as recited in Claim 1, further comprising a plurality of studs guide, each of which includes:
a) a circular housing having a slot within one side so as to fit upon one of said outer parallel straight edges; and b) a securement bolt threaded into said housing to extend transversely into said slot for securing said housing on one of said outer parallel straight edges so as to stabilize said tool accessory when measuring said stairway stud angles and the like, uses as an isometric center finder and making equal and opposite converse lines upon a stud.
a) a circular housing having a slot within one side so as to fit upon one of said outer parallel straight edges; and b) a securement bolt threaded into said housing to extend transversely into said slot for securing said housing on one of said outer parallel straight edges so as to stabilize said tool accessory when measuring said stairway stud angles and the like, uses as an isometric center finder and making equal and opposite converse lines upon a stud.
3. A protractor quadrant tool accessory as recited in Claim 1, further comprising:
a) said second arm having an elongated longitudinal groove therein with two transverse slots, each in opposite side walls of said groove;
c) a threaded washer to slide within said two transverse slots; and d) a locking adjustment bolt threaded into said threaded washer to engage with bottom of said groove along any place thereof for locking said adjustable trimitre in position so as to stabilize said tool accessory when measuring stud angles and the like.
a) said second arm having an elongated longitudinal groove therein with two transverse slots, each in opposite side walls of said groove;
c) a threaded washer to slide within said two transverse slots; and d) a locking adjustment bolt threaded into said threaded washer to engage with bottom of said groove along any place thereof for locking said adjustable trimitre in position so as to stabilize said tool accessory when measuring stud angles and the like.
4. A protractor quadrant tool accessory as recited in Claim 1, further comprising:
a) said second arm having an elongated longitudinal groove therein;
b) an adjustable trimitre having a 45° guage at one end and a 90° gauge at other end, said trimitre slideable within said groove; and c) a pair of locking adjustment bolts spaced apart and threaded into said trimitre to engage with said second arm along any place thereof for locking said adjustable trimitre in position so as stabilize said tool accessory when measuring stud angles and the like to be cut.
a) said second arm having an elongated longitudinal groove therein;
b) an adjustable trimitre having a 45° guage at one end and a 90° gauge at other end, said trimitre slideable within said groove; and c) a pair of locking adjustment bolts spaced apart and threaded into said trimitre to engage with said second arm along any place thereof for locking said adjustable trimitre in position so as stabilize said tool accessory when measuring stud angles and the like to be cut.
5. A protractor quadrant tool accessory as recited in Claim 1, further comprising:
a) said second arm having an elongated longitudinal groove therein;
b) an adjustable trimitre having an L-shaped 90°
configuration, said trimitre slideable within said groove;
c) a pair of threaded washers having flat sides to slide within said groove; and d) a pair of adjustment bolts spaced apart, placed through said trimitre and threaded into said threaded washers so that said trimitre can slide along said groove in said second arm to any position when measuring angles on various articles to be cut.
a) said second arm having an elongated longitudinal groove therein;
b) an adjustable trimitre having an L-shaped 90°
configuration, said trimitre slideable within said groove;
c) a pair of threaded washers having flat sides to slide within said groove; and d) a pair of adjustment bolts spaced apart, placed through said trimitre and threaded into said threaded washers so that said trimitre can slide along said groove in said second arm to any position when measuring angles on various articles to be cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 543428 CA1289350C (en) | 1987-07-30 | 1987-07-30 | Drafting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 543428 CA1289350C (en) | 1987-07-30 | 1987-07-30 | Drafting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1289350C true CA1289350C (en) | 1991-09-24 |
Family
ID=4136183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 543428 Expired CA1289350C (en) | 1987-07-30 | 1987-07-30 | Drafting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1289350C (en) |
-
1987
- 1987-07-30 CA CA 543428 patent/CA1289350C/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |