US3786228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric soldering iron tip
Assignee: ROESCH K Inc
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Filing: 1971-12-15
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Granted: 1974-01-15
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Expires: 1991-12-15
Abstract
Abstract An electric soldering iron tip includes a U-shaped metallic heating member formed from an elongated strip of Kovar or other low expansion iron-nickel alloys. The base portion of the Ushaped heating member has an elongated strip of ceramic material, such as beryllium oxide, attached to one side thereof for receiving heat from the heating member and forming a soldering surface for engaging the work to be soldered in order to apply heat thereto for soldering purposes. A second ceramic strip, formed of alumina, is connected to the opposite side of the base portion of the heating member from the first ceramic strip for preventing deformation of the tip due to differences in the coefficients of expansion of the first ceramic strip and the heating member to which it is attached. The ceramic strips are brazed to the heating member to provide a strong bond having excellent thermal conductivity characteristics. The arm sections of the U-shaped heating member are adapted to be connected to a source of electrical energy to effect flow of heating current through the member.
Inventors
- 👤 F Castellana
- 👤 J Liker
- 👤 S Kokolis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:26
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/04; B23K3/047; B23K3/0471; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12354; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2949
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A soldering device according to claim 1; including another elongated ceramic strip having thermally conductive and electrically insulative properties bonded to another elongated surface portion of said heating member and extending along said heating member in direct spaced-apart opposition from said first-mentioned ceramic strip to effectively counteract deformation forces resulting from differences in the coefficients of expansion between said heating member and said first-mentioned ceramic strip.
Claim 2
Dependent Claim
45 words
A soldering device according to claim 2; wherein said another ceramic strip is composed of a material having a lower thermal conductivity than that of said first-mentioned ceramic strip so that heat energy generated by said heating member is directed towards said first-mentioned ceramic strip.
Claim 3
Dependent Claim
17 words
A soldering device according to claim 3; wherein said first-mentioned ceramic strip is composed of beryllium oxide.
Claim 4
Dependent Claim
16 words
A soldering device according to claim 4; wherein said another ceramic strip is composed of alumina.
Claim 5
Dependent Claim
32 words
A soldering device according to claim 5; wherein said heating member is composed of an alloy consisting essentially of about 54 percent iron, about 28 percent nickel and about 18 percent cobalt.
Claim 6
Dependent Claim
64 words
A soldering device according to claim 2; wherein both said first-mentioned surface portion of said heating member to which said first-mentioned ceramic strip is bonded and said another surface portion of said heating member to which said another ceramic strip is bonded have a planar configuration whereby said first-mentioned ceramic strip, said heating member, and said another ceramic strip jointly comprise a layered structure.
Claim 7
Dependent Claim
38 words
A soldering device according to claim 2; wherein said means defining a thermally conductive bond comprises a metallized coating disposed on said bonDing surface of said ceramic strip and brazed to said surface portion of said heating member.
Claim 8
Dependent Claim
143 words
A soldering device according to claim 1; wherein said heating member comprises a metal rod having a generally U-shaped configuration defined by an elongated base section, and two arm sections extending outwardly in the same direction from opposite ends of said elongated base section and connectable to the source of electrical energy during use of the soldering device; wherein said elongated ceramic strip extends along and is bonded to the outer portion of said elongated base section corresponding to the outer base portion of the U; and another elongated ceramic strip having thermally conductive and electrically insulative properties extending along and bonded to the inner portion of said elongated base section corresponding to the inner base portion of the U to effectively counteract deformation forces resulting from differences in the coefficients of expansion between said heating member and said first-mentioned elongated ceramic strip.
Claim 9
Dependent Claim
43 words
A soldering device according to claim 9; wherein said another ceramic strip is composed of a material having a lower thermal conductivity than said first-mentioned ceramic strip so that heat energy generated by said heating member is directed towards said first-mentioned ceramic strip.
Claim 10
Dependent Claim
19 words
A soldering device according to claim 9; wherein said first-mentioned ceramic strip extends only linearly along said heating member.
Claim 11
Dependent Claim
26 words
A soldering device according to claim 9; wherein said first-mentioned ceramic strip is composed of beryllium oxide and said another ceramic strip is composed of alumina.
References Cited (Backward Citations)
US2848801A
Cited
US2796507A
Cited
US3136878A
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US3230338A
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US3481638A
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US3537886A
Cited
US3576969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |