Abstract: An electric fuse having plug terminals. The fusible elements are connected to the plug terminal by the intermediary of metal strips having three sections. One section is inserted into the grooves of the plug terminals and conductively connected with the latter. Another section is arranged in a plane parallel to, but spaced from, the plane defined by said first mentioned section. A third section of the metal strips conductively interconnects the first section and the second section thereof.

Abstract: A shaft sealing precluding fluid from moving in a direction longitudinally of the shaft. At the same time the shaft sealing allows a motion of the shaft in axial direction, an inclination of the shaft, and may also allow a rotary motion of the shaft relative to its sealing means. The sealing means is a rolling diaphragm including a clamping flange on one end of the rolling wall thereof. There is a difference of pressure to either side of the rolling wall of the diaphragm. Its shaft has a predetermined outer diameter, and its radially inward directed bottom has a central bore therein equal to the predetermined outer diameter of the shaft. A tubular member having an inner diameter equal to the outer diameter of the shaft is mounted on the shaft. That tubular member has an outer diameter of such thickness as to engage a length of the rolling wall of the rolling diaphragm.

Abstract: An electric fuse the fusible element of which is arranged off-center of the casing. The fuse casing is closed by caps through the end surfaces of which the knife blade contacts project into the casing. The spacing of the end surfaces of the caps to the axially inner ends of the blade contacts is substantially equal. Each of the axially inner ends of the blade contacts is conductively connected to the fusible element by the intermediary of a flexible metal strip having a smaller cross-section than each of the blade contacts. This imparts a relatively great flexibility to the unit including the blade contacts, the flexible metal strips and the fusible element.

Abstract: An electric fuse including blade contacts projecting through the terminal caps into the casing. The axially inner ends of the blade contacts are conductively connected by electroconductive elements to the axially outer ends of the fusible element. The electroconductive elements each comprise a first planar arm conductively affixed to one end of the fusible element, a second planar arm arranged parallel to and spaced from said first planar arm and conductively affixed to one end of the blade contact, and tie means integral with said first and said second arm conductively connecting the axially outer end of said first arm to the axially inner end of said second arm.

Abstract: A self-aligning seal for minimizing, or entirely suppressing, the flow of a fluid in a direction generally longitudinally of a shaft subjected to axial motions and to tilting motions in any direction. The seal comprises a shaft, a bushing surrounding said shaft, a convoluted diaphragm having radially inner support means affixed to said bushing and radially outer support means affixed to a fixed structure. The bushing has abutment means limiting the relative movement of bushing and shaft. The bushing has preferably externally the shape of a frustum of a cone which facilitates connecting the radially inner end of the convoluted diaphragm to the bushing. The bushing may also be provided with elastomeric sealing means such as an "O" ring precluding the flow of fluid through the narrow gap formed between the shaft and the shaft-receiving bore of the bushing.

Abstract: A sub-assembly for electric fuses comprising a perforated fusible element having a pair of ribbon ends. The ribbon ends are bent around the rims of the casing from the inside to the outside of the casing. In fuses including such a sub-assembly one of the ends may be pre-bent, i.e. bent prior to insertion of the fusible element and its pair of ends into the casing. The other end or non-pre-bent end, must be bent around one of the rims of the tubular casing to the outer surface thereof preparatory to the mounting of the terminal caps, or ferrules, on the casing. This bending operation may involve great difficulties, particularly if the pair of ends have great dimensional stability, and the perforated fusible element portion is relatively frail, and tends to be twisted and/or otherwise deformed when one of the pairs of ends is bent around the rim of the casing to the outer surface thereof.

Abstract: Fuses having different ratings, all of which comply with the Standard for Class L fuses of the Underwriters Laboratories Inc.The fusible elements of the fuses have identical points of reduced cross-section which fuse simultaneously on major fault currents, except one point of reduced cross-section which fuses ahead of the others.A relatively large temperature gradient prevails between the aforesaid points of reduced cross-section that fuse on short circuit current and the M-effect low fusing point overlay of the copper links that severs the current path through the latter by a diffusion process. The M-effect overlay metal may just reach its fusing point, while the immediately adjacent points of reduced cross-section may have a much higher temperature, e.g. 300.degree. to 400.degree. C. Thus the fusing M-effect metal will flow to the point of higher temperature and a rapid severing of the latter will take place.

Abstract: A fusible element for electric fuses based on M-effect, i.e. the severing of a high fusing point base metal by a low fusing point overlay metal by a process of metal interdiffusion. The M-effect, or Metcalf effect, as widely used in electric fuses, has a main limitation consisting in requiring too long periods of time for severing the base metal. The problem of severing the base metal by the overlay metal in shorter times is solved, according to this invention, by arranging the overlay metal on the front side and on the rear side of the base metal, in spaced relation to a point of reduced cross-section of the base metal.While the invention is applicable to all M-effect fuses, it is of particular importance in regard to Standard for Class L fuses of the Underwriters Laboratories Inc. which have fusible elements that are of copper, as distinguished from Class L fuses having fusible elements of silver, or Class L fuses having fusible elements in part of copper, and in part of silver.

Abstract: A non gas evolving insulating support of generally star shaped X-sect for supporting the turns of a helically wound fusible element is provided with gas evolving means affixed thereto in proximity with but spaced from the fusible element.

Abstract: A fusible element for electric fuses combining considerable time lag with current-limiting action. Time lag is achieved by providing the fuse with a combination of a plurality of means for achieving this end, such as folding the perforated center portion of the fusible element twice in a direction longitudinally thereof to achieve mutual heating of the folded portion, providing the center portion with end portions or heat dams of reduced cross-section which limit the flow of heat from the center portion to the terminals of the fuse, and are folded in transverse direction, and providing the fusible element with means capable of severing the fusible element by a metallurgical reaction, widely known as M-effect. The M-effect means increase time lag because of their mass and because they derate the fusible element. They cause severing of the center portion of the fusible element and are heated, in addition to i.sup.2 .multidot.

Abstract: A pneumatic relay, and more particularly a pneumatic reversing relay, wherein the output decreases with increasing signal pressure. The relay is of the rolling diaphragm type, each rolling diaphragm including a radially outer clamping flange, a radially inner clamping flange and an intermediate rolling wall. Means are provided for securing clamping flanges of the rolling diaphragms against pull-out, creep and relaxation of clamping forces. The valve has a freely floating valve stem having a high degree of pneumatic stability combined with low stem friction. The freely floating operation is obtained by means of an "O" ring surrounding the valve stem and a baffle plate deforming the "O" ring. The relay includes a bias spring whose bias is controlled by the deformation of a metal bonnet housing the bias spring. Spring retainer caps transmit the deformation of the bias spring in a precise and stable manner.

Abstract: A fusible element for electric fuses capable of combining time-lag in the range of overload currents with current-limiting action for currents in the range of short-circuit currents. The fusible element comprises a relatively wide perforated center section and axially outer heat dam sections. The center section has points of reduced cross-section imparting to it a predetermined fusing i.sup.2 .multidot.t. The center section of the fusible element is folded in a direction longitudinally thereof to effect mutual heating of the portion, or portions, thereof to different sides of the fold, or folds. This allows to increase the mass of the center section and results in an increase of time-lag. Relatively narrow heat-dam-strip sections extend from the ends of said center section. The fusing i.sup.2 .multidot.

Abstract: A solderless pressure contact between a cap or ferrule of a fuse and the end of a fusible element that has been bent around the rim of the casing of the fuse from the space inside the casing to the outer surface thereof. A normal ferrule is used, i.e. a ferrule having a planar end surface rather than one having an end surface projecting into the casing of the fuse. The side wall, or lateral wall, of the ferrule is provided with a tab being hingedly supported at the axially inner end thereof by the lateral wall of the ferrule. The aforementioned tab slants from its point of support by the lateral all of the ferrule, or from the axially inner end thereof, axially outwardly and radially inwardly into firm engagement with the end of the fusible element on the outer surface of the casing. This pressure contact requires the use of casings which are electically deformable according to Hooks law, or have a memory, i.e. tend to assume their original shape after having been deformed.

Abstract: An electric fuse for elevated circuit voltages, such as, e.g. 5 to 15 KV. It includes a tubular casing or electric insulating material, terminal elements and a pulverulent arc-quenching filler. It further includes a plurality of equidistantly spaced fusible elements electrically connected in parallel, wound substantially helically in planes defining a prism and forming part of a current path conductively interconnecting the pair of terminal elements.The point of novelty consists in that the fusible elements are formed by a unitary metal stamping. That stamping also includes aligned metal bridges conductively interconnecting all the fusible elements. The preferred number of planes or sides of the aforementioned prism is four and the preferred number of bridges is n-1 for each quarter turn of the fusible elements, wherein n is the number of fusible elements connected in parallel. The bridges are arranged in spaced relation from the edges of the prism.

Abstract: A shaft sealing precluding fluid from moving in a direction longitudinally of the shaft. At the same time the shaft sealing allows a motion of the shaft in axial direction, an inclination of the shaft, and may also allow a rotary motion of the shaft relative to its sealing means. The sealing means is a rolling diaphragm including a clamping flange on one end of the rolling wall thereof. The other end of the rolling diaphragm is provided with a cylindrical elastomeric member having a projection conforming substantially with the shape of a portion of reduced diameter of the shaft and engaging under pressure said portion of reduced diameter.

Abstract: The invention is predicated on the use of synthetic resins as materials for fuse casings or fuse tubes because synthetic resins are relatively easily deformable. This invention is particularly applicable in connection with fuse tubes made of polyester resin and glass fibers. Such tubes lend themselves to making solderless fuse terminals, i.e. electrically conductive joints between the ferrules, or fuse caps, and the fusible element, or elements, inside the fuse tube. The fusible element is located inside the casing or fuse tube and bent over the rim thereof, and has a portion that engages the outer surface of the casing.

Abstract: A device for use in inserting an electric fuse into an electric circuit including a pair of cable connectors, fasteners which anchor themselves on one end by a self tapping screw to an insulating base, form spacers between said base and the pair of cable connectors, and a threaded machine screw on the other end to affix a fuse to said pair of cable connectors.

Abstract: The current path of an electric indicating or striker pin fuse, and more particularly its fusible element, includes a point of maximum resistance where fusion of the latter must take place. That predetermined point is arranged in such a way that the pulverulent arc-quenching filler does not impair the proper operation of the indicating or striker pin device.

Abstract: A video game system for simulating the functions of vehicles or groups of vehicles represented by spots on the screens of television sets or television projectors controlled by individual control sets is provided. The control sets and television sets are connected to a common central control for the supervision of presence of a vehicle within the field of visibility of another vehicle, whereby the representation of both vehicles on the screens of both concerning television sets is performed.

Abstract: An electric fuse has rod supports for the helically wound fusible element which are of a laminate of glass cloth and a synthetic resin. This is a material which is slightly gas evolving. The rods have inserts of a material which is highly gas evolving, and they provide a substantial spacing between the path of the fusible element--and the arc path--and the surface of the rod supports for it. The limited gas evolving capacity of the rods combined with the large gas evolving capacity of the inserts and combined with the spacing between the arc path and the surface of the rods allows proper operation of the fuse in the absence of any ceramic insulators or ceramic supports for the fusible element.