US3665881A - Spring blades for contact arms and the method for making the same - Google Patents
Spring blades for contact arms and the method for making the same Download PDFInfo
- Publication number
- US3665881A US3665881A US58610A US3665881DA US3665881A US 3665881 A US3665881 A US 3665881A US 58610 A US58610 A US 58610A US 3665881D A US3665881D A US 3665881DA US 3665881 A US3665881 A US 3665881A
- Authority
- US
- United States
- Prior art keywords
- sheet
- annealed
- contact arm
- spring contact
- accordance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000000137 annealing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
Definitions
- Another object of the present invention is to provide the foregoing blade which is formed at one end to provide the terminal portion.
- Still another object of the invention is to provide the threads in the terminal end surface prior to forming the terminal portion.
- Yet another object of the present invention is to provide the foregoing spring blades capable of being made relatively inexpensively and with facility by automatic or semi-automatic machines.
- FIG. 1 is a perspective view of a sheet or ribbon of electrically conductive spring blade material diagrammatically illustrating the heat treatment thereof;
- FIGS. 3 and 4 are side views of two spring contact arm blades made in accordance with the present invention.
- FIGS. 6 and 7 are enlarged fragmentary sectional views taken on lines 6/6 of FIG. 3 and 7/7 of FIG. 4, respectively.
- the spring contact arm blades 20 are laterally extending strips which are cut or blanked from the ribbon 10 either ad- 15 jacent to the heat treat site or at another location where required machines are available. One or more blades 20 can be blanked or cut from the leading end of the ribbon as it is being fed to a suitable machine.
- a hole or opening 23 is provided in the free end 22 of the blade 20.
- a series of axially spaced holes 23 can be punched in the ribbon 10 adjacent its lateral edge 13 as the ribbon is being fed to the blanking machine.
- a hole or opening 23 can be suitably provided at the same time the blade is blanked.
- the annealed end portion 24 is then rolled to one side of the normal plane of the blade 20 to form the tubular portion 27 as shown in FIG. 6.
- the threads 25 are disposed within the tubular terminal portion 27 and are now formed to accept a threaded fastener 31 at either end as shown in FIGS. 6 and 7.
- the rolling or forming of the annealed end portion 24 normally is sufficient cold working to harden the material so the tubular terminal portion 27 is not enlarged by the insertion of a threaded fastener 31. However, in some instances, further hardening may be required. 7
- an L-shaped blade may be desired.
- the blade 20 is provided with a bend 28 which offsets the terminal portion 27 and the adjacent blade portion 29 from the normal plane of the main blade portion 21.
- FIGS. 6 and 7 when a spring contact am is mounted in a switch case as shown, described and claimed in our co-pending application, Ser. No. 58,609, filed Sept. 28, 1970, now U.S. Pat. No. 3,609,273, the shoulder portion 26 abuts a case wall 30 to space the main or operating blade portion 21.
- the tubular portion 27 extends past the shoulder portion 26 into an opening in the case wall 30 to provide the switch with an external connection capability as shown in FIG. 7. If an internal connection capability, as shown in FIG. 6 is desired, the opening in the wall 30 may be an internal socket recess.
- the method of fabricating spring contact arm blades comprising the steps of providing an elongated sheet of electrically conductive spring blade material, annealing one side of said sheet, deforming one surface of the annealed side of said sheet to provide threads in the tubular terminal portion of each strip, cutting said sheet laterally to provide a plurality of strips of predetermined size and shape each of which is annealed at one end, and rolling the annealed end of each of said strips to form a tubular threaded terminal portion.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5861070A | 1970-07-27 | 1970-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3665881A true US3665881A (en) | 1972-05-30 |
Family
ID=22017876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US58610A Expired - Lifetime US3665881A (en) | 1970-07-27 | 1970-07-27 | Spring blades for contact arms and the method for making the same |
Country Status (1)
Country | Link |
---|---|
US (1) | US3665881A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3828706A (en) * | 1973-01-02 | 1974-08-13 | Ideal Ind | Method of making a terminal |
US3857349A (en) * | 1973-07-19 | 1974-12-31 | Amp Inc | Method for fabricating a threaded tap by stamping |
US3890106A (en) * | 1973-02-27 | 1975-06-17 | Weatherhead Co | Selective cold work hardening of metallic extrusions |
US4266310A (en) * | 1977-10-17 | 1981-05-12 | Frederick Perrault | Arrangement for forming metal parts |
US4860570A (en) * | 1987-02-02 | 1989-08-29 | Whipple Patent Management Corporation | Low tonnage high quality thread stamping |
US7147729B2 (en) | 2002-02-11 | 2006-12-12 | Tyco Electronics Corporation | Method and apparatus for induction heat treating electrical contacts |
US20160336662A1 (en) * | 2014-01-28 | 2016-11-17 | Sumitomo Wiring Systems, Ltd. | Terminal and aluminum wire connection structure of terminal |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2024388A (en) * | 1934-07-18 | 1935-12-17 | Gen Motors Corp | Insulated electrode construction for spark plugs |
US2106595A (en) * | 1936-01-11 | 1938-01-25 | Hugh H Eby Inc | Electrical terminal |
US2193737A (en) * | 1937-01-26 | 1940-03-12 | Metal Trim Ltd | Method of rolling profiled sections from sheet metal |
US2511806A (en) * | 1950-06-13 | Electrical connector | ||
US2932880A (en) * | 1955-02-24 | 1960-04-19 | Western Electric Co | Method of making electrical switching devices |
US3152237A (en) * | 1960-12-28 | 1964-10-06 | American Mach & Foundry | Electrical switching devices with movable contact engageable with v-shaped contact |
US3453855A (en) * | 1967-04-17 | 1969-07-08 | Motoo Morita | Method of automatically producing leaf springs having an eye at both ends thereof and automatic eye forming machine |
US3497890A (en) * | 1967-08-31 | 1970-03-03 | Threadline Fastener Corp | Fastener and method of making the same |
-
1970
- 1970-07-27 US US58610A patent/US3665881A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2511806A (en) * | 1950-06-13 | Electrical connector | ||
US2024388A (en) * | 1934-07-18 | 1935-12-17 | Gen Motors Corp | Insulated electrode construction for spark plugs |
US2106595A (en) * | 1936-01-11 | 1938-01-25 | Hugh H Eby Inc | Electrical terminal |
US2193737A (en) * | 1937-01-26 | 1940-03-12 | Metal Trim Ltd | Method of rolling profiled sections from sheet metal |
US2932880A (en) * | 1955-02-24 | 1960-04-19 | Western Electric Co | Method of making electrical switching devices |
US3152237A (en) * | 1960-12-28 | 1964-10-06 | American Mach & Foundry | Electrical switching devices with movable contact engageable with v-shaped contact |
US3453855A (en) * | 1967-04-17 | 1969-07-08 | Motoo Morita | Method of automatically producing leaf springs having an eye at both ends thereof and automatic eye forming machine |
US3497890A (en) * | 1967-08-31 | 1970-03-03 | Threadline Fastener Corp | Fastener and method of making the same |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3828706A (en) * | 1973-01-02 | 1974-08-13 | Ideal Ind | Method of making a terminal |
US3890106A (en) * | 1973-02-27 | 1975-06-17 | Weatherhead Co | Selective cold work hardening of metallic extrusions |
US3857349A (en) * | 1973-07-19 | 1974-12-31 | Amp Inc | Method for fabricating a threaded tap by stamping |
US4266310A (en) * | 1977-10-17 | 1981-05-12 | Frederick Perrault | Arrangement for forming metal parts |
US4860570A (en) * | 1987-02-02 | 1989-08-29 | Whipple Patent Management Corporation | Low tonnage high quality thread stamping |
US7147729B2 (en) | 2002-02-11 | 2006-12-12 | Tyco Electronics Corporation | Method and apparatus for induction heat treating electrical contacts |
US20160336662A1 (en) * | 2014-01-28 | 2016-11-17 | Sumitomo Wiring Systems, Ltd. | Terminal and aluminum wire connection structure of terminal |
US9711875B2 (en) * | 2014-01-28 | 2017-07-18 | Sumitomo Wiring Systems, Ltd. | Terminal and aluminum wire connection structure of terminal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3124408A (en) | Screw fasteners and terminal boards incorporating the same | |
US2610390A (en) | Method of making electrical terminals | |
US4712299A (en) | Process for producing electrical contacts for facilitating mass mounting to a contact holder | |
US3665881A (en) | Spring blades for contact arms and the method for making the same | |
US3818423A (en) | Integrated circuit terminal and method | |
CH628484A5 (en) | METHOD AND CONTACT BAR FOR THE PRODUCTION OF GAS-TIGHT CONNECTIONS FOR PRINTED BACKWALL WIRING. | |
US3735017A (en) | Lead frames and method of making same | |
DE2704087A1 (en) | ELECTRIC BUSBAR SOCKET | |
ATE39792T1 (en) | METHOD OF MAKING AN ELECTRICAL CONTACT WITH TWO CONTACT STRIPS. | |
US3862458A (en) | Pre-assembled terminal screw and washers and method of manufacture | |
US5163223A (en) | Process for making an electrical connector pin having fully rounded contact surfaces | |
DE2506796C3 (en) | Process for the production of a contact element for a multiple socket outlet | |
US4773875A (en) | Electrical contact device and a method for its manufacture | |
US2937434A (en) | Process of manufacturing switch contacts | |
US4932903A (en) | Elastically deformable electric contact elements for incorporation in connectors and methods of manufacturing said contact elements | |
GB1297136A (en) | ||
US2546395A (en) | Method of making electrical connectors | |
US4376334A (en) | Method of making terminal clamp assembly | |
GB1075016A (en) | Method of and tools for making printed circuit boards | |
KR970002439B1 (en) | Method of fabricating an electrical terminal pin | |
US3575034A (en) | Method of forming | |
US5546657A (en) | Method of assembling wiring devices in continuous succession | |
US6051119A (en) | Plating structure for a pin grid array package | |
GB960257A (en) | Improvements in or relating to methods of manufacturing grid plates | |
US3546368A (en) | Construction of electrical contact |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PARAGON ELECTRIC COMPANY, INC., 606 PARKWAY BLVD., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF INCORPORATED, A NJ CORP.;REEL/FRAME:004484/0357 Effective date: 19851112 |
|
AS | Assignment |
Owner name: STATE OF WISCONSIN INVESTMENT BOARD, WISCONSIN Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. (FORMERLY KNOWN AS PECO-TOW RIVERS, INC.);REEL/FRAME:004546/0955 Effective date: 19860319 Owner name: STATE OF WISCONSIN INVESTMENT BOARD, 121 EAST WILS Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. (FORMERLY KNOWN AS PECO-TOW RIVERS, INC.);REEL/FRAME:004546/0955 Effective date: 19860319 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: PARAGON ELECTRIC COMPANY, INC., WISCONSIN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:STATE OF WISCONSIN INVESTMENT BOARD;REEL/FRAME:005463/0773 Effective date: 19900730 |
|
AS | Assignment |
Owner name: BANKERS TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:PARAGON ELECTRIC COMPANY, INC. A CORP. OF WISCONSIN;REEL/FRAME:005758/0169 Effective date: 19900730 |