US3626147A — Underwater arc welding apparatus with pivotal base

Claim 1

Independent Claim 218 words

An underwater arc welding apparatus comprising: a source of electric welding current; a source of compressed gas; a support mechanism; a welding rod holder having an inner space and carried by the support mechanism; a gas conduit connecting said source of compressed gas to said inner space of said holder; an electric conductor disposed in said inner space of said holder; an electric cable, connecting said source of electric welding current with said conductor; a welding rod comprising a welding rod portion and an outer sheath portion surrounding said rod portion in a spaced relation; a gas passage existing between the said rod portion and said sheath portion; said welding rod having a tip end and base end, being mounted with said base end in said holder being openly connected with said source of compressed gas and in electrical contact with said conductor, in which said conductor comprises two hinging portions and a pivot pin, said two hinging portions being pivotally supported on said pivot pin in such a rigid connection arrangement that said hinging portions may be manually pivoted about said pivot pin relative to each other, but when they are released, said hinging portions may maintain a predetermined relative relation; said pivot pin of the said hinging portions being enclosed by a bellows-shape insulative annular member.

Claim 2

Dependent Claim 218 words

An underwater arc welding apparatus comprising: a source of electric welding current; a source of compressed gas; a support mechanism; a welding rod holder having an inner space and carried by the support mechanism; a gas conduit connecting said source of compressed gas to said inner space of said holder; an electric conductor disposed in said inner space of said holder; an electric cable, connecting said source of electric welding current with said conductor; a welding rod comprising a welding rod portion and an outer sheath portion surrounding said rod portion in a spaced relation; a gas passage existing between the said rod portion and said sheath portion; said welding rod having a tip end and base end, being mounted with said base end in said holder being openly connected with said source of compressed gas and in electrical contact with said conductor, in which said conductor comprises two hinging portions and a pivot pin, said two hinging portions being pivotally supported on said pivot pin in such a rigid connection arrangement that said hinging portions may be manually pivoted about said pivot pin relative to each other, but when they are released, said hinging portions may maintain a predetermined relative relation; said pivot pin of the said hinging portions being enclosed by a bellows-shape insulative annular member.

Claim 3

Dependent Claim 112 words

An underwater arc welding apparatus as set forth in claim 1, in which said welding rod further comprises an aluminum wire spacer, wound on said welding rod portion having a base end, in a spiral form between said welding rod portion and said outer sheath; and an aluminum plug tightly secured to said base end of said welding rod portion for holding said outer sheath in an airtight relation to said base end, said pluG being provided at one end surface thereof with a plurality of apertures through which said inner space of said welding rod holder and said annular space in said welding rod may be openly connected with each other.

Claim 4

Dependent Claim 96 words

An apparatus as set forth in claim 1, in which said welding rod further includes an aluminum wire spacer wound around said welding rod in a spiral form between said welding rod portion and said outer sheath portion and an aluminum plug attached to the base end of said welding rod portion for communicating with said outer sheath portion in an air tight relation, said aluminum plug being provided at one end surface with a plurality of apertures through which said inner space of said holder is communicated with said gas passage of said welding rod.

Claim 5

Dependent Claim 87 words

An apparatus as set forth in claim 1, in which said support mechanism comprises a pedestal, a rocking plate pivotally supported by said pedestal for forwardly and backwardly pivotal movement, and a retaining member attached to said rocking plate and detachably mounting said electrode holder, said rocking plate having a cam plate at the rear portion thereof and a roller pivoted on said pedestal and mounted to rock forwardly for contact with said cam plate so as to cause said composite welding rod to contact a workpiece.

Claim 6

Dependent Claim 101 words

An apparatus as set forth in claim 4, further comprising a cylindrical member and a compression spring, in which a portion of said cam plate is slidably retained in said cylindrical member secured to said rocking plate and normally subject to a force to a position just behind said rocking plate by the pressure action of said spring whereby when said roller is pulled backwardly said cam plate is pulled away from the position behind said rocking plate against the force of said spring in contact with said roller and said roller is guided to a position behind the cam plate.

Claim 7

Dependent Claim 167 words

An apparatus as set forth in claim 5, in which said support mechanism further includes a plurality pairs of arms at the opposite ends of said pedestal with said arms of each pair diverging toward one end at 90*, and at least one of the arms has a first permanent magnet detachably secured thereto whereby the bottom of said pedestal rides on a workpiece with a stability by the permanent magnet being attracted toward the workpiece and when a fillet welding is performed, the arms in each pair of said plurality pairs of arms are so arranged that they are adapted to contact the vertical portion and horizontal portion of said workpiece, and said support mechanism further includes a second permanent magnet pivotally supported on the upper surface of said pedestal by means of a stub shaft for lateral movement, said second permanent magnet being adapted to be attracted to said workpiece when a fillet welding is performed whereby the pedestal is stably held on a workpiece.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-12-06	1975-06-07	1975-12-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-12-06	1979-06-07	1979-12-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-12-06	1983-06-07	1983-12-07	$7700.00	Window Closed / Lapsed

Underwater arc welding apparatus with pivotal base

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