A novel antenna system disposed around a conveyor belt for the interrogation of objects passing through the antenna which overcomes centralized dead zone problems is disclosed. A frame antenna is disposed around a conveyor belt and is tilted to form, for example, a 30 deg. angle with the vertical longitudinal plane of the conveyor belt, which is perpendicular to the horizontal plane within which the conveyor belt lies, and a 30 deg. angle with the transverse axis of the conveyor belt. In this wa...

To provide broadband directive radiation, a spade-shaped monopole radiator and a backscreen parallel to said radiator are mounted at an angle with respect to a ground plane. Said monopole is fed against ground by an RF source. In a preferred embodiment, according to the same principle, an array of spade-shaped monopoles are mounted parallel to a backscreen and at an angle with a ground plane to provide a steerable radiation pattern. In a preferred one of a number of modifications, spade-shaped m...

The invention comprises methods and apparatus for reducing sub-harmonic cyclic errors by rotating by a small angle an interferometer or elements thereof. The rotation of the interferometer or selective elements thereof introduces a corresponding small angle between a sub-harmonic type spurious beam that subsequently interferes with either the reference or measurement beam so that the fringe contrast of the interference terms between the subharmonic spurious beam and either the reference or measu...

An electric shaver of a vibration type which includes a shaver head portion or upper casing having a movable blade and a screen blade, and arranged to be tilted with respect to a main casing of the shaver, and a trimmer unit adapted to be projected from the main casing in a direction opposite to the tilting direction of the shaver head portion for facilitation of trimming of hair.

The present invention relates to casters of the type in which a roller is rotatably mounted on an axis disposed at an angle of 45.degree. with respect to the vertical and is concerned primarily with certain improvements which improve the service usage and characteristics of such a caster.

This specification discloses a caster in which a roller is rotatably mounted on an axis disposed at 45.degree. to the vertical with the upper portion of the roller being rotatably received in a downwardly opening housing and provided with an outwardly extending flange in the zone of overlapping portions of the roller and housing to exclude foreign matter from the latter and maintain frictional resistance to rotation at a minimum. The bottom wall of the roller is integrally joined to the cylindri...

An enclosed axle, inclined wheel caster including a generally disc like pivot support, or body frame member, which may be flat or dished, carrying an axle and a supporting wheel member rotatably mounted on the axle, both of such members being made from stampings, moulding or forgings and a cover formed of opposed saucers, or cupped members, or combinations of these forms, attached to each of the members to give the swivelable caster a generally enclosed form. As an alternative form of the invent...

In autogenous mills, lifters used on shell and end linings are so constructed with their teeth tilted toward the direction of rotation of the mill in such a way that teeth of lifters statistically coincide to the mean velocity of falling rocks relative to moving lifters.

An enclosed tilted axle caster with an internally mounted brake mechanism includes a caster body, a caster wheel and a braking element of singular resilient construction completely internally disposed within the caster body. A cam element enclosed within the caster body is actuable by an operating pedal which extends out of the caster body for engagement by a foot to move the resilient braking element from its normally biased, released position, to a braking position in which the caster wheel is...

A radome having arrays of thin strips of dielectric material on both the inside and outside walls of a conical shell defined by a sheet of dielectric material for compensating for the polarization dependent phase delay of the radome shell is disclosed. The strips of the outside array are supported edgewise on the outside wall and are normal thereto. The outside strips are equally spaced from each other, and disposed so that the intersection of lines extending therefrom is at the vertex of the sh...