Abstract: A capacitor module having a solid dielectric is cleared in a gaseous environment having an electric strength greater than that of air at a pressure of one atmosphere. A plurality of such cleared capacitor modules is formed into a stack which itself is then cleared by the same clearing process. During intended operation in an electric circuit, the capacitor arrangement would be maintained in such gaseous environment having an electric strength greater than that of air at a pressure of one atmosphere.

Abstract: An apparatus for inspecting a reflective surface of an article for defects includes a point light source for generally uniformly illuminating the entire surface of the article under inspection, and a diffusing screen for intercepting the light rays reflected from the surface under inspection of the article. The intercepted light rays produce a high resolution image on the screen consisting of bright and dark areas or spots corresponding to surface defects in the article under inspection.

Abstract: A device for resisting entry of an object into a space between the hinged edge of a door and associated door jamb includes an elongated sheet of material thin enough to be placed in this space without impeding the closing of the door. The sheet has first and second strips adapted to be fixedly connected within the space to the door and jamb, respectively. A third strip interconnects the first and second strips and coacts therewith to resist entry of objects into the space when the door and jamb are brought together.

Abstract: A controlled depth laser drilling system for a workpiece containing metallic conductors is provided having at least one laser beam (56 and/or 57 of FIG. 5) where a portion of the laser beam (44) will be reflected from the workpiece and back to a drilling depth monitoring means (43) containing optical means capable of reflecting a portion of the original and reflected laser beams into radiation detector means (46', 46" and/or 45', 45"), where the detector means are capable of converting the radiation received into a measurable electrical signals.

Abstract: A vacuum circuit interrupter with primary cup shaped arcing contacts with integral means for arc movement. An auxiliary, generally cylindrical arc contact is spaced about the primary contacts by a dimension less than the spacing between the opened primary contacts. The auxiliary contact includes means for moving the auxiliary path arcs which are formed between the auxiliary contact and the primary contacts with extinguishment of the arc between the primary contacts.

Abstract: A vacuum type circuit interrupter is provided with contacts which include an integral axial magnetic field generating means. In one embodiment, a disc-like contacting portion is supported from the contact base, with a pair of half-turn conductive coil pieces extending between the base and the disc-like contacting portion. In another embodiment, the contacts have a cup-shaped base portion with a radially inwardly directed lip portion at the end of the cup-shaped portion to serve as the normal current carrying contact when the contacts are closed. The lip portions of these cup-shaped contacts are parted when the contacts are moved to the open position and the initial arc travels in a circular path around the annular lip. An auxiliary recessed disc-like contact portion is provided within the space defined by the cup-shaped base contact portion.