Abstract: An improved load break disconnecting device is disclosed, comprising a conductive portion having a non-gassing fuse, a fuse cartridge having first and second ends and enclosing said fuse, a conducting hinge assembly and conducting stationary contact means, and a non-conducting arc extinguishing sleeve with latch means for latching the sleeve in a non-covering position until the switch is closed and biasing means for snapping the sleeve into an arc-extinguishing, covering position when the switch is opened.

Abstract: A current-limiting dropout fuseholder includes multiple current paths through the fuse body. A primary current path includes a high current fusible element. A secondary current path in parallel with the primary path includes a triggering conductor that extends outside the fuse body and is connected to a moveable support. The second current path further includes a first spark gap for severing the triggering conductor upon the occurrence of a fault and the shifting of the fault current from the primary current path to the second current path. A second spark gap formed between the primary and the second current paths ensures that the fault current flows across the first spark gap for a time sufficient to sever the triggering conductor, thereby ensuring that dropout will occur.

Abstract: A current responsive latching apparatus may be employed in a dropout fuseholder or other electrical component for retaining the component in a current-carrying position and disconnecting and isolating the electrical component upon the occurrence of an overcurrent of a predetermined magnitude. The apparatus includes a current path through the component, including a current-carrying stud or conductor, a portion of which extends outside the component for releasably engaging a support member. A latching apparatus, which may include an actuating member of memory allow or a bimetallic material, engages the conductor to retain the support member in a supporting position beneath the electrical component. The apparatus may further include a heater element in the current path to ensure that the actuation member is heated to the temperature necessary to cause it to change shape and release the conductor upon the presence of an overcurrent.

Abstract: The fuseholder includes a current limiting fuse mounted within a fuse body and a lower contact and hinge assembly. The fuse body has contact assemblies mounted on each end thereof. The lower contact assembly on the fuse body is mounted on a hinge which is rotatably supported on an interchangeable cutout mounting. The current limiting fuse includes a fuse element spirally wound around a spider which extends the length of the fuse body. The fuse element includes a high current fusible element and a low current fuse element. The fusible element includes a plurality of spaced reduced areas and is supported on the spider by support surfaces which are located between adjacent reduced areas of the fusible element. An auxiliary wire also extends the length of the fuse body about the spider.

Abstract: A fuse is provided for protection of high current power distribution equipment, such as transformers. The fuse includes a dual function fuse element having a solder pot which permits fuse opening in response to long-term current overload conditions, and a minimum cross-section wire portion for short circuit opening. The fuse element is enclosed within a tube, and the tube is received within a housing. The tube is closed off on one end thereof with a dual size button, which size is selectable for reception into the housing.

Abstract: The fuseholder includes a current limiting fuse mounted within a fuse body and a lower contact and hinge assembly. The fuse body has contact assemblies mounted on each end thereof. The lower contact assembly on the fuse body is mounted on a hinge which is rotatably supported on an interchangeable cutout mounting. The current limiting fuse includes a fuse element spirally wound around a spider which extends the length of the fuse body. The fuse element includes a high current fusible element and a low current fuse element. The fusible element includes a plurality of spaced reduced areas and is supported on the spider by support surfaces which are located between adjacent reduced areas of the fusible element. An auxiliary wire also extends the length of the fuse body about the spider.

Abstract: A mounting bracket assembly for mounting an object to a support structure includes a hanger strap for gripping the object and a channel member for supporting the hanger strap. The hanger strap includes a lobe disposed about the object and inwardly projecting mounting tabs which engage aligned slots formed in the sides of the channel member. A single fastener is disposed through the hanger strap adjacent to the tabs so as to cause the lobe to simultaneously grip the arrester and to retain the mounting tabs in the slots.

Abstract: A spider for a gassing current limiting fuse made of an asbestos free material is disclosed. The spider material produces an arc quenching gas and water upon erosion by an arc. The material includes the following proportions of ingredients: 50-80% Al.sub.2 O.sub.3.3H.sub.2 O; 8-22% Wollastonite (CaSiO.sub.3); and 10-25% melamine formaldehyde resin.

Abstract: A fail-safe, non-fragmenting surge arrester includes a liner having outlets formed in the walls thereof for venting ionized gases generated within the liner by internal arcing. The vented ionized gas forms a lower impedance path for the current which is thereby shunted around the failed internal components, preventing the generation of internal pressure which could otherwise cause a fragmenting failure mode of the arrester. The internal components include stacked varistor elements and may include an internal fuse link electrically in series with the varistors.

Abstract: A web of heat-sealable material is advanced in overlying relation with a row of filled cups to a sealing station where both the web and a cup dwell momentarily. During the dwell period, a head at the sealing station advances downwardly and successively tamps a disc-like portion of the web downwardly into the upper end portion of the cup, seals the outer periphery of the disc-like portion to and around the upper lip of the cup and then severs the disc-like portion from the web so as to leave the cup sealed with a flexible membrane.