US2437633A - Electric welding ground - Google Patents

Electric welding ground Download PDF

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Publication number
US2437633A
US2437633A US510063A US51006343A US2437633A US 2437633 A US2437633 A US 2437633A US 510063 A US510063 A US 510063A US 51006343 A US51006343 A US 51006343A US 2437633 A US2437633 A US 2437633A
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United States
Prior art keywords
pin
electric welding
welding ground
magnet
ground
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Expired - Lifetime
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US510063A
Inventor
Oliver R Abram
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Priority to US510063A priority Critical patent/US2437633A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/30—End pieces held in contact by a magnet

Definitions

  • My invention relates to electric welding, and has among its objects and advantages the provision of an improved magnetic ground for direct current arc welding devices.
  • Figure 1 is a perspective view of my invention.
  • Figure 2 is a longitudinal sectional view.
  • Figure 3 is a bottom view
  • Figure 4 is a diagrammatic view of the electric circuit.
  • I make use of an electromagnet I of the horseshoe type for coaction with the work l2.
  • This magnet is attached to the top wall [4 of a, metal case I 6 which is open at its bottom end.
  • a sheet of insulation I8 is interposed between the magnet I0 and the top wall 14, and the magnet is made secure by screws i9 which are insulated from the case 16.
  • the magnet isiormed of laminated iron.
  • a steel pin 20 is slidably guided in insulatin wall by a bushing 60.
  • To the terminal screw 58 i is connected one end of a wire 62 leading to a coil 64 on one leg of the magnet l0.
  • a second wire 66 leads from the coil 64 and through an opening 68 in one of the plugs 42 for connection with a toggle switch 10 mounted inside the handle 38.
  • An insulated wire 12 leads from the toggle switch 10 to the electrode side of the welding machine 46.
  • bushings 22 supported in arms 24 attached to 1 the magnet ID by screws 26.
  • An opening 28 is provided in the wall M to loosely accommodate the pin 20, and the lower end of the pin is provided with a hardened steel point 30 of tapered contour and adapted for engagement with the work l2.
  • a coil spring 32 having one end abutting the uppermost bushing 22 and its other end abutting a washer 34 on the pin and resting on a key 36 attached to the pin 20.
  • the pin 20 is slldably guided by the arms 24 and is yieldingly biased against the work l2.
  • a tubular handle 38 is provided with a lip 40 spot welded to the wall l4, and insulating plugs 42 are secured in both ends of the handle.
  • a ground wire 44 extending from the welding machine 46 extends throughopenings 48 in the plugs 42 and connects with a clip 50 mounted on the pin 20.
  • This clip is interposed between a lock nut 52 threadedly connected with the pin 20 and a cap nut 54 threadedly connected with the upper end of the pin.
  • a short wire 56 is interposed between the clip 50 and lock nut 52 and connectswith a, terminal screw 58 extending through the lip 40, the wall l4 and the insulation l8, but the terminal screw is insulated from the lip and the
  • an electric welding apparatus comprising a housing having an open bottom, a horseshoe type electromagnet carried interiorly of the housing and extending below the bottom thereof, guide arms carried by one side of the electromagnet, a contact pin vertically movably supported in said guide arms, insulated bushings carried by said arms to insulate said pin from said arms and said electromagnet and a, spring acting on said pin for yieldingly holding it in contact with the work.

Description

M A R B R 0 ELECTRIC WELDING GROUND Filed Nov. 12, 1943 t INVENTOR. Olyverliflflbram ATTORNEYS Patented Mar. 9, 1948 "UNITED STATES PATENT OFFICE 2,437,633 ELECTRIC WELDING GROUND Oliver R. Abram, Glendale, Calif.
Application November 12, 1943, Serial No. 510,063
'1 Claim. (01. 173-324) My invention relates to electric welding, and has among its objects and advantages the provision of an improved magnetic ground for direct current arc welding devices.
In the accompanying drawings:
Figure 1 is a perspective view of my invention.
Figure 2 is a longitudinal sectional view.
Figure 3 is a bottom view, and
Figure 4 is a diagrammatic view of the electric circuit.
In the embodiment of the invention selected for illustration, I make use of an electromagnet I of the horseshoe type for coaction with the work l2. This magnet is attached to the top wall [4 of a, metal case I 6 which is open at its bottom end. A sheet of insulation I8 is interposed between the magnet I0 and the top wall 14, and the magnet is made secure by screws i9 which are insulated from the case 16. The magnet isiormed of laminated iron.
A steel pin 20 is slidably guided in insulatin wall by a bushing 60. To the terminal screw 58 i is connected one end of a wire 62 leading to a coil 64 on one leg of the magnet l0.
A second wire 66 leads from the coil 64 and through an opening 68 in one of the plugs 42 for connection with a toggle switch 10 mounted inside the handle 38. An insulated wire 12 leads from the toggle switch 10 to the electrode side of the welding machine 46. The wire 14 in Figure 4 with the work.
bushings 22 supported in arms 24 attached to 1 the magnet ID by screws 26. An opening 28 is provided in the wall M to loosely accommodate the pin 20, and the lower end of the pin is provided with a hardened steel point 30 of tapered contour and adapted for engagement with the work l2. Upon the pin 20 is mounted a coil spring 32 having one end abutting the uppermost bushing 22 and its other end abutting a washer 34 on the pin and resting on a key 36 attached to the pin 20. Thus the pin 20 is slldably guided by the arms 24 and is yieldingly biased against the work l2.
A tubular handle 38 is provided with a lip 40 spot welded to the wall l4, and insulating plugs 42 are secured in both ends of the handle.
A ground wire 44 extending from the welding machine 46 extends throughopenings 48 in the plugs 42 and connects with a clip 50 mounted on the pin 20. This clip is interposed between a lock nut 52 threadedly connected with the pin 20 and a cap nut 54 threadedly connected with the upper end of the pin. A short wire 56 is interposed between the clip 50 and lock nut 52 and connectswith a, terminal screw 58 extending through the lip 40, the wall l4 and the insulation l8, but the terminal screw is insulated from the lip and the Without further elaboration, the foregoing will so fully explain my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.
I claim:
In an electric welding apparatus comprising a housing having an open bottom, a horseshoe type electromagnet carried interiorly of the housing and extending below the bottom thereof, guide arms carried by one side of the electromagnet, a contact pin vertically movably supported in said guide arms, insulated bushings carried by said arms to insulate said pin from said arms and said electromagnet and a, spring acting on said pin for yieldingly holding it in contact with the work.
OLIVER R. ABRAM.
REFERENCES CITED .The following references are of record in the file of this patent:
UNITED S'IA'I'ES PATENTS Number Name Date 1,249,430 Lewis Dec. 11, 1917 1,292,296 Freese Jan. 21, 1919 2,170,287 Kinnebrew Aug. 22, 1939 2,287,112 Lourie June 23, 1942 2,312,083 Doane Feb. 23, 1943 2,345,630 Ringwald Apr. 4, 1944
US510063A 1943-11-12 1943-11-12 Electric welding ground Expired - Lifetime US2437633A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489475A (en) * 1947-12-18 1949-11-29 Dings Magnetic Separator Co Magnetic welder's ground clamp
US3227988A (en) * 1961-02-13 1966-01-04 Texaco Inc Magnet clamp for an apparatus for indicating an electrically grounded condition
US3518607A (en) * 1968-04-12 1970-06-30 Richard F Reel Safety ground device
US6283767B1 (en) 1999-09-23 2001-09-04 Factor Tool As Grounding terminal
US20070034619A1 (en) * 2005-08-10 2007-02-15 Heard Ian G Magnetic Ground Clamp
US20160322743A1 (en) * 2015-05-01 2016-11-03 Illinois Tool Works Inc. Apparatus for establishing an electrical contact with a target surface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1249430A (en) * 1916-10-03 1917-12-11 Wilbur S Lewis Test-clip.
US1292296A (en) * 1917-02-12 1919-01-21 Earl C Freese Magneto.
US2170287A (en) * 1937-06-14 1939-08-22 Walter L Kinnebrew Detachable electrical connector
US2287112A (en) * 1941-07-22 1942-06-23 Jacques W Lourie Magnetic clamp
US2312083A (en) * 1941-02-26 1943-02-23 Magnaflux Corp Electromagnetic connector
US2345630A (en) * 1942-09-02 1944-04-04 Ringwald Clarence Welding apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1249430A (en) * 1916-10-03 1917-12-11 Wilbur S Lewis Test-clip.
US1292296A (en) * 1917-02-12 1919-01-21 Earl C Freese Magneto.
US2170287A (en) * 1937-06-14 1939-08-22 Walter L Kinnebrew Detachable electrical connector
US2312083A (en) * 1941-02-26 1943-02-23 Magnaflux Corp Electromagnetic connector
US2287112A (en) * 1941-07-22 1942-06-23 Jacques W Lourie Magnetic clamp
US2345630A (en) * 1942-09-02 1944-04-04 Ringwald Clarence Welding apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489475A (en) * 1947-12-18 1949-11-29 Dings Magnetic Separator Co Magnetic welder's ground clamp
US3227988A (en) * 1961-02-13 1966-01-04 Texaco Inc Magnet clamp for an apparatus for indicating an electrically grounded condition
US3518607A (en) * 1968-04-12 1970-06-30 Richard F Reel Safety ground device
US6283767B1 (en) 1999-09-23 2001-09-04 Factor Tool As Grounding terminal
US20070034619A1 (en) * 2005-08-10 2007-02-15 Heard Ian G Magnetic Ground Clamp
US20160322743A1 (en) * 2015-05-01 2016-11-03 Illinois Tool Works Inc. Apparatus for establishing an electrical contact with a target surface
US9799988B2 (en) * 2015-05-01 2017-10-24 Illinois Tool Works Inc. Apparatus for establishing an electrical contact with a target surface

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