Housing arrangements for electrical or electronic equipment
AssigneeGeneral Electric Company
InventorsAlwyn Finney, Michael Whitlam
Life of this patent
Estimating the term…
Abstract
A housing arrangement for equipment, such as telephone exchange equipment or transmission equipment, in which individual circuit units are formed on printed circuit boards mounted side-by-side on a shelf unit, wherein the shelf unit forms a first electromagnetic screening enclosure, and interconnections between said circuit units, external connections to those units, are made by way of a second electromagnetic screening enclosure having one face in common with the first enclosure.
Claims3
A housing arrangement for electrical equipment providing electromagnetic screening for said electrical equipment at frequencies up to a predetermined upper frequency, comprising:
- first and second electromagnetic screening enclosures;
- fixing means utilized in assembling said enclosures which are spaced at intervals less than the wavelength of said upper frequency;
- a plurality of carrier means for units of said electrical equipment, each said carrier means including a front cover and respective first connector means;
- means detachably to mount said carrier means within said first enclosure such that said front covers of said plurality of carrier means together make up a substantially electrically continuous front panel of said first enclosure;
- an electromagnetic screening member forming a rear face of said first screening enclosure and at least part of a front facing surface of said second screening enclosure;
- a plurality of second connector means co-operable with respective first connector means to extend connections from respective units of electrical equipment on respective carrier means in said first enclosure into said second enclosure;
- means to mount external connection means on said forward facing surface of said second enclosure;
- and means within said second enclosure to make connections between respective second connector means and said external connection means.
Dependencies are inferred from the claim text.