US702011A - Device for removing broken taps. - Google Patents

Device for removing broken taps. Download PDF

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Publication number
US702011A
US702011A US9843402A US1902098434A US702011A US 702011 A US702011 A US 702011A US 9843402 A US9843402 A US 9843402A US 1902098434 A US1902098434 A US 1902098434A US 702011 A US702011 A US 702011A
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United States
Prior art keywords
tap
holder
bars
grooves
broken
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Expired - Lifetime
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US9843402A
Inventor
John Kinvall
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Individual
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Priority to US9843402A priority Critical patent/US702011A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes

Definitions

  • FIG. 1 represents an elevation of adevice for removing pieces of taps broken in the work and embodying my invention.
  • Fig. 2 represents a similar View with the tap-engaging bars extended beyond their cylindrical holder.
  • Fig. 3 is an elevation of myimproved device represented as engaging a piece of broken tap.
  • Fig. 4 is a top view; and
  • Fig. 5 is a sectional view on line 5 5, Fig. 1.
  • My invention relates to a device adapted'to engage and remove pieces of taps which have been broken off in a tapped hole; andit consists of a cylindrical holder whose diameter is substantially equal to the diameter of the tapped hole and which is providedwith a polygonal section at one end to receive a wrench and with longitudinal grooves corresponding with the longitudinal grooves in the tap to receive sliding tap-en gaging bars having their upper ends held in a sliding collar by which the tap-engaging bars are moved lengthwise the cylindrical holder.
  • A denotes the cylindrical holder, having a polygonal section A and longitudinal grooves 13 B to receive the sliding tapengagingbars C, which have upper ends bent at right'angles and inclosed between the two clamping parts D D, which are clamped together by means of the screws E E, forming a collar E
  • the diameter of the cylindrical and 1ongitudinaly-grooved holder A is substantially equal to the diameter of the tapped hole F in the metal piece F, from which it is desired to remove a piece G of a broken tap.
  • the 1ongitudinal grooves B B correspond with the grooves H H in the tap, so that when the cylindrical holder A is inserted in the tapped hole with its end resting upon the end of the broken tap, as represented in Fig. 3, the collar E can be forced down upon the holder, causing the ends of the tap-engaging bars C C to as described.
  • I In order to maintain the holder A in alinement with the piece of broken tap and to retain the tap-engaging bars C within their respective grooves B, I preferably inclose the holder A and bars 0 between the collar D and the piece of metal F, which contains the broken tap, with a sleeve I, provided with a central hole J, of the proper diameter to fit the holder A, and having its lower end K at right angles with the concentric hole J and adapted to restupon the surface L of the piece of metal F.
  • the devices are made in different sizes, corresponding to taps of difierent diameters; but they are substantially the same in their construction and method of operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)

