A magnetic reading device having two electrically series-arranged magnetoresistive elements, in particular for interference compensation and positioning control. A pattern of equipotential strips is provided on each element to adjust the quiescent angle .alpha. between the direction of magnetisation and the direction of current passage of one element between 30.degree. and 60.degree. and between 210.degree. and 240.degree., respectively, and that of the other element at 360.degree. - .alpha. and...

An erase head comprises a magnetizable material which can be magnetized into a permanent magnet having N- and S-poles. The magnetization takes place in a manner such that one of the poles which is the first to be contacted by a magnetic medium to be erased is magnetized to produce a field strength which is less than the magnetic field strength produced by the other pole.

This disclosure relates to a novel tracer head comprising a stylus, stylus support and housing, and two perpendicular differential transformers. The stylus has a unique configuration enabling more precise memory of its null position when the stylus is not deflected. Further, the stylus has a rotating top pin for contacting the pattern or template that assures a condition assumed in tracer control systems but not achieved under all conditions, i.e., the stylus will deflect away from the template ...

A stapling apparatus in which a staple is supported laterally as it is being driven into an article to prevent tilting thereof. The staple lateral support is retractable to facilitate removal of a jammed staple.

A thin-film thermal head comprises a thin-film heat-generating resistor made of an alloy of Si and a high melting point metal such as Ta, Mo, Ti, W or Zr. Joule heat generated by supplying a pulse current to the thin-film heat-generating resistor is utilized to develop a color on a heat-sensitive recording paper for printing characters and pictures. Resistance against thermal shock of the thin-film heat-generating resistor is improved, thereby attaining a stable lifetime of the thermal head.

There is disclosed a print head having a print head frame, a plurality of drive wheels, a support, and a plurality of printing bands trained about the support and the respective wheels so that the selected printing elements can be presented at a printing zone. Each printing band has a plurality of different printing elements connected by hinges. The support has a pair of support members having respective elongated lands, and the lands have tapered entries and terminate at opposed generally paral...

The invention contemplates an improved work-contacting probe for use in a measuring machine wherein the relationship between contacted locations on a workpiece are reduced to coordinate digital data. The various described probe embodiments feature means whereby positional errors due to probe flexure upon work contact are substantially reduced, as compared to pre-existing structures.

A magnetic head for tape recorders and the like is manufactured with cores made of alloys of elements such as Al and Fe which have relatively large potential differences. In order to avoid the galvanic effect which may be produced by segregation and impurities in the alloys, a part of the tape sliding surface is made of an element such as Zn which is lower in galvanic potential than elements forming the cores, and that part of the tape sliding surface is made electrically conductive to the cores...

A cutter head the entire cutting width of which is divided into a few parallel cutting strips defined by respective sets of cutting knives. The diameters of the cutting circles of the knives of the different sets increase stepwise in the direction away from the log. The angle of inclinaton of the main cutting edge of the knives in relation to the axis rotation of the cutter head is large in the case of the knives defining the cutting strips placed closest to the log and small in the case of the ...

A stem has an upper central bore terminating a short distance from the lower end, with transverse holes for connecting the bore with the outside of the stem. Below these holes is a spiral rib, such as an Acme thread, with the lower end of the stem being beveled. A housing having interfitting threads with the stem and adjustable along the stem has a central bore terminating in a conical surface corresponding to the bevel of the stem, from which a hole extends to the lower end of the housing. A re...