Patents Assigned to Karl Fischer
  • Patent number: 4414466
    Abstract: An electric hotplate with a cast member has a downwardly-directed border on its outer periphery. The edge of a covering sheet centrally fixed to the hotplate by a hollow screw rests on the lower edge of the border. A covering sheet step is centered within the border. A moisture-proof closure is obtained through an interposed seal and insulation is provided by a crinkled aluminum foil. The hot plate connecting leads are passed via an insulating member through the covering sheet which, peripherally displaced by 180.degree., faces a depression in the covering sheet so that hot plates according to the invention can be stacked in a space-saving manner. The connecting leads are flexible and their ends are brought together in a common connecting member.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: November 8, 1983
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Felix Schreder
  • Patent number: 4410793
    Abstract: An electric hotplate (11) has a metal plate-like or inverted dish-shaped circular hotplate member (12) against whose bottom are pressed by spring elements (25) thin flexible tubular heaters (31), while interposing a multilayer insulation (28). A support disk (26) is placed between insulation (28) and spring elements (25). According to a variant a reinforcement is provided, which may also be placed between the insulation and the tubular heaters. The electric hotplate has a low heat storing capacity and a very flat upper cooking surface (32), even under operating conditions.
    Type: Grant
    Filed: September 2, 1981
    Date of Patent: October 18, 1983
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Hermann Knauss, Felix Schreder
  • Patent number: 4386263
    Abstract: An electric hot plate has an overheating safety switch having a steatite housing which is inserted into the lower sheet cover plate of the hot plate and is supported with two feet on the lower side of the heating elements of the hot plate. A bimetallic member is positioned parallel between these feet which acts on a snap switch positioned in the steatite housing via a transmission rod. The transmission rod is continuously pressed against the snap switch by a plate spring and a guide on the snap switch. As a result of this, it is fixed precisely in its position. The overheating safety switch simultaneously forms the lead-through passages for the electric hot plate connections.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: May 31, 1983
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Felix Schreder
  • Patent number: 4348581
    Abstract: An electric hot plate with a cast member has a downwardly-directed border on its outer periphery. The edge of a covering sheet centrally fixed to the hot plate by a hollow screw rests on the lower edge of the border. A covering sheet step is centered within the border. A moisture-proof closure is obtained through an interposed seal and insulation is provided by a crinkled aluminum foil. The hot plate connecting leads are passed via an insulating member through the covering sheet which, peripherally displaced by 180.degree., faces a depression in the covering sheet so that hot plates according to the invention can be stacked in a space-saving manner. The connecting leads are flexible and their ends are brought together in a common connecting member.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: September 7, 1982
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Felix Schreder
  • Patent number: 4330701
    Abstract: A mounting arrangement is provided for mounting a sensing box in an opening in an electric hot plate on which a cooking vessel is to stand. The sensing box is connected via a capillary tube to a controller and is pressed toward the cooking vessel by the force of a spring. The mounting arrangement comprises a holding member having a plurality of arms relative to which the sensing box is axially movable to a limited extent and which supports the pressing spring and holds resilient catch elements for securing the holding member on the hot plate. A spreader member limits the inward pressing of the sensing box into the opening by resting on the sensing box in its outer peripheral region.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: May 18, 1982
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Robert Kicherer, Hans Mayer
  • Patent number: 4318676
    Abstract: A device for spinning endless filaments out of synthetic polymers is disclosed. The device comprises a plurality of spin positions with each spin position having a spin head with four spinneret holders each fed by a multiple spin pump of a blowing chamber, a spin finish device and a winding device with at least two winding axes. The device is characterized in that one spinneret is in each spinneret holder and the spinneret can be fed by a spin pump with at least dosed melt streams, the quantity of which is designed for spinning four, eight or twelve ends per spin position which are adapted to be wound up thereafter.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: March 9, 1982
    Assignee: Karl Fischer Industrieanlagen GmbH
    Inventors: Luder Gerking, Gunter Panke
  • Patent number: 4202855
    Abstract: A method for producing a multifilament yarn by melt spinning of individual filaments which are grouped together to form yarn, in which, before winding, the yarn is subjected, in addition to the actual removal forces acting from the outside on the yarn, to further forces produced by gas streams which accompany the yarn in its longitudinal direction.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: May 13, 1980
    Assignee: Karl Fischer, Apparate-und Rohrleitungsbau
    Inventors: Luder Gerking, Dirk Stahlmann, Horst Rothert, Wolf Karasiak
  • Patent number: 4153833
    Abstract: An electric hot plate assembly including an electrically heated hot plate having at least one electrical conductor disposed therewithin for heating an annular zone of the plate when energized, cover means defining an enclosed space located immediately beneath said hot plate and secured thereto, and a device for limiting the operating temperature of the hot plate, the temperature limiting device comprising a housing, a bimetallic element projecting from said housing into said enclosed space at a location beneath said annular zone, the housing having a base portion disposed externally of said enclosed space, connecting terminals located in the base portion of the housing for connecting said at least one hot plate conductor to an electrical supply, and switch means located in said base portion of the housing and adapted to be actuated by the bimetallic element by a pressure rod means, said bimetallic element being curved, the first end of said bimetallic element being in pressure engagement with said pressure ro
    Type: Grant
    Filed: August 3, 1978
    Date of Patent: May 8, 1979
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Klaus Barth
  • Patent number: 4122330
    Abstract: An electric hot plate assembly including an electrically heated hot plate having one or more electrical conductors disposed therewithin for heating an annular zone of the plate when energized and a device for limiting the operating temperature of the hot plate. A bimetallic element is disposed in a first portion of a housing of the temperature limiting device which projects into an enclosed space located immediately beneath the annular zone of the hot plate. The enclosed space is closed by a cover. A switch, which is adapted to be actuated by the bimetallic element, is located on a base portion of the housing disposed externally of the enclosed space, the first portion and base portion of the housing being thermally insulated from each other. The base portion of the housing carries connecting terminals for connecting the hot plate conductor or conductors to an electrical supply.
    Type: Grant
    Filed: May 5, 1977
    Date of Patent: October 24, 1978
    Assignee: Karl Fischer
    Inventors: Karl Fischer, Felix Schreder
  • Patent number: 3987021
    Abstract: A process for polymerization or polycondensation wherein the reactor is equipped with a stirrer disposed in the interior of the reactor to be rotatable about an axis extending in the direction of the longitudinal axis of the interior of the reactor, the reactor also including inlet and discharge conduits for the reaction mass, a conduit for the removal of gaseous substances produced by evaporation during the reaction, and a heating device, and the reactor being mounted so that its longitudinal axis is inclined to the vertical so that the interior of the reactor defines a lower chamber which is to be filled with a liquid reaction mass and an upper chamber to be filled with vapors formed during the reaction, with the reaction mass discharge conduit being disposed at the lowest point of the fluid chamber and the stirrer being constructed so that its outermost parts which extend into the vapor chamber dip into the fluid chamber during each revolution