US2463024A - Hand tool for cutting circular openings - Google Patents

Hand tool for cutting circular openings Download PDF

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Publication number
US2463024A
US2463024A US727770A US72777047A US2463024A US 2463024 A US2463024 A US 2463024A US 727770 A US727770 A US 727770A US 72777047 A US72777047 A US 72777047A US 2463024 A US2463024 A US 2463024A
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United States
Prior art keywords
circular openings
shank
cutting
hand tool
arm
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Expired - Lifetime
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US727770A
Inventor
Monte Jacques D Del
Pappas George
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Individual
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Individual
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Priority to US727770A priority Critical patent/US2463024A/en
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Publication of US2463024A publication Critical patent/US2463024A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/05—Drills for trepanning for cutting discs from sheet
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/86—Tool-support with means to permit positioning of the Tool relative to support
    • Y10T408/885—Tool-support with means to permit positioning of the Tool relative to support including tool-holding clamp and clamp actuator
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/892—Tool or Tool with support with work-engaging structure detachable from cutting edge
    • Y10T408/8923—Removable central lead

Definitions

  • the invention has in View a hand tool of said character which is adapted to out true circular openings having neat and sharp peripheral edges arranged at right angles to the surface of the mounting.
  • Another object of the invention is the provision of a cutting blade which is vertically adjustable for cutting openings of different depth or through varying thickness of mountings and which is readily adjustable for cutting openings of varying sizes.
  • Another object of the invention is the provision of a shank having a hand engaging means for steadying and holding the tool in upright relation and a hand engaging means for turning the tool for producing circular openings.
  • Fig. l is a view in elevation of a hand tool for cutting circular openings constructed in accordance with the invention.
  • Fig. 2. is a fragmentary perspective view thereof shown in position on a mounting.
  • Fig. 3 is a perspective view of the adjustable arm with the blade shown in dotted outline in position therein.
  • Fig. 4 is a transverse sectional view taken approximately online 4-l of Fig. 1.
  • Fig. 5 is an enlarged view of the cutting blade.
  • the tool includes a shank lllhaving an enlarged rounded upper end H which forms a handle member adapted to be grasped in one hand of the operator for rotating the shank.
  • a handle member I l Adjacent the handle member I l the shank is provided with a circumferentially extending groove or recess l2 in which is freely arranged a ring or band l3 adapted to be grasped between the thumb and finger of the other hand of the operator for steadying the shank and for holding the same in upright relation as the shank is rotated.
  • the shank Ill is provided with a center pin i l secured in a centrally located bore [5 in the lower end portion thereof and arranged with the outer end of the pin protruding therefrom and formed with a point or sharpened extremity l6 adapted for engagement in the mounting to thereby form the center or axis about which the tool is rotated in cutting the circular openings.
  • an arm I! is provided which is slidably fitted in a horizontally extending opening IS in the shank adjacent the pin M to thereby dispose the arm [1 in horizontal alignment with the mounting and projecting radially outwardly from the shank l0 when the same is arranged in vertical relation for forming the circular openings.
  • the arm I! is formed with a fiat vertical face H! on one side thereof which is adapted to be engaged by a tightening elementzllthreadedly engaged in an opening 2
  • a cutter blade 23 Extending downwardly through the outer. end of the arm I! is a cutter blade 23 formed with a downwardly and rearwardly curved cutting edge 24 which terminates in a point 25 at the rear edge of the cutter blade.
  • the cutter blade is adapted to be secured in the opening 22 by means of a securing element 26 threadedly engaged in an opening 21 in the end of the arm IT and which is adapted to be loosened for adjusting the cutter element 23 for varying the length of the blade below the lower end l6 of the center pin M for cutting circular openings through different thicknesses of mounting.
  • the center pin I4 is releasably secured in the bore l5 by means of a stud or screw 28 engaging in a threaded opening in the shank Hi.
  • the band I3 is grasped between the thumb and finger of one hand of the operator for steadying the shank l0 and holding the same in vertical relation while the handle member H is grasped by the other hand of the operator for turning the shank together with the arm and cutter blade 23.
  • the handle member is made relatively large to facilitate turning of the tool and while the same is turned the band [3 is held stationary or against rotation by the operator.
  • a shank having an enlarged upper end defining the tool in upright relation, a center pin having 4 having a forwardly disposed downwardly and rearwardly curved cutting edge terminating in a pointed extremity and means adjustably securing said arm in the opening in said shank for varying the elfective, length of the shank for outting circular openings of different sizes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)

