US4029388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical terminal constructed to prevent insert molding flash
Assignee: Illinois Tool Works Inc
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Filing: 1976-04-02
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Granted: 1977-06-14
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Expires: 1996-04-02
Abstract
Abstract A flat contact terminal for use in small switches is disclosed which is constructed to prevent flash, or escapement of material from a mold, when the contact terminal is insert-molded into the plastic base of the switch. The contact terminal is deformed to provide angled surfaces on the contact terminal at the upper and lower surfaces of the base where the terminal extends from the base so that the angled surfaces of the contact terminal are wedged tightly against corners of the mold, thereby preventing the escape of plastic material from the mold during molding of the base around the terminal.
Inventors
- 👤 Carl G. Knoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:24
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/40; H01R13/405
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
217 words
A base assembly for an electrical switch comprising a support member of molded plastic material and at least one elongated, substantially flat electrical contact terminal which has first and second substantially straight elongated segments which have first and second opposed sides, each of said elongated segments extending from one of a pair of substantially parallel surfaces of said support member in substantially a normal direction to its associated surface, and first and second substantially straight angled segments, each of which makes an angle with respect to one of said elongated segments and which emerges from said associated surface of said support member, wherein said contact terminals are molded into said support member with a reduced amount of flash by an insert-molding process which is achieved with a mold that is constructed to have a corner for each angled segment that is located on said first side of said elongated segment so as to be tightly wedged against said angled segment at the point where said angled segment emerges from its associated surface of said support member during said molding process and an associated elongated substantially flat area which is located on said second side of said elongated segment so as to be firmly forced against said second side of the associated contact terminal during said molding process.
Claim 2
Dependent Claim
217 words
A base assembly for an electrical switch comprising a support member of molded plastic material and at least one elongated, substantially flat electrical contact terminal which has first and second substantially straight elongated segments which have first and second opposed sides, each of said elongated segments extending from one of a pair of substantially parallel surfaces of said support member in substantially a normal direction to its associated surface, and first and second substantially straight angled segments, each of which makes an angle with respect to one of said elongated segments and which emerges from said associated surface of said support member, wherein said contact terminals are molded into said support member with a reduced amount of flash by an insert-molding process which is achieved with a mold that is constructed to have a corner for each angled segment that is located on said first side of said elongated segment so as to be tightly wedged against said angled segment at the point where said angled segment emerges from its associated surface of said support member during said molding process and an associated elongated substantially flat area which is located on said second side of said elongated segment so as to be firmly forced against said second side of the associated contact terminal during said molding process.
Claim 3
Dependent Claim
28 words
A base assembly for an electrical switch as claimed in claim 1 wherein said angled segments each form one segment of a V-shaped deformation of said contact terminal.
Claim 4
Dependent Claim
54 words
A base assembly for an electrical switch as claimed in claim 1 wherein said first and second angled segments on each contact terminal form a part of a deformation of said contact terminal which is formed so that said angled segments are joined by a segment which is substantially parallel to said elongated segments.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |