CA1163437A - Joint square and divider - Google Patents

Joint square and divider

Info

Publication number
CA1163437A
CA1163437A CA000378379A CA378379A CA1163437A CA 1163437 A CA1163437 A CA 1163437A CA 000378379 A CA000378379 A CA 000378379A CA 378379 A CA378379 A CA 378379A CA 1163437 A CA1163437 A CA 1163437A
Authority
CA
Canada
Prior art keywords
edge
square
wood
guide
piece
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
Application number
CA000378379A
Other languages
French (fr)
Inventor
Philip J. Cunningham
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 CA000378379A priority Critical patent/CA1163437A/en
Application granted granted Critical
Publication of CA1163437A publication Critical patent/CA1163437A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25HWORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00Marking-out or setting-out work
    • B25H7/02Plates having a flat surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L7/00Straightedges
    • B43L7/10Plural straightedges relatively movable
    • B43L7/14Square and sliding straight edges

Abstract

ABSTRACT OF THE DISCLOSURE
The present invention relates to carpentry tools particularly useful in making woodworking joints. A tool for dividing the area between two straight parallel edges is disclosed comprising a body member and two guide means at opposite ends of said body for engaging the edges of the wood.
positioning means are provided in the length of said body member colinear with said quide means to divide the distance therebetween into predetermined segments. The wood is divided by bringing the guide means into contact within the edges thereof and sliding the tool therealong with a pencil in the appropriate location of said positioning means. A woodworking square is disclosed comprising a guide and a planar body extending perpendicular from said guide with the body including an upper portion and a 45 degree diagonal portion. The upper portion intersects with said diagonal portion at the junction with the guide. Such an arrangement simplifies various measurements for making woodworking joints.

Description

,3 7 1 FIELD OF T~E INVENTION
____________ ________ The present invention relates to carpentry tools useful in marking boards in preparation for ~oining the various pieces of wood. In particular the invention relates to a tool designed to divide a piece of wood along its length between two parallel edges of the wood and a carpenters square for marking out a squared region on a piece of wood.
BACKGROUND OF THE INVENTION
_______________~_____ .
The most well known of all woodworking tools is the carpenters square which basically consists of two ruled portions secured at 90 degrees to one another. Such a square is used to provide a straight edge for marking a line perpendicular to the edge of a piece of wood and can also be used for measuring on the wood. The tool can also be used to check various joints to ensure they are perpendicular to one another.
A type of miter square is shown in United States Patent 1,374,815 which issued to R.A. Breul, April 12, 1921 which essentially uses the principle of a carpenters square in combination with a 45 degree diagonal member with one of the edges of the square acting as a guide for sliding along in abutment with the edge of a piece of wood. This type of tool has the advantage that the guide simplifies positioning of the square relative to the wood and as such minimizes errors with respect to drawing the 90 degrees and measuring across the width of the board.
A slightly more complicated tool is shown in United States Patent 2,332,250 which issued to Newell, August 14, 1945. As shown in Figure 3 of the drawings the tool :~6~ 7 1 comprises two perpendicular guide portions in combination with a 45 degree diagonal member. Because of this structure the tool may be placed at the corner of a piece of wood with a 45 degree line being defined which would intersect the corner. Although the tool can be used as a square in a limited number of applications it is primarily designed as a gage more commonly used by a machinist.
Variations of carpenters square are shown in United States Patent 700,023 which issued to J. U. Duby May 3, 1902 and United States Patent 732,379 which issued to Shireman June 30, 1903. The Shireman reference discloses a variation of the capenters s~uare wherein one edge acts as a guide for engaging the edge of a piece of wood and the other arm of the square is marked in inches and provided with a number of apertures for positioning a pencil at various locations across the wood. With this device one measures the width of the piece of wood, selects the appropriate apperture for dividing the wood as he wishes and places a pencil in this apperture and slides the square along the length of the wood. The Duby reference again uses a similar principle with a guide for abuting with the edge of the wood and various appertures spaced from this guide member for dividing the wood into divisions however the appropriate apperture is only determined in relation to the overall width of the wood.
These devices used to sub-divide the surface of a piece of wood into various segments require accurate measurement of the overall width of the wood and once this is known the selection of an appropriate apperture 1 for dividing of the wood. With the present invention this operation is greatly simplified by providing a tool in which the desired segments have already been determined and the position of the device across the wood compensates for boards of various widths. This device is to used with generally rectangular pieces of wood in which the sides are parallel. A carpenter's square having a particular configuration according to the present invention simplifies the layout of an area for various types of carpentry joints. With a square of the present invention the square does not have to be re-orientated relative to the finished edge of a piece of wood and is particularly useful in combination with the tool for dividing the surface of the piece of wood into segments.
SUMMARY OF THE INVENTION
A woodworking square according to the present invention comprises a planar body member having a straight aligning edge, a first scribing edge perpendicular to the aligning edge and a second scribing edge disposed between said first scribing edge and the aligning edge at a 45 degree angle relative to the edges. This second edge intersects the junction point of the aligning edge and the first scribing edge. This tool simplifies the marking of wood in preparation for making wood joints, commonly used in furniture making.
According to an aspect of the invention, a guide edge is provided to contact the edge of the wood and position the aligning edge on the edge of the wood.
Also disclosed in the application, is a simple dividing tool which can advantagously be used in combination with the woodworking square.

" ~63~37 Preferred embodiments of khe invention are shown in the drawings where;
Figure 1 is an exploded view of a bridal joint;
Figure 2 is a perspective view with the woodworking square positioned on a rectangular piece of wood Figure 3 is a top view of the woodworking square;
Figure 4 is a partial perspective view of a joint of a piece of wood having a rounded corner;
Figure 5 is a top view of the square superimposed on a piece of wood having a rounded corner similar to Figure 4;
Figure 6 is a perspective view of the carpenters tool for dividing the length of a piece of wood;
Figure 7 is a top viw of the carpenters~tool placed on a piece of wood;
Figure 8 is a perspective view of the carpenters tool pIaced on the end of a piece of wood for dividing thereof Figure 9 is a top view of the woodworking tool placed on a narrow width piece of wood;
Figure 10 is a view similar to Figure 9 illustrating the square repositioned for marking out the desired area;
and, Figure 11 is a front view illustrating the square being used to check a carpentry joint.
DETAILED DESCRIPTION OF T~E PREFERRED EMBODIMENTS
The carpenters joint square 2 shown in Figure 2 comprises a guide 4 used to abut with the perpendicular edge of the piece of wood 100 and slide there along. The guide defines the aligning edge of the square. In carpentry and particularly where fine measurements are ~. ~

;3~3~
\

1 needed such as in cabinet joints, one edge of the piece of wood is considered the finished edge from which all measurements are made. Guide 4 is adapted to abut with this edge and slide there along. The square includes a planar portion 3 including an upper portion 6 extending perpendicularly from the guide member 4 and a diagonal portion 8 extending at 45 degrees to member 6. The upper edge 7 of member 6 provides a straight scribing edge for lining of the piece of wood with a pencil 110 to draw a line such as 200 which extends across the width of the piece of wood and perpendicular to the edges thereof. In order to define the squared out region 220 on the piece of wood the square is positioned to draw line 200 and without moving the square the line 210 is drawn to intersect the opposite edge of the wood at the intersection of the diagonal 8 and the edge of the wood.
The upper edge of diagonal 8 defines a second scribing edge. The square is then slid along the edge of the wood 100 until the upper portion 6 aligns with the ticked edge of the wood at which time the second line is drawn for defining the area 220. As can be seen in Figure 3 the scribing edge of the diagonal portion 8 intersects with the scribing edge of member 6 at the junction with the aligning edge defined by the guide member with the angle between these scribing edges being 45 degrees. Because of this geometric relationship of these various edges the area 220 will be a square region assuming the edges of the piece of wood 100 are parallel.
Another application of this square can be seen with respect to Figures 4 and 5 wherein a piece of wood 300 has been provided with a rounded corner 310. If one ~3~',37 1 wishes to obkain the dlagonal bisectiny the corner, this is easily accomplished by placing the guide 4 against the edge of the wood and aligning the upper portion 6 with the other edge of the wood. Once aligned, the diagonal is established by passing a pencil along the upper surface of diagonal 8. Such a diagonal may be required if the piece o~ wood is to be cut along the diagonal or joinîng with a dowel or pin joint or possibly so that the components can be joined with others.
The companion carpentry tool divider is shown in Figure 6 and comprises a body member 400 and guide means 402 positioned at opposite ends o~ the body member. A
number of appertures 404 are provided within the length o~ the body member defined between the inner edges of the ~ ~4~ ~7 1 guide means 40~ for dividing the length into equal segments. For example, it can be seen that the center apperture divides the leng~h between the inner sur~aces of the guide means 402 into two equal segments A~ and the two outside appertures allow this length to be divided into thirds shown as segments C. As can be appreciated these appertures are permanently located within the body member and the segments remain fixed. However by placing the tool across a piece of wood as shown in Figure 7 the guide pins may be brought in contact with the edges of the piece of wood 410 and a pencil may be placed in one of the appertures. By sliding the tool along the piece of wood while maintaining the guide pins in contact with the edges of the piece of wood a line will be drawn dividing the width of the piece of wood according to the apperture chosen. By using the two outside appertures as shown in Figure 7 lines 415 and 416 may be drawn to divide the board into thirds. Therefore it can be appeciated that the adjustment of the tool is performed mechanically by bringing the pins into contact with the edges of the piece of wood and the desired lines for segmenting the board are easily drawn by inserting the pencil in the appropriate apperture. In carpentry most cabinet joints are based on fractions of 1/2, 1/3 or 1/4 and any of these can easily be located by properly placing appertures within the body member. '~his greatly simplifies the operation of accurately drawing the lines and reduces errors caused by mental mistakes. As can be appreciated, finished wood has a nominal dimension and a finished dimension with the finished dimension often l being a very difficult number to divide easily into thirds or quarters. With this tool this is not required, one merely has to place the tool across the board and slide the tool there along with a pencil in the appropriate apperture~
In some circumstances for example with dove tail joints it is necessary to provide a grid type region at one end of the board defining a squared out region and dividing the board into thirds. This is shown at one end of the board shown in Figure 7 and is accomplished through a combination of the carpentry tool of Figure 6 and the carpenters square previously discussed. The lines 500 and 502 divide the width of the board into thirds and are accomplished by the tool of Figure 6 and the squared out region 510 is accomplished through the use of the carpentry square. The diagonal 520 is also drawn by the carpenters square on the diagonal portion 8 and the points of intersection between this diagonal and the lines 500 and 502 marked on the board. A second diagonal extending from the opposite corner may be adjusted to complete the grid type region consisting of a 3 X 3 grid. Once this has been dawn on the board the desired end configuration can be sketched in relation to this grid. As can be appreciated no measurements are required and the chance of error is thereby reduced.
In Figure 8 the dividing tool is shown on the end of a piece of wood 600 with lines 6Ql and 602 dividing the width of the board into thirds. These lines would be required if a tongue and groove type joint was being used. The tool may come in a variety of sizes for use 1 with different widths of boards and a small tool would be used for dividing the end portion of a board.
The carpenters square in Figure 9 and 10 is being used with a very narrow piece o~ wood 700. Again the guide 4 is brought into abut the edge of the yiece of wood and a line 702 could be drawn by the proper positioning of the square such that the upper portion 6 aligns with this line. The square may then be slid along the board until the end portion 15 entersects line 702 at the edge of the wood with line 703 being drawn along this edge. By again sliding the square along the piece of wood as shown in Figure 10 a third line 704 may be drawn across the wood such that the squared out region 706 is produced. Therefore it can be appreciated that the recess portion at the base of the carpenters square provides a edge portion extending at 45 degrees to the guide member 4 and if e~tended would intersect the diagonal portion 8 at 90 degrees. This surface is extremely use~ul when very narrow boards are used. This recess portion of the base member can also be used as shown in Figure 11 to check the accuracy of a carpenters joint as the diagonal portion 8 and the edge 15 form a ~0 degree angle which can be placed over the carpenter joint.
Although preferred embodiments of the invention have been described herein in detail, it will be understood that variations may be made thereto without departing from the spirit of the invention or the scope of the appended claims.

Claims (7)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A woodworking square comprising a planar body member having a straight aligning edge, a straight first scribing edge perpendicular to said aligning edge and a second straight scribing edge disposed between said first scribing edge and said aligning edge and positioned at 45 degrees relative to said aligning edge and said first edge, and wherein said second scribing edge intersects the junction point of said aligning edge and said scribing edge.
2. A woodworking square as claimed in Claim 1 wherein said square is one piece.
3. A woodworking square as claimed in Claim 1 wherein a guide edge is provided adjacent said aligning edge to permit sliding of said square along one straight edge of a piece of wood.
4. A woodworking square as claimed in Claim 1 including a guide means extending perpendicularly from said planar body and positioned to be colinear with said aligning edge.
5. A woodworking square as claimed in Claim 4 wherein said guide means is an elongate rectangular plate portion secured to said aligning edge to provide a "T" junction with said planar body member.
6. A woodworking square as claimed in Claim 3, 4 or 5, wherein said square is one piece.
7. A woodworking square as claimed in Claim 1 or 5, wherein said planar body member includes a recessed portion below said second scribing edge to provide two intersecting edges defining a 90 degree junction with one of said edges being positioned at 45 degree relative to said aligning edge.
CA000378379A 1981-05-26 1981-05-26 Joint square and divider Expired CA1163437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000378379A CA1163437A (en) 1981-05-26 1981-05-26 Joint square and divider

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000378379A CA1163437A (en) 1981-05-26 1981-05-26 Joint square and divider

Publications (1)

Publication Number Publication Date
CA1163437A true CA1163437A (en) 1984-03-13

Family

ID=4120065

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000378379A Expired CA1163437A (en) 1981-05-26 1981-05-26 Joint square and divider

Country Status (1)

Country Link
CA (1) CA1163437A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654978A (en) * 1985-10-04 1987-04-07 Wolford Jr Otis Marking guide for use with metal studs
US4736525A (en) * 1987-04-16 1988-04-12 Deason John M Floor square
US4773163A (en) * 1985-10-04 1988-09-27 Wolford Jr Otis Marking guide for use with framing studs
US5090129A (en) * 1990-12-10 1992-02-25 Cunningham Philip J Carpenter square
US5749154A (en) * 1996-05-20 1998-05-12 Scharf; Robert E. Bull nose corner marking apparatus
FR2979366A1 (en) * 2011-08-30 2013-03-01 Concetto Giancola Cutting pattern tracing device for laying tiles, has gauge unit arranged corresponding to profile of frame for framing door or passage cutting piping, where additional extensions are provided for measurement of specific range

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654978A (en) * 1985-10-04 1987-04-07 Wolford Jr Otis Marking guide for use with metal studs
US4773163A (en) * 1985-10-04 1988-09-27 Wolford Jr Otis Marking guide for use with framing studs
US4736525A (en) * 1987-04-16 1988-04-12 Deason John M Floor square
US5090129A (en) * 1990-12-10 1992-02-25 Cunningham Philip J Carpenter square
US5749154A (en) * 1996-05-20 1998-05-12 Scharf; Robert E. Bull nose corner marking apparatus
FR2979366A1 (en) * 2011-08-30 2013-03-01 Concetto Giancola Cutting pattern tracing device for laying tiles, has gauge unit arranged corresponding to profile of frame for framing door or passage cutting piping, where additional extensions are provided for measurement of specific range

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