US3904937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit module rack and chassis assembly
Assignee: TDK Micronas GmbH
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Filing: 1974-04-12
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Granted: 1975-09-09
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Expires: 1994-04-12
Abstract
Abstract A combination electric circuit module and chassis assembly for use in mobile communication carriers and methods for forming both the assembly and the module wherein the chassis has a front casing and a back casing interconnected by means of a support enclosure, and wherein a plurality of radio modules are removably mounted upon shelves within the chassis. Each of said modules comprises a continuous extruded and shaped frame. The crosssection of the frame integrally includes a series of continuous grooves for containing a pair of covers, two separate radio interference gaskets, an electric circuit board and a guiding groove for inserting each module within the chassis. The combination electric circuit module and chassis provides good radio frequency insulation shielding properties for the enclosed circuitry and convenient access to each circuit board for removal and repair thereof.
Inventors
- 👤 Herbert L Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:45
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
295 words
An electric circuit module and chassis assembly for rack mounting in mobile communication carriers comprising in combination: a chassis having front and back casings, the front casing comprises top, bottom and side members integrally structured to form a hollow frame including a plurality of horizontal crossmembers integrally formed within and extending between said side members for providing support to at least one circuit module when mounted thereon, a front rectangular lip extending outward along the entire frame, a pair of side projections, one projection extending vertically along each of said side members, said pair of projections providing means for connecting the assenbly within the mobile carriers, and a rear rectangular lip extending along the entire frame to provide a surface for connecting an enclosure thereto, the back casing comprises top, bottom and side members integrally structured to form a hollow frame and complementarily arranged relative to said front casing; a continuous rectangular enclosure member comprising top, bottom and side sections enclosing said front and back casings to provide a supporting enclosure for said front and back casings; a plurality of shelves mounted within said enclosure member and interconnecting said front and back casings, each of said shelves containing at least one upwardly extending rail member for slidingly engaging at least one corresponding groove in at least one circuit module thereon; and a plurality of circuit modules removably mounted upon said shelves, each of said modules comprising an integrally constructed U-shaped member wherein the sides of said U-shaped member constitute the sides of each module, and the base of said U-shaped member constitutes the back section, each of said modules containing at least one electric circuit board removably attached therein, each of said modules having a groove which slidably engages with each of said rail members
Claim 2
Dependent Claim
295 words
An electric circuit module and chassis assembly for rack mounting in mobile communication carriers comprising in combination: a chassis having front and back casings, the front casing comprises top, bottom and side members integrally structured to form a hollow frame including a plurality of horizontal crossmembers integrally formed within and extending between said side members for providing support to at least one circuit module when mounted thereon, a front rectangular lip extending outward along the entire frame, a pair of side projections, one projection extending vertically along each of said side members, said pair of projections providing means for connecting the assenbly within the mobile carriers, and a rear rectangular lip extending along the entire frame to provide a surface for connecting an enclosure thereto, the back casing comprises top, bottom and side members integrally structured to form a hollow frame and complementarily arranged relative to said front casing; a continuous rectangular enclosure member comprising top, bottom and side sections enclosing said front and back casings to provide a supporting enclosure for said front and back casings; a plurality of shelves mounted within said enclosure member and interconnecting said front and back casings, each of said shelves containing at least one upwardly extending rail member for slidingly engaging at least one corresponding groove in at least one circuit module thereon; and a plurality of circuit modules removably mounted upon said shelves, each of said modules comprising an integrally constructed U-shaped member wherein the sides of said U-shaped member constitute the sides of each module, and the base of said U-shaped member constitutes the back section, each of said modules containing at least one electric circuit board removably attached therein, each of said modules having a groove which slidably engages with each of said rail members
Claim 3
Dependent Claim
44 words
The assembly of claim 1 further including at least one door hingeably mounted relative to the front casing and radio frequency interference gasket means mounted on the door in order to produce a radio interference shield when said door is closed against said casing.
Claim 4
Dependent Claim
65 words
The assembly of claim 1 wherein the rear casing is made from a single metal casting which includes a cooling fan mount integrally formed within said casing in order to provide support means for a cooling fan, a transformer mount to provide support for a transformer, and a manifold integrally formed within said casting to direct the air flow therefrom by means of said manifold.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |