US4232356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic card frame
Assignee: Unisys Corp
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Filing: 1979-02-07
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Granted: 1980-11-04
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Expires: 1999-02-07
Abstract
Abstract A logic card frame for housing removable printed circuit boards comprises a pair of identical one piece molded half frames that are snapped together, stackable, and slideable from an inserted to a withdrawn position within an associated rack or cabinet. The assembled half frames include integrally molded circuit board guide tracks, each with a groove, a flexure, and a raised portion to guide and prevent vibration of a printed electrical circuit board inserted into a guide track. The base on which the logic card frame is slideably mounted has a ratcheted latch and leaf spring combination for retaining the inserted logic card frame.
Inventors
- 👤 Michael A. Saunders
- 👤 Robert W. Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/14; H05K7/1422; H05K7/1424; H05K7/1425; Y; Y10; Y10S; Y10S174/00; Y10S174/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A logic card frame for housing removable printed circuit boards comprising: a pair of identical one piece molded half frames integrally molded with a multiplicity of circuit board tracks for guiding an inserted printed circuit board; a flexure, integrally molded with the printed circuit board track, that exerts opposing, sideways pressure on a side portion of the inserted printed circuit board in the circuit board track; means for restricting vertical vibration of the inserted printed circuit board; means for locking together the pair of identical one piece molded half frames to form the logic card frame; a mounting base; means on the mounting base for sliding the logic card frame from an inserted to a withdrawn position for exposing and servicing the housed printed circuit boards; means for mounting the logic card frame in a slidable fashion on the sliding means; means for retaining the logic card frame in the inserted position; and means, integral with each identical one piece molded half frame, for stacking multiple logic card frames.
Claim 2
Dependent Claim
169 words
A logic card frame for housing removable printed circuit boards comprising: a pair of identical one piece molded half frames integrally molded with a multiplicity of circuit board tracks for guiding an inserted printed circuit board; a flexure, integrally molded with the printed circuit board track, that exerts opposing, sideways pressure on a side portion of the inserted printed circuit board in the circuit board track; means for restricting vertical vibration of the inserted printed circuit board; means for locking together the pair of identical one piece molded half frames to form the logic card frame; a mounting base; means on the mounting base for sliding the logic card frame from an inserted to a withdrawn position for exposing and servicing the housed printed circuit boards; means for mounting the logic card frame in a slidable fashion on the sliding means; means for retaining the logic card frame in the inserted position; and means, integral with each identical one piece molded half frame, for stacking multiple logic card frames.
Claim 3
Dependent Claim
41 words
The invention of claim 1, wherein the means for retaining the logic card frame in the inserted position comprises means for variably engaging the inserted logic card frame using only a latch and a leaf spring cooperating with the mounting base.
Claim 4
Dependent Claim
97 words
A logic card frame for housing removable printed circuit boards comprising: a pair of identical, one-piece molded half frames integrally molded with circuit board tracks for guiding inserted printed circuit boards; means, integral with each half frame, for locking together the pair of half frames to form the logiccard frame; means, integral with each half frame, for restricting vertical vibration of the inserted printed circuit boards; and means, integral with each circuit board track, for exerting opposing, sideways pressure on a side portion of the inserted printed circuit board to restrict the printed circuit board's horizontal vibration.
Claim 5
Dependent Claim
97 words
A logic card frame for housing removable printed circuit boards comprising: a pair of identical, one-piece molded half frames integrally molded with circuit board tracks for guiding inserted printed circuit boards; means, integral with each half frame, for locking together the pair of half frames to form the logiccard frame; means, integral with each half frame, for restricting vertical vibration of the inserted printed circuit boards; and means, integral with each circuit board track, for exerting opposing, sideways pressure on a side portion of the inserted printed circuit board to restrict the printed circuit board's horizontal vibration.
Claim 6
Dependent Claim
33 words
The invention of claim 3, wherein the means, integral with each circuit board track, for exerting opposing, sideways pressure on a side portion of the inserted printed circuit board comprises a resilient flexure.
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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) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |