Vacuumschmelze Gmbh & Company Kg

Vacuumschmelze Gmbh

Hartwin Weber

Ottmar Roth

Gernot Hausch

Waldemar Doering

Kurt Emmerich

Jens Diehl

Waldemar Döring

Hermann Wegerle

Lutz Hinrich

Matthias Schierling

Disclosed are markers for a magnetic theft protection system, which markers contain at least one oblong alarm strip made of an amorphous ferromagnetic alloy and at least one activation strip made of a molybdenum-free semi-hard magnetic alloy consisting essentially of NiMFe, wherein M is one or more of the elements from the group including Cr, W and V, and wherein a and b are weight percentages such that 15% by weight&#x2266;a&#x2266;25% by weight, and 2% by weight&#x2266;b&#x2266;8% by weight. The activation strip has a coercive force Hof 10 A/cm to 25 A/cm and a remanence Bof at least 0.9 T.

Marker for a magnetic theft protection system and method for its production

A seamless, rotationally symmetrical hollow blank formed by a non-cutting operation from a deformable permanently magnetic alloy is provided, said alloy consisting essentially of 5.0 to 20.0 percent by weight cobalt, 20.0 to 35.0 percent by weight chromium, for the remainder iron and impurities caused by melting and/or by chance. The seamless hollow body is suitable in particular for use in hysteresis clutches, hysteresis brakes, and position measuring devices. Furthermore, non-cutting shaping processes for producing the seamless rotationally symmetrical hollow body are provided, with roller spinning being preferred.

Rotationally symmetrical hollow body made of a deformable permanently magnetic alloy and its use and production process

A material for electrical contacts comprising a martensitic cobalt-nickel-iron alloy with a high strength, a high bendability and a high electrical conductivity, with a cobalt content of 12.0&#x2266;Co&#x2266;60.0% by weight, a nickel content of 10.0&#x2266;Ni&#x2266;36.0% by weight, remainder iron and an impurity content of less than 0.2 atomic percent, with a martensite temperature Ms of 75&#xb0; C.&#x2266;Ms&#x2266;400&#xb0; C. in the case of the martensitic variant and &#x2212;50&#xb0; C.&#x2266;Ms&#x2266;25&#xb0; C. in the case of the variant which is naturally hard as a result of cold-forming.

Electrical contact material comprising a cobalt-nickel-iron alloy

Disclosed are a marker for a magnetic theft protection system, comprising:

An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially increases in a linear manner within a temperature range between an ambient temperature and 1500 DEG C. and can be used for a temperature control. The PCT resistance is provided with an oxidation resistant metallization or is gas-tightly enveloped by a jacket (), a space between the jacket () and the PCT resistance () being filled with a powder or granules () which remove an important gas amount from the space.

Electrical heating element

A semi-hard magnetic alloy for activation strips in magnetic anti-theft security systems is disclosed that contains 8 to 25 weight % Ni, 1.0 to 4.5 weight % Al, 0.5 to 3 weight % Ti and the balance iron.

Marker for use in a magnetic anti-theft security system

The invention relates to a high-strength, age-hardenable, corrosion-resistant maraging type spring steel, which is essentially comprised of 6.0 to 9.0 wt. % of Ni, 11.0 to 15.0 wt. % of Cr, 0.1 to 0.3 wt. % of Ti, 0.2 to 0.3 wt. % of Be and of a remainder consisting of Fe, whose martensite temperature M &gE;130&deg; C. and which has a ferrite content c of less than 3%.

Maraging type spring steel

Display Element for Employment in a Magnetic Anti-theft Security System A semi-hard magnetic alloy for activation strips in magnetic anti-theft security systems is disclosed that contains 8 to 25 weight % Ni, 1.5 to 4.5 weight % Al, 0.5 to 3 weight % Ti and balance iron. The alloy is distinguished over known, employed alloys by excellent magnetic properties and a high resistance to corrosion. Further, the inventive alloy can be excellently cold-worked before the annealing.

Display element for employment in a magnetic anti-theft security system

Marker for use in a magnetic anti-theft security system and method for marking the marker

An iron-based, cobalt-containing soft magnetic alloy suitable for use as a core in a magnetic switch or other exciting circuits has a cobalt content of 6 through 30 weight percent, at least one of the elements chromium, molybdenum, vanadium and tungsten in range of 3 through 8 weight percent, and a remainder iron, possibly including inconsequential contaminants. The alloy has a coercive field strength of lower than or equal to 3.2 A/cm, and a saturation flux density of greater than 1.9 Tesla.

Iron-based soft magnetic alloy containing cobalt for use as a solenoid

An apparatus for screening a magnetic field including a number of panels having a panel core of carrier material and at least one screening layer of soft magnetic material adhered to the panel core, where adjacent panels are secured in rigid, load-bearing relation to one another.

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Hanau, Germany

Hartwin Weber