Patent US1994186A successfully refreshed from Google Patents.

US3893205A Expired / Lapsed US ⏱️ 0.0 years remaining

Composite metal material and articles made therefrom

Assignee: Texas Instruments Inc

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Filing: 1970-09-25

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Granted: 1975-07-08

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Expires: 1990-09-25

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Abstract

Abstract A composite metal material displaying lower cost and improved strength and corrosion resistance is shown to comprise a layer of copper or brass material and a layer of aluminum material solidphase metallurgically bonded to respective opposite sides of a layer of low carbon steel. The composite material is formed into an article such as a lamp bulb base or a door knob with the brass or copper layer of the composite material facing exteriorly of the article, the aluminum layer of the composite material then serving as a preferentially corrosive material which protects the low carbon steel layer of the composite material from corrosion.

Inventors

👤 Ray B Anderson
👤 Robert Baboian

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-23 18:17

CPC Classifications

E; E05; E05B; E05B1/00; E05B1/0007; B; B23; B23K; B23K20/00; B23K20/22; B23K20/227; E05B15/00; E05B15/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924; Y10T428/12986

Claims Analysis

Total Claims: 10

Claim 1

Independent Claim 152 words

A LAMP BULB BASE EMBODYING A COMPOSITE METAL LAMINATE MATERIAL COMPRISING A FIRST LAYER OF METAL SELECTED FROM THE GROUP CONSISING OF COPPER ALLOYS, A SECOND LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, AND AN INTERMEDIATE LAYER OF STEEL SANDWICHED BETWEEN AND METALLURGICALLY BONDED TO SAID FIRST AND SECOND METAL LAYERS, SAID LAYERS OF METAL BEING COEXTENSIVE IN SAID COMPOSITE MATERIAL WITHIN SAID LAMP BULB BASE, SAID SECOND LAYER MATERIAL BEING MORE ANODIC IN THE GALVANIC SERIES OF METALS AND ALLOYS THAN THE METALS OF SAID FIRST AND INTERMEDIATE METAL LAYERS AND BEING PREFERENTIALLY CORROSIVE IN SAID COMPOSITE MATERIAL, SAID COMPOSITE MATERIAL BEING FORMED IN A GENERALLY CUP-SHAPED CONFIGURATION WITH SAID FIRST LAYER OF SAID COMPOSITE MATERIAL DISPOSED IN EXTERIORLY FACING RELATION IN SAID LAMP BULB BASE AND WITH SAID SECOND, PERFERENTIALLY CORROSIVE, METAL LAYER DISPOSED IN AN INTERIORLY FACING RELATION IN SAID LAMP BULB BASE.

Claim 2

Dependent Claim 152 words

Claim 3

Dependent Claim 129 words

A lamp bulb base as set forth in claim 1 wherein said composite metal laminate material embodies selected materials, said first metal layer comprises a copper material comprising, by weight, 99.90% (Min.) copper with from 0.015% to 0.040% phosphorus and the remainder impurities, said second metal layer comprises an aluminum material comprising, by weight, from 1.0 to 1.5% manganese, 0.6% (Max.) silicon, 0.7% (Max.) iron, 0.20% (Max.) copper, 0.10% (Max.) zinc and the balance aluminum with not more than 0.05% (Max.) of any other element and not more than a total of 0.15% (Max.) of other elements present as impurities, and said intermediate metal layer comprises a steel material comprising, by weight, 0.08% (Max.) carbon, 0.25 to 0.40% manganese, 0.40% (Max.) phosphorus, 0.050% (Max.) silicon, and the balance iron.

Claim 4

Dependent Claim 130 words

A lamp bulb base as set forth in claim 1 wherein said composite metal laminate material embodies selected materials, said first metal layer comprises a brass material comprising, by weight, 68.5 to 71.5% copper, 0.07% (Max.) lead, 0.05% (Max.) iron, and the remainder zinc, said second metal layer comprises an aluminum material comprising, by weight, from 1.0 to 1.5% manganese, 0.6% (Max. silicon, 0.7% (Max.) iron, 0.20% (Max.) copper, 0.10% (Max.) zinc and the balance aluminum with not more than 0.05% (Max.) of any other element and not more than a total of 0.15% (Max.) of other elements present as impurities, and said intermediate metal layer comprises a steel material comprising, by weight, 0.08% (Max.) carbon, 0.25 to 0.40% manganese, 0.40% (Max.) phosphorus, 0.050% (Max.) silicon, and the balance iron.

Claim 5

Dependent Claim 65 words

A lamp bulb base as set forth in claim 1 wherein said composite metal laminate material has metal layers of selected proportions therein, said first metal layer has a thickness comprising approximately 10% of the total thickness of the composite metal laminate material aNd wherein said second metal layer has a thickness comprising approximately 3% of the total thickness of the composite metal laminate material.

Claim 6

Dependent Claim 45 words

A DOOR KNOB EMBODYING COMPOSITE METAL LAMINATE MATERIAL, SAID COMPOSITE MATERIAL COMPRISING A FIRST LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, AND COPPER ALLOYS, A SECOND LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS, AND AN INTERME-

Claim 7

Dependent Claim 45 words

Claim 8

Dependent Claim 128 words

A door knob as set forth in claim 5 wherein said composite metal material embodies selected layer materials, said first metal layer comprises a copper material comprising, by weight, 99.90% (Min.) copper with from 0.015% to 0.040% phosphorus and the remainder impurities, said second metal layer comprises an aluminum material comprising, by weight, from 1.0 to 1.5% manganese, 0.6% (Max.) silicon, 0.7% (Max.) iron, 0.20% (Max.) copper, 0.10% (Max.) zinc and the balance aluminum with not more than 0.05% (Max.) of any other element and not more than a total of 0.15% (Max.) of other elements present as impurities, and said intermediate metal layer comprises a steel material comprising, by weight, 0.08% (Max.) carbon, 0.25 to 0.40% manganese, 0.40% (Max.) phosphorus, 0.050% (Max.) silicon, and the balance iron.

Claim 9

Dependent Claim 130 words

A door knob as set forth in claim 5 wherein said composite metal laminate material embodies selected layer materials, said first metal layer comprises a brass material comprising, by weight, 68.5 to 71.5% copper, 0.07% (Max.) lead, 0.05% (Max.) iron, and the remainder zinc, said second metal layer comprises an aluminum material comprising, by weight, from 1.0 to 1.5% manganese, 0.6% (Max.) silicon, 0.7% (Max.) iron, 0.20% (Max.) copper, 0.10% (Max.) zinc and the balance aluminum with not more than 0.05% (Max.) of any other element and not more than a total of 0.15% (Max.) of other elements present as impurities, and said intermediate metal layer comprises a steel material comprising, by weight, 0.08% (Max.) carbon, 0.25 to 0.40% manganese, 0.40% (Max.) phosphorus, 0.050% (Max.) silicon, and the balance iron.

Claim 10

Dependent Claim 62 words

A door knob as set forth in claim 5 wherein said composite metal laminate material embodies layers of selected proportions, said first metal layer has a thickness comprising approximately 10% of the total thickness of the composite metal laminate material and wherein said second metal layer has a thickness comprising approximately 3% of the total thickness of the composite metal laminate material.

References Cited (Backward Citations)

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US3112185A Cited

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-07-07	1979-01-06	1979-07-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-07-07	1983-01-06	1983-07-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-07-07	1987-01-06	1987-07-08	$7700.00	Window Closed / Lapsed

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