Electromagnetic shield for printed circuit board
AssigneeInstrument Specialties Co., Inc.
InventorsWilliam H Stickney, Ronald W. Brewer
Life of this patent
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Abstract
An electromagnetic shield includes electrically conductive walls arranged to form a closed boundry. The walls include pins projecting from a lower edge to secure the shield on a printed circuit board and to provide a connection to a conducting layer in the printed circuit board and engagement prongs on the upper edge to engage a cover plate.
Claims29
An electromagnetic shield, comprising:
- electrically conductive walls arranged to form a closed frame;
- means projecting from a lower edge of the walls for engaging with a printed circuit board;
- deflectable engagement prongs extending from an upper edge of the walls;
- and
- an electrically conductive cover having dimensions similar to those of the closed frame engaged within said engagement prongs;
- wherein the walls and engagement prongs are outwardly deflectable to allow for insertion and removal of the cover.
A component of an electromagnetic shield, comprising:
- a strip of electrically conductive metal;
- means projecting from a first edge of the strip for engaging with a printed circuit board, said means projecting substantially perpendicularly to a center line of the strip;
- and
- a plurality of engagement prongs defined by a plurality of slots extending through a second edge of the strip in a direction substantially perpendicular to the center line of the strip;
- wherein the engagement prongs each have an outward curve forming a recess for engaging a cover plate.
A component of an electromagnetic shield, comprising:
- a strip of electrically conductive metal;
- means projecting from a first edge of the strip for engaging wiht a printed circuit board, said means projecting substantially perpendicularly to a center line of the strip;
- and
- a plurality of engagement prongs defined by a plurality of slots extending through a second edge of the strip in a direction substantially perpendicular to the center line of the strip;
- wherein the metal strip comprises a lower half which includes the first edge and an upper half which includes the second edge, said upper half having a thickness less than the thickness of the lower half.
A method of assembling an electromagnetic shield, comprising the steps of:
- providing a strip of electrically conductive metal having pins extending from one edge thereof and engagement prongs extending form an opposite edge thereof;
- cutting the strip into a preferred length;
- forming the strip into a closed frame;
- inserting the pins into holes in a printed circuit board;
- and
- engaging a cover within the engagement prongs.
A component of an electromagnetic shield comprising:
- a strip of electrically conductive metal;
- means projecting from a first edge of the strip for engaging with a printed circuit board, said means projecting substantially perpendicularly to a center line of the strip;
- a plurality of engagement prongs defined by a plurality of slots extending through a second edge of the strip in a direction substantially perpendicular to the center line of the strip, wherein the engagement prongs have greater deflectability than the strip;
- and
- reinforcing means in the strip for reducing the deflectability of the strip.
A component of an electromagnetic shield, comprising:
- a strip of electrically conductive metal;
- means projecting from a first edge of the strip for engaging with a printed circuit board, said means projecting substantially perpendicularly to a center line of the strip;
- a plurality of engagement prongs defined by a plurality of slots extending through a second edge of the strip in a direction substantially perpendicular to the center line of the strip;
- and
- aperture means provided at the end of said slots for increasing the deflectability of the engagement prongs, said aperture means having a width greater than the width of said slots.
Dependencies are inferred from the claim text.