Abstract: A thumbpiece or thumb support (400) positioned between a head assembly (300) and a handle assembly (200) of a power operated rotary knife (100). The thumb support (400) includes a thumb supporting surface (454) to support a thumb of an operator's hand during operation of the power operated rotary knife (100). The thumb support (400) comprises a base portion (410) and thumb supporting portion (450) including the thumb supporting surface (454). The thumb support (400) further includes an interface assembly (480) between the thumb supporting portion (450) and the base portion (410) for relative pivotal movement between the thumb supporting portion (450) and the base portion (410).

Abstract: A thumbpiece or thumb support (400) positioned between a head assembly (300) and a handle assembly (200) of a power operated rotary knife (100). The thumb support (400) includes a thumb supporting surface (454) to support a thumb of an operator's hand during operation of the power operated rotary knife (100). The thumb support (400) comprises a base portion (410) and thumb supporting portion (450) including the thumb supporting surface (454). The thumb support (400) further includes an interface assembly (480) between the thumb supporting portion (450) and the base portion (410) for relative pivotal movement between the thumb supporting portion (450) and the base portion (410).

Abstract: In accordance with the present invention, a recloser assembly including three modular recloser units operating under the control of a controller. The recloser units are interchangeable and are suitable for use in a three phase power distribution system where three phase tripping is desired or each recloser unit may be operated independently as in a single phase power distribution system. For use in a three phase system, a gang rod mechanically couples pivoting actuation levers extending from a solenoid switching assembly of each of the recloser units. The gang rod insures that all three switching assemblies open and close in unison, thus, each power is transmitted by all three recloser units or power is not transmitted by any of the three recloser units. For single phase power distribution operation, the gang rod is removed and the recloser units operate independently. Each recloser unit includes a cube shaped base, a tapered cylindrical support affixed to an upper surface of the base.

Abstract: A switchgear module is provided that is assembled from one or more molded housing portions to provide a gas-tight volume for the housing of electrical components. The switchgear modules include provisions for assembly of various combinations of switchgear modules into a variety of electrical circuit configurations while maintaining a gas seal of the switchgear modules. In a preferred arrangement, the switchgear module includes bus conductors that are integrally incorporated during the molding of the switchgear module housing and that are accessible from opposite sides of the module. Further, the switchgear module includes integrally molded features for providing access to make electrical interconnections between the bus conductors of adjacently positioned switchgear modules.

Abstract: A loadbreak switch is provided that utilizes a pivotally mounted movable jaw contact and a main stationary contact that is positioned in the middle of an arc runner. For operation at voltages 15 kV and above, the switch utilizes a shunt contact that bridges the arc runner and that is above and coplanar with the main stationary contact. A magnetic field is developed by the current that flows through a coil of wire disposed around the arc runner. This configuration when utilized in an environment of insulating gas, provides efficient extinguishing of arcs upon opening of the contacts. Further, the open jaw contact is easily visible to establish an open gap.

Abstract: A vent arrangement for enclosures that prevents the penetration of a pry bar. The vent arrangement includes a first predetermined pattern of openings of predetermined shape and dimensions provided at the exterior wall of the enclosure. The dimensions of the openings and the spacing between the openings are determined relative to the pry bar and the material in which openings are formed, such that the pry bar cannot fully enter the openings and such that the portion of the pry bar that can be applied to the openings does not cause any substantial deformation of the material surrounding the openings that could permit widening of the openings so as to allow full entry of the tip of the pry bar. In a preferred embodiment, to permit the maximum percentage area of openings within the pattern of openings while achieving the desired tamper-resistant characteristics, the first predetermined pattern of openings includes staggered rows of openings such that the openings of adjacent rows are not aligned.

Abstract: A vent arrangement is provided for enclosures that prevents the entry of water into the enclosure and that also prevents the penetration of a pry bar or probe wire. The vent arrangement includes a first predetermined pattern of openings of predetermined shape and dimensions provided at the exterior wall of the enclosure. The dimensions of the openings and the spacing between the openings are determined relative to the pry bar and the material in which openings are formed, such that the pry bar cannot fully enter the openings and such that the portion of the pry bar that can be applied to the openings does not cause any substantial deformation of the material surrounding the openings that could permit widening of the openings so as to allow full entry of the tip of the pry bar.