Abstract: An RFI shielding hood with an integral RFI filter arrangement for a distributor cap, so constructed as to provide strong attenuation in a predetermined broadcast and radio-telephone frequency range.
Type:
Grant
Filed:
April 30, 1993
Date of Patent:
June 15, 1999
Assignees:
Mercedes-Benz Aktiengesellshaft, Doduco GmbH & Co., Dr. Eugen Durrwachter
Inventors:
Klaus Bahm, Roland Michal, Horst Behnke
Abstract: A material for electric contacts based on silver-tin oxide is obtained by mixing a powder of silver or an alloy mainly containing silver with a powder consisting mainly of tin oxide and 0.01 to 10 wt. % (in relation to the quantity of tin oxide) of an additive consisting of one or more compounds containing silver, oxygen and a metal from sub-groups II to VI of the periodic system and/or antimony, bismuth, germanium, indium and gallium, compacting the mixture and sintering it. The tin oxide may be replaced by zinc oxide.
Abstract: Electric low current signals are transmitted through two-wire circuits having coaxial connectors which are closed by windings that are coupled transformer-like to the coaxial connectors. This arrangement allows transmission of control signals for electric power consuming devices within automobile doors, low frequency audio signals, and electrical power to power the electric consumers. All signals are transmitted on a common data cable. Control signals are in binary coded form, modulated onto a carrier signal, as are modulated, low frequency audio signals. The signals are demodulated in a door module and separated according to frequency. The low frequency audio signals are amplified and transmitted to a loudspeaker. The control signals are processed by a microprocessor controller in conjunction with switching units that create corrective actions for the power consuming devices located in the door.
Type:
Grant
Filed:
February 12, 1996
Date of Patent:
October 13, 1998
Assignee:
Doduco GmbH & Co. Dr. Eugen Durrwachter
Inventors:
Norbert Normann, Lothar Schulze, Gunter Uhl, Joachim Ney
Abstract: The invention relates to a material for electric contacts taking silver tin-oxide as basis, consisting of silver or mainly silver-containing alloy, tin oxide and other oxides or carbides of tungsten, molybdenum, vanadium, bismuth, titanium, and/or copper.
Type:
Grant
Filed:
February 21, 1995
Date of Patent:
March 11, 1997
Assignee:
Doduco GmbH & Co. Dr. Eugen Durrwachter
Inventors:
Volker Behrens, Thomas Honig, Andreas Kraus, Karl E. Saeger, Rainer Schmidberger, Theodor Staneff
Abstract: A powder-metallaurgically produced material or extruded semi-finished product for electric contacts of silver or a silver-based metal material with 0.5 to 10 wt. % carbon and 0 to 2 wt. % of an additional metal. The material contains powdered carbon in combination with carbon fibers in the mass ratio of 10:1 to 1:10, whereby the diameter of the powder particles is on average smaller than half the length of the fibers.
Type:
Grant
Filed:
February 14, 1994
Date of Patent:
August 29, 1995
Assignee:
Doduco GmbH & Co. Dr. Eugen Durrwachter
Inventors:
Volker Behrens, Carl L. Meyer, Karl Saeger, Thomas Honig, Roland Michal
Abstract: The apparatus for a continuous selective electrodeposition on a strip comprises a carrier (2), which guides the strip (1) in its longitudinal direction, which are faced by electrolyte discharge orifices (3), through which the electrolyte, which has been discharged by a pump (4) is sprayed onto the strip (1), which is covered by a mask tape (5), The mask tape (5) is provided with at least one row of holes (6) and urges the strip (1) against the carrier (2). The strip (1) is provided with drive means (7) for moving the strip (1) relative to the mask tape (5). The carrier (2) is straight and one or more pressure-applying elements (8), which are parallel to the carrier (2), are associated with the carrier (2) and urge the mask tape (5) against the carrier (2). The carrier and the pressure-applying elements, individually or jointly, define openings (3), which face the electrolyte discharge orifices (3) and overlap the holes (6) of the mask tape (5).
Type:
Grant
Filed:
December 17, 1992
Date of Patent:
February 14, 1995
Assignee:
Doduco GmbH & Co. Dr. Eugen Durrwachter
Inventors:
Horst Herzog, Hans J. Neese, Gerd Schaudt, Wolfgang Mader
Abstract: A semifinished product for electric contact made from a composite material based on silver-tin oxide is described as well as a powder-metallurgical process of making said product. The structure of the semifinished products contains regions which contain no metal oxide or very little metal oxide in alternation with regions which contain the entire metal oxide component or a greatly predominating/share thereof in a fine division.
Type:
Grant
Filed:
September 17, 1990
Date of Patent:
November 1, 1994
Assignee:
Doduco GmbH + Co. Dr. Eugen Durrwachter
Inventors:
Ursula Mayer, Roland Michal, Karl E. Saeger
Abstract: In the method of controlling the wiping interval, the interval of time between two consecutive wiping movements, of which at least the second wiping movement was started arbitrarily, is measured, the measured value is stored and is subsequently used as interval time unless a different interval time becomes stored due to another arbitrary starting of wiping movements, or unless the interval operation of the wiper is interrupted or unless the control circuit is deenergized.
Abstract: The bodies consist of a ceramic slab (1), which is covered on both sides by metal plates (2, 3), which are firmly bonded to the ceramic slab (1) throughout their contact surface without an interlayer and have marginal strips (5) which are reduced in thickness.
Type:
Grant
Filed:
February 24, 1989
Date of Patent:
April 30, 1991
Assignee:
Doduco GmbH and Co. Dr. Eugen Durrwachter