US3559604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming swaged contacts using progressive die
Assignee: Elco Corp
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Filing: 1968-08-15
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Granted: 1971-02-02
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Expires: 1988-08-15
Abstract
Abstract The nose section of a printed circuit board connector stamped from a strip of metal has two different thicknesses achieved by progressively piercing a U-shaped hole in the strip to form a cantilevered lug oriented normal to the grain direction, and then swaging the lug to increase its width and reduce its thickness. The U-shaped hole provides clearance for the two dimensional growth of the lug resulting from the swaging operation without affecting the remainder of the strip which is then progressively pierced to form a cantilevered car oriented in a direction parallel to the grain with the swaged lug supported on the free end of the car. The cantilevered car is then progressively bent along the line perpendicular to the grain to turn the lug so that it defines a surface perpendicular to the car thus establishing the wiping finger of the contact.
Inventors
- 👤 Herbert E Ruehleman
- 👤 Peter Slobodzian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:10
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/16; H01R12/00; H01R12/70; H01R12/71; H01R12/72; H01R12/721; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
211 words
The method for progressively forming, from a strip of metal having a grain oriented in parallel to the longitudinal edges of said strip, the nose sections of contacts for a printed circuit board connector, comprising the following steps: a. feeding said strip until a first portion thereof is at a first piercing station; b. at said piercing section forming a U-shaped hole in said strip near a longitudinal edge thereof to form a first cantilevered lug which points towards said longitudinal edge and is perpendicular to said grain orientation; c. feeding said strip until said first portion is at a swaging station; and d. simultaneously (1) piercing a second portion of said strip at said piercing station to form a second cantilevered lug similar to said first cantilevered lug, and (2) swaging said first cantilevered lug at said swaging station to reduce its thickness and increase its width from the free end thereof to a location spaced from the support region for said first lug, said swaging producing a thickness gradient in said lug which is perpendicular to said grain orientation, said U-shaped hole in said strip providing clearance for the increase in width of the lug due to swaging, whereby said swaging will not produce lengthwise distortion of said strip.
Claim 2
Independent Claim
211 words
The method for progressively forming, from a strip of metal having a grain oriented in parallel to the longitudinal edges of said strip, the nose sections of contacts for a printed circuit board connector, comprising the following steps: a. feeding said strip until a first portion thereof is at a first piercing station; b. at said piercing section forming a U-shaped hole in said strip near a longitudinal edge thereof to form a first cantilevered lug which points towards said longitudinal edge and is perpendicular to said grain orientation; c. feeding said strip until said first portion is at a swaging station; and d. simultaneously (1) piercing a second portion of said strip at said piercing station to form a second cantilevered lug similar to said first cantilevered lug, and (2) swaging said first cantilevered lug at said swaging station to reduce its thickness and increase its width from the free end thereof to a location spaced from the support region for said first lug, said swaging producing a thickness gradient in said lug which is perpendicular to said grain orientation, said U-shaped hole in said strip providing clearance for the increase in width of the lug due to swaging, whereby said swaging will not produce lengthwise distortion of said strip.
Claim 3
Dependent Claim
131 words
The method of claim 1, further including the step of feeding said strip until said first portion is at a second piercing station and simultaneously (1) piercing a third portion of said strip at said first piercing station to form a third cantilevered lug similar to said first cantilevered lug, (2) swaging said second cantilevered lug at said swaging station to reduce its thickness and increase its width in a manner similar to the swaging of said first cantilevered lug, and (3) piercing said strip at said second piercing station in the region of support for said first lug to produce a cantilevered ear which points in a direction parallel to said grain orientation so that said first swaged lug will be supported on the free end of said cantilevered ear.
Claim 4
Dependent Claim
159 words
The method of claim 2, further including the step of feeding said strip until said first portion thereof is at a bending station and simultaneously (1) piercing said strip at said piercing station to form a fourth cantilevered lug similar to said first cantilevered lug, (2) swaging said third cantilevered lug at said swaging station to reduce its thickness and Increase its width in a manner similar to the swaging of said first cantilevered lug, (3) piercing said strip at said second piercing station in the region of support for said second lug to produce a cantilevered ear which supports said second lug in a manner similar to that by which said first lug is supported, and (4) at bending station, bending said cantilevered ear supporting said first lug along a line which is perpendicular to said grain orientation and which is located between the support region of said cantilevered ear and said support region for said first lug.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |