Housing arrangements for electrical or electronic equipment

Claim 1

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.