Description

March 1, 1949.
J. D. DEL MONTE ET AL HAND TOOL FOR CUTTING CIRCULAR OPENINGS Filed Feb. 11, 1947 A T TORNE VS Patented Mar. 1, 1949 UNITED HAND TOOL FOR CUTTING CIRCULAR,
OPENINGS Jacques D. Del Monte andGeorge Palppas, New York, N. Y.
Application February 11, 1947, Serial No. 727.770
1Claim. (Cl. 30-310) This invention relates to devices for cutting circular openings and while not limited thereto the same has particular reference to a hand tool for cutting circular openings in mountings for receiving coins and the like.
The invention has in View a hand tool of said character which is adapted to out true circular openings having neat and sharp peripheral edges arranged at right angles to the surface of the mounting.
Another object of the invention is the provision of a cutting blade which is vertically adjustable for cutting openings of different depth or through varying thickness of mountings and which is readily adjustable for cutting openings of varying sizes.
Another object of the invention is the provision of a shank having a hand engaging means for steadying and holding the tool in upright relation and a hand engaging means for turning the tool for producing circular openings.
With the foregoing and other objects in view, reference is now made to the following specification and accompanying drawings in which the preferred embodiment of the invention is illustrated.
In the drawings:
Fig. l is a view in elevation of a hand tool for cutting circular openings constructed in accordance with the invention.
Fig. 2. is a fragmentary perspective view thereof shown in position on a mounting.
Fig. 3 is a perspective view of the adjustable arm with the blade shown in dotted outline in position therein.
Fig. 4 is a transverse sectional view taken approximately online 4-l of Fig. 1.
Fig. 5 is an enlarged view of the cutting blade.
Referring to the drawings by characters of reference, the tool includes a shank lllhaving an enlarged rounded upper end H which forms a handle member adapted to be grasped in one hand of the operator for rotating the shank. Adjacent the handle member I l the shank is provided with a circumferentially extending groove or recess l2 in which is freely arranged a ring or band l3 adapted to be grasped between the thumb and finger of the other hand of the operator for steadying the shank and for holding the same in upright relation as the shank is rotated.
The shank Ill is provided with a center pin i l secured in a centrally located bore [5 in the lower end portion thereof and arranged with the outer end of the pin protruding therefrom and formed with a point or sharpened extremity l6 adapted for engagement in the mounting to thereby form the center or axis about which the tool is rotated in cutting the circular openings.
In order to provide means for cutting circular openings of different sizes in mountings for coins and the like and with sharp edges at right angles to the surface of the mounting, an arm I! is provided which is slidably fitted in a horizontally extending opening IS in the shank adjacent the pin M to thereby dispose the arm [1 in horizontal alignment with the mounting and projecting radially outwardly from the shank l0 when the same is arranged in vertical relation for forming the circular openings.
The arm I! is formed with a fiat vertical face H! on one side thereof which is adapted to be engaged by a tightening elementzllthreadedly engaged in an opening 2| in the shank Ill for securing the arm I! in position in the opening l8, the tightening element 20 being formed with a socketed outer end adapted to be engaged by a tool for loosening the same so that the arm I! may be adjusted in the opening l8 for varying the eifective length of the arm II for cutting circular openings of difierent sizes.
Extending downwardly through the outer. end of the arm I! is a cutter blade 23 formed with a downwardly and rearwardly curved cutting edge 24 which terminates in a point 25 at the rear edge of the cutter blade. The cutter blade is adapted to be secured in the opening 22 by means of a securing element 26 threadedly engaged in an opening 21 in the end of the arm IT and which is adapted to be loosened for adjusting the cutter element 23 for varying the length of the blade below the lower end l6 of the center pin M for cutting circular openings through different thicknesses of mounting. The center pin I4 is releasably secured in the bore l5 by means of a stud or screw 28 engaging in a threaded opening in the shank Hi.
In operation and use the band I3 is grasped between the thumb and finger of one hand of the operator for steadying the shank l0 and holding the same in vertical relation while the handle member H is grasped by the other hand of the operator for turning the shank together with the arm and cutter blade 23. For this purpose the handle member is made relatively large to facilitate turning of the tool and while the same is turned the band [3 is held stationary or against rotation by the operator.
What is claimed is:
In a hand tool for cutting circular openings, a shank having an enlarged upper end defining the tool in upright relation, a center pin having 4 having a forwardly disposed downwardly and rearwardly curved cutting edge terminating in a pointed extremity and means adjustably securing said arm in the opening in said shank for varying the elfective, length of the shank for outting circular openings of different sizes.
a sharpened extremity secured in said bore, an
arm slidably mounted in said opening in the shank for disposing the same in horizontal laterally extending relation and formed with a vertical opening in the outer end thereof, a cutter blade adjustably secured in the opening in said arm and 15 Number JACQUES D. DEL MONTE. GEORGE PAPPAS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Name Date 76.4'90 McCormick Am. 7. 1868
US727770A 1947-02-11 1947-02-11 Hand tool for cutting circular openings Expired - Lifetime US2463024A (en)

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US727770A US2463024A (en) 1947-02-11 1947-02-11 Hand tool for cutting circular openings

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US727770A US2463024A (en) 1947-02-11 1947-02-11 Hand tool for cutting circular openings

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747436A (en) * 1952-09-17 1956-05-29 Gen Electric Rotary cutting apparatus
DE1156380B (en) * 1962-02-21 1963-10-31 Elfrid Mengel Circle cutter for paper, cardboard, veneer, plastic or the like.
US3456346A (en) * 1966-10-20 1969-07-22 Commercial Carpet Corp Circle cutter and protective cover
US4858322A (en) * 1988-02-09 1989-08-22 Benjamin Kluga Circle cutter employing base, swivel handle, and pivot bar with adjustable knife
US5007320A (en) * 1988-06-22 1991-04-16 Inventive Ideas Incorporated Compass
CN111993488A (en) * 2020-08-13 2020-11-27 东方电气集团东方锅炉股份有限公司 Tube-tube plate fillet weld radiographic inspection film drilling device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US76490A (en) * 1868-04-07 Mark thomas mccormick

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US76490A (en) * 1868-04-07 Mark thomas mccormick

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747436A (en) * 1952-09-17 1956-05-29 Gen Electric Rotary cutting apparatus
DE1156380B (en) * 1962-02-21 1963-10-31 Elfrid Mengel Circle cutter for paper, cardboard, veneer, plastic or the like.
US3456346A (en) * 1966-10-20 1969-07-22 Commercial Carpet Corp Circle cutter and protective cover
US4858322A (en) * 1988-02-09 1989-08-22 Benjamin Kluga Circle cutter employing base, swivel handle, and pivot bar with adjustable knife
US5007320A (en) * 1988-06-22 1991-04-16 Inventive Ideas Incorporated Compass
CN111993488A (en) * 2020-08-13 2020-11-27 东方电气集团东方锅炉股份有限公司 Tube-tube plate fillet weld radiographic inspection film drilling device

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