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WO1997003336A1 - Appareil de mesure d'angles pour onglets et biseaux - Google Patents

Appareil de mesure d'angles pour onglets et biseaux Download PDF

Info

Publication number
WO1997003336A1
WO1997003336A1 PCT/GB1996/001605 GB9601605W WO9703336A1 WO 1997003336 A1 WO1997003336 A1 WO 1997003336A1 GB 9601605 W GB9601605 W GB 9601605W WO 9703336 A1 WO9703336 A1 WO 9703336A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
angle
support member
corner
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.)
Ceased
Application number
PCT/GB1996/001605
Other languages
English (en)
Inventor
John Kelly Fox
William Graham
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.)
PRODUCT DEVELOPMENT TAYSIDE Ltd
Original Assignee
PRODUCT DEVELOPMENT TAYSIDE Ltd
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 PRODUCT DEVELOPMENT TAYSIDE Ltd filed Critical PRODUCT DEVELOPMENT TAYSIDE Ltd
Priority to AU63136/96A priority Critical patent/AU6313696A/en
Publication of WO1997003336A1 publication Critical patent/WO1997003336A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00—Marking-out or setting-out work
    • 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
    • G01B3/563—Protractors

Definitions

  • This invention relates to apparatus for measuring angles for mitres and bevels.
  • a simple mitre box is known for use in cutting mitres.
  • a workpiece to be cut for example a picture moulding or an architrave, is placed in the mitre box and pre-set saw guides in the mitre box act to control the action of a saw and enable an accurate cut to be obtained, for example a 45° cut.
  • Mitre jigs are known for use in cutting larger workpieces, for example heavy mouldings or architraves. These mitre jigs also have hole saw guides for controlling the action of a saw and giving a cut at a required angle. The mitre jigs can be set at any angle required and this makes them more versatile than the mitre box.
  • Electric power mitre saws are also known. These electric power mitre saws can be adjusted to various angles. Furthermore, the blade of the electric power mitre saws can be tilted for cutting roof spars, rafters and the like.
  • the problem with all of the above mentioned mitre apparatus is that the operator has to determine the exact angle that is required in advance of cutting the workpiece and setting up the apparatus.
  • the determining of the required mitre angle is an irritating and time consuming job that has faced joiners, carpenters and other persons for many years. If, for example, architraves have to be fitted around a doorway, then angles can easily be determined if the doorway is square. It is simply necessary to use a normal combination square. This gives the user a 90° angle or a pre-set 45° angle. The required mitre angle is 45°. However, if the doorway is not square, then the combination square is no good as the angle of the mitre will not be half of 90°, ie 45°.
  • bevel can be pushed against a lintel of a door frame at the corner against the upright of the frame and locked. This gives the bevel angle but the actual mitre angle needed to enable architraves, mouldings and the like to be cut neatly still has to be worked out.
  • One known way is to hold the bevel against a protractor in order to obtain the correct bevel angle, and then to divide the bevel angle in half in order to obtain the mitre angle. This operation works fine in theory but not in practice and often mitre joints so measured just do not fit. Making corrections to ensure that mitre joints fit is time consuming and often corrective carpentry leaves the original workpiece, for example the architrave or moulding, too short, so that the original workpiece has to be discarded with consequent increased expense.
  • apparatus for measuring angles for mitres and bevels which apparatus comprises a first arm which is connected by a first pivot to a first support member, a second arm which is connected by a second pivot to a second support member, and a third pivot which connects the first and the second arms together such that the first and the second arms are pivotable away from the first and the second support members in order to be locatable in a corner for measuring a bevel angle of the corner and such that the first and the second arms are pivotable towards the first and the second support members in order to be locatable around a corner for measuring an external bevel angle of a corner, the apparatus being such that the first arm is automatically set at the mitre angle for a measured internal bevel angle or at the mitre angle for a measured external bevel angle, and the apparatus being such that it is able to be abutted against a workpiece with the first arm overlapping the workpiece in order to mark the workpiece with the mitre angle.
  • the apparatus of the present invention may be a very simple and inexpensive tool to make. Also, the apparatus of the present invention is ideal for do-it- yourself work, and also for a professional joiner requiring a tool that is easy and quick to use.
  • the apparatus may be especially useful for light work, such for example as fitting edgings, light door facings, mouldings and the like. In order to use the apparatus of the present invention, it is simply necessary to push the apparatus into or around a corner, whereupon the apparatus sets the bevel angle and automatically sets the correct mitre angle.
  • the apparatus is one in which the first support member is thicker than the first arm. This allows the apparatus of the invention easily and firmly to be abutted against a workpiece for the purpose of marking the workpiece.
  • the apparatus will be one in which the first support member is of the same thickness as the second support member, and in which the first arm is of the same thickness as the second arm.
  • the first arm is longer than the second arm. This is because the first arm will normally be the arm that is used for mitre-marking purposes. If desired however the first and the second arms can be of the same length or the second arm can be longer than the first arm.
  • the apparatus may be one in which the first support member is L-shaped, and in which the second support member is a mirror-image of the shape of the first support member. The first and the second support members may be in other shapes if desired.
  • the apparatus may be one in which the third pivot member is positioned at adjacent ends of the first and the second arms, and in which the said adjacent ends of the first and the second arms are rounded to fit in a corner being measured.
  • the apparatus is preferably one in which the first and the second support members are slidably connected together, and in which the apparatus includes locking means for locking the first and the second support members together.
  • the second support member may slide on a rod member which projects from the first support member. Other arrangements may be employed.
  • the rod member is preferably of circular cross section but it may be of other cross sectional shapes.
  • the rod member may be a flat rod member.
  • the apparatus may include an angle measuring scale on the rod member for giving the measured internal bevel angle or the measured external bevel angle.
  • the angle measuring scale may also give the mitre angles if desired.
  • the locking means will usually be a screw threaded locking means.
  • the screw threaded locking means may thus be hand turnable screw or bolt.
  • Other types of locking means may be employed, for example a sprung locking means.
  • the apparatus of the invention may be made in any suitable and appropriate materials including metals, wood and plastics materials. Combinations of these materials may also be employed.
  • Figure 1 illustrates the difficulty of measuring an angle using a combination square
  • Figure 2 illustrates the difficulty of measuring an angle using a bevel measuring tool
  • Figure 3 further illustrates the difficulty of obtaining a precise mitre angle using the bevel measuring tool
  • Figure 4 shows first apparatus of the invention being used to measure an internal bevel angle of a corner
  • Figure 5 shows how the apparatus as used in Figure 4 is further used to mark the required mitre angle on a workpiece
  • Figure 6 shows the first apparatus of the invention in use in measuring an external bevel angle of a corner
  • Figure 7 shows how the apparatus as used in Figure 6 can be further used to mark the required mitre angle on a workpiece
  • Figure 8 shows second apparatus of the invention being used for setting a straight edge to a given pitch
  • Figure 9 shows third apparatus of the invention being used for drawing a circle
  • Figures 10 and 11 show the third apparatus of the invention being used with a protractor.
  • the combination square 2 is being used to measure an angle 4 in the corner of a doorway 6. It can be seen that the combination square 2 is no good because the angle 4 is greater than 90°. A pre-set 45° mitre is also not satisfactory in this circumstance.
  • Figure 2 illustrates how the angle 4 can be obtained as an opened size on a bevel tool 8 but the bevel tool 8 does not give any means of halving this angle to obtain the required mitre angle. Similar problems can be seen from Figure 3 where bevel tools 8 are being used to try and measure an internal angle 10 and an external angle 12 on brickwork 14.
  • Figures 4 - 7 show apparatus 16 which is in according with the invention and which is for measuring angles for mitres and bevels.
  • the apparatus 16 comprises a first arm 18 which is connected by a first pivot 20 to a first support member 22.
  • the apparatus 16 also comprises a second arm 24 which is connected by a second pivot 26 to a second support member 28.
  • the apparatus 16 has a third pivot 30 which connects the first and the second arms 18, 24 together such that the first and the second arms 18, 24 are pivotable away from the first and the second support members 22, 28 in order to be locatable in a corner 32 as shown in Figure 4 for measuring an internal bevel angle 34 of the corner 32.
  • the third pivot 30 also connects the first and the second arms 18, 24 together such that the first and the second arms 18, 24 are pivotable towards the first and the second support members 22, 28 in order to be locatable around a corner 36 for measuring an external bevel angle 38 of the corner 36.
  • the apparatus 16 is such that the first arm 18 is automatically set at the mitre angle for a measured internal bevel angle 34 or for a measured external bevel angle 38.
  • the apparatus 16 is also such that it is able to be abutted against a workpiece 40 as shown in Figures 5 and 7 with the first arm 18 overlapping the workpiece 40 in order to mark the workpiece 40 with the mitre angle.
  • the first support member 22 is thicker than the first arm 18. This enables the apparatus 16 easily and positively to be located against the workpiece 40 as shown in Figures 5 and 7.
  • the first support member 22 is of the same thickness as the second support member 28, but it may be thicker if desired.
  • the first arm 18 is of the same thickness as the second arm 24.
  • the first arm 18 is longer than the second arm 24. This arrangement facilitates the easy marking of the workpiece 40, whilst at the same time keeping the apparatus 16 compact.
  • the first support member 22 is L-shaped, and the second support member 28 is a mirror-image shape of the first support member 22.
  • the first and the second support members 22, 28 each have a leg 42 which is provided with a slot 44 which extends inwardly from the free end of the leg 42 as shown.
  • the first and the second arms 18, 24 are located one in each of the slots 44 so that they pivot in the slots on their respective first and second pivots 20, 26.
  • the third pivot 30 is positioned at adjacent ends 46 of the first and the second arms 18, 24 as shown.
  • the adjacent ends 46 of the first and the second arms 18, 24 are rounded as shown in order to fit in the corner 32 as shown in Figure 4.
  • the first and the second support members 22, 28 are slidably connected together. This slidable connection is effected by having the second support member 28 slide on a rod member 48 which is fixed to and projects from the first support member 22. As can be seen from Figures 4 - 7, the rod member 48 is of circular cross section.
  • the rod member 48 has an angle measuring scale 50 for giving the measured internal bevel angle 34 or the measured external bevel angle 38.
  • the apparatus 16 includes locking means in the form of a screw threaded locking screw 52.
  • This locking screw 52 has a knob 54 which is easily turned by hand so that the locking screw 52 can easily be tightened and untightened for the purpose of locking the first and the second support members 22, 28 together in position when an internal bevel angle 34 or an external bevel angle 38 has been measured.
  • the apparatus 16 can be used to mark the mitre angle as shown in Figures 5 and 7.
  • the locking screw 52 is simply loosened to allow relative movement between the first and the second support members 22, 28 for the new bevel angle to be measured.
  • Figure 8 shows second apparatus 16 which is similar to the apparatus 16 shown in Figures 4 - 7 except that, in Figure 8, the first support member 22 is provided with a vial 55 which is set into a housing 56.
  • the vial 55 enables a person to set a straight edge or similar to a given pitch as formed by the workpiece 40. It is simply necessary to hold the first arm 18 against the workpiece 40, and then to lift up the first arm 18 at one end until the vial 55 reads level. The pitch is then set. It is also possible to set a required pitch using a protractor (not shown) to set the apparatus 16 to the required pitch. This is done by lifting the workpiece up at one end until the vial 55 reads level. This is then the required pitch.
  • a clip-on level or other detachable level may be employed.
  • the apparatus 16 shown in Figure 8 is also provided with three holes 57 in the first arm 18 and one hole 57 in the second arm 24. These holes 57 are not used in the method of use shown in Figure 8.
  • Figure 9 shows the method of use of the holes 57. More specifically, Figure 9 shows third apparatus 16 of the invention, this apparatus being the same as the apparatus 16 shown in Figure 8 except that the vial 55 and the housing 56 have been omitted.
  • a nail 58 has been shown inserted through the outermost hole 57 in the firm arm 18. The nail 58 holds the arm 18 secure.
  • a pencil 59 is then able to be held in the hole 57 in the second arm 24, whereupon it is easy to draw circles such for example as the circle partially illustrated as circle 60.
  • the nail 58 can be placed in one of the other two holes 57 in the first arm 18.
  • a bradawl or other means may be used.
  • the ability to use the apparatus 16 to set a straight edge or similar to a given pitch in the manner shown in Figure 8, or to draw circles in the manner shown in Figure 9 makes the apparatus more versatile than it would otherwise be and this versatility is commercially advantageous in securing sales of the apparatus of the invention.
  • FIG. 10 shows the apparatus 16 and the protractor 61 being used to measure a mitre angle.
  • Figure 11 shows the apparatus 16 and the protractor 61 being used to measure a bevel angle.
  • the apparatus 16 can be used on internal and external angles. If desired, a small lip on the bottom edge of the protractor 61 may be provided.
  • the protractor 61 is an alternative way of measuring mitre angles and bevel angles to using the rod member 48 with its angle measuring scale 50.
  • the rod member 48 may be a flat strip of material instead of the illustrated rod member of circular cross section.
  • the use of a flat strip of material may give more room for marking degrees and it may be easier to read the degree markings.
  • other means of getting the required angle readings may be employed using the sliding action of the apparatus 16.
  • an angle reading means utilising a light emitting diode display may be employed.
  • first and the second arms 18, 24 can be of different relative lengths than those shown.
  • first and the second support members 22, 28 can be of a different shape.
  • the apparatus 16 can be made in any suitable materials, including metal, wood or plastics materials, or a combination of these materials.
  • Connecting means other than the rod member 48 and locking means other than the locking screw 52 may be employed.
  • the locking means may be any suitable and appropriate locking means that will hold the apparatus of the invention firm in a desired position.
  • the locking means may be, for example, a spring action locking means, a push button locking means, or a clothes peg type spring locking means.
  • the locking means may be such that by pressing a button or a lever, the locking means will release the lock to let the apparatus of the invention slide to a desired position. Once pressure is removed from the button or lever, then spring action may lock the apparatus of the invention firm.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

Appareil (16) de mesure d'angles pour onglets et biseaux comprenant un premier bras (18) raccordé par un premier pivot (20) à un premier élément support (22), un second bras (24) raccordé par un deuxième pivot (26) à un second élément support (28), et un troisième pivot (30) qui raccorde les premier et second bras (18, 24) de sorte que ceux-ci (18, 24) puissent pivoter dans la direction opposée aux premier et second éléments supports (22, 28) afin de pouvoir être positionnés dans un coin pour mesurer un angle de biseau du coin, et de sorte que les premier et second bras (18, 24) puissent pivoter vers les premier et second éléments supports (22, 28) afin de pouvoir être positionnés autour d'un coin pour mesurer un angle de biseau externe d'un coin. L'appareil (16) est conçu de sorte que le premier bras (18) soit automatiquement ajusté au niveau de l'angle d'onglet pour un angle de biseau mesuré. L'appareil (16) peut être placé en butée contre une pièce (40), le premier bras (18) chevauchant la pièce (40) afin de la marquer avec l'angle d'onglet.
PCT/GB1996/001605 1995-07-07 1996-07-03 Appareil de mesure d'angles pour onglets et biseaux Ceased WO1997003336A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63136/96A AU6313696A (en) 1995-07-07 1996-07-03 Apparatus for measuring angles for mitres and bevels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9513917.6 1995-07-07
GBGB9513917.6A GB9513917D0 (en) 1995-07-07 1995-07-07 Apparatus for measuring angles for mitres and bevels

Publications (1)

Publication Number Publication Date
WO1997003336A1 true WO1997003336A1 (fr) 1997-01-30

Family

ID=10777315

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/001605 Ceased WO1997003336A1 (fr) 1995-07-07 1996-07-03 Appareil de mesure d'angles pour onglets et biseaux

Country Status (3)

Country Link
AU (1) AU6313696A (fr)
GB (1) GB9513917D0 (fr)
WO (1) WO1997003336A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846962A1 (de) * 1998-10-12 2000-04-13 Dieter Mayer Gehrungshilfe
WO2000067969A1 (fr) * 1999-05-06 2000-11-16 Ulf Gullberg Dispositif de reglage d'un angle de coupe
CN105300257A (zh) * 2015-11-27 2016-02-03 东方电气集团东方汽轮机有限公司 角度测量系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259619A (en) * 1940-03-07 1941-10-21 Fred D Cooper Miter square
DE848090C (de) * 1945-06-21 1952-09-01 Walter Wuhrmann Geraet zum Halbieren von Winkeln
GB2109120A (en) * 1981-10-09 1983-05-25 Thomas Bartlett Snell Improvements relating to angle determining devices
GB2248505A (en) * 1990-10-06 1992-04-08 David Smith Angle divider

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2259619A (en) * 1940-03-07 1941-10-21 Fred D Cooper Miter square
DE848090C (de) * 1945-06-21 1952-09-01 Walter Wuhrmann Geraet zum Halbieren von Winkeln
GB2109120A (en) * 1981-10-09 1983-05-25 Thomas Bartlett Snell Improvements relating to angle determining devices
GB2248505A (en) * 1990-10-06 1992-04-08 David Smith Angle divider

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19846962A1 (de) * 1998-10-12 2000-04-13 Dieter Mayer Gehrungshilfe
WO2000067969A1 (fr) * 1999-05-06 2000-11-16 Ulf Gullberg Dispositif de reglage d'un angle de coupe
US6560886B2 (en) 1999-05-06 2003-05-13 Ulf Gullberg Device for adjustment of cut angle
CN105300257A (zh) * 2015-11-27 2016-02-03 东方电气集团东方汽轮机有限公司 角度测量系统

Also Published As

Publication number Publication date
AU6313696A (en) 1997-02-10
GB9513917D0 (en) 1995-09-06

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