CA1039496A - Tool guide for tracing or cutting shapes from sheets - Google Patents
Tool guide for tracing or cutting shapes from sheetsInfo
- Publication number
- CA1039496A CA1039496A CA220,968A CA220968A CA1039496A CA 1039496 A CA1039496 A CA 1039496A CA 220968 A CA220968 A CA 220968A CA 1039496 A CA1039496 A CA 1039496A
- Authority
- CA
- Canada
- Prior art keywords
- bar
- face
- sheet
- longitudinally extending
- base plate
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
-
- 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
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
- B25H1/0078—Guiding devices for hand tools
Abstract
ABSTRACT OF THE DISCLOSURE
A guide for use with a marker or cutting tool to trace out a path o a piece of flat, planar material or to cut from such material a portion to a particular selection shape. The guide includes a base plate having means on one face for retaining the same on the surface of the sheet of material consisting of impaling pins, double-faced tape or suction cups, and a pair of longitudinally extending channels disposed transversely to one another in the opposite face. A
pair of cam follower members are slidably mounted in respective ones of the channels and clampingly and pivotally attached to a longitudinally extending bar. A head assembly is secured to the bar at one end thereof and includes means for detachably securing thereto a tool element engage-able with the surface of the sheet of material on which the base is mounted.
A guide for use with a marker or cutting tool to trace out a path o a piece of flat, planar material or to cut from such material a portion to a particular selection shape. The guide includes a base plate having means on one face for retaining the same on the surface of the sheet of material consisting of impaling pins, double-faced tape or suction cups, and a pair of longitudinally extending channels disposed transversely to one another in the opposite face. A
pair of cam follower members are slidably mounted in respective ones of the channels and clampingly and pivotally attached to a longitudinally extending bar. A head assembly is secured to the bar at one end thereof and includes means for detachably securing thereto a tool element engage-able with the surface of the sheet of material on which the base is mounted.
Description
~03949~;
This invention relates to a guide for use with a marker or cutting tool to trace ou~ a path on a piece of flat p]anar material or to cut from the same a portion to a particular selected shape. In a preferred embodiment of the invention the guide is adjustable and is used to cut out oval shaped mats for framing photographs or cutting sheets of plastic, wood or the like into various elliptical sizes and shapes. The guide may be modified in keeping with other embodiments to trace out or cut circles, rectangles or squares on a flat planar sheet of material.
With respect to formingoval shapes, ellipsographs are known as exemplified by Canadian Patent 111,843 issued ~ecember 19, 1907 and which consists of a base msmber having two guide slots or channels disposed at right angles to one another and in which are slidably ; mounted two guides adjustably attached to an arm carrying a stylus for tracing out a path on the surface on which the guide rests.
,~! A principal object of the present invention is to provide an improved guide of the foregoing type ancl one which is suitable for use in cutting sheet material on which the guide is placed. In general the present guide is substantially simplified over that of the patented device and includes a cutter for cutting the material. The arrangement of the components furthermore is such that it is more adaptable for cutting.
Accordingly, there is provided in accordance with the present invention a guide for use in tracing a path or cutting along such path on a flat planar sheet of material comprising a base plate having - means on one face thereof for retaining the same in position on the surface of said ~heet of material and a pair of longitudinally extending channels disposed transversely to one another in the opposite face; a pair of cam follower members slidably mounted in respective ones of the channels; a longitudinally extending bar having a slot extending in the longitudinal dlrection thereof; means adjustably positioning respective ones of the cam follower members in ~ai~ 910t and pivotally connectin~ the same to said bar and a head assembly secured to said bar at one end ~C~39496 thereof and including means for detachably securing thereto an element engageable with the surface of the sheet of material on which the base is mounted.
The invention is illustrated by way of example with reference to the accompanying drawings wherein:
Figure 1 is an oblique view of one embodiment of a guide constructed in accordance with the present invention and having a cutting member attached thereto;
Figures 2 and 3 are oblique views of a portion of the guide with parts detached therefrom;
Figure 4 is a cross-sectional view taken along section 4-4 of Figure l;
Figure 5 is an oblique view of the guide illustrated in Figure 1 but with a router tool attached thereto;
Figure 6 is an oblique view of the device illustrated in Figure S but with the router tool detached from the guide;
Figure 7 is an oblique view of another embodiment of a.guide provided in accordance with the present in~ention;
Figure 8 is ~imilar to Figure 7 but illustrating the cutter head detached from the guide; and Figure 9 is an oblique view of a portion of the bar and an attachment therefor adapting the same for use in tracing or cutting a circle.
Referring now in detail to the drawings, shown in Figure 1 is a tool gulde 10 consisting of a base 20, a bar 30 having a cutter head 40 attached to one end thereof and a pair of slides 50 adjustably attached to the bar 30. During use of the device the guides slide in channels in the upper surface of the base causing thq cutter head to follow a particular path when the arm is rotated in a plane parallel to the surface on which the base rests.
The base 20 is a rigid planar member having longitudinally extending grooves or channels 21 and 22 in the upper surface thereof.
This invention relates to a guide for use with a marker or cutting tool to trace ou~ a path on a piece of flat p]anar material or to cut from the same a portion to a particular selected shape. In a preferred embodiment of the invention the guide is adjustable and is used to cut out oval shaped mats for framing photographs or cutting sheets of plastic, wood or the like into various elliptical sizes and shapes. The guide may be modified in keeping with other embodiments to trace out or cut circles, rectangles or squares on a flat planar sheet of material.
With respect to formingoval shapes, ellipsographs are known as exemplified by Canadian Patent 111,843 issued ~ecember 19, 1907 and which consists of a base msmber having two guide slots or channels disposed at right angles to one another and in which are slidably ; mounted two guides adjustably attached to an arm carrying a stylus for tracing out a path on the surface on which the guide rests.
,~! A principal object of the present invention is to provide an improved guide of the foregoing type ancl one which is suitable for use in cutting sheet material on which the guide is placed. In general the present guide is substantially simplified over that of the patented device and includes a cutter for cutting the material. The arrangement of the components furthermore is such that it is more adaptable for cutting.
Accordingly, there is provided in accordance with the present invention a guide for use in tracing a path or cutting along such path on a flat planar sheet of material comprising a base plate having - means on one face thereof for retaining the same in position on the surface of said ~heet of material and a pair of longitudinally extending channels disposed transversely to one another in the opposite face; a pair of cam follower members slidably mounted in respective ones of the channels; a longitudinally extending bar having a slot extending in the longitudinal dlrection thereof; means adjustably positioning respective ones of the cam follower members in ~ai~ 910t and pivotally connectin~ the same to said bar and a head assembly secured to said bar at one end ~C~39496 thereof and including means for detachably securing thereto an element engageable with the surface of the sheet of material on which the base is mounted.
The invention is illustrated by way of example with reference to the accompanying drawings wherein:
Figure 1 is an oblique view of one embodiment of a guide constructed in accordance with the present invention and having a cutting member attached thereto;
Figures 2 and 3 are oblique views of a portion of the guide with parts detached therefrom;
Figure 4 is a cross-sectional view taken along section 4-4 of Figure l;
Figure 5 is an oblique view of the guide illustrated in Figure 1 but with a router tool attached thereto;
Figure 6 is an oblique view of the device illustrated in Figure S but with the router tool detached from the guide;
Figure 7 is an oblique view of another embodiment of a.guide provided in accordance with the present in~ention;
Figure 8 is ~imilar to Figure 7 but illustrating the cutter head detached from the guide; and Figure 9 is an oblique view of a portion of the bar and an attachment therefor adapting the same for use in tracing or cutting a circle.
Referring now in detail to the drawings, shown in Figure 1 is a tool gulde 10 consisting of a base 20, a bar 30 having a cutter head 40 attached to one end thereof and a pair of slides 50 adjustably attached to the bar 30. During use of the device the guides slide in channels in the upper surface of the base causing thq cutter head to follow a particular path when the arm is rotated in a plane parallel to the surface on which the base rests.