Description

No. 702,0", Patented 1m I0, I902.
J. KINVALL.- H v DEVIQE FUR REMOVING BROKEN TAPS.
' (Application filed 1m. 15, 1902.
(No Model.)
n "m iul fiPl Wines a es efokn I "m: uomus PEYERS ca. mom-umm. WASHINGYON u c UNITED STATES PATENT OFFTCE.
JOHN KINVALL, OF WORCESTER, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHN SCHROEDER 'OF WORCESTER, MASSACHUSETTS.
DEVICE FOR REMOVING BROKEN TAPS. f
SPECIFICATION forming part of Letters Patent No. 702,011, dated June 10, 1902.
' Application filed March 15,
To all whom it may concern:
Be itknown that I, JOHN KINVALL, a citizen of Sweden, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement ina Device for Removing Broken Taps, of which the following is a specification, accompanied by drawings forming a part of the same, in which- Figure 1 represents an elevation of adevice for removing pieces of taps broken in the work and embodying my invention. Fig. 2 represents a similar View with the tap-engaging bars extended beyond their cylindrical holder. Fig. 3 is an elevation of myimproved device represented as engaging a piece of broken tap. Fig. 4 is a top view; and Fig. 5 is a sectional view on line 5 5, Fig. 1.
Similar reference-letters refer to similar parts in the different views.
My invention relates to a device adapted'to engage and remove pieces of taps which have been broken off in a tapped hole; andit consists of a cylindrical holder whose diameter is substantially equal to the diameter of the tapped hole and which is providedwith a polygonal section at one end to receive a wrench and with longitudinal grooves corresponding with the longitudinal grooves in the tap to receive sliding tap-en gaging bars having their upper ends held in a sliding collar by which the tap-engaging bars are moved lengthwise the cylindrical holder.
Referring to the accompanying drawings, A denotes the cylindrical holder, having a polygonal section A and longitudinal grooves 13 B to receive the sliding tapengagingbars C, which have upper ends bent at right'angles and inclosed between the two clamping parts D D, which are clamped together by means of the screws E E, forming a collar E The diameter of the cylindrical and 1ongitudinaly-grooved holder A is substantially equal to the diameter of the tapped hole F in the metal piece F, from which it is desired to remove a piece G of a broken tap. The 1ongitudinal grooves B B correspond with the grooves H H in the tap, so that when the cylindrical holder A is inserted in the tapped hole with its end resting upon the end of the broken tap, as represented in Fig. 3, the collar E can be forced down upon the holder, causing the ends of the tap-engaging bars C C to as described.
1902. Serial No. 98,434. (No model.)
project beyond the end of the holder A into the grooves H H of the tap, and the holder 5 5 and its tap-engaging bars are then rotated by the application of the wrench to the polygonal end A, causing the piece G of broken tap to be turned and unscrewed from the tapped hole F. In order to maintain the holder A in alinement with the piece of broken tap and to retain the tap-engaging bars C within their respective grooves B, I preferably inclose the holder A and bars 0 between the collar D and the piece of metal F, which contains the broken tap, with a sleeve I, provided with a central hole J, of the proper diameter to fit the holder A, and having its lower end K at right angles with the concentric hole J and adapted to restupon the surface L of the piece of metal F. The devices are made in different sizes, corresponding to taps of difierent diameters; but they are substantially the same in their construction and method of operation.
What I claim as my invention, and desire to secure by Letters Patent, is-
1. In a device for removing-broken taps, the combination of 'a holder provided with longitudinal grooves, of tap-engaging bars held in said grooves and capable of sliding 8o therein,means for simultaneously sliding said bars in said grooves into engagement with the grooves in the tap, substantially as described. I
2. The combination with a holder provided with longitudinalgrooves for a series of tap- 8 5 engaging bars, tap-engaging bars held in said grooves and capable of sliding therein, a col-. lar for holding said, bars and sliding them simultaneously in said grooves, substantially 3., The combinationof aholder having longitudinal grooves, tap-engaging bars held in said grooves, a clampingcollar capable of sliding on said holder and clamping the ends of said bars, substantially as described.
4.. The combination-of the grooved holder, tap-engaging bars held in said grooved holder and capable of sliding therein, a'collar engaging said bars, and a sleeve inclosing said holder and bars, substantially as described.
Dated this 12th day of March, 1902.
JOHN KINVALL.
Witnesses:
Tnnonon BERGMAN, RUFUS B. FOWLER.-
US9843402A 1902-03-15 1902-03-15 Device for removing broken taps. Expired - Lifetime US702011A (en)

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US9843402A US702011A (en) 1902-03-15 1902-03-15 Device for removing broken taps.

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US9843402A US702011A (en) 1902-03-15 1902-03-15 Device for removing broken taps.

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696749A (en) * 1954-04-08 1954-12-14 Cantin Oscar Device for removing broken taps
US2744312A (en) * 1951-10-06 1956-05-08 Walton Company Broken drill extractor
US2744311A (en) * 1951-06-21 1956-05-08 Walton Company Drill extractor
US2781683A (en) * 1955-01-27 1957-02-19 Walton Company Broken tap extractor
US2782667A (en) * 1955-05-27 1957-02-26 Walton Company Tap extractor with slidably adjustable fingers
DE2915197A1 (en) * 1978-04-24 1979-10-31 Michael Dorosh TORQUE TRANSMITTING DEVICE FOR INSERTING IN A HOLE OF A WORKPIECE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744311A (en) * 1951-06-21 1956-05-08 Walton Company Drill extractor
US2744312A (en) * 1951-10-06 1956-05-08 Walton Company Broken drill extractor
US2696749A (en) * 1954-04-08 1954-12-14 Cantin Oscar Device for removing broken taps
US2781683A (en) * 1955-01-27 1957-02-19 Walton Company Broken tap extractor
US2782667A (en) * 1955-05-27 1957-02-26 Walton Company Tap extractor with slidably adjustable fingers
DE2915197A1 (en) * 1978-04-24 1979-10-31 Michael Dorosh TORQUE TRANSMITTING DEVICE FOR INSERTING IN A HOLE OF A WORKPIECE

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