Patents by Inventor Siegbert Berger

Siegbert Berger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5434388
    Abstract: A flow heater (11) has a stainless steel tube (1Z), around which is externally placed a polyimide (KAPTON) insulating film (14) with an overlap (15). Under pretension is wound onto the same a metallic resistance material heating tape (17), so that the resulting elasticity reserve, also at operating temperature, ensures a good application of the heating tape to the film. Temperature switching devices for preventing excess temperatures or running dry can be fitted in the overlap area (15).
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: July 18, 1995
    Assignee: E.G.O. Elektro-Gerate Blanc u. Fischer
    Inventors: Willi Kralik, Siegbert Berger, Franz Bogdanski, Peter Stupp, Werner Koegel
  • Patent number: 5309133
    Abstract: In the manner of a tubular heater, a temperature sensor comprises a metallic tubular jacket with internal resistance wire coil embedded in insulating material and closing pieces having electrical connection members, so that a very simple, robust and high temperature-resistant temperature sensor with a measuring range up to e.g. approximately 750.degree. C. is obtained. The temperature sensor jacket can be earthed or grounded. For operating the temperature sensor there is appropriately a test current in the mA range in the case of a test voltage in the mV range, whose temperature-dependent changes are processed by means of an electronic amplifier.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: May 3, 1994
    Assignee: E.G.O. Elektro-Gerate Blanc u. Fischer
    Inventors: Siegbert Berger, Volker Brennenstuhl, Gerhard Goessler, Hans Mohr, Wilfried Schilling, Juergen Schwackenhofer, Eugen Wilde
  • Patent number: 4978815
    Abstract: A load selector for switching over from one tap of a step transformer to the next includes fixed step contacts disposed on a circle and connected to taps of a step transformer. At least two switch contacts per phase are disposed in common on a pivotable contact carrier and are simultaneously pivotable on the circle. Two vacuum switches per phase are electrically built into the contact carrier and connected in series with the switch contacts. A cam race is disposed along the circle. Rollers run along the cam race for actuating the vacuum switches. The cam race and the rollers are current free. A slip ring is coaxial with the cam race and the circle. The cam race is disposed axially between and spaced apart from the fixed step contacts and the slip ring. Slip contacts slide on the slip ring. Each of the vacuum switches are eletrically connected between a respective one of the switch contacts and a respective one of the slip contacts.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: December 18, 1990
    Assignee: Maschinenfabrik Reinhausen GmbH
    Inventors: Siegbert Berger, Karl Kurz, Alfred Mayer