The base 20 is a rigid planar member having longitudinally extending grooves or channels 21 and 22 in the upper surface thereof.
- 2 -~)39496 The channels are disposed transverse to one another and they are rectangular in cross-sectional shape as can be seen from Figure 2.
The channels, however, may be dovetail-shaped in cross-section facilitating retaining the guide members therein.
During use of the guide the base 20 is placed on the upper surface of a flat planar sheet of material to be marked or cut and to retain the same in position the lower face of the base is provided with a plurality of pins 23 projecting from the face opposite to the face on which the channels are located. Two pins are illustrated in ~igure 2 and with reference to Figure 1 the pins are located on each of four quadrants of the base defined by arms projecting outwardly from the center. Obviously, any number of pins may be provided, the main requisite being that the base is held securely in position during use of the guide. The pins~ however, mar the surface of the material and in the event one wishes to use the portion of the material lying within the outline configuration of the base, other means may be used for holding the base in position, for example, the lower face of the base may be provided with a double-faced tape or suction cups. The latter is particularly suitable when the device is used for cutting sheets of glass or plastics material.
The bar 30 is a rigid member made of wood~ metal or a rigid plastics material. The bar is a longitudinally extending member having a central, longitudinally extending slot 31. The lower face of the bar has a groove 32 that is wider in width than the slot 31 and provides a seat for receiving a portion of the slide members 50 to be described in detail hereinafter. One end of the bar 30 has a centrally located notch 33 and a pair of apertures 34 for respectively locating and securing a further bar thereto as will be described hereinafter with reference to Figures 7 and 8. The opposite end of the bar is provided with a flange member 35 having a threaded aperture 36 for receiving a thumb screw and a recess 37 for receiving a centering or locating pin.
The bar 30 further includes a longitudinally extending groove 38 on ~L~39496 the upper surface adjacent one marginal edge, the purpose of which will be described hereinafter with reference to the embodiment illustrated in Figures 7 and 8.
The cutter head 40 i~cludes a block-like member 40a made of a rigid material, for example, a plastics material, wood9 metal or the like. An aperture in member 40a rotatably receives a thumb screw 41 adapted to be threaded into the threaded aperture 36 in flange 35 there-by detachably securing the cutter head to the bar 30. An aperture 42 extends longitudinally through member 40a adjacent the lower edge thereof.
A pin 44 having a slot in one end thereof for receiving a cutting blade 45 passes through the aperture 42 and the opposite end has a finger grip nut 46 threaded thereon. Adjustment of the nut permits selectively removing and clamping the blade 45 on the member 40a. The block member 40a has a further aperture 47 extending therethrough transverse to the aperture 42. The aperture 47 is provided for receiving a marking member or the handle of a glass cutter, either of which can be clamped in position by having the handle portion thereof pass through an aperture 48 in pin 44.
In the embodiment illustrated in Figure 2 the slot, recelving blade 45, is shown as extending in a direction parallel to the length of the pin 44. When cutting a circle or oval, the knife blade may be perpendicular to the plane of the sheet of material being cut or at an angle thereto. By rotating the pin 44 in member 40a the knife may be positioned at various different angles permitting cutting the material on a bevel. However, for effecting a bevel cut with the cutter as illustrated in Figure 7 it will be necessary to provlde pins 44 with a slot for receiving the knife blade disposed at an angle to the longitudinal axis of the pin rather than perpendicular thereto as illustrated in Figure 7.
Each slide 50 consists of a slide block or cam follower 51 appropriately shaped to slidably fit in respective ones of channels 21 and 22 of the base. A plate 53 is pivotally mounted on each slide ~L6)39496 block 51 and so dimensioned as to fit into the slot 32 in the lower face of bar 30. A threaded aperture 54, surrounded by a sleeve 56 which projects upwardly from the plate 53 into the slot 31 of bar 30, receives a thumb screw 55. The thumb screw is provided with a lower - flat face 57 and together with plate 53 clampingly engages opposite faces of the bar 30. Loosening of the thumb screws permits sliding members 50 longitudinally along the bar to a desired selected position after which it is clamped thereon. The members 51 of the respective pair of slides 50 are located in respective ones of the grooves or channels 21 and 22 in the base and the relative positioning of the two members 50 with respect to one another and the distance from the cutter head 40 determines the path traced out by the cutter head when the bar 30 is rotated.
The type of cutter mounted on the cutter head 40 will be dependent upon the type of material to be cut and is readily replaceable to facilitate re-sharpening or substitution of cutter blades to always ensure a sharp edge for cutting purposes.
To cut an oval mat ~or picture framing from paper board stock, the assembly illustrated in Figure 1 is placed on the material and the pair of slides 50 appropriately positioned determining the shape and size of oval to be cut. The center portion of the stock material is ; normally discarded and accordingly the previously described impallng pins 23 may be utilized to secure the guide in position holding the same while the bar 30 is caused to rotate. In the event the portion of stock of material, on which the base 20 is mounted, is to be utilized the previously described suction cups or double-faced tape may be used.
In Figure S there is illustrated a power driven router tool 60 attached by a unting bracket 70 to the bar 30 and which is located at the end thereof opposite to that of the cutter head 40. The mounting bracket 70 consists of an angle member having flanges 71 and 72 at right angles to one another. Flange 71 has a pair of apertures ~J139~96 corresponding to apertures 34 in the bar 30 and receive respective ones of a pair of bolt and nut assemblies 73 detachably securing the bracket to the bar 30. The flange 72 has a slot 74 extending inwardly from the free edge thereof and which receives the stem of a stud 75 threaded into a bracket 76 attached to the router 60.
In the embodiments illustrated in Figures 7 and 8 the bar 30 described with reference to Figure 1 has a bar 80 detachably secured thereto by bolt and nut assemblies 81. Bars 30 and 80 are disposed transversely to one another providing effectively a T-square. The notch 33 in the end of bar 30 receives a block or pro;ection on bar 80 - providing a centering device and together with the bolt and nut assemblies 81 passing through apertures 34 ensures bars 30 and 80 are at right angles to one another. The bar 80 fits flatwise on the underface of bar 30 thereby providing a straight edge 82 for engaging the side edge of a sheet of material to be cut. The cutting head 40 previously described with reference to Figure 2 is detachably secured by the wing nut 41 to a backing plate 49, the lower edge of which is slidably mounted in groove 38 of bar 30. The lower edge portion may be notched locating a face of the backing plate 49 closely adjacent the longitudinal edge of bar 30. The tolerances however are such that there is normally a slight space between the face of backing plate 49 and the adjacen~ face of member 40a so that by adjusting thumb screw 41 a tight sliding fit is main-tained between the cutter head and the bar 30. This is desirable when using the cutter head to slide longitudinal~y along the bar 30 and effecting a cut parallel to such bar. In this instance a knife holder of the type illustrated in Figure 2 is utilized. In making a cut transverse to the length of the bar 30 wing nut 41 is utilized to clamp the cutter head on the bar and the entire assembly then slides along the sheet using edge 82 as a guide by engaging the edge of the Material being cut. For this the knife blade 45 ls located in a slot 49 in the pin Member 44 which is disposed transverse to the longitudinal axis of the pin.
~39~96 In Figure 9 there is illustrated a further embodiment wherein the bar illustrated in Figures 1 and 2 and having a cutting head attached thereto as illustrated in Figure 2 may be used for cutting or tracing a circle. Referring to Figure 9 there is illustrated an attach-ment 90 consisting of a plate 91 adapted to fit in recess 32 of bar 30 and having an upwardly directed protrusion 92 which projects into the slot 31 of bar 30. Plate 91 has a threaded aperture 93 for receiving a finger grip screw 94 clampingly attaching plate 91 to the bar 30. ~ixed to the bar 91 and projecting downwardly therefrom is a needle-like or centering pin member 95 for impaling the surface of the material on which -the bar is used defining the center of rotation for the cutter bar 30 when used to cut a circle from the sheet material. In the event the portion of the sheet material on which the centering device is mounted is to be used, pin 95 may be replaced by a suction cup journalled for rotation on the plate 91. This prevents marring the surface of the material.
; ~rom the foregoing it will be seen there is provided a guide adapted to many uses and which is simple in construction and thus relatively inex~ensive to produce. It may be used to cut mat board, glass, wood, plastics and other materials and the cutter may be either a knife blade or a router bit. The guide may be used to cut a circle, rectangle, square or oval pattern and one of the main advantages is the fact that it has unlimited size potential. The unit itself is compact and the oval mat cutter can cut an oval anywhere from a circle to a slim line oval merely by ad~ustment of the two slide or cam plates.
The entire unit is designed to be readily assembled and disassembled.
The base 20 and bar 30 are relatively thin thus placing the cutter head closely adjacent the material to be cut mlnimizing forces which would tend to shift the assembly during a cutting operation and thus rendering it easy in use to maintain the guide in its desired exact location.
:~39496 In the ~oregoing, the base plate ~s described as having two channels disposed at ~ight angles to one another and in which are slidably mounted respective ones of a pair of cam follower members.
Obviously various alternative structures may be provided to perform the function of the channel and guide follower. For example, the channels in the base may be replaced by ribs projecting upwardly from the base plate and intersecting one ànother at right angles. Cam followers may be mounted slidably on respective ones of the transversely disposed ribs and the latter modified adjacent their intersection to permit a cam follower slidably mounted on one of the ribs to bypass the other rib. The ribs may be a bar-like member attached to or protruding up-wardly from the base and the cross-sectional shape may be such as to retain the cam followers thereon permitting only sliding movement of the cam follower on the rib associated therewith.
The channels, however, may be dovetail-shaped in cross-section facilitating retaining the guide members therein.
During use of the guide the base 20 is placed on the upper surface of a flat planar sheet of material to be marked or cut and to retain the same in position the lower face of the base is provided with a plurality of pins 23 projecting from the face opposite to the face on which the channels are located. Two pins are illustrated in ~igure 2 and with reference to Figure 1 the pins are located on each of four quadrants of the base defined by arms projecting outwardly from the center. Obviously, any number of pins may be provided, the main requisite being that the base is held securely in position during use of the guide. The pins~ however, mar the surface of the material and in the event one wishes to use the portion of the material lying within the outline configuration of the base, other means may be used for holding the base in position, for example, the lower face of the base may be provided with a double-faced tape or suction cups. The latter is particularly suitable when the device is used for cutting sheets of glass or plastics material.
The bar 30 is a rigid member made of wood~ metal or a rigid plastics material. The bar is a longitudinally extending member having a central, longitudinally extending slot 31. The lower face of the bar has a groove 32 that is wider in width than the slot 31 and provides a seat for receiving a portion of the slide members 50 to be described in detail hereinafter. One end of the bar 30 has a centrally located notch 33 and a pair of apertures 34 for respectively locating and securing a further bar thereto as will be described hereinafter with reference to Figures 7 and 8. The opposite end of the bar is provided with a flange member 35 having a threaded aperture 36 for receiving a thumb screw and a recess 37 for receiving a centering or locating pin.
The bar 30 further includes a longitudinally extending groove 38 on ~L~39496 the upper surface adjacent one marginal edge, the purpose of which will be described hereinafter with reference to the embodiment illustrated in Figures 7 and 8.
The cutter head 40 i~cludes a block-like member 40a made of a rigid material, for example, a plastics material, wood9 metal or the like. An aperture in member 40a rotatably receives a thumb screw 41 adapted to be threaded into the threaded aperture 36 in flange 35 there-by detachably securing the cutter head to the bar 30. An aperture 42 extends longitudinally through member 40a adjacent the lower edge thereof.
A pin 44 having a slot in one end thereof for receiving a cutting blade 45 passes through the aperture 42 and the opposite end has a finger grip nut 46 threaded thereon. Adjustment of the nut permits selectively removing and clamping the blade 45 on the member 40a. The block member 40a has a further aperture 47 extending therethrough transverse to the aperture 42. The aperture 47 is provided for receiving a marking member or the handle of a glass cutter, either of which can be clamped in position by having the handle portion thereof pass through an aperture 48 in pin 44.
In the embodiment illustrated in Figure 2 the slot, recelving blade 45, is shown as extending in a direction parallel to the length of the pin 44. When cutting a circle or oval, the knife blade may be perpendicular to the plane of the sheet of material being cut or at an angle thereto. By rotating the pin 44 in member 40a the knife may be positioned at various different angles permitting cutting the material on a bevel. However, for effecting a bevel cut with the cutter as illustrated in Figure 7 it will be necessary to provlde pins 44 with a slot for receiving the knife blade disposed at an angle to the longitudinal axis of the pin rather than perpendicular thereto as illustrated in Figure 7.
Each slide 50 consists of a slide block or cam follower 51 appropriately shaped to slidably fit in respective ones of channels 21 and 22 of the base. A plate 53 is pivotally mounted on each slide ~L6)39496 block 51 and so dimensioned as to fit into the slot 32 in the lower face of bar 30. A threaded aperture 54, surrounded by a sleeve 56 which projects upwardly from the plate 53 into the slot 31 of bar 30, receives a thumb screw 55. The thumb screw is provided with a lower - flat face 57 and together with plate 53 clampingly engages opposite faces of the bar 30. Loosening of the thumb screws permits sliding members 50 longitudinally along the bar to a desired selected position after which it is clamped thereon. The members 51 of the respective pair of slides 50 are located in respective ones of the grooves or channels 21 and 22 in the base and the relative positioning of the two members 50 with respect to one another and the distance from the cutter head 40 determines the path traced out by the cutter head when the bar 30 is rotated.
The type of cutter mounted on the cutter head 40 will be dependent upon the type of material to be cut and is readily replaceable to facilitate re-sharpening or substitution of cutter blades to always ensure a sharp edge for cutting purposes.
To cut an oval mat ~or picture framing from paper board stock, the assembly illustrated in Figure 1 is placed on the material and the pair of slides 50 appropriately positioned determining the shape and size of oval to be cut. The center portion of the stock material is ; normally discarded and accordingly the previously described impallng pins 23 may be utilized to secure the guide in position holding the same while the bar 30 is caused to rotate. In the event the portion of stock of material, on which the base 20 is mounted, is to be utilized the previously described suction cups or double-faced tape may be used.
In Figure S there is illustrated a power driven router tool 60 attached by a unting bracket 70 to the bar 30 and which is located at the end thereof opposite to that of the cutter head 40. The mounting bracket 70 consists of an angle member having flanges 71 and 72 at right angles to one another. Flange 71 has a pair of apertures ~J139~96 corresponding to apertures 34 in the bar 30 and receive respective ones of a pair of bolt and nut assemblies 73 detachably securing the bracket to the bar 30. The flange 72 has a slot 74 extending inwardly from the free edge thereof and which receives the stem of a stud 75 threaded into a bracket 76 attached to the router 60.
In the embodiments illustrated in Figures 7 and 8 the bar 30 described with reference to Figure 1 has a bar 80 detachably secured thereto by bolt and nut assemblies 81. Bars 30 and 80 are disposed transversely to one another providing effectively a T-square. The notch 33 in the end of bar 30 receives a block or pro;ection on bar 80 - providing a centering device and together with the bolt and nut assemblies 81 passing through apertures 34 ensures bars 30 and 80 are at right angles to one another. The bar 80 fits flatwise on the underface of bar 30 thereby providing a straight edge 82 for engaging the side edge of a sheet of material to be cut. The cutting head 40 previously described with reference to Figure 2 is detachably secured by the wing nut 41 to a backing plate 49, the lower edge of which is slidably mounted in groove 38 of bar 30. The lower edge portion may be notched locating a face of the backing plate 49 closely adjacent the longitudinal edge of bar 30. The tolerances however are such that there is normally a slight space between the face of backing plate 49 and the adjacen~ face of member 40a so that by adjusting thumb screw 41 a tight sliding fit is main-tained between the cutter head and the bar 30. This is desirable when using the cutter head to slide longitudinal~y along the bar 30 and effecting a cut parallel to such bar. In this instance a knife holder of the type illustrated in Figure 2 is utilized. In making a cut transverse to the length of the bar 30 wing nut 41 is utilized to clamp the cutter head on the bar and the entire assembly then slides along the sheet using edge 82 as a guide by engaging the edge of the Material being cut. For this the knife blade 45 ls located in a slot 49 in the pin Member 44 which is disposed transverse to the longitudinal axis of the pin.
~39~96 In Figure 9 there is illustrated a further embodiment wherein the bar illustrated in Figures 1 and 2 and having a cutting head attached thereto as illustrated in Figure 2 may be used for cutting or tracing a circle. Referring to Figure 9 there is illustrated an attach-ment 90 consisting of a plate 91 adapted to fit in recess 32 of bar 30 and having an upwardly directed protrusion 92 which projects into the slot 31 of bar 30. Plate 91 has a threaded aperture 93 for receiving a finger grip screw 94 clampingly attaching plate 91 to the bar 30. ~ixed to the bar 91 and projecting downwardly therefrom is a needle-like or centering pin member 95 for impaling the surface of the material on which -the bar is used defining the center of rotation for the cutter bar 30 when used to cut a circle from the sheet material. In the event the portion of the sheet material on which the centering device is mounted is to be used, pin 95 may be replaced by a suction cup journalled for rotation on the plate 91. This prevents marring the surface of the material.
; ~rom the foregoing it will be seen there is provided a guide adapted to many uses and which is simple in construction and thus relatively inex~ensive to produce. It may be used to cut mat board, glass, wood, plastics and other materials and the cutter may be either a knife blade or a router bit. The guide may be used to cut a circle, rectangle, square or oval pattern and one of the main advantages is the fact that it has unlimited size potential. The unit itself is compact and the oval mat cutter can cut an oval anywhere from a circle to a slim line oval merely by ad~ustment of the two slide or cam plates.
The entire unit is designed to be readily assembled and disassembled.
The base 20 and bar 30 are relatively thin thus placing the cutter head closely adjacent the material to be cut mlnimizing forces which would tend to shift the assembly during a cutting operation and thus rendering it easy in use to maintain the guide in its desired exact location.
:~39496 In the ~oregoing, the base plate ~s described as having two channels disposed at ~ight angles to one another and in which are slidably mounted respective ones of a pair of cam follower members.
Obviously various alternative structures may be provided to perform the function of the channel and guide follower. For example, the channels in the base may be replaced by ribs projecting upwardly from the base plate and intersecting one ànother at right angles. Cam followers may be mounted slidably on respective ones of the transversely disposed ribs and the latter modified adjacent their intersection to permit a cam follower slidably mounted on one of the ribs to bypass the other rib. The ribs may be a bar-like member attached to or protruding up-wardly from the base and the cross-sectional shape may be such as to retain the cam followers thereon permitting only sliding movement of the cam follower on the rib associated therewith.
Claims (12)
1. A guide for use in tracing a path, or cutting along such path, on a flat, planar sheet of material comprising: a base plate having means on one face thereof for retaining the same in position on the surface of said sheet of material and a pair of longitudinally extending channels disposed transversely to one another in the opposite face; a pair of cam follower members slidably mounted in respective ones of the channels; a longitudinally extending bar having a slot extending in the longitudinal direction thereof; means adjustably positioning respective ones of the cam follower members in said slot and pivotally connecting the same to said bar and a head assembly secured to said bar at one end hereof and including means for detachably securing thereto an element engageable with the surface of the sheet of material on which the base is mounted.
2. An apparatus as defined in claim 1 wherein said means for retaining the base on the sheet of material comprises two or more pins secured to the base and projecting from said one face for impaling the surface of the sheet of material.
3. An apparatus as defined in claim 1 wherein said means for retaining the base plate on the sheet of material comprises double-faced tape adhesively attached to said one face of the base plate.
4. An apparatus as defined in claim 1 wherein said means for retaining the base plate on the sheet of material comprises at least one suction cup secured to the base plate and located on said one face thereof.
5. An apparatus as defined in claims 1, 2 or 3 wherein said longitudinally extending bar has a channel-like recess in one face thereof extending longitudinally along and contiguous with at least one edge of said longitudinally extending slot.
6. An apparatus as defined in claims 1, 2 or 3 wherein each of said pair of cam follower members comprises a first member slidably mounted in the channel in the base and a second plate-like member pivot-ally attached to said first member for swinging movement in a plane parallel to the plane of said opposite face of the base plate.
7. An apparatus as defined in claim 1 wherein said bar has a channel in one face thereof extending along and contiguous with said longitudinally extending slot and wherein each of said cam followers comprise a first member slidably disposed in the channel of the base plate and a plate-like member pivotally attached to said first member, said plate-like member being slidably disposed in the channel in the face of the bar and further including means for selectively clamping the plate-like members of the cam followers to said bar.
8. An apparatus as defined in claim 7 wherein said clamping means comprise a thumb screw means threaded into respective ones of said plate-like members.
9. An apparatus as defined in claims 1 wherein said head assembly includes a flange secured to and projecting upwardly from the longitudinally extending bar at one end thereof and a block-like member detachably secured to said flange, said block-like member having a tool holder adjustably mounted thereon.
10. An apparatus as defined in claim 9 wherein said tool holder comprises a pin-like member adjustably mounted on said block-like member for clampingly retaining a cutting tool thereon.
11. An apparatus as defined in claims 1 or 7 wherein the channels in the base plate are substantially dovetail in cross-section and wherein a portion of the cam follower members slidably mounted therein are of correspondingly mating shape and thereby retained in the channels to hold the apparatus in assembled relation.
12. A tool guide comprising:
(a) a base plate having means on one face thereof for retaining the same on the surface of a sheet of material and a pair of longitudinally extending guide tracks disposed transversely to one another on the opposite face;
(b) a pair of cam follower members slidably mounted on respective ones of said guide tracks;
(c) a longitudinally extending bar;
(d) means pivotally connecting respective ones of said cam followers to said bar at positions spaced longi-tudinally therealong and for adjustably positioning the same at various positions longitudinally along the bar.
(a) a base plate having means on one face thereof for retaining the same on the surface of a sheet of material and a pair of longitudinally extending guide tracks disposed transversely to one another on the opposite face;
(b) a pair of cam follower members slidably mounted on respective ones of said guide tracks;
(c) a longitudinally extending bar;
(d) means pivotally connecting respective ones of said cam followers to said bar at positions spaced longi-tudinally therealong and for adjustably positioning the same at various positions longitudinally along the bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA220,968A CA1039496A (en) | 1975-02-28 | 1975-02-28 | Tool guide for tracing or cutting shapes from sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA220,968A CA1039496A (en) | 1975-02-28 | 1975-02-28 | Tool guide for tracing or cutting shapes from sheets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039496A true CA1039496A (en) | 1978-10-03 |
Family
ID=4102387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA220,968A Expired CA1039496A (en) | 1975-02-28 | 1975-02-28 | Tool guide for tracing or cutting shapes from sheets |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1039496A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0013683A1 (en) * | 1979-01-23 | 1980-08-06 | Istvan Papak | Level-meter marker protractor |
-
1975
- 1975-02-28 CA CA220,968A patent/CA1039496A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0013683A1 (en) * | 1979-01-23 | 1980-08-06 | Istvan Papak | Level-meter marker protractor |
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