US1461032A - Center punch - Google Patents

Center punch Download PDF

Info

Publication number
US1461032A
US1461032A US420009A US42000920A US1461032A US 1461032 A US1461032 A US 1461032A US 420009 A US420009 A US 420009A US 42000920 A US42000920 A US 42000920A US 1461032 A US1461032 A US 1461032A
Authority
US
United States
Prior art keywords
tool
striker
shank
center punch
spring
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
US420009A
Inventor
Forsyth Alexander
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.)
ARTHUR M FRASER
Original Assignee
ARTHUR M FRASER
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
Application filed by ARTHUR M FRASER filed Critical ARTHUR M FRASER
Priority to US420009A priority Critical patent/US1461032A/en
Application granted granted Critical
Publication of US1461032A publication Critical patent/US1461032A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D5/00—Centre punches

Definitions

  • This invention relates to an improvement in center punches and the like.
  • the object ofthe invention is to provide a tool for making an indentation upon the surface of an object usually constructed of metal, the said indentation being made by said tool without the employment of a hammer or other similar independent striking instrument or without necessitating the em ployment of more than one hand for positioning the tool upon the work and thereafter operating said tool.
  • the invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claim thereof.
  • Figure 1 is an elevation of my improved center punch.
  • Fig. 2 is an elevation similar to Figure 1 illustrating the method of operating the tool.
  • Fig. 3 is a longitudinal section through the tool.
  • 5 represents a tapered member preferably constructed of hardened steel terminating at its lower end in a point 6 by which suitable indentations or marks may be made in the surface of the work desired, as, for example, the end of a shaft 7 see Figure 2.
  • a shank 8 Detachably secured at the upper end of the member 5 is a shank 8 which has screw-threaded engagement with said member at 9.
  • a shoulder 10 is formed at the junction of the shank 8 and the member 5.
  • a striker 11 approximately spherical in form is slidably mounted upon the shank 8, the lower surface thereof abutting against the shoulder 10, being forced thereagainst by a helical spring 12 which surrounds said shank.
  • the lower end of the spring 12 abuts against the upper surface of the striker 11 while the upper end of said spring 12 abuts against the under surface of a head 13 formed at the upper extremity of the shank 8, the spring being at all times under compression between said head and said striker.
  • the upper surface of the head 13 is slightly recessed at 14 in order that a thumb or finger may rest therein in operat ing the tool.
  • the general operation of the tool is as follows :-With the tool grasped in one hand in any manner suitable to the operator, but preferably with the thumb or forefinger located in the recess 14 as illustrated in Figure 2, the point 6 of the tool is positioned upon the work 7.
  • the striker 11 is then raised as illustrated in Figure 2 to a suiiicient height to give the desired amount of compression to the spring 12, after which the said striker is released, being forced downwardly by the spring and striking against the shoulder 10.
  • the blow imparted to the shoulder 10 is transmitted through the member 5 to the work and an indentation made therein by the point 6, the size of the indentation depending upon the force of the blow and the degree of hardness of the work. If one blow of the striker 11 is not suificient to form an indentation of the size desired, the blows may be repeated indefinitely until an indentation is formed the size desired.
  • a center punch embodying therein a member provided with a point at its lower extremity and also provided with a shoulder formed thereon, a shank located at the upper extremity of said member and having screwthreaded engagement therewith, a head formed integral with said shank at the upper end thereof and provided with a recess therein constituting a finger rest, a striker slidably mounted upon said shank and a spring surrounding said shank between said head and said striker and adapted to force said striker against said shoulder.

Description

July, 10, 1923. mmmz A. FORSYTH I CENTER PUNCH Filed Oct. 27, 1920 Ira/6721507? 05% exa7zde7-f57 @/z/ Patented July 10, 1923.
ALEXANDER FORSYTH, OF WESTBORO, MASSACHUSETTS, ASSIGNOR TO ARTHUR M.
, FRASER, 0F WESTBORO, MASSACHUSETTS.
CENTER PUNCH.
Application filed October 27, 1920. Serial No. 420,009.
To all whom it may concern:
Be it known that I, ALEXANDER Fonsyrn, a subject of the King of England, residing at lVestboro, in the county of Worcester and State of Massachusetts, have invented new and useful Improvements in Center Punches, of which the following is a specification.
This invention relates to an improvement in center punches and the like.
The object ofthe invention is to provide a tool for making an indentation upon the surface of an object usually constructed of metal, the said indentation being made by said tool without the employment of a hammer or other similar independent striking instrument or without necessitating the em ployment of more than one hand for positioning the tool upon the work and thereafter operating said tool.
The invention consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claim thereof.
Referring to the drawings:
Figure 1 is an elevation of my improved center punch.
Fig. 2 is an elevation similar to Figure 1 illustrating the method of operating the tool.
Fig. 3 is a longitudinal section through the tool.
Like numerals refer to like parts throughout the several views of the drawings.
In the drawings, 5 represents a tapered member preferably constructed of hardened steel terminating at its lower end in a point 6 by which suitable indentations or marks may be made in the surface of the work desired, as, for example, the end of a shaft 7 see Figure 2. Detachably secured at the upper end of the member 5 is a shank 8 which has screw-threaded engagement with said member at 9. A shoulder 10 is formed at the junction of the shank 8 and the member 5. A striker 11 approximately spherical in form is slidably mounted upon the shank 8, the lower surface thereof abutting against the shoulder 10, being forced thereagainst by a helical spring 12 which surrounds said shank. The lower end of the spring 12 abuts against the upper surface of the striker 11 while the upper end of said spring 12 abuts against the under surface of a head 13 formed at the upper extremity of the shank 8, the spring being at all times under compression between said head and said striker. The upper surface of the head 13 is slightly recessed at 14 in order that a thumb or finger may rest therein in operat ing the tool The general operation of the tool is as follows :-With the tool grasped in one hand in any manner suitable to the operator, but preferably with the thumb or forefinger located in the recess 14 as illustrated in Figure 2, the point 6 of the tool is positioned upon the work 7. The striker 11 is then raised as illustrated in Figure 2 to a suiiicient height to give the desired amount of compression to the spring 12, after which the said striker is released, being forced downwardly by the spring and striking against the shoulder 10. The blow imparted to the shoulder 10 is transmitted through the member 5 to the work and an indentation made therein by the point 6, the size of the indentation depending upon the force of the blow and the degree of hardness of the work. If one blow of the striker 11 is not suificient to form an indentation of the size desired, the blows may be repeated indefinitely until an indentation is formed the size desired.
I claim:
A center punch embodying therein a member provided with a point at its lower extremity and also provided with a shoulder formed thereon, a shank located at the upper extremity of said member and having screwthreaded engagement therewith, a head formed integral with said shank at the upper end thereof and provided with a recess therein constituting a finger rest, a striker slidably mounted upon said shank and a spring surrounding said shank between said head and said striker and adapted to force said striker against said shoulder.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
ALEXANDER FORSYTH.
Witnesses:
J OHN M. Yorme, .Anrnnu M Fnasrn.
US420009A 1920-10-27 1920-10-27 Center punch Expired - Lifetime US1461032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US420009A US1461032A (en) 1920-10-27 1920-10-27 Center punch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US420009A US1461032A (en) 1920-10-27 1920-10-27 Center punch

Publications (1)

Publication Number Publication Date
US1461032A true US1461032A (en) 1923-07-10

Family

ID=23664690

Family Applications (1)

Application Number Title Priority Date Filing Date
US420009A Expired - Lifetime US1461032A (en) 1920-10-27 1920-10-27 Center punch

Country Status (1)

Country Link
US (1) US1461032A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776490A (en) * 1955-06-03 1957-01-08 Arthur B Carfagni Multi-purpose dental tool
US4006763A (en) * 1975-10-03 1977-02-08 The Raymond Lee Organization, Inc. Impact reaction hammer
US5307741A (en) * 1993-06-15 1994-05-03 Spring Line, Inc. Impact hand stamping device
US5433007A (en) * 1993-09-01 1995-07-18 Spring Line, Inc. Self-centering impact hand tool
DE102004007329A1 (en) * 2004-02-14 2005-09-01 G-Pox Gmbh & Co. Vermarktungs Kg Self striking punch has a striker attached to the punch head by a tensile spring
US20050211452A1 (en) * 2004-03-24 2005-09-29 A Major Corporation Spring powered hand tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776490A (en) * 1955-06-03 1957-01-08 Arthur B Carfagni Multi-purpose dental tool
US4006763A (en) * 1975-10-03 1977-02-08 The Raymond Lee Organization, Inc. Impact reaction hammer
US5307741A (en) * 1993-06-15 1994-05-03 Spring Line, Inc. Impact hand stamping device
WO1994029114A1 (en) * 1993-06-15 1994-12-22 Spring Line, Inc. Impact hand stamping device
US5433007A (en) * 1993-09-01 1995-07-18 Spring Line, Inc. Self-centering impact hand tool
DE102004007329A1 (en) * 2004-02-14 2005-09-01 G-Pox Gmbh & Co. Vermarktungs Kg Self striking punch has a striker attached to the punch head by a tensile spring
US20050211452A1 (en) * 2004-03-24 2005-09-29 A Major Corporation Spring powered hand tool

Similar Documents

Publication Publication Date Title
US1572046A (en) Impression-making tool
US1461032A (en) Center punch
US1449136A (en) Punching tool
US987355A (en) Punch.
US960193A (en) Combination-tool.
US2485489A (en) Tool for reshaping automobile panels
US2446848A (en) Punch
US783749A (en) Center-punch.
US2123393A (en) Tool handle
US2061660A (en) Riveting tool
US224023A (en) Horseshoe-hammer
US2100961A (en) Rail bender
GB273427A (en) A new or improved combination tool for beekeepers
US838865A (en) Hatchet.
US924210A (en) Method of making hand-tools.
US1488230A (en) Rivet set
US982832A (en) Pickax.
US1558560A (en) Hammer-actuated ice pick
US884229A (en) Combination-tool.
US737952A (en) Automatic hammer.
GB118698A (en) Improved Marking, Eyeletting or Rivetting Apparatus.
US932223A (en) Process of manufacturing tools.
US455776A (en) Albert f
US285127A (en) Die foe fokming- the glaws of hatchets
US766808A (en) Combination-tool.