Patent US3625358A successfully refreshed from Google Patents.
Patent US3787078A successfully refreshed from Google Patents.
Patent US2603924A successfully refreshed from Google Patents.
Patent US3685715A successfully refreshed from Google Patents.
US3685715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering apparatus
Assignee: LOUIS R F J PERRIN
•
Filing: 1970-06-29
•
Granted: 1972-08-22
•
Expires: 1990-06-29
Abstract
Abstract Soldering apparatus including a tin bath and means for melting the tin and maintaining it in motion in a molten state, including a ferromagnetic core in a closed frame, a primary and secondary winding mounted side-by-side thereon with a stirrup piece of lowohmic resistance, the tin bath being contained in an electrically non-conductive crucible placed between the extremities of the stirrup piece which contains a non-conductive guide forming a nappe of tin extending from one edge of the crucible to the other and situated near the bottom of the tin bath, an electrical contact being established between the extension of the stirrup piece and the edges of this nappe.
Inventors
- 👤 Louis R F J Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:08
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/06; B23K3/0646; B23K3/0653; B23K2101/00; B23K2101/36; B23K2101/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
An apparatus for tin soldering circuit elements mounted on a support carrying a printed circuit to said support, by setting molten tin in motion and projecting a stream of molten tin in an upward direction from a tin bath so that the upper envelope of the stream of tin has a convex shape which is substantially stable and constant, said apparatus comprising: a ferromagnetic core in the form of a closed frame; a primary winding surrounding a portion of said core with which said winding is associated in a linking configuration; a secondary winding located beside said primary winding and surrounding a portion of said core, said secondary winding comprising a single closed turn including a U-shaped stirrup member having a low ohmic resistance and a tin bath electrically connecting the upright portions of said U-shaped member; a substantially electrically insulating crucible for containing the tin bath, said crucible located between the uprights of the U-shaped member, said crucible containing a substantially electrically insulating guide bar extending between the sides of the crucible which abut said uprights, said bar being spaced adjacent the bottom of the crucible and at least in part defining an opening directed toward the top of the crucible for projection of a stream of molten tin, and said crucible including means for electrically connecting the edges of the layer of tin which is beneath the bar within the crucible.
Claim 2
Independent Claim
233 words
An apparatus for tin soldering circuit elements mounted on a support carrying a printed circuit to said support, by setting molten tin in motion and projecting a stream of molten tin in an upward direction from a tin bath so that the upper envelope of the stream of tin has a convex shape which is substantially stable and constant, said apparatus comprising: a ferromagnetic core in the form of a closed frame; a primary winding surrounding a portion of said core with which said winding is associated in a linking configuration; a secondary winding located beside said primary winding and surrounding a portion of said core, said secondary winding comprising a single closed turn including a U-shaped stirrup member having a low ohmic resistance and a tin bath electrically connecting the upright portions of said U-shaped member; a substantially electrically insulating crucible for containing the tin bath, said crucible located between the uprights of the U-shaped member, said crucible containing a substantially electrically insulating guide bar extending between the sides of the crucible which abut said uprights, said bar being spaced adjacent the bottom of the crucible and at least in part defining an opening directed toward the top of the crucible for projection of a stream of molten tin, and said crucible including means for electrically connecting the edges of the layer of tin which is beneath the bar within the crucible.
Claim 3
Dependent Claim
65 words
An apparatus according to claim 1, wherein the means for electrically connecting the edges of the layer of tin beneath the bar within the crucible comprises tin filling openings in the sides of the crucible which abut the uprights of the U-shaped member, which sides are firmly gripped between said uprights so that the uprights close said openings thereby preventing any loss of molten tin.
Claim 4
Dependent Claim
17 words
An apparatus according to claim 2, characterized in that the crucible is made of anodically oxidized aluminum.
Claim 5
Dependent Claim
24 words
An apparatus according to claim 1, characterized in that the said guide bar consists of a prismatic bar of at least approximately rectangular cross-section.
Claim 6
Dependent Claim
43 words
An apparatus according to claim 4, characterized in that the openings in the sides of the crucible extend between the bottom of the crucible and the guide bar, starting from the edge of the guide bar opposite the opening defined by said bar.
Claim 7
Dependent Claim
35 words
An apparatus according to claim 4, characterized in that it additionally comprises a series of nozzles disposed in the opening directed toward the top of the crucible for projection of a stream of molten tin.
Claim 8
Dependent Claim
36 words
An apparatus according to claim 1, wherein the opening directed toward the top of the crucible for projection of a stream of molten tin, is defined between the guide bar and an end of the crucible.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |