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Trw Limited

Rork S Brown

Brent T Toland

Robert L Hart

An omnidirectional isotropic antenna employing a tubular waveguide 12, a dielectric insert 18 which includes a lens 20 and a depending stem 22. The lens 20 is an elliptoid generated by rotating an elliptoid form about the longitudinal axis 42 of the tubular waveguide 12 with its foci 40 aligned with the longitudinal axis 42 and its major axis 38 lying in a zone of rotation 43 intersecting the horizontal plane 44 that is normal to the axis 42 and containing the foci 40. The stem 22 has integrally formed a polarizing element 36, and an impedance to matching element 21. There is provided a passband filter 50 and a modified tubular waveguide 60 that provides node differences for the RF signals.

Omnidirectional isotropic antenna

A device is disclosed herein for measuring the pressure that a magnetic object exerts which includes a housing having a movable diaphragm held in a taut condition across an internal cavity. A central area of the diaphragm mounts a metallic or magnetic sensitive element operable in response to the presence of a magnetic field to move into and out of the internal cavity to create a detectable and readable pressure level. An analog or digital meter displays the pressure reading. The problem of determining the force exerted by a magnetic field is solved directly.

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Los Angeles, CA, United States of America

Rork S Brown