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Magnetically Controlled Electromagnetic Seal

IP.com Disclosure Number: IPCOM000090417D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Steenburgh, JL: AUTHOR

Abstract

Beryllium copper finger stock provides a good contact around the perimeter of closure members of equipment cabinets, where the cabinet is to act as an electromagnetic shield. By fitting the seal members with magnetic elements, a tight seal can be achieved with zero initial insertion force and reduced wear and tear on the seal members. Cabinet frame 10 has cover panel 12 which extends to provide lip portion 14 carrying a permanent magnet strip or row of permanent magnets 16. The corresponding door member 18 carries beryllium copper flexible seal fingerstock strip 20 which carries a row of magnets 22. The magnets 16 and 22 are poled oppositely so that as the edge portions 24 and 26 of the seal members approach each other during a closing motion of cover 18 as indicated by arrow 28.

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Magnetically Controlled Electromagnetic Seal

Beryllium copper finger stock provides a good contact around the perimeter of closure members of equipment cabinets, where the cabinet is to act as an electromagnetic shield. By fitting the seal members with magnetic elements, a tight seal can be achieved with zero initial insertion force and reduced wear and tear on the seal members. Cabinet frame 10 has cover panel 12 which extends to provide lip portion 14 carrying a permanent magnet strip or row of permanent magnets 16. The corresponding door member 18 carries beryllium copper flexible seal fingerstock strip 20 which carries a row of magnets 22. The magnets 16 and 22 are poled oppositely so that as the edge portions 24 and 26 of the seal members approach each other during a closing motion of cover 18 as indicated by arrow 28. Like poles S, S of the respective magnets 16 and 22 are brought into juxtaposition and repel each other. This deflects member 20 downwardly away from edge 24 of cooperating member 12 so that edge portions 24 and 26 do not collide. When 18 moves further into its seated position against edge 24 of panel 12, the magnets are brought into registry so that opposite poles N, S and S, N are in juxtaposition thus drawing flexible seal into its seated position with its edge bead elements 26 bearing tightly against the inner side of panel 12. During reverse, opening motion of cover 18, the sequence of events is reversed, easing the operation. Although th...