A core barrel comprises an elongate hollow cylinder having a substantially uniform diameter throughout its length and having apparatus at one end thereof for connection to a kelly. The opposite end of the core barrel cylinder is provided with a plurality of circumferentially spaced apart tooth receiving notches each rectangular in shape and characterized by opposed edges spaced apart a predetermined distance. A core barrel tooth is received in each of the notches of the cylinder, and each tooth ...

A core for minimizing the footprint of a core-based components while also minimizing the total harmonic distortion exhibited by the component. The core (40) includes a back wall portion (42), a central wall portion (44), and an outside wall portion (46). The back wall portion has a front (48) and a back (49), with a lower end (51), an upper end (52), and a pair of sides (54,55) extending between the lower and upper ends. The central leg portion protrudes from the front of the back wall portion, ...

A core chuck includes "lock and key" or "key and keyhole" interfaces between the central cam and the mounting plate and the central cam and the end cap. The central cam includes central region having a multi-faceted camming surface adapted to expand and retract a plurality of jaws as is well known. Unlike known core chucks, the first end of the central core has a non-circular perimeter and the mounting plate includes a cavity sized and shaped to substantially correspond to the non-circular perim...

A reactor core includes a plurality of laminations of trapezoidal shape forming the legs of the core. These legs are arranged in generally rectangular configuration with air gaps provided at the corners of the core. These air gaps extend diagonally of the core legs and are formed between the inclined faces of adjacent ends of the trapezoidal-shaped core legs. End plates each having a longitudinal section extending parallel to and fixed to one of the legs and having flanges at each end of the lon...

Collapsible core assembly having retractable portion capable of producing plastic parts having an undercut. The core assembly comprises a segmented portion operably connected to an innercore pulling assembly whereby operation of the innercore pulling assembly first retracts the segmented core and thereafter pulls the complete core assembly out of the molded part.

A core reactor with a reflector formed of graphite and containing a filling f ball-shaped fuel and/or breeder elements, and with an arrangement formed of absorber rods and insertable through the reflector wall into the filling. The graphite of the reflector wall, with the exception of that part of the wall which is penetrated by the absorber rod arrangement after the penetration of the rods into the fill of the fuel and/or breeder elements, or which surrounds the absorber rod arrangement, is dop...

A laminated core for dynamoelectric machines and so on is formed of thin sheet core pieces each blanked into a predetermined configuration and stacked one upon another and are successively welded at a plurality of weld zones of an edge of each core piece by continuous or spot irradiation of laser beams so that the core pieces are combined together. The core piece constituting one of two end faces of the core has first notches formed in one half of the weld zones of the core piece. The core piece...

A core for minimizing the circuit board footprint of a core-based component while also minimizing the total harmonic distortion exhibited by the component. The core includes a back wall portion, a central wall portion, and an outside wall portion. The back wall portion has a front and a back, with a lower end, an upper end, and a pair of sides extending between the lower and upper ends. The central leg portion protrudes from the front of the back wall portion, and the central leg portion is subs...

A reactor core for a boiling water nuclear reactor includes a plurality of fuel assemblies (40) with a plurality of vertical fuel rods (10) and possibly occasional vertical water-filled rods or channels (32, 48, 49, 50, 51) which are surrounded by a fuel channel (1). Between the fuel assemblies (40) there are arranged water gaps (37a, 37b). At least one fuel assembly (40) has at least one outer, reduced corner portion (41) facing a gap (37a, 37bb), and the number of fuel rods (10) in each such f...

A core sampler, particularly for use in oil prospecting, including a flexible movable ring (5), provided in particular at the front end (2) of the core sampler, which end is connected to a coring bit (3), for grasping a core sample (C) to be brought to the surface. The ring has a cylindrical internal surface (6) to be clamped around the core sample (C), and a frustoconical external surface (7) tapering towards the front end (2). In the end or starting position, the ring (5) is exposed to zero or...