Source: http://www.google.com/patents/US4640979?dq=6284345
Timestamp: 2017-04-30 21:33:48
Document Index: 598760492

Matched Legal Cases: ['art.\n4', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1', 'art 1']

Patent US4640979 - Radio-frequency-tight shield with planar parts - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn RF shield of electronic devices for example, a covering for electrical equipment which includes frame and panel structures having planar parts characterized by a spring element being assembled on the planar part to insure contact between the part and another part. The spring element has a pair of...http://www.google.com/patents/US4640979?utm_source=gb-gplus-sharePatent US4640979 - Radio-frequency-tight shield with planar partsAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS4640979 APublication typeGrantApplication numberUS 06/630,194Publication dateFeb 3, 1987Filing dateJul 12, 1984Priority dateAug 5, 1983Fee statusLapsedAlso published asDE3328386A1, EP0133555A2, EP0133555A3, EP0133555B1Publication number06630194, 630194, US 4640979 A, US 4640979A, US-A-4640979, US4640979 A, US4640979AInventorsDieter SchmalzlOriginal AssigneeSiemens AktiengesellschaftExport CitationBiBTeX, EndNote, RefManPatent Citations (3), Referenced by (18), Classifications (6), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetRadio-frequency-tight shield with planar parts
US 4640979 AAbstract
An RF shield of electronic devices for example, a covering for electrical equipment which includes frame and panel structures having planar parts characterized by a spring element being assembled on the planar part to insure contact between the part and another part. The spring element has a pair of end portions connected by a center portion which has a convex configuration and the end portions have hook-like portions for securing the spring to the planar part by being inserted in a pair of spaced apertures or for engaging an edge of the part and an edge of an aperture. The hook end portion can extend in the same direction and one portion can include a 180° bend to lock the spring on the part. The convex center portion can be a smooth convex curve or it can be a sharp triangular-shaped bend.
1. In a radio-frequency-tight shield for electronic devices, said shield including a frame and panel structure with planar parts, the improvement comprising one of the planar parts having at least one spring element being assembled thereon, said spring element having a center contact portion extending between two end portions, said end portions being bent to form hook-shaped sections for engaging spaced edges formed on the one planar part, said spring being assembled on the one planar part with the center contact portion extending beyond a surface of the one planar part and the hook-shaped sections of the end portions engaging said edges and forming detents to prevent the spring element from becoming removed from the one planar part.
4. In a radio-frequency-tight shield according to claim 1, wherein one of the end portions has a reverse bend of 180° so that a leg of the one end portion extends alongside the center contact portion to prevent disengagement of the spring from the planar part.
The present invention is directed to a radio-frequency-tight shield of electronic devices, particularly electronic devices of the data industry, which shield utilizes a frame and panel construction having planar parts or surfaces.
The object of the invention is to create an easily interchangeable contact part for the frame and sheet parts of a radio-frequency proof shielding or shield for an electronic device.
In a still further embodiment, the end portion of one end is passed around an edge of the part or is passed through and around an edge of an aperture in the part and is bent through 180° to extend past the arcuate center portion to prevent the spring from becoming disconnected from the part. In this embodiment, the center section has approximately a triangular or V-shaped configuration.
In another embodiment, one end portion has a leg connected by a 180° bend to the center portion. The leg extends in the same direction as the other end portion and terminates in a hook to engage an edge of the aperture through which the other end portion extends. Thus, in this embodiment, the ends are isodirectional and proceed parallel to the inside of the planar part.
FIG. 1 is a cross-sectional view with portions in elevation of an embodiment of a spring in accordance with the present invention;
The principles of the present invention are particularly useful when incorporated in a spring 2 for use with a panel or part 1 having a planar portion or surface. The spring 2 has a center portion 14 which is connected to a pair of end portions 3. As illustrated, the center portion 14 has a convex configuration which curves away from a web 7 which extends between the apertures 5. The end portions 3 have a Z shape formed by a pair of bends and are inserted into a pair of spaced apertures 5 in the member or part 1. In the relaxed condition as illustrated, the spring 2 has its ends 3 hooked into the apertures 5 and thus is retained against falling out. When assembling the planar part or member 1 to a frame member 40, the convexity of the portion 14 can be pressed flat against the web 7 by a pressure in the direction of arrow 4. A contact pressure thus will occur between the planar part 1 and the member 40 to which it is being joined. The two Z-shaped end portions 3 still maintain hooked within the part 1 and maintain a stable position for the spring. As illustrated, the Z-shaped end portions 3 are mirror images of each other and are symmetrical to each other about the axis of the spring 2.
Another or second embodiment of the spring is illustrated by the spring 2a in FIG. 2. The spring 2a has a convex portion 14a similar in shape to the portion 14 of the embodiment of FIG. 1. The convex portion 14a has two short outwardly extending legs 15 and 16 with the leg 15 being connected to an end portion 3a and the leg 16 being connected to an end portion 3a'. Both the end portions 3a and 3a' have an obliquely extending portion or tab 18 and both the portions 3a and 3a' extend in the same direction. The leg 15 and the end portion 3a form a 180° bend 17 whereas the leg 16 and the end portion 3a' form a Z-shaped bend.
A third embodiment of a spring in accordance with the present invention is illustrated at 2b in FIG. 3. The spring 2b has a contact center portion 14b which is illustrated as a V-shaped configuration, that extends through an aperture such as 5 in the planar part 1. The contact portion 14b is disposed between end portions 3b and 3b'. As illustrated, the end portion 3b has a short oblique portion and the end portion 3b' has a 180° bend 17b with an elongated leg 19 which extends back past the contact portion 14b. As illustrated, the spring 2b has the end portion 3b' wrapped around an edge 6 of the planar part 1. However, it can be wrapped around an edge of an aperture similar to 5. It is noted that the leg 19 coacts with the contact portion 14b to prevent the spring from accidentally being removed from the part 1.
Another or fourth embodiment is a spring 2c which is illustrated in FIG. 4. In this embodiment, a contact portion 14c has a V shape and has end portions 3c and 3c'. As illustrated, the end portion 3c' and 3c both extend in the same direction as in the embodiment of the spring 2a of FIG. 2. It is noted that the portion 3c' forms a 180° bend with the adjacent portion of the contact portion 14c. In addition, the end portion 3c' ends in a tab 20 which engages an edge of an aperture through which the end portion 3c extends so that the end portion 3c' engages the web lying between the two apertures or an edge and an aperture.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2042982 *Aug 27, 1934Jun 2, 1936Chaney John LThermometerUS3277230 *Mar 17, 1965Oct 4, 1966Instr Specialties Co IncShielding gaskets with fastening meansUS3504095 *Jan 30, 1968Mar 31, 1970Instr Specialties Co IncShielding gaskets* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS4762966 *Jun 26, 1987Aug 9, 1988Rockwell International CorporationElectromagnetic signal interference shielding gasket apparatusUS5047898 *Nov 13, 1989Sep 10, 1991International Business Machines CorporationDeflectable contact for providing positive surface contact for shielding electromagnetic interferenceUS5138529 *Nov 30, 1990Aug 11, 1992Compag Computer CorporationSupportive ground clip for computer system boardUS5142447 *Oct 27, 1989Aug 25, 1992International Business Machines CorporationGrounding apparatus for rail-mounted devices employed in a computerUS5218760 *May 1, 1992Jun 15, 1993Compaq Computer CorporationMethod of grounding a computer system boardUS5313016 *Oct 19, 1992May 17, 1994Synoptics Communications, Inc.Auto-insertable electromagnetic interference ground clipUS5596170 *Nov 9, 1993Jan 21, 1997International Business Machines CorporationFlexible dome electrical contactUS5934915 *Dec 14, 1995Aug 10, 1999Telefonaktiebolaget Lm EricssonGrounding and screening deviceUS5949019 *Nov 7, 1997Sep 7, 1999Nokia Telecommunications, OyMetal equipment cabinet having shielding structure for suppressing electromagnetic radiation therefromUS6547607 *Jan 8, 2001Apr 15, 2003Multi-Holding AgContact elementUS6863547 *May 1, 2003Mar 8, 2005Averatec Asia IncorporationMethod for suppressing electromagnetic interference of electronic device and electronic device with suppressed electromagnetic interference by the methodUS7946854Jul 21, 2009May 24, 2011Tyco Electronics CorporationElectrical connector assembly having shield memberUS9379491 *Feb 10, 2015Jun 28, 2016Samsung Electronics Co. Ltd.Electrical connecting deviceUS20040219842 *May 1, 2003Nov 4, 2004Hee-Keun ParkMethod for suppressing electromagnetic interference of electronic device and electronic device with suppressed electromagnetic interference by the methodUS20070284142 *Jun 8, 2006Dec 13, 2007Dot Hill Systems CorporationEmi/rfi finger clip gasketUS20110021042 *Jul 21, 2009Jan 27, 2011Tyco Electronics CorporationElectrical connector assembly having shield memberUS20150229076 *Feb 10, 2015Aug 13, 2015Samsung Electronics Co., Ltd.Electrical connecting deviceWO1994030035A1 *Jun 2, 1994Dec 22, 1994Nokia Telecommunications OyInsulator means for suppressing interference radiation in an electric field* Cited by examinerClassifications U.S. Classification174/366, 439/92, 361/818International ClassificationH05K9/00Cooperative ClassificationH05K9/0016European ClassificationH05K9/00B2BLegal EventsDateCodeEventDescriptionJul 12, 1984ASAssignmentOwner name: SIEMENS AKTIENGESELLSCHAFT, BERLIN AND MUNICH, A GFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCHMALZL, DIETER;REEL/FRAME:004289/0791Effective date: 19840628Owner name: SIEMENS AKTIENGESELLSCHAFTFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHMALZL, DIETER;REEL/FRAME:004289/0791Effective date: 19840628Sep 4, 1990REMIMaintenance fee reminder mailedFeb 3, 1991LAPSLapse for failure to pay maintenance feesApr 16, 1991FPExpired due to failure to pay maintenance feeEffective date: 19910203RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services