US3741064A - Mitre box - Google Patents

Mitre box Download PDF

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Publication number
US3741064A
US3741064A US3741064DA US3741064A US 3741064 A US3741064 A US 3741064A US 3741064D A US3741064D A US 3741064DA US 3741064 A US3741064 A US 3741064A
Authority
US
United States
Prior art keywords
mitre
box
set forth
supporting members
guiding
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 - Lifetime
Application number
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English (en)
Inventor
A Quenot
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.)
MFG QUENOT MABO
Original Assignee
MFG QUENOT MABO
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
Priority claimed from FR7025902A external-priority patent/FR2097586A5/fr
Priority claimed from FR7101873A external-priority patent/FR2122083A6/fr
Application filed by MFG QUENOT MABO filed Critical MFG QUENOT MABO
Application granted granted Critical
Publication of US3741064A publication Critical patent/US3741064A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G5/00—Machines or devices for working mitre joints with even abutting ends
    • B27G5/02—Machines or devices for working mitre joints with even abutting ends for sawing mitre joints; Mitre boxes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/687—By tool reciprocable along elongated edge
    • Y10T83/6905—With tool in-feed
    • Y10T83/6945—With passive means to guide tool directly
    • Y10T83/695—By plural opposed guide surfaces
    • Y10T83/696—With relative adjustment between guide and work or work-support
    • Y10T83/6975—By rotation about an axis perpendicular to the work-support surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/849—With signal, scale, or indicator
    • Y10T83/853—Indicates tool position
    • Y10T83/855—Relative to another element
    • Y10T83/856—To work-engaging member
    • Y10T83/857—Calibrated scale or indicator

Definitions

  • a longitudinal guide member [52] US. Cl. 83/767, 83/522 is pivotally mounted to said platforms for guiding a [51] Int. Cl. B27g 5/02 workpiece.
  • a protractor is provided for adjusting the Field of Search 89 angular position of the platforms in relation, to a fixed 522 reference mark carried by said base plate, and means are provided for locking the platforms in a selected an- [5 6] References Cited la position.
  • the present invention relates in'general to mitreboxes of the type currently used by carpenters for joinery works, etc., for cutting according to predetermined angles the ends of pieces such as boards, sections, moldings, borders, etc.
  • mitre-boxes consist very simply of a pair of parallel spaced side walls interconnected by a base or distance-piece to constitute a guide channel for receiving the piece to be cut. At one end these side walls comprise registering vertical slits so disposed that the blade of the cutting tool, for instance a saw, is properly guided in an angular position in relation to a flat face of the piece to be cut which abutes or is wedged against one of said side walls.
  • a mitrebox comprising a base plate and at least one longitudinal member for guiding a piece to be cut, said longitudinal member being pivotally supported by a pair of rotatable supporting members mounted on the top of said base plate and of which at least one'is provided with means for guiding a cutting tool, said members being also provided with means for indicating the angle between said one supporting member and said longitudinal member, and means for locking said supporting members in a selected angular position.
  • said guide means consist of at least two slits each formed by the gap left between a pair of rollers rotating freely on metal or plastic pins or shafts.
  • These rollers provide a substantial improvement over the prior art, notably in that they permit the manufacture of long-lasting mitreboxes.
  • these rollers can rotate freely they facilitate greatly the movement of the cutting tool or saw, as their frictional resistance is reduced substantially to zero.
  • they can be replaced instantaneously by simply substituting the plastic sleeves revolving about the shafts or pins.
  • FIG. 1 is an isometric view of a mitre-box according to the present invention
  • FIG. 2 illustrates a mechanism for locking and braking the platforms
  • FIG. 3 is a cross-section taken along the line A-A of FIG. 2
  • FIG. 4 is a perspective view of a modified embodiment of mitre-box.
  • a mitre-box comprises a I 7 'pairs of rollers 9.
  • rollers each comprises a detachable sleeve 10 of suitable anti-friction material, such as plastic material, rotating freely about a shaft or pin 11.
  • the rollers 9 are disposed in pairs to provide therebetween a gap sufficient for inserting the blade of the cutting tool, for instance a saw blade.
  • these platforms 4 and 5 comprise in their top face a groove 12 permitting satisfactory completion of a cutting operation.
  • Each platform 4 or 5 further comprises along the edge of its top face alignment means 8 consisting of a vernier l3 movable in relation to a fixed mark or reference line 14 formed in a plate 15.
  • This plate 15 is mounted with its top face level with the top faces of platforms 4, 5 and forms therewith a substantially continuous flat surface.
  • the plate 15 together with the base plate 1 have slideways and recesses formed in their exposed and concealed faces to permit the mounting of locking and braking means controlled by members 16 and 17, respectively, as will be explained presently.
  • FIG. 2 showing partly in horizontal section, and partly in plan view from above, the mitrebox of FIG. 1, from which the top plate 15 and the longitudinal member 6 have been removed for the sake of clarity.
  • the above-mentioned member 16 consists of a screw having a milled head and engaged in a tapped hole formed in an up-turned ledge 18 of base plate 1. This screw 16 is adapted to control the position of a brake shoe l9 engaging the platforms 4 and 5, for locking same in any selected angular position.
  • the member 17 engaging the slideways formed in plate 15 is adapted to control a device for locking said platforms 4 and 5. Now it is clear that this locking device cannot operate in conjunction or simultaneously with the aforesaid braking means.
  • the member 17 is of flat, elongated configuration, and comprises at its end adjacent to said screw 16 an aperture 20 of substantially trapezoidal configuration.
  • this trapezoidal aperture 20 constitute a pair of opposite cam faces 21 adapted to actuate locking members 22 guided in a groove 23 formed in the base plate (FIG. 3).
  • these locking members 22 are formed with a twin-faced bevelled inner projection 24.
  • these members 22 are urged to their locking position with respect to platforms 4 and by a spring 25.
  • the substantially trapezoidal aperture 20 comprises adjacent its minor base V-shaped notches 26 corresponding in shape to the bevelledend projections 24 of locking members 22.
  • control member 17 When it is desired to release the platforms 4, 5 the control member 17 is moved in the direction of the arrow by pulling the end 27 of this control member 17, whereby the cam faces 21 engage one of the bevelled end projections 24 and move the locking members 22 towards each other.
  • the angular spacing of these notches 29 may preferably be such that each of them corresponds to an angle of five degrees, so that the instrument can easily be set to any angular position constituting a multiple of 5.
  • the member 17 is actuated in the direction of the arrow (FIG. 2) so that the bevelled faces of end projections 24 engage the notches 26 of said control member 17. Then the adjustment is made by using the brake shoes 19 as already explained hereinabove.
  • a groove 31 is formed in the underface of base plate 1 and adapted to receive a longitudinal rule 30 which can project from the base plate 1 (see FIGS. 2 and 3).
  • the rule 30 when the mitre-box is laid on a flat surface, the rule 30 will recede into its groove 31 due to the pressure exerted by the weight of the mitrebox. However, if it is desired to hold the mitre-box against a vertical face of a table or work bench the rule 30 can be projected to abut the face of the table or workbench. This will greatly facilitate the cutting operation since it permits holding of the mitre-box and the work piece against undesired movement.
  • the mitre-box of this invention constitutes a substantial improvement over hitherto known instruments of this character, since it comprises pairs of saw-guiding rollers 9 on each platform 4, 5, thus enabling both right-handed and left-handed persons to use the instrument with the same ease.
  • the platforms 4, 5 of the preceding structure are replaced by a pair of arms 32 provided at their ends with means for pivotally mounting thereon the ends of a pair of longitudinal members 6.
  • One arm 32 comprises means for guiding the cutting tool or blade and a part-circular protractor or vemier for reading the adjustment angle.
  • This protractor or vernier is associated with a notch 33 cut in an insert plate secured to base plate 1 and permitting locking of the arms 32 in a well-defined angular position with the assistance of a spring-loaded, pistonlike locking member 34.
  • a mitre-box comprising: a base plate; at least one longitudinal member for guiding a piece to be cut; a pair of rotatable supporting members pivotally supporting said longitudinal member and each mounted on the top of said base plate; means on at least one of said supporting members for guiding a cutting tool; means on said supporting members for indicating the angle between one supporting member and said longitudinal member; and means for locking said supporting members in a selected angular position.
  • a mitre-box as set forth in claim 1, wherein said means for guiding a cutting tool consists of a plurality of pairs of rollers, the rollers of each pair being spaced to ensure a reliable guiding action.
  • a mitre-box as set forth in claim 1, wherein said means for indicating the angle between one supporting member and said longitduinal member comprises a fixed reference mark and a protractor bearing graduation lines movable past said fixed reference mark.
  • said locking means consist of cylindrical peripheral wall portions of said platforms, brake shoes engageable with said cylindrical peripheral walls, and a screw for controlling the engagement of said brake shoes with said cylindrical peripheral walls.
  • said locking means consist of means defining notches in the periphery of said supporting members, and movable members engageable in said notches.
  • a mitre-box as set forth in claim 8 including means for actuating said movable members comprising 10.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Turning (AREA)
  • Details Of Cutting Devices (AREA)
  • Making Paper Articles (AREA)
US3741064D 1970-07-10 1971-06-29 Mitre box Expired - Lifetime US3741064A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7025902A FR2097586A5 (enExample) 1970-07-10 1970-07-10
FR7101873A FR2122083A6 (enExample) 1971-01-14 1971-01-14

Publications (1)

Publication Number Publication Date
US3741064A true US3741064A (en) 1973-06-26

Family

ID=26215846

Family Applications (1)

Application Number Title Priority Date Filing Date
US3741064D Expired - Lifetime US3741064A (en) 1970-07-10 1971-06-29 Mitre box

Country Status (6)

Country Link
US (1) US3741064A (enExample)
JP (1) JPS5018640B1 (enExample)
CH (1) CH544632A (enExample)
DE (1) DE7125497U (enExample)
GB (1) GB1307164A (enExample)
IT (1) IT945918B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533856A1 (fr) * 1982-10-04 1984-04-06 Rapayelian Christian Dispositif de guide-lame pour boite a onglets ou similaires
EP0172555A3 (en) * 1984-08-22 1986-05-28 Bessey & Sohn Gmbh. & Co. Etau
US4685369A (en) * 1985-08-14 1987-08-11 Beamer Ralph R Portable miter device for chain and hand saws
EP0674962A1 (de) * 1994-03-31 1995-10-04 Schefe, Ines Vorrichtung zum Ablängen von Hohlprofilen

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156271B (en) * 1984-03-12 1987-03-11 Wickes Building Supplies Limit Mitre block
GB8413014D0 (en) * 1984-05-22 1984-06-27 Copydex Plc Locating workpiece
GB2339478A (en) * 1998-07-13 2000-01-26 Steven Thomas Eaves Coving mitre cutting guide
GB2429426A (en) * 2005-08-24 2007-02-28 Alan James Powell Adjustable holding device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2533856A1 (fr) * 1982-10-04 1984-04-06 Rapayelian Christian Dispositif de guide-lame pour boite a onglets ou similaires
EP0172555A3 (en) * 1984-08-22 1986-05-28 Bessey & Sohn Gmbh. & Co. Etau
US4685369A (en) * 1985-08-14 1987-08-11 Beamer Ralph R Portable miter device for chain and hand saws
EP0674962A1 (de) * 1994-03-31 1995-10-04 Schefe, Ines Vorrichtung zum Ablängen von Hohlprofilen

Also Published As

Publication number Publication date
IT945918B (it) 1973-05-10
CH544632A (fr) 1973-11-30
DE7125497U (de) 1975-10-09
JPS5018640B1 (enExample) 1975-07-01
DE2133031A1 (de) 1972-02-10
DE2133031B2 (de) 1977-02-03
GB1307164A (en) 1973-02-14

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