US2505236A - Retractive pilot for circle cutters - Google Patents
Retractive pilot for circle cutters Download PDFInfo
- Publication number
- US2505236A US2505236A US701361A US70136146A US2505236A US 2505236 A US2505236 A US 2505236A US 701361 A US701361 A US 701361A US 70136146 A US70136146 A US 70136146A US 2505236 A US2505236 A US 2505236A
- Authority
- US
- United States
- Prior art keywords
- plunger
- recess
- tool
- pilot
- retractive
- 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
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Classifications
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S30/00—Cutlery
- Y10S30/06—Resilient means
-
- 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
- Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
- Y10T408/56—Adapted to "form" recession in work
- Y10T408/5605—Recession at tool-axis
-
- 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
- Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
- Y10T408/564—Movable relative to Tool along tool-axis
- Y10T408/5653—Movable relative to Tool along tool-axis with means to bias Tool away from work
-
- 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
- Y10T408/83—Tool-support with means to move Tool relative to tool-support
- Y10T408/85—Tool-support with means to move Tool relative to tool-support to move radially
-
- 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
- Y10T82/00—Turning
- Y10T82/25—Lathe
- Y10T82/2522—Portable
Definitions
- Fig. 1 is a side elevational view, partly in section of a device embodying the invention
- Figs. 2 and 3 are, respectively, top and bottom views of the device
- Fig.4 is a right end view of a portion of the device of Fig. 1 with other parts of the device omitted or broken away;
- Fig. 5 is a right end view of the tool holder of the device.
- Figs. 6, 7, and 8 illustrate a combination tool for use on the device and particularly adapted to cut rings and washers.
- the invention comprises a cylindrical bodyportion I which is axially perforated to provide a larger bottom recess I and a smaller recess I sunk into the top thereof.
- Aflplung-errl is' fitted m1 slide within-the recess I g ne 'thi'splunger is at the'bottomthere-f of counterbored to receive aresilient pad or plug yieldingly l projected, and a bolt 5; the head "of hich is seated in the upper bodyrecess l limits outward'f 'movementofthe 'plunger.
- E'Attimesit maybe found'fdeisrable to make a *ce'nt'e'r"puncfimark in the material in order more conveniently to provide for correct positioning of the device.
- a center guide pin I I within the plunger and to place a light spring I2 behind this guide, as indicated in Fig. 1.
- a shallow roove H is sunk into the side of this guide pin for engagement by a screw I3 to limit downward movement thereof.
- this guide pin is not to be used, it is merely required to push it inward, beyond the surface of the pad 3, and to advance the screw I3 until it clamps the pin firmly in this retracted position or, if preferred the guide pin may be detached.
- Figs. 6 to 8 For use in cutting circular rings and wedges, the cutter combination of Figs. 6 to 8 is found more convenient.
- This combination cutter consists of a'post I5, which is perforated near the bottom thereof to receive a rod I6, and the latter is lengthwise adjustable within the post.
- a pair of cutter holders 18 are mounted on the rod in the manner best indicated in Fi 8. It is noticed that these holders are perforated to receive the rod in the same manner that the post [5 is perforated, and that they are similarly slotted to receive clamping bolts l9. In the lower end of each cutter holder is cut a slot at right angles to the slot at the upper end thereof of a size to receive a cutting tool 20, and a bolt 2i serves to clamp each cutting tool rigidly .in position. In order to maintain the rod l6 rigidly in clamped position, it is well to serrate the surface thereof, substantially as indicated at It in the drawings or, if preferred, the rod may be made rectangular in .cross section.
- these tool holders maybe variously arranged on one side or on bothsides of the post as may be found most convenient for particular operations.
- This type of combination tool is particularly designed for cutting thin material such as paper, cardboard or plastic sheets.
- a tubular cylindrical body terminating in a shank at the top thereof and having a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool holder, a plunger fitted to slide within said bottom recess and terminating at the bottom in an enlarged head, said plunger having a threaded recess at the top thereof and a cylindrical recess at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an. anti-friction thrust bearing between the end of the body and the spring, and a guide pin axially slidable in the bottom recess of the plunger.
- a tubular cylindrical body terminating in a shank at the top thereof andhaving' a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool holder, a plunger fitted to slide within said bottom recess and terminating at the bottom in an enlarged head, said plunger having a threaded recess at the top thereof and a cylindrical recess 1 at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an anti-friction thrust bearing between the end of the body and the spring, a guide pin seated for axial movement within the plunger, a spring urging said pin downward, and means limitin sliding movement of the pin.
- a tubular cylindrical body terminating in a shank at the top thereof and having a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool.
- a plunger fitted to slide Within said bottom recess and terminating at the bottom in an enlarged annular head, a resilient pad seated in and downwardly projecting from the head, said plunger having a threaded recess at the top thereof and a cylindrical recess at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an antifriction thrust bearing between the end of the body and the spring, a guide pin seated for axial movement within the plunger, a spring urging said pin downward, and means limiting sliding movement of theapin, said means being operable to lock the pin in retracted position within the plunger.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Description
April 25, 1950 J. F. D OOLEY RETRACTIVE PILOT FOR CIRCLE CUT'I'ERS Filed Oct. 4, 1946 V INVENTOR.
Patented Apr. 1950 f amm 2,505,23ii Luth a e ease QQTTERS- --D? l llhcel iv 11 Application qetober l, 19%,; Se ial No. 701,361
1 3 Claims.
"'Thepresent invention'ha's relationto improve 'mentspin means for producing circular-cuts of various sizes in sheets of metal or other matelTools-of the type referredto-are conventionally made with a central pilot which is insertable ina'h'ole in'thematerial tobe cut for thepurpose of guiding the cutter during the'cutting opera tion. "Frequently solid-discs are to--be produced and suchdisos could not be made with the pilot type of-cutt'er which requires the-presence of the projected element which will recede whenthe cutter is movdagainst the material to be out, but will functionas a .guidepin in connection with material'havi'ng'a" central perforation of a size to-receivesuch pins Another object is to providea cutter mecha nism of simple and sturdy-construction. Still another.object is to provide acutter mechanism which" may be held firmly in position on the material during the cutting"operationfwithout marringor otherwise 'injuringlthe surface thereof,
Another' object "is to provide a .cutte1"- mechanisin which{isquickly' and convenientlyfadju'st ableto perform great varieties, of circular cutting ioperations." I f I f .With these. and other objec s n;view,ltheiin' vent'ion resides inthe' combinations set forth in the following detailed description, and reference is invited to the accompanying drawings, of which:
Fig. 1 is a side elevational view, partly in section of a device embodying the invention;
Figs. 2 and 3 are, respectively, top and bottom views of the device;
Fig.4 is a right end view of a portion of the device of Fig. 1 with other parts of the device omitted or broken away;
Fig. 5 is a right end view of the tool holder of the device; and
Figs. 6, 7, and 8 illustrate a combination tool for use on the device and particularly adapted to cut rings and washers.
As illustrated in the drawings, the invention comprises a cylindrical bodyportion I which is axially perforated to provide a larger bottom recess I and a smaller recess I sunk into the top thereof. Aflplung-errl is' fitted m1 slide within-the recess I g ne 'thi'splunger is at the'bottomthere-f of counterbored to receive aresilient pad or plug yieldingly l projected, and a bolt 5; the head "of hich is seated in the upper bodyrecess l limits outward'f 'movementofthe 'plunger.
"The body'is shown made in the-sides thereof withjdiametrically opposed"recesses -I', I, in:
which the prongs" for legs of a *bifuifcated tool hoiderflfare seatedto "slide.- Tliei*head of this tool'holde'r" is semi=circular in shape and itf'is made with parallel slots or recesses 6 6 'of a'size to receive a cutting tool Ai The holder ism'ovable radially to adjust thefdevicato 'the diameter of thecut or cutstobe madei; 'Iti's important to note that thes'efslots areradia'lly spaced apart, and this'is done'in' orderthat the tool'may be moved from slot to slot to cuticircles of different diameters without disturbing the setting of the" tool "holder" in the g'roov'es'ofthe body portion or;
ir="preer1-ed,fa sepa a t l a Placed in" each fs'lotf The tool and tool holderfare clamped in'adjustedposition by means of screwss, 9.
ln o'peration, the deviceisset in the spindle of a'drill pre'ss ormilling machine and moved until the padf3 icont'acts" the 'niaterialjto be Jcut;
When thereupoiii the spindle is rotated and the deviceidepre's'sed;against the tension'of the spring 4;"fuintil the cutter reaches and sinks into the maj-g te'ri'alJ-it 'is' fdundthatthe pad will maintain the device firmly in position. A ball or roller'thrust bearingIWis set"i'ntoxthebody I to eliminate frictionb'etwee'n the spring and the body.
E'Attimesit maybe found'fdeisrable to make a *ce'nt'e'r"puncfimark in the material in order more conveniently to provide for correct positioning of the device. When such is provided, it is possible to mount a center guide pin I I within the plunger and to place a light spring I2 behind this guide, as indicated in Fig. 1. A shallow roove H is sunk into the side of this guide pin for engagement by a screw I3 to limit downward movement thereof. In cases where this guide pin is not to be used, it is merely required to push it inward, beyond the surface of the pad 3, and to advance the screw I3 until it clamps the pin firmly in this retracted position or, if preferred the guide pin may be detached.
For use in cutting circular rings and wedges, the cutter combination of Figs. 6 to 8 is found more convenient. This combination cutter consists of a'post I5, which is perforated near the bottom thereof to receive a rod I6, and the latter is lengthwise adjustable within the post. The
lower end of the post is shown slotted up from the bottom thereof to the said perforations and a bolt I1 is seated in this slotted portion to clamp the rod H5 in adjusted position.
A pair of cutter holders 18 are mounted on the rod in the manner best indicated in Fi 8. It is noticed that these holders are perforated to receive the rod in the same manner that the post [5 is perforated, and that they are similarly slotted to receive clamping bolts l9. In the lower end of each cutter holder is cut a slot at right angles to the slot at the upper end thereof of a size to receive a cutting tool 20, and a bolt 2i serves to clamp each cutting tool rigidly .in position. In order to maintain the rod l6 rigidly in clamped position, it is well to serrate the surface thereof, substantially as indicated at It in the drawings or, if preferred, the rod may be made rectangular in .cross section.
As illustrated in Figs. 6 and '7, these tool holdersmaybe variously arranged on one side or on bothsides of the post as may be found most convenient for particular operations. This type of combination tool is particularly designed for cutting thin material such as paper, cardboard or plastic sheets.
'While I have herein described and shown a preferred form of the invention, I do not intend thereby to be limited to the exact proportions and arrangements of parts and features shown, but reserve the right to embody modifications within the scope of the claims hereto appended.
I claim:
1. In a circle cutting tool, a tubular cylindrical body terminating in a shank at the top thereof and having a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool holder, a plunger fitted to slide within said bottom recess and terminating at the bottom in an enlarged head, said plunger having a threaded recess at the top thereof and a cylindrical recess at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an. anti-friction thrust bearing between the end of the body and the spring, and a guide pin axially slidable in the bottom recess of the plunger. 7
2. In a circle cutting tool, a tubular cylindrical body terminating in a shank at the top thereof andhaving' a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool holder, a plunger fitted to slide within said bottom recess and terminating at the bottom in an enlarged head, said plunger having a threaded recess at the top thereof and a cylindrical recess 1 at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an anti-friction thrust bearing between the end of the body and the spring, a guide pin seated for axial movement within the plunger, a spring urging said pin downward, and means limitin sliding movement of the pin.
3. In a circle cutting tool, a tubular cylindrical body terminating in a shank at the top thereof and having a cylindrical recess axially sunk in the top and bottom surfaces thereof, the body having diametrically opposite parallel grooves in the side thereof for supporting therein a tool.
holder, a plunger fitted to slide Within said bottom recess and terminating at the bottom in an enlarged annular head, a resilient pad seated in and downwardly projecting from the head, said plunger having a threaded recess at the top thereof and a cylindrical recess at its bottom, a bolt seated in the threads of said plunger recess, said bolt having a head riding in the top recess of the body, a spring on the plunger between the body and the plunger head urging downward movement of the plunger, an antifriction thrust bearing between the end of the body and the spring, a guide pin seated for axial movement within the plunger, a spring urging said pin downward, and means limiting sliding movement of theapin, said means being operable to lock the pin in retracted position within the plunger.
JOHN F. DOOLEY.
REFERENCES CITED The following references are of record in the file of this patent? UNITED STATES PATENTS Smith Aug. 27,
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701361A US2505236A (en) | 1946-10-04 | 1946-10-04 | Retractive pilot for circle cutters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US701361A US2505236A (en) | 1946-10-04 | 1946-10-04 | Retractive pilot for circle cutters |
Publications (1)
Publication Number | Publication Date |
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US2505236A true US2505236A (en) | 1950-04-25 |
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ID=24817050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US701361A Expired - Lifetime US2505236A (en) | 1946-10-04 | 1946-10-04 | Retractive pilot for circle cutters |
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US (1) | US2505236A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2631357A (en) * | 1950-09-13 | 1953-03-17 | Gobel Charles | Tool carrier and toolholder |
US2693853A (en) * | 1950-09-19 | 1954-11-09 | Samuel Grant Bloomer | Hole cutting tool |
US2716282A (en) * | 1952-07-31 | 1955-08-30 | Carl B Kromsten | Gasket cutter |
US2778108A (en) * | 1955-11-15 | 1957-01-22 | Milton L Welsh | Adjustable gasket cutter |
US2781582A (en) * | 1955-02-07 | 1957-02-19 | Wursch Walter | Magnetic center holder for a workshop compass |
US2925116A (en) * | 1956-06-25 | 1960-02-16 | William J Eberle | Method of and apparatus for producing flexible boot flashing |
US3068577A (en) * | 1961-08-18 | 1962-12-18 | Universal Instruments Corp | Radius scriber |
US4203692A (en) * | 1978-12-20 | 1980-05-20 | Jensen Roger S | Self-centering hole saw adapter |
US4413413A (en) * | 1982-04-07 | 1983-11-08 | Burroughs Corporation | Cutting tool for use on printed circuit board wiring |
US4616418A (en) * | 1985-06-28 | 1986-10-14 | Wade Iii Charles R | Beam compass having changeable parts |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US67194A (en) * | 1867-07-30 | Improved tube-hole cutter | ||
US94870A (en) * | 1869-09-14 | Improved washer-cutter | ||
US1354848A (en) * | 1920-02-25 | 1920-10-05 | Adam P Schilling | Radius-cutter for metals |
US2223485A (en) * | 1939-10-16 | 1940-12-03 | Clarence M Eveleth | Countersink |
US2263637A (en) * | 1941-08-09 | 1941-11-25 | Henry E Maupin | Geometrical instrument |
US2359091A (en) * | 1942-05-08 | 1944-09-26 | Westinghouse Electric & Mfg Co | Test core drill |
US2360942A (en) * | 1943-01-23 | 1944-10-24 | Jack I Ellerstein | Drill guide |
US2406442A (en) * | 1943-08-11 | 1946-08-27 | Robert H Clark | Fly cutter |
-
1946
- 1946-10-04 US US701361A patent/US2505236A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US67194A (en) * | 1867-07-30 | Improved tube-hole cutter | ||
US94870A (en) * | 1869-09-14 | Improved washer-cutter | ||
US1354848A (en) * | 1920-02-25 | 1920-10-05 | Adam P Schilling | Radius-cutter for metals |
US2223485A (en) * | 1939-10-16 | 1940-12-03 | Clarence M Eveleth | Countersink |
US2263637A (en) * | 1941-08-09 | 1941-11-25 | Henry E Maupin | Geometrical instrument |
US2359091A (en) * | 1942-05-08 | 1944-09-26 | Westinghouse Electric & Mfg Co | Test core drill |
US2360942A (en) * | 1943-01-23 | 1944-10-24 | Jack I Ellerstein | Drill guide |
US2406442A (en) * | 1943-08-11 | 1946-08-27 | Robert H Clark | Fly cutter |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2631357A (en) * | 1950-09-13 | 1953-03-17 | Gobel Charles | Tool carrier and toolholder |
US2693853A (en) * | 1950-09-19 | 1954-11-09 | Samuel Grant Bloomer | Hole cutting tool |
US2716282A (en) * | 1952-07-31 | 1955-08-30 | Carl B Kromsten | Gasket cutter |
US2781582A (en) * | 1955-02-07 | 1957-02-19 | Wursch Walter | Magnetic center holder for a workshop compass |
US2778108A (en) * | 1955-11-15 | 1957-01-22 | Milton L Welsh | Adjustable gasket cutter |
US2925116A (en) * | 1956-06-25 | 1960-02-16 | William J Eberle | Method of and apparatus for producing flexible boot flashing |
US3068577A (en) * | 1961-08-18 | 1962-12-18 | Universal Instruments Corp | Radius scriber |
US4203692A (en) * | 1978-12-20 | 1980-05-20 | Jensen Roger S | Self-centering hole saw adapter |
US4413413A (en) * | 1982-04-07 | 1983-11-08 | Burroughs Corporation | Cutting tool for use on printed circuit board wiring |
US4616418A (en) * | 1985-06-28 | 1986-10-14 | Wade Iii Charles R | Beam compass having changeable parts |
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