There is disclosed an improved thermal printer with a rigid frame made from a main frame plate with compound bends and a base plate, record member supply roll mounting and guide devices, an ink ribbon and record member web feed control system, a print head assembly, and improved ink ribbon cores and spindles.

An isolation transformer core having a coil and a core member made by injection molding a mixture containing 10 to 50.+-.3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

A core for an inductance coil adapted to provide a variable inductance for inductance correction or the like. The core utilizes centrally located sleeve comprised of non-magnetizable, polymeric material threaded to receive a matingly threaded cylindrical core adjusting member.

The present invention prevents poor contact of a core and an inductor with a substrate as well as improves the strength of attachment of such core and inductor to the substrate. A core mounted on a substrate is having one or more electrode forming parts. The electrode forming parts comprise: a convex part having a peak surface that is projecting from an end surface of the core, the most projecting portion and is shaped flat and a step part formed from the outer rim of the peak surface to the end...

A core catcher for a core sampler has a hollow, semi-ellipsoidal body adapted to be fitted into a sample tube and being open at one end to permit material to be sampled to pass into the tube through the body. The body is slit axially from its other end to form a plurality of resilient, flexible, longitudinally and transversely arched fingers which may be flexed outwardly or away from one another as material to be sampled passes through the body. The fingers have convex, free ends which terminate...

In a three-phase and three-leg core structure of a core-type transformer comprising three main legs of a substantially circular cross-sectional shape and a yoke of a non-circular cross-sectional shape for magnetically connecting the three main legs, each of the three main legs having a cross-sectional area substantially equal to the cross-sectional area of the yoke, wherein at least joints between the steel plate laminations of a center main leg and the adjoining steel plate laminations of the y...

A highly bendable antenna core (8) which is highly bendable for high-frequency identification systems substantially retains its soft-magnetic properties when bending occurs. The antenna core is produced by using specific amorphous or nanocrystalline alloys having a very low magnetostriction value. The antenna core (8) is embodied in the form of a laminate with/or without insulating layers placed therebetween. An antenna can be provided with one such antenna core.

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 ...

In a core bit formed with a drill portion in a cylindrical shape formed with a boring blade on one end side thereof and a mounting portion in a cylindrical shape mounted to a chuck portion of a concrete drill on other end side of the drill portion, formed with an engaging portion capable of being engaged with an engaging portion on a side of the chuck portion at an outer peripheral face of the mounting portion for transmitting rotation of a side of the concrete drill via the engaging member, the...

A core chuck comprising radially movable exterior jaw members, means operative in response to a relative rotation between the jaw members and those means to apply a radially outward force to the jaw members, and biasing means for urging the jaw members toward a predetermined radial position. The biasing means comprise a band spring disposed in axially aligned recesses in surfaces of the jaw members, at least one of the recesses being provided with spring retainer means preventing removal of the ...