US2223485A - Countersink - Google Patents

Countersink Download PDF

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Publication number
US2223485A
US2223485A US299747A US29974739A US2223485A US 2223485 A US2223485 A US 2223485A US 299747 A US299747 A US 299747A US 29974739 A US29974739 A US 29974739A US 2223485 A US2223485 A US 2223485A
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United States
Prior art keywords
stop
countersink
recess
bit
casing
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Expired - Lifetime
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US299747A
Inventor
Clarence M Eveleth
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Individual
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Priority to US299747A priority Critical patent/US2223485A/en
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Publication of US2223485A publication Critical patent/US2223485A/en
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Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/10Bits for countersinking
    • B23B51/104Bits for countersinking with stops
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/55Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/566Axially fixed to Tool
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/89Tool or Tool with support
    • Y10T408/892Tool or Tool with support with work-engaging structure detachable from cutting edge
    • Y10T408/8925Depth-limiting member

Definitions

  • This invention relates to a tool comprising a stop and a countersink member journaled in the stop, the stop limiting the amount that the countersinkilng member enters the .material.
  • the present invention aims to provide novel means whereby the stop will be prevented from marring finely finished surfaces.
  • FIG. 1 shows in elevation, a device constructed in accordance with the invention, parts being broken away;
  • Fig. 2 is a bottom plan
  • Figs. 3, 4 and 5 are diagrammaticelevations illustrating the operating of the device which characterizes this application.
  • the numeral I marks a tubular casing provided at its lower end with a foot 2 whereon a sleeve 3 is secured by threading, the sleeve being provided at its lower end with an inwardly extended, annular flange 4.
  • the numeral 5 designates a tubular stop, having a head 6 received between the flange 4 of the sleeve 3 and the foot 2 of the casing I, the construction being such that there can be relative movement between the casing and the stop, so far as rotation is concerned.
  • the numeral I marks a countersink bit extended through the casing I and the stop 5, the bit having a working end 8.
  • the countersink bit I is threaded at 9 into the casing I, for adjustment, to determine the amount that the working end 8 of the bit projects downwardly beyond thelower end of the stop 5, and to determine the depth of the countersink.
  • the countersink bit I is held in its adjusted position, by means of a jamb nut Ill engaged with the threads 9 of thecountersink bit and engaging the upper end of the casing I.
  • the part I I is a knurled collar formed on the casing I, whereby the casing can be held against rotation whilst the jamnut I0 is being tightened up.
  • the device as thus far described comprises a countersink tool, including both the casing I and the bit I, and a tubular stop, to wit, the part 5, the stop and the countersink tool being connected together for relative rotation.
  • the countersink tool including the bit I and the casing I, is rotated and the working end B of the bit forms a countersink in the material.
  • the depth of the countersink is determined when the lower end of the stop 5 comes into contact with the material.
  • Such a combination of parts, and the resulting operation are reasonably satisfactory if rough material is being countersunk. If, however, a finely finished or polished material is being countersunk, it will be damaged or marred by contact with the lower end of, the stop 5.
  • This invention aims to provide a simple but effective means whereby such a contingency will be avoided.
  • the stop 5 is provided at its lower end with circumferentially spaced fingers I2.
  • a rectangular recess I4 is formed in the lower end of each finger I2, and at one side thereof.
  • a bore I5 in the finger I2 leads upwardly from the lower end of the finger, past the recess,
  • a cushion I6 is secured in the bore.
  • the plug I5 is long enough so that inits normal condition, it projects downwardly below the lower end of the finger I2, as Fig. 3 will show.
  • the upper wall of the recess I4 is rounded, as shown at IT. This is done to the end that when the lower end of the plug I5 is flexed laterally, as in Figs. 4 and 5, the plug will not be cut.
  • a circumferentially extended groove I8 i formed, the groove being shaped to correspond. with the cross sectionof the plug I6.
  • the countersinking tool 'I-I' is rotated, and the working end 8 of the countersink bit I forms a. countersink in the material.
  • the finger I2 is rotated in the direction of the arrow A in Fig. 3,'the lower end of the plug I6 comes into contact with the material.
  • the problem presented at this stage is to stop the rotation of the member 5, under the drag of the'countersinking tool. That is done by pressing the tool down, as shown by the arrow B in Fig. 4, until the lower end of the plug it is 55 brought into close frictional contact with the work. .
  • the recess l4 exercises two functions. It provides a space into which the flexed lower end of the plug l6 can retire, as in ,Fig. 4. Moreover, since the lower end of the'plug It does not have to be compressed throughout its entire cross section, it is not difllcult to bring 'the finger I2 claimed is:
  • a rigid material-engaging stop having a bore at its lower end, a countersink tool journaled in the stop,
  • the stop being provided at its lower end with a. recess leading into said here and into which the cushion can retire when flexed laterally, the depth of the recess being less than the diameter 01' the cushion.
  • a rigid material-engaging stop having a bore at its lower into said bore and into which the cushion can retire when flexed laterally, the depth of the recess being less than the diameter of the cushion, and the stop being provided, at the upper wall of the recess, with a circumferentially extended groove, receiving a portion of the cushion.
  • material-engaging stop having a longitudinal bore and a lateral recess in its lower end
  • the recess being less than-the diameter or the cushion, the cushion being laterally flexible to enter the recess, the stop being rounded at the place 01'- juncture between the, recess and the bore, to prevent the cushion from being cut whenflexed, and a countersink tool jouma-led in the stop and extended downwardly below the' stop.
  • a device a circumferentially extended groove, located in the upper wall of the recess, and shaped to receive the flexed cushion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Dec; 3, 1940. c EVELETH 2,223,435
) COUNTERS INK Filed Oct. 16, 1939 G'flZEveZeZiZ/ INVENTOR.
ATTORNEYS.
Patented Dec. 3, 1940 UNITED STATES PATENT OFFICE COUNTERSINK Clarence M. Eveleth, River Forest, Ill.
Application October 16, 1939, Serial No. 299,747
' 4 Claims. (Cl. -123) This invention relates to a tool comprising a stop and a countersink member journaled in the stop, the stop limiting the amount that the countersinkilng member enters the .material. The present invention aims to provide novel means whereby the stop will be prevented from marring finely finished surfaces.
It'is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.-
With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and anrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.
In the drawing:
Fig. 1 shows in elevation, a device constructed in accordance with the invention, parts being broken away;
Fig. 2 is a bottom plan;
Figs. 3, 4 and 5 are diagrammaticelevations illustrating the operating of the device which characterizes this application.
The numeral I marks a tubular casing provided at its lower end with a foot 2 whereon a sleeve 3 is secured by threading, the sleeve being provided at its lower end with an inwardly extended, annular flange 4. The numeral 5 designates a tubular stop, having a head 6 received between the flange 4 of the sleeve 3 and the foot 2 of the casing I, the construction being such that there can be relative movement between the casing and the stop, so far as rotation is concerned. I v
The numeral I marksa countersink bit extended through the casing I and the stop 5, the bit having a working end 8. The countersink bit I is threaded at 9 into the casing I, for adjustment, to determine the amount that the working end 8 of the bit projects downwardly beyond thelower end of the stop 5, and to determine the depth of the countersink. After the countersink bit I has been adjusted longitudinally with respect to the casing I, the countersink bit is held in its adjusted position, by means of a jamb nut Ill engaged with the threads 9 of thecountersink bit and engaging the upper end of the casing I. The part I I is a knurled collar formed on the casing I, whereby the casing can be held against rotation whilst the jamnut I0 is being tightened up.
After the desired longitudinal adjustment of the countersink bit I has been attained, and the jamb nut Ill set against the end of the casing I,
the casing I and the bit 'I turn as one piece.
Grossly considered, the device as thus far described comprises a countersink tool, including both the casing I and the bit I, and a tubular stop, to wit, the part 5, the stop and the countersink tool being connected together for relative rotation.
Generally stated, the countersink tool, including the bit I and the casing I, is rotated and the working end B of the bit forms a countersink in the material. The depth of the countersink is determined when the lower end of the stop 5 comes into contact with the material. Such a combination of parts, and the resulting operation, are reasonably satisfactory if rough material is being countersunk. If, however, a finely finished or polished material is being countersunk, it will be damaged or marred by contact with the lower end of, the stop 5. This invention aims to provide a simple but effective means whereby such a contingency will be avoided.
The stop 5 is provided at its lower end with circumferentially spaced fingers I2. In the lower end of each finger I2, and at one side thereof, a rectangular recess I4 is formed. A bore I5 in the finger I2 leads upwardly from the lower end of the finger, past the recess, A cushion I6 is secured in the bore. I5, and, preferably, is a cylindrical rubber plug. The plug I5 is long enough so that inits normal condition, it projects downwardly below the lower end of the finger I2, as Fig. 3 will show. The upper wall of the recess I4 is rounded, as shown at IT. This is done to the end that when the lower end of the plug I5 is flexed laterally, as in Figs. 4 and 5, the plug will not be cut. In the upper wall of the recess 4, a circumferentially extended groove I8 i formed, the groove being shaped to correspond. with the cross sectionof the plug I6.
In practical operation, the countersinking tool 'I-I'is rotated, and the working end 8 of the countersink bit I forms a. countersink in the material. When the finger I2 is rotated in the direction of the arrow A in Fig. 3,'the lower end of the plug I6 comes into contact with the material. The problem presented at this stage is to stop the rotation of the member 5, under the drag of the'countersinking tool. That is done by pressing the tool down, as shown by the arrow B in Fig. 4, until the lower end of the plug it is 55 brought into close frictional contact with the work. .The lower end 01 the plug it retires into the recess l4, and is held against lateral swingingmovement, because the lower part oi. the plug is received in the groove 18.
The rotation of the stop 5 now has been terminated, the parts being in the position of Fig. 4, but that is not enough. The tool must be pressed downwardly, in the direction of the arrow C in Fig. 5, until the lower end of the finger l2 comes into contact with the work. That contact determines positively, the depth of the countersink formed by the working end 8 of the bit 1. brought into contact with the work the depth of the countersink could not be determined deflnitely, because the plug 16 is compressible.
The recess l4 exercises two functions. It provides a space into which the flexed lower end of the plug l6 can retire, as in ,Fig. 4. Moreover, since the lower end of the'plug It does not have to be compressed throughout its entire cross section, it is not difllcult to bring 'the finger I2 claimed is:
1. In a device of the class described, a rigid material-engaging stop having a bore at its lower end, a countersink tool journaled in the stop,
and a compressible, material-engaging cushion carried by the bore in said stop and projecting If the lower end of the finger l2 were not below the lower end of the stop, the stop being provided at its lower end with a. recess leading into said here and into which the cushion can retire when flexed laterally, the depth of the recess being less than the diameter 01' the cushion.
2. In a device of the class described, a rigid material-engaging stop having a bore at its lower into said bore and into which the cushion can retire when flexed laterally, the depth of the recess being less than the diameter of the cushion, and the stop being provided, at the upper wall of the recess, with a circumferentially extended groove, receiving a portion of the cushion.
3. In a device of the class described, a rigid 2| material-engaging stop having a longitudinal bore and a lateral recess in its lower end, the
recess leading to the bore, a compressible, ma-
terial-engaging cushion mounted in the bore and projecting beyond the lower end of the stop, the 2:
. heightfoi' the recess being less than-the diameter or the cushion, the cushion being laterally flexible to enter the recess, the stop being rounded at the place 01'- juncture between the, recess and the bore, to prevent the cushion from being cut whenflexed, and a countersink tool jouma-led in the stop and extended downwardly below the' stop. I 4. A device a circumferentially extended groove, located in the upper wall of the recess, and shaped to receive the flexed cushion.
of the class described, constructed as set forth in claimxli and wherein the stop has
US299747A 1939-10-16 1939-10-16 Countersink Expired - Lifetime US2223485A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505236A (en) * 1946-10-04 1950-04-25 John F Dooley Retractive pilot for circle cutters
US2700905A (en) * 1947-02-07 1955-02-01 Kenneth M Urquhart Drill bit depth gauge
US3121938A (en) * 1962-04-05 1964-02-25 Remington Arms Co Inc Hand guard for file
US4225275A (en) * 1978-03-10 1980-09-30 Elliott William L Drill bit
US4993894A (en) * 1989-02-27 1991-02-19 Fischerwerke Artur Fischer Gmbh & Co. Kg Drill
US6471450B1 (en) 2001-06-18 2002-10-29 Northrop Grumman Corporation Countersink cage
US20060257220A1 (en) * 2005-05-10 2006-11-16 Paul Gertner Depth limiting device and hole forming apparatus containing the same
US20070044291A1 (en) * 2005-08-23 2007-03-01 Paul Gertner System and method for precisely matching a predrilling tool with an insert for insertion into a substrate
EP2093001A1 (en) * 2008-02-19 2009-08-26 wolfcraft GmbH Rotationally driven tool with axially adjustable stopping sleeve, in particular a chamfering tool
AT14439U1 (en) * 2013-11-14 2015-11-15 Sihga Handels Gmbh drilling

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505236A (en) * 1946-10-04 1950-04-25 John F Dooley Retractive pilot for circle cutters
US2700905A (en) * 1947-02-07 1955-02-01 Kenneth M Urquhart Drill bit depth gauge
US3121938A (en) * 1962-04-05 1964-02-25 Remington Arms Co Inc Hand guard for file
US4225275A (en) * 1978-03-10 1980-09-30 Elliott William L Drill bit
US4993894A (en) * 1989-02-27 1991-02-19 Fischerwerke Artur Fischer Gmbh & Co. Kg Drill
US6471450B1 (en) 2001-06-18 2002-10-29 Northrop Grumman Corporation Countersink cage
US20060257220A1 (en) * 2005-05-10 2006-11-16 Paul Gertner Depth limiting device and hole forming apparatus containing the same
US7258513B2 (en) 2005-05-10 2007-08-21 Paul Gertner Depth limiting device and hole forming apparatus containing the same
EP1721692A3 (en) * 2005-05-10 2009-07-15 Paul Gertner Depth limiting device and hole forming apparatus containing the same
US20070044291A1 (en) * 2005-08-23 2007-03-01 Paul Gertner System and method for precisely matching a predrilling tool with an insert for insertion into a substrate
EP2093001A1 (en) * 2008-02-19 2009-08-26 wolfcraft GmbH Rotationally driven tool with axially adjustable stopping sleeve, in particular a chamfering tool
DE202009017801U1 (en) 2008-02-19 2010-06-24 Wolfcraft Gmbh Rotary drivable tool with axially adjustable stop sleeve, in particular countersink
AT14439U1 (en) * 2013-11-14 2015-11-15 Sihga Handels Gmbh drilling

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