GB2379514A - An adjustable squaring tool - Google Patents

An adjustable squaring tool Download PDF

Info

Publication number
GB2379514A
GB2379514A GB0121994A GB0121994A GB2379514A GB 2379514 A GB2379514 A GB 2379514A GB 0121994 A GB0121994 A GB 0121994A GB 0121994 A GB0121994 A GB 0121994A GB 2379514 A GB2379514 A GB 2379514A
Authority
GB
United Kingdom
Prior art keywords
main member
section
pivot arm
cylinder
apertures
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.)
Granted
Application number
GB0121994A
Other versions
GB0121994D0 (en
GB2379514B (en
Inventor
Albert Frank Ellam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0121994A priority Critical patent/GB2379514B/en
Publication of GB0121994D0 publication Critical patent/GB0121994D0/en
Publication of GB2379514A publication Critical patent/GB2379514A/en
Application granted granted Critical
Publication of GB2379514B publication Critical patent/GB2379514B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

An adjustable squaring tool 10 for measuring and marking angles includes a pivot arm 21 pivotally coupled between first and second sections 25,26 of a main member 14, the pivot arm 21 including a cylinder (22 in Fig.6) coupled to an end thereof. The pivot arm 21 has a graduated arcuate measurement arm 16 extending from the pivot arm 21 through a channel 28 in the main member 14. The cylinder 22 has a plurality of radially spaced apertures 24 corresponding to the gradations of the measurement arm 16. The main member 14 includes a drum 32 which passes through the cylinder 22. The drum 32 includes at least one spring-biassed bearing 42 positioned for engaging the apertures 24 in the cylinder 22 as the cylinder 22 rotates around the drum 32. A locking assembly (38 in Fig.3) is provided for clamping the pivot arm 21 to the main member 14. In a preferred embodiment, the apertures 24 are spaced for adjusting the tool in one degree increments within a range of 10 to 90 degrees.

Description

<Desc/Clms Page number 1>
SQUARING TOOL BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to squaring tools and more particularly pertains to an adjustable squaring tool for measuring and marking various angles, e. g. in one degree increments, preferably between 10 degrees and 90 degrees.
Description of the Prior Art The use of squaring tools is known in the prior art. Examples include U. S. Patent No.
4,312, 133; U. S. Patent No. 4,697, 351; U. S. Patent No. 4,525, 933; U. S. Patent No.
4,685, 366; U. S. Patent No. 5,539, 991; and U. S. Patent No. Des. 262,195. These known devices have limitations and do not lend themselves readily to a user adjusting them easily when measuring and marking a variety of angles.
SUMMARY OF THE INVENTION It is therefore considered desirable to provide an adjustable squaring tool that can overcome and/or minimise the above-mentioned and/or other disadvantages of the constructions proposed in the prior art.
According to one aspect of this invention there is provided an elongate pivot arm; a cylinder member coupled to an end of the pivot arm; a main member having a first and second sections overlying one another with the pivot arm coupled pivotally between them, a graduated arcuate measurement arm extending from the pivot arm and extending through a channel in the main member; a drum member within the cylinder member; detent means operative between the cylinder member and the drum member to locate one of said members at a selected one of range of angles relative to the other of said members
<Desc/Clms Page number 2>
to define a correspondingly selected angle between the pivot arm and the main member; and means for clamping the pivot arm between the first and second sections of the main member to prevent relative movement of the pivot arm and main member away from the said selected angle between them.
Preferably one of said pivot arm and said main member has a leading edge extending in a line through the axis of the cylinder member.
Advantageously the detent means allows for the squaring tool to be utilized for measuring and marking angles in one degree increments-preferably between 10 degrees and 90 degrees.
In one particular embodiment the adjustable squaring tool generally comprises a pivot arm pivotally coupled between first and second sections of a main member, the pivot arm having a graduated arcuate measurement arm extending from the pivot arm through a channel in the main member, a cylinder being coupled to an end of the pivot arm. The main member includes a drum passing through the cylinder which has a plurality of radially spaced apertures corresponding to the gradations of the measurement arm. The drum includes at least one spring biased bearing positioned for engaging said apertures in the cylinder as the cylinder rotates around the drum. A locking assembly is provided for clamping the pivot arm between the first and second sections of the main member to lock the pivot arm relative to the main member.
According to another aspect of this invention there is provided an adjustable squaring tool comprising: a pivot arm assembly having an elongated pivot arm and a cylinder coupled to an end of the pivot arm, the cylinder having a plurality of apertures radially spaced in five degree increments; a main member having a first section and a second section, the pivot arm being pivotally coupled between said first section and second section of the main member;
<Desc/Clms Page number 3>
a graduated arcuate measurement arm extending from the pivot arm, the measurement arm extending through a channel in the main member; a drum assembly having a drum passing through the cylinder of the pivot arm; and a locking assembly for clamping the pivot arm between the first and second sections of the main member to prevent movement of the pivot arm relative to the main member; wherein: said cylinder has a plurality of apertures arranged into three rows, the apertures in each row being radially spaced with respect to each other; said drum assembly has three spring biased bearings extending outwardly from the drum and positioned to engage a selectable one of said apertures in an associated one of three rows of apertures and corresponding to a selectable angle between said pivot arm and said main member. said first section of said main member has a plurality of first section connection holes; said second section of said main member has a plurality of second section connection holes, said second section connection holes being positioned to align with said first section connection holes to form a plurality of main member holes extending through the main member; a plurality of connecting members are provided, each being insertable through an associated one of said main member's connection holes for coupling said first section to said second section such that said measurement arm is permitted to rotate relative to said main member; said main member has a pair of locking apertures positioned adjacent an interior drum chamber of said main member; said drum has a pair of threaded extensions extending from opposite ends of said drum, each of said threaded extensions passing through an associated one of said locking apertures; said locking assembly has a locking nut couplable to one of said threaded extensions and a thumbscrew couplable to the other of said threaded extensions, said
<Desc/Clms Page number 4>
thumb screw being tightenable to compress said main member between said thumb screw and said locking nut thereby to hold frictionally said measurement arm in a static position relative to said main member; said pivot arm has a leading edge, said leading edge being aligned with a centre of said cylinder. said first and second sections of said main member are provided with complimentary measurement arm channels that are positioned adjacent to each other when said first section is coupled to said second section to form said channel through said main member; a first face of said measurement arm has a first plurality of angle indicators radially spaced in one degree increments around the cylinder axis ; said first section has a window portion positioned in alignment with said channel in said main member whereby said first plurality of angle indicators are visible through said window portion in said first section; said window portion of said first section is provided with alignment indicia extending along a longitudinal axis of said main member and through the axis of said cylinder, whereby said angle indicator visible through said window portion and aligned with said alignment indicia indicates an angle between said leading edge of said pivot arm and said longitudinal axis of said main member; said window portion of said first section magnifies said angle indicators for facilitating reading of a measurement of said squaring tool; and wherein said measurement arm, on a second, opposite, face of said measurement arm, has a second plurality of angle indicators radially spaced apart in one degree increments around the cylinder axis; said second section having a window portion positioned in alignment with said channel in said main member whereby said second plurality of angle indicators are visible through said window portion in said second section.
<Desc/Clms Page number 5>
BRIEF DESCRIPTION OF THE DRAWINGS By way of example, one embodiment of the present invention will now be described with reference to the annexed drawings wherein: Figure 1 is a schematic front view of an adjustable squaring tool according to the present invention.
Figure 2 is a schematic side view of the tool of Fig 1.
Figure 3 is a schematic cross-sectional view of the tool of Fig 1 taken along line 3-3 of Figure 1.
Figure 4 is a schematic cross-sectional view of the tool of Fig 1 taken along line 4-4 of Figure 2.
Figure 5 is a schematic exploded perspective view of the tool of Fig 1..
Figure 6 is a schematic rear view of the pivot arm and measurement arm of the tool of Fig. 1 DESCRIPTION OF THE PREFERRED EMBODIMENT The adjustable squaring tool 10 illustrated in Figures 1 to 6 generally comprises a pivot arm assembly 12, a main member 14 and an arcuate measurement arm 16. The pivot arm assembly includes an elongated pivot arm 21 and a cylinder 22 coupled to an end 23 of the pivot arm. The cylinder includes a plurality of radially spaced apertures 24 spaced in five degree increments.
The main member includes a first section 25 and a second section 26. The pivot arm is pivotally coupled between the first section and the second section of the main member.
The measurement arm is graduated and extends from the pivot arm. The measurement arm extends through a channel 28 in the main member.
A drum assembly 30 is positioned within the main member for engaging and holding the cylinder of the pivot arm in place. The drum assembly includes a drum 32 that passes through the cylinder of the pivot arm. The drum assembly also includes at least one spring biased bearing 34 that extends outwardly from an outer surface of the drum. In an
<Desc/Clms Page number 6>
embodiment, bearings may protrude from opposite sides of the drum and include a single spring member 35 for two associated bearings. Each bearing is positioned for engaging a selectable one of the apertures in the cylinder corresponding to a selectable angle between the pivot arm and the main member.
In this particular embodiment, the apertures in the cylinder are arranged into a plurality of aperture rows 39. The apertures in each row are radially spaced with respect to each other. The drum assembly includes a plurality of the spring biased bearings and each bearing is positioned to engage a selectable one of the apertures in an associated one of the rows of apertures.
In the illustrated embodiment, the cylinder includes three rows of apertures and the drum assembly includes three spring loaded bearing member assemblies 42, each having two bearings.
A locking assembly 38 is provided for clamping the pivot arm between the first and second sections of the main member to prevent movement of the pivot arm relative to the main member during use.
The first section of the main member includes a plurality of first section connection holes 44 and the second section of the main member includes a plurality of second section connection holes 46. The second section connection holes are positioned to align with the first section connection holes to form a plurality of main member holes 47 that extend through the main member. A plurality of connecting members 48 are provided. Each of the connecting members is insertable through an associated one of the main member holes for coupling the first section to the second section. The connection is tight enough to hold the first and second sections together while permitting the measurement arm to rotate relative to the main member. In this particular embodiment, two pins 52 are provided proximate the end of the main member opposite the cylinder and a third pin 53 is provided proximate the cylinder.
<Desc/Clms Page number 7>
The first and second sections of the main member each include complimentary measurement arm channels 55. The measurement arm channels are positioned adjacent to each other when the first section is coupled to the second section to form the channel 28 through the main member.
The measurement arm includes a first plurality of angle indicators 56 on a first face 59 of the measurement arm. The first section includes a window portion 57 positioned in alignment with the channel in the main member. In use, the angle indicators 56 are visible through the window portion in the first section.
In this preferred embodiment, the measurement arm also includes a second plurality of angle indicators 58 on a second face 54 of the measurement arm. The second section then includes a window portion 60 positioned in alignment with the channel in the main member such that the angle indicators 58 are visible through the window portion 60. The first angle indicators are radially spaced corresponding to one degree increments around the axis of the cylinder. In this embodiment, the second angle indicators are also radially spaced corresponding to one degree increments around the center of the cylinder. In this illustrated embodiment, the window portions 57 and 60 may be structured to magnify the angle indicators 56 and 58.
The main member includes a pair of locking apertures 63 and 64, each extending through a respective one of the first and second sections. The locking apertures are positioned adjacent an interior drum chamber 65 of the main member.
The drum includes a pair of threaded extensions 66 and 68 that extend from opposite ends of the drum. Each of the threaded extensions passes through an associated one of the locking apertures.
The locking assembly includes a locking nut 70 couplable to one of the threaded extensions and a thumbscrew 71 couplable to another one of the threaded extensions. The
<Desc/Clms Page number 8>
thumb screw is tightenable to compress the main member between the thumb screw and the locking nut whereby the measurement arm is frictionally held in a static position relative to the main member when the thumb screw is tightened.
The pivot arm includes a leading edge 27 aligned with a center of the cylinder. The window portion of the first section includes alignment indicia 29 that extends along a longitudinal axis of the main member. The longitudinal axis of the main member also extends through a center of the cylinder such that the individual angle indicator that is visible through the window portion and aligned with the alignment indicia indicates an angle between the leading edge of the pivot arm and the longitudinal axis of the main
member. The main member includes a planar first face 31 aligned parallel to the FA Aiat %, %,-. . L 11 % A longitudinal axis. In accordance with geometric principles, the angle between the longitudinal axis and the leading edge is equivalent to an angle between the leading edge and the first face of the main member.
The foregoing is to be considered only as illustrative of the principles of the invention.
Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the following Claims.

