Emc Test Systems, L.p.

The Electro-Mechanics Company

Stephen R Kaufman

An electromagnetic radiation seal, particularly adapted for sealing a rotary or linearly movable shaft penetrating a shielded enclosure includes a housing mountable on an enclosure wall and forming a cavity delimited by the housing and the shaft and which is filled with metal particulates, such as tungsten or lead shot pellets. The metal particulates are in intimate contact with the shaft and with the seal housing to prevent transmission of electromagnetic radiation between the interior and exterior of the enclosure at the penetration formed by the shaft.

Electromagnetic radiation seal for a member penetrating a shielded enclosure

An automatic tilt apparatus for use with electromagnetic emission testing devices. The apparatus enables the user to always bore-sight, that is, to point the antenna directly at the object being tested regardless of the height of the antenna. The apparatus utilizes a cam plate to achieve automatic tilting. A threaded rod, connected to the vertical drive mechanism of the testing device converts the rotary motion of the sprocket drive to a horizontal motion. The threaded rod is located within a boom that connects to the testing device. The linear, horizontal motion of the threaded rod causes a first bolt within a slot of the boom to move. A cam plate is attached to the carrier boom via the first bolt and a second bolt which is fastened through an arcuate slot in the cam. The motion of the first bolt causes the second bolt to follow the geometry of the acrucate slot, thus causing The cam plate to tilt in accordance with the vertical height of the testing device. An antenna boom and attached antenna will thus also point at the object being tested regardless of the vertical position of the testing device. Non-metallic materials are used throughout in order to avoid perturbing the electromagnetic field. Cam plates for testing devices uses different test heights can be easily removed and installed.

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Georgetown, TX, United States of America

Stephen R Kaufman