Abstract: In a microwave antenna of light weight and small bulk consisting of a reflector and a mirror, the reflector is constructed of vertical combs, horizontal combs and oblique combs. The vertical combs have a pseudo-random distribution with respect to a central comb. The reflector structure has both a shaping function and a supporting function.

Abstract: A method of assemblying an antenna having an interlocking support structure with interlocking nodes, and a meshed radiation mirror includes positioning the support structure in a horizontal position, placing the mirror over the horizontally positioned support structure, and pushing glue through the meshes of the mirror to adhere the meshes to adjacent edges of the interlocking support structure. A second embodiment positions a mold in a horizontal position, the mold having a surface form corresponding to a predetermined form of the antenna mirror. Then, the mirror is positioned on the mold surface form. Glue is placed on the edges of the support structure, and the support structure is then deposited on the mirror with the glued edges contacting the mirror. To assemble the support structure, molds are placed around each and every interlocking node. Glue is then forced into the mold to secure the interlocking node.

Abstract: An automatic silk-screen printing machine including means for synchronized control of movements comprising a relative linear movement between the screen and a doctor blade, a downward movement of the doctor blade and a simultaneous upward movement of the member which holds the object to be printed, characterized by a mechanism for moving the doctor blade holder (14) downwards and upwards, comprising a pivoting arm (15) the pivot point (16) of which is fixed relative to the means for linearly moving the doctor blade, means (18) for yieldingly returning said arm to a position corresponding to the up position of the doctor blade, a member (17) having an abutment plate above said arm, a link (19) the pivot pin (190) of which is integral with said arm and at one end of which is mounted the axle of a wheel (191) bearing against said abutment surface, a rod (20) connected at one end thereof to said link so as to cause it to oscillate about its pivot pin, an electromagnet (21) having a movable member integral with th

Abstract: The machine for serigraphic printing on planar or circular objects is of the type comprising a support block having a device for holding the object to be printed and a printing screen above which is vertically movable ink squeegee is suspended. The screen and squeegee undergo a relative movement of reciprocating translation. The machine comprises an adjustable device for cyclically limiting the reciprocating travel of the screen relative to the squeegee or vice-versa. The adjustable device acts alternately on devices for controlling, lowering or raising the squeegee relative to the screen or vice versa. The adjustable device is moreover coupled to a device for withdrawing the support block. The support block is provided with an ejector of the objects mounted on the support block.

Abstract: An X-ray machine, especially for mammography, includes an X-ray source and a suitable table or support for the object to be examined. The table is transparent to X-rays and holds sheets of X-ray film or the like to record the transmitted radiation. In addition to a fixed diaphragm which defines a substantially pyramidal primary beam, there are provided three sets of beam-defining slits, one behind the fixed diaphragm, one ahead of the object of examination and one just ahead of the recording medium. These three slits are disposed in geometrical similarity, i.e., their free width increases in proportion to their distance from the source. Furthermore, each of these slits is movable in a plane normal to the main axis of the primary beam. The three slits together define a narrow angular portion of the primary beam and their motion is so coordinated that the narrow beam is scanned across the object from one extreme position to the other.