Abstract: An electric fuse having a plurality of fusible elements connected in parallel. The fusible elements extend from the center region of one of the ferrules to the region of the other of the ferrules coextensive with one of the rims of the casing of the fuse. The ends of the fusible elements are conductively connected to the axially inner end surfaces of the ferrules. The plurality of fusible elements is formed by a self-sustained structural unit adapted to be telescoped in one single operation into the casing of the fuse, thus greatly facilitating the assembly of the fuse.

Abstract: A blown fuse indicator is supported by a socket separate from the casing of the fuse whose blowing the indicator is supposed to indicate. The indicator includes an indicating pin of relatively large size under the bias of a relatively powerful helical spring. The pin is biased in a direction at right angles to the longitudinal axis of the fuse, or of its casing, respectively. Normally the pin is restrained by a latch projecting into a recess in the lateral wall of the pin. The latch is spring biased in the pinrestraining position thereof. When the bias of the latch is overcome by an external force, the pin moves to the indicating position thereof.

Abstract: An electric fuse has helically wound fusible element means which are supported by a mandrel made up of insulating plates. The latter engage grooves provided in terminal plugs of the fuse. The mandrel-forming plates are locked in position inside said grooves by cooperating abutment means. These abutment means are formed by recesses in the mandrel-forming plates, and by projections formed by displaced portions of the metal of which the plug terminals of the fuse are made, which portions enter into said recesses in said mandrel-forming plates and preclude relative movement of the latter and the plug terminals.

Abstract: An electric fuse has an undulated fusible element provided with a plurality of aligned, spaced perforations. A straight rod preferably of a gas-evolving material extends through said plurality of perforations. The rod increases significantly the dimensional stability of the fusible element structure and contributes at the same time significantly to arc-extinction, if made of a gas-evolving material.

Abstract: An Electric Door Strike is disclosed wherein a notch is provided in a strike frame for receiving a latch or a dead bolt. A pivoting shutter is positioned adjacent the notch and is pivotable between an open position to admit the dead bolt when the latter is in its extended position, and a closed position wherein the notch receiving the dead bolt is partially covered. In the closed position the dead bolt may not be withdrawn from the strike frame except by being withdrawn into the door lock mechanism. The shutter is mounted on the shaft of a rotary solenoid which, when energized, pivots the shutter to the open position. A stop pin is secured to the shutter and engages a mating detent in the strike frame when the shutter is closed to prevent the shutter from being forced open from a position externally of the door.

Abstract: An interrupter for internal combustion engines includes fixed reed-switch type contact means which are caused to be opened and closed at the proper points of time by means of magnetic fields generated by a rotatable formed by magnetic particles and an insulating binder and armature having alternating magnetic field zones and zones which do not produce significant magnetic fields. The reed-switch contact means are enclosed in a multifunction housing.

Abstract: A fuse for elevated circuit voltages is provided with first fusible element means having a relatively low resistance and wound substantially helically around a mandrel formed of insulating plates. The fuse is provided with a spring-biased blown fuse responsive device for indicating whether or not the fuse has blown, or for tripping a switching device with relatively movable contacts, e.g. a disconnect. The blown fuse responsive device is under the control of a second fusible element means which has a relatively high resistance. Said second fusible element means includes a plurality of spaced sections forming therebetween a voltage-responsive break-down spark gap. The mandrel for supporting the first fusible element has a perforation immediately adjacent the end thereof at which the blown fuse responsive device is arranged. Two contiguous sections of the second fusible element are spaced from each other and form a voltage responsive break-down spark gap.

Abstract: A high-voltage fuse having a pair of axially spaced paper labels at the relatively cool ends thereof remote from the plateau-like high temperature zone formed by the fuse when carrying current.

Abstract: A station direct station selection system is provided with a time division multiplex signalling line which carries all the signals that are required to establish and to terminate connections. The control means for establishing and terminating connections are decentralized and arranged mainly at the locations of the subscriber stations and at the locations of the line transmissions.

Abstract: A tamper-proof bottle stopper intended to be used for closing wine bottles. The stopper means is of a composite nature and includes a stopper body having an integral upper flange portion which is situated in the closed position above the annular end surface of the neck of a bottle and abuts against the latter when the stopper body proper is pressed into the neck. The upper portion of the stopper body is corrugated or fluted on the radially outer surface thereof. The stopper body defines a cavity open at the upper end and closed at the lower end into which a gas-tight stopper insert is placed. The composite stopper means further includes a fluted cap that engages and coacts with the fluted portion of the stopper body so as to prevent a rotary motion of the cap relative to the stopper body. The cap is provided with a skirt projecting downwardly on the outer surface of the neck of a bottle.

Abstract: A flexible torque-transmitting element for tying the driven member of a flexible coupling to the driving member thereof includes a body of flexible material (such as rubber, or another elastomer) that has a rim zone. A fabric insert in said body of flexible material projects radially outwardly beyond said rim zone of said body of flexible material and forms a clamping zone situated outside said body of flexible material. Such a torque-transmitting element may be associated with annular clamping means that apply clamping pressure only against the portion of the fabric insert situated outside the body of flexible material.

Abstract: A fuse having a composite casing. It includes a radially inner tubular portion that is circular in cross-section, of uniform wall thickness, and houses the fusible element means and a body of pulverulent arc-quenching filler. The casing structure further includes a plurality of angularly displaced rods of an electric insulating material having substantially the same length as the tubular portion of uniform wall thickness of the casing arranged parallel to the axis of said tubular portion, in abutting relation to the outer surface thereof, and adhesively affixed to said outer surface. A pair of spaced external terminal plates closes the tubular portion of the casing and is provided with fasteners having shanks projecting into the end surfaces of said plurality of rods.

Abstract: A vacuum film holder for housing X-ray films and intensifying foils for radiographic purposes comprises two separate superimposed plates for sandwiching therebetween X-ray sensitive films and intensifying foils and an elastomeric sealing body arranged in the gap formed between the plates and surrounding a predetermined area. The sealing body is affixed to one of the plates and engages under pressure the other of said plates in response to evacuation of the cavity formed between the pair of plates.

Abstract: An electric fuse having a casing which has a substantially prismatic outer surface rounded at the longitudinal edges thereof. The casing is a multiply glass cloth laminate including thermosetting resin and is formed by pultrusion.

Abstract: An electric fuse has a casing of synthetic-resin-glass-cloth laminate which includes but three re-inforcement plies, namely an outermost ply of woven glass fiber cloth forming an overlap extending in a direction longitudinally of said casing, and innermost ply formed by spaced rovings of glass fibers extending in a direction longitudinally of said casing, and an intermediate ply formed by a mat of substantially non-uniformly oriented glass fibers, said overlap of said outermost ply and said rovings penetrating into said intermediate ply to such an extent that the outer surface and the inner surface of said casing are substantially smooth substantially cylindrical coaxial surfaces.

Abstract: An electric fuse has a casing of synthetic-resin-glass-cloth laminate which includes a plurality of re-inforcement plies - of woven glass fiber cloth - to the exclusion of any non-woven mat material. There are along the wall of the casing cyclically alternating regions of relatively large and relatively small glass-to-resin content, which allows to impart substantially the same wall thickness to the entire perimeter of the casing.

Abstract: An electric fuse comprises a fusible element, arc-quenching means surrounding said fusible element, a casing of synthetic-resin-glass-cloth laminate housing said fusible element and said arc-quenching means, and a pair of terminal elements arranged at the ends of said casing and conductively interconnected by said fusible element. Said casing includes a plurality of plies, at least an outermost ply and an innermost ply, both formed by woven glass fiber fabric and at least one intermediate ply formed by a glass fiber mat having non-uniformly oriented fibers. The outermost ply and the innermost ply each form an overlap extending substantially in a direction longitudinally of said casing. Both overlaps are angularly displaced. The casing further includes a thermosetting resin integrating said outermost ply, said innermost ply and said intermediate ply into a laminate.

Abstract: A rolling diaphragm not subject to the formation of cusps. The rolling wall of the diaphragm is made up of two regions, one region intended to engage the lateral wall of the piston of the rolling diaphragm device, and another region intended to extend from the lateral wall of the piston of the rolling diaphragm device to the diaphragm clamping region formed by the cylinder body of the rolling diaphragm device. In the first mentioned region the rate of change of diameter along the rolling wall is relatively small, or minimized. The second region is circularly shaped in cross-section. The radius of curvature of the cross-section of that portion is relatively large, so that the rate of change of diameter of the rolling wall in that portion thereof is relatively large.

Abstract: A fuse for elevated circuit voltages, e.g. 4-34 kv, has a tubular insulating casing closed on both ends thereof by means of plug terminals. The latter are provided with blind bores of which each receives one end of a fusible element, a spring means for clamping said end of said fusible element against the lateral wall of said blind bore, and a solder joint conductively interconnecting said end of said fusible element and one of said plug terminals.

Abstract: An electric fuse adapted to form multibreaks at the occurrence of small protracted overload currents includes a first fusible element having a relatively small resistance which supports at a predetermined point thereof means for causing formation of a break at the occurrence of small protracted overloads. The fuse includes a second fusible element having a relatively high resistance shunted across said predetermined point of said first fusible element and has ends adapted to initiate arcing at small current intensities at points thereof located immediately adjacent said first fusible element. Blocks of metal are arranged in spaced relation from said first fusible element in the zone of arcing established by fusion of said ends of said second fusible element to increase the contamination of said zone by products of arcing resulting from vaporization of said blocks.A rod member of electric insulating material is arranged parallel to, but spaced from, the axis of the casing of the fuse.