Claims (16)

  1. CLAIMS 1. An adjustable squaring tool, comprising: an elongate pivot arm; a cylinder member coupled to an end of the pivot arm; a main member having a first and second sections overlying one another with the pivot arm coupled pivotally between them, a graduated arcuate measurement arm extending from the pivot arm and extending through a channel in the main member; a drum member within the cylinder member; detent means operative between the cylinder member and the drum member to locate one of said members at a selected one of range of angles relative to the other of said members to define a correspondingly selected angle between the pivot arm and the main member; and means for clamping the pivot arm between the first and second sections of the main member to prevent relative movement of the pivot arm and main member away from the said selected angle between them.
  2. 2. An adjustable squaring tool according to Claim 1, wherein the detent means comprises at least one spring biased bearing extending outwardly of the member drum and positioned such as to be engageable in a selected one of a plurality of radially spaced recesses or apertures in the cylinder member.
  3. 3. An adjustable squaring tool according to Claim 2, wherein the apertures in said cylinder member are arranged in a plurality of rows, the apertures in each row being radially spaced with respect to each other; and wherein said drum member has a plurality of said spring biased bearings, each bearing being positioned to engage a selectable one of said apertures in an associated one of said rows of apertures.
    <Desc/Clms Page number 10>
  4. 4. An adjustable squaring tool according to Claim 3, wherein said cylinder member has three rows of apertures and said drum member has three spring loaded bearing members.
  5. 5. An adjustable squaring tool according to any preceding claim wherein the first section of said main member has a plurality of first section connection holes; the second section of said main member has a plurality of second section connection holes, said second section connection holes being positioned to align with said first section connection holes to form a plurality of main member holes extending through the main member; and wherein a plurality of connecting members are provided each insertable through an associated one of said main member's connection holes for coupling said first section to said second section such that said measurement arm is permitted to move arcuately relative to said main member.
  6. 6. An adjustable squaring tool according to any preceding claim, wherein the first and second sections of said main member are each provided with complimentary measurement arm channels that are positioned adjacent to each other when said first section is coupled to said second section to form said channel through said main member through which the measurement arm extends.
  7. 7. An adjustable squaring tool according to any preceding claim, wherein said measurement arm, has a first plurality of angle indicators on a first face thereof, a said first section has a window portion positioned in alignment with said channel in said main member whereby said first plurality of angle indicators are visible through said window portion in said first section.
  8. 8. An adjustable squaring tool according to Claim 7, wherein said first angle indicators are radially spaced apart in one degree increments around the centre of said cylinder.
    <Desc/Clms Page number 11>
  9. 9. An adjustable squaring tool according to Claim 7 or Claim 8, wherein said measurement arm has a second plurality of angle indicators on a second face of said measurement arm, said second face being opposite said first face; and wherein said second section has a window portion positioned in alignment with said channel in said main member whereby said second plurality of angle indicators are visible through said window portion in said second section.
  10. 10. An adjustable squaring tool according to Claim 9, wherein said second angle indicators are radially spaced apart in one degree increments around the centre of said cylinder.
  11. 11. An adjustable squaring tool according to any preceding claim, wherein one of said pivot arm and said main member has a leading edge extending through the centre of the cylinder member.
  12. 12. An adjustable squaring tool according to any one of Claims 7 to 10, wherein said pivot arm has a leading edge aligned with the centre of the cylinder member, and wherein said window portion of said first section has an alignment index extending longitudinally of said main member and through the centre of said cylinder, whereby said angle indicator visible through said window portion and aligned with said alignment indicia indicates an angle between said leading edge of said pivot arm and said longitudinal axis of said main member.
  13. 13. An adjustable squaring tool according to any of Claims 7 to 11 wherein said window portion of said first section magnifies said angle indicators to facilitate reading of a measurement of said squaring tool.
  14. 14. An adjustable squaring tool according to any preceding Claim, wherein said main member is provided with a pair of locking apertures positioned adjacent opposite ends of
    <Desc/Clms Page number 12>
    the drum member, and the latter has a pair of threaded extensions extending from opposite ends thereof and through an associated one of said locking apertures; and wherein the said clamping means comprises a locking nut couplable to one of said threaded extensions and a thumbscrew couplable to the other of said threaded extensions, said thumb screw being tightenable to compress said main member between said thumb screw and said locking nut and thereby hold said measurement arm frictionally in a static position relative to said main member.
  15. 15. An adjustable squaring tool, comprising: a pivot arm assembly having an elongated pivot arm and a cylinder coupled to an end of the pivot arm, the cylinder having a plurality of apertures radially spaced in five degree increments; a main member having a first section and a second section, the pivot arm being pivotally coupled between said first section and second section of the main member;
    a graduated arcuate measurement arm extending from the pivot arm, the measurement arm extending through a channel in the main member ; a drum assembly having a drum passing through the cylinder of the pivot arm ; and a locking assembly for clamping the pivot arm between the first and second sections of the main member to prevent movement of the pivot arm relative to the main member; wherein: said cylinder has a plurality of apertures arranged into three rows, the apertures in each row being radially spaced with respect to each other; said drum assembly has three spring biased bearings extending outwardly from the drum and positioned to engage a selectable one of said apertures in an associated one of three rows of apertures and corresponding to a selectable angle between said pivot arm and said main member. said first section of said main member has a plurality of first section connection holes;
    <Desc/Clms Page number 13>
    said second section of said main member has a plurality of second section connection holes, said second section connection holes being positioned to align with said first section connection holes to form a plurality of main member holes extending through the main member; a plurality of connecting members are provided, each being insertable through an associated one of said main member's connection holes for coupling said first section to said second section such that said measurement arm is permitted to rotate relative to said main member; said main member has a pair of locking apertures positioned adjacent an interior drum chamber of said main member; said drum has a pair of threaded extensions extending from opposite ends of said drum, each of said threaded extensions passing through an associated one of said locking apertures; said locking assembly has a locking nut couplable to one of said threaded extensions and a thumbscrew couplable to the other of said threaded extensions, said thumb screw being tightenable to compress said main member between said thumb screw and said locking nut thereby to hold frictionally said measurement arm in a static position relative to said main member; said pivot arm has a leading edge, said leading edge being aligned with a centre of said cylinder. said first and second sections of said main member are provided with complimentary measurement arm channels that are positioned adjacent to each other when said first section is coupled to said second section to form said channel through said main member; a first face of said measurement arm has a first plurality of angle indicators radially spaced in one degree increments around the cylinder axis; said first section has a window portion positioned in alignment with said channel in said main member whereby said first plurality of angle indicators are visible through said window portion in said first section;
    <Desc/Clms Page number 14>
    said window portion of said first section is provided with alignment indicia extending along a longitudinal axis of said main member and through the axis of said cylinder, whereby said angle indicator visible through said window portion and aligned with said alignment indicia indicates an angle between said leading edge of said pivot arm and said longitudinal axis of said main member; said window portion of said first section magnifies said angle indicators for facilitating reading of a measurement of said squaring tool; and wherein said measurement arm, on a second, opposite, face of said measurement arm, has a second plurality of angle indicators radially spaced apart in one degree increments around the cylinder axis ; said second section having a window portion positioned in alignment with said channel in said main member whereby said second plurality of angle indicators are visible through said window portion in said second section.
  16. 16. An adjustable squaring tool substantially as herein described with reference to
    and/or as illustrated in the accompanying drawings zn
    16. An adjustable squaring tool substantially as herein described with reference to and/or as illustrated in the accompanying drawings
    <Desc/Clms Page number 15>
    Amended claims have been filed as follows :- 1. An adjustable squaring tool, comprising: an elongate pivot arm; a cylinder member coupled to an end of the pivot arm; a main member having a first and second sections overlying one another with the pivot arm coupled pivotally between them, a graduated arcuate measurement arm extending from the pivot arm and extending through a channel in the main member; a drum member within the cylinder member; spring-loaded detent means operative between the cylinder member and the drum member to locate one of said members at a selected one of range of angles relative to the other of said members to define a correspondingly selected angle between the pivot arm and the main member; and means for clamping the pivot arm between the first and second sections of the main member to prevent relative movement of the pivot arm and main member away from the said selected angle between them.
    2. An adjustable squaring tool according to Claim 1, wherein the spring-loaded detent means comprises at least one spring biased bearing extending outwardly of the member drum and positioned such as to be engageable in a selected one of a plurality of radially spaced recesses or apertures in the cylinder member.
    3. An adjustable squaring tool according to Claim 2, wherein the apertures in said cylinder member are arranged in a plurality of rows, the apertures in each row being radially spaced with respect to each other; and wherein said drum member has a plurality of said spring biased bearings, each bearing being positioned to engage a selectable one of said apertures in an associated one of said rows of apertures.
    <Desc/Clms Page number 16>
    4. An adjustable squaring tool according to Claim 3, wherein said cylinder member has three rows of apertures and said drum member has three spring loaded bearing members.
    5. An adjustable squaring tool according to any preceding claim wherein the first section of said main member has a plurality of first section connection holes; the second section of said main member has a plurality of second section connection holes, said second section connection holes being positioned to align with said first section connection holes to form a plurality of main member holes extending through the main member; and wherein a plurality of connecting members are provided each insertable through an associated one of said main member's connection holes for coupling said first section to said second section such that said measurement arm is permitted to move arcuately relative to said main member.
    6. An adjustable squaring tool according to any preceding claim, wherein the first and second sections of said main member are each provided with complimentary measurement arm channels that are positioned adjacent to each other when said first section is coupled to said second section to form said channel through said main member through which the measurement arm extends.
    7. An adjustable squaring tool according to any preceding claim, wherein said measurement arm, has a first plurality of angle indicators on a first face thereof, a said first section has a window portion positioned in alignment with said channel in said main member whereby said first plurality of angle indicators are visible through said window portion in said first section.
    8. An adjustable squaring tool according to Claim 7, wherein said first angle indicators are radially spaced apart in one degree increments around the centre of said cylinder.
    <Desc/Clms Page number 17>
    9. An adjustable squaring tool according to Claim 7 or Claim 8, wherein said measurement arm has a second plurality of angle indicators on a second face of said measurement arm, said second face being opposite said first face; and wherein said second section has a window portion positioned in alignment with said channel in said main member whereby said second plurality of angle indicators are visible through said window portion in said second section.
    10. An adjustable squaring tool according to Claim 9, wherein said second angle indicators are radially spaced apart in one degree increments around the centre of said cylinder.
    11. An adjustable squaring tool according to any preceding claim, wherein one of said pivot arm and said main member has a leading edge extending through the centre of the cylinder member.
    12. An adjustable squaring tool according to any one of Claims 7 to 10, wherein said pivot arm has a leading edge aligned with the centre of the cylinder member, and wherein said window portion of said first section has an alignment index extending longitudinally of said main member and through the centre of said cylinder, whereby said angle indicator visible through said window portion and aligned with said alignment indicia indicates an angle between said leading edge of said pivot arm and said longitudinal axis of said main member.
    13. An adjustable squaring tool according to any of Claims 7 to 11 wherein said window portion of said first section magnifies said angle indicators to facilitate reading of a measurement of said squaring tool.
    14. An adjustable squaring tool according to any preceding Claim, wherein said main member is provided with a pair of locking apertures positioned adjacent opposite ends of
    <Desc/Clms Page number 18>
    the drum member, and the latter has a pair of threaded extensions extending from opposite ends thereof and through an associated one of said locking apertures; and wherein the said clamping means comprises a locking nut couplable to one of said threaded extensions and a thumbscrew couplable to the other of said threaded extensions, said thumb screw being tightenable to compress said main member between said thumb screw and said locking nut and thereby hold said measurement arm frictionally in a static position relative to said main member.
    15. An adjustable squaring tool, comprising: a pivot arm assembly having an elongated pivot arm and a cylinder coupled to an end of the pivot arm, the cylinder having a plurality of apertures radially spaced in five degree increments; a main member having a first section and a second section, the pivot arm being pivotally coupled between said first section and second section of the main member; a graduated arcuate measurement arm extending from the pivot arm, the measurement arm extending through a channel in the main member;
    a drum assembly having a drum passing through the cylinder of the pivot arm ; and a locking assembly for clamping the pivot arm between the first and second sections of the main member to prevent movement of the pivot arm relative to the main member; wherein: said cylinder has a plurality of apertures arranged into three rows, the apertures in each row being radially spaced with respect to each other; said drum assembly has three spring biased bearings extending outwardly from the drum and positioned to engage a selectable one of said apertures in an associated one of three rows of apertures and corresponding to a selectable angle between said pivot arm and said main member. said first section of said main member has a plurality of first section connection holes;
    <Desc/Clms Page number 19>
    said second section of said main member has a plurality of second section connection holes, said second section connection holes being positioned to align with said first section connection holes to form a plurality of main member holes extending through the main member; a plurality of connecting members are provided, each being insertable through an associated one of said main member's connection holes for coupling said first section to said second section such that said measurement arm is permitted to rotate relative to said main member; said main member has a pair of locking apertures positioned adjacent an interior drum chamber of said main member; said drum has a pair of threaded extensions extending from opposite ends of said drum, each of said threaded extensions passing through an associated one of said locking apertures; said locking assembly has a locking nut couplable to one of said threaded extensions and a thumbscrew couplable to the other of said threaded extensions, said thumb screw being tightenable to compress said main member between said thumb screw and said locking nut thereby to hold frictionally said measurement arm in a static position relative to said main member; said pivot arm has a leading edge, said leading edge being aligned with a centre of said cylinder. said first and second sections of said main member are provided with complimentary measurement arm channels that are positioned adjacent to each other when said first section is coupled to said second section to form said channel through said main member; a first face of said measurement arm has a first plurality of angle indicators radially spaced in one degree increments around the cylinder axis; said first section has a window portion positioned in alignment with said channel in said main member whereby said first plurality of angle indicators are visible through said window portion in said first section;
    <Desc/Clms Page number 20>
    said window portion of said first section is provided with alignment indicia extending along a longitudinal axis of said main member and through the axis of said cylinder, whereby said angle indicator visible through said window portion and aligned
    with said alignment indicia indicates an angle between said leading edge of said pivot arm ZD and said longitudinal axis of said main member; said window portion of said first section magnifies said angle indicators for facilitating reading of a measurement of said squaring tool; and wherein said measurement arm, on a second, opposite, face of said measurement arm, has a second plurality of angle indicators radially spaced apart in one degree increments around the cylinder axis; said second section having a window portion positioned in alignment with said channel in said main member whereby said second plurality of angle indicators are visible through said window portion in said second section.
GB0121994A 2001-09-11 2001-09-11 Squaring tool Expired - Fee Related GB2379514B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0121994A GB2379514B (en) 2001-09-11 2001-09-11 Squaring tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0121994A GB2379514B (en) 2001-09-11 2001-09-11 Squaring tool

Publications (3)

Publication Number Publication Date
GB0121994D0 GB0121994D0 (en) 2001-10-31
GB2379514A true GB2379514A (en) 2003-03-12
GB2379514B GB2379514B (en) 2003-09-03

Family

ID=9921932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0121994A Expired - Fee Related GB2379514B (en) 2001-09-11 2001-09-11 Squaring tool

Country Status (1)

Country Link
GB (1) GB2379514B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107036570A (en) * 2017-05-19 2017-08-11 浙江工贸职业技术学院 A kind of angel measuring instrument

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901113A (en) * 1908-01-11 1908-10-13 Henry O Losch Protractor.
GB342193A (en) * 1930-03-15 1931-01-29 John Campbell Millar A combination drafting appliance for use with blackboards
US2247327A (en) * 1940-03-15 1941-06-24 Joseph J Brady Combination tool
GB581787A (en) * 1942-07-02 1946-10-24 Charles Beltrand Alexander Improvements in combination mathematical instruments
GB717327A (en) * 1951-08-14 1954-10-27 Vaian Georgakis Improvements in drawing instruments
US5419053A (en) * 1993-04-26 1995-05-30 Kathan; Larry Measuring tool
US6209213B1 (en) * 1998-07-27 2001-04-03 Richard J. Moe Multi-purpose measuring tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901113A (en) * 1908-01-11 1908-10-13 Henry O Losch Protractor.
GB342193A (en) * 1930-03-15 1931-01-29 John Campbell Millar A combination drafting appliance for use with blackboards
US2247327A (en) * 1940-03-15 1941-06-24 Joseph J Brady Combination tool
GB581787A (en) * 1942-07-02 1946-10-24 Charles Beltrand Alexander Improvements in combination mathematical instruments
GB717327A (en) * 1951-08-14 1954-10-27 Vaian Georgakis Improvements in drawing instruments
US5419053A (en) * 1993-04-26 1995-05-30 Kathan; Larry Measuring tool
US6209213B1 (en) * 1998-07-27 2001-04-03 Richard J. Moe Multi-purpose measuring tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107036570A (en) * 2017-05-19 2017-08-11 浙江工贸职业技术学院 A kind of angel measuring instrument
CN107036570B (en) * 2017-05-19 2019-03-22 浙江工贸职业技术学院 A kind of angel measuring instrument

Also Published As

Publication number Publication date
GB0121994D0 (en) 2001-10-31
GB2379514B (en) 2003-09-03

Similar Documents

Publication Publication Date Title
US6330752B1 (en) Adjustable squaring tool
US5685085A (en) Diameter-measuring gauge
US6839973B1 (en) Multiple axis leveling device
US5161430A (en) Pedal stroke range adjusting device
CA1191025A (en) Corneal template set
US5813126A (en) Speed square extension bar and saw guide
US6575042B1 (en) Beam-type torsion applying and measuring tool
US20070157484A1 (en) Nut/bolt measuring device
JPS61109668A (en) Electronic torque spanner
US5940978A (en) Builder&#39;s level with hand-grip feature
US7509754B2 (en) Caliper
US3911736A (en) Multiple range torque measuring tool
WO2002010673A8 (en) Linear measurement workpiece gripping device
GB2272302A (en) Combined ruler and protractor drawing instrument
US5210955A (en) Cylinder bore measuring apparatus
GB2052788A (en) Graphite tube assembly
US5992836A (en) Adjustable angle corner block
GB2149917A (en) Caliper gauge
GB2379514A (en) An adjustable squaring tool
US6796046B1 (en) Miter cut, plumb cut, and seat cut angle finding system
US5345692A (en) Accessories for outside micrometers and calipers
US4635370A (en) Caliper
US20210262795A1 (en) Level and level assembly
US4611404A (en) Caliper for thread measurement
US4244107A (en) Indirect reading inside caliper

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060911