Patent US3906363A successfully refreshed from Google Patents.
US3906363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit board continuity testing device
Assignee: Individual
•
Filing: 1974-09-09
•
Granted: 1975-09-16
•
Expires: 1994-09-09
Abstract
Abstract A test device including a base mounting a multitude of spring wire fingers each extending upwardly through an offset opening formed in a reciprocally mounted biasing plate. Closing movement between biasing plate and base urges the spring finger ends into forceful wiping contact with terminals formed in a perforate printed circuit board being tested. Each of said fingers is in circuit with additional test equipment which verifies the circuit continuity of the board. Means carried by said base limits circuit board travel during a test sequence.
Inventors
- 👤 Richard O Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:23
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/2801; G01R31/281; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/073; G01R1/07307; G01R1/07314; G01R1/07328
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
206 words
A device for testing circuit board continuity, said device comprising in combination, a base including a plate, metallic spring contact fingers mounted on said plate and projecting upwardly therefrom, each of said spring fingers in circuit with supplemental test equipment, upright guides on said base, a finger biasing plate mounted on said upright guides and adapted for reciprocal motion therealong, said biasing plate defining openings therein each having a spring finger therewithin, said biasing plate openings offset to one side from the plate mounted portions of their respective spring fingers so as to cause displacement of each finger during closing movement of said biasing plate towards said base, said biasing plate adapted to temporarily receive a superimposed perforate circuit board to be tested with certain of said perforations constituting board terminals, said certain of the terminal perforations receiving the upper segment of a spring contact finger upon the circuit board being superimposed on said plate, means subjacent the circuit board to limit downward travel of same during closing movement of the biasing plate and base, and said upper segments of the fingers being displaced into positive engagement with their respective terminal perforations in the circuit board during closing movement between said base and said biasing plate.
Claim 2
Independent Claim
206 words
A device for testing circuit board continuity, said device comprising in combination, a base including a plate, metallic spring contact fingers mounted on said plate and projecting upwardly therefrom, each of said spring fingers in circuit with supplemental test equipment, upright guides on said base, a finger biasing plate mounted on said upright guides and adapted for reciprocal motion therealong, said biasing plate defining openings therein each having a spring finger therewithin, said biasing plate openings offset to one side from the plate mounted portions of their respective spring fingers so as to cause displacement of each finger during closing movement of said biasing plate towards said base, said biasing plate adapted to temporarily receive a superimposed perforate circuit board to be tested with certain of said perforations constituting board terminals, said certain of the terminal perforations receiving the upper segment of a spring contact finger upon the circuit board being superimposed on said plate, means subjacent the circuit board to limit downward travel of same during closing movement of the biasing plate and base, and said upper segments of the fingers being displaced into positive engagement with their respective terminal perforations in the circuit board during closing movement between said base and said biasing plate.
Claim 3
Dependent Claim
34 words
The testing device as claimed in claim 1 additionally including limit stop means horizontally offset from one edge of the circuit board to limit displacement of the circuit board by the fingers during testing.
Claim 4
Dependent Claim
23 words
The testing device as claimed in claim 1 wherein the finger receiving openings defined by the biasing plate are of a non-constant diameter.
Claim 5
Dependent Claim
39 words
The testing device as claimed in claim 3 wherein each of said openings defined by said biasing plate is of conical shape terminating at its upper end in a dimension corresponding to the sectional dimension of the spring finger.
Claim 6
Dependent Claim
33 words
The testing device as claimed in claim 1 wherein said biasing plate includes registering means assuring precise placement of the circuit board on the biasing plate thereby assuring spring finger and terminal registration.
Claim 7
Dependent Claim
28 words
The testing device as claimed in claim 1 wherein each of the metallic spring fingers are mounted at their lowermost ends in sockets carried by the base structure.
Claim 8
Dependent Claim
59 words
The testing device as claimed in claim 1 Wherein said upright guides are detachably mounted on said base, said biasing plate and said spring contact finger mounting plate being removable from said base upon guide removal permitting substitution of a second biasing plate and spring contact finger mounting plate permitting testing of other circuit boards having different terminal disposition.
References Cited (Backward Citations)
US3562643A
Cited
US3805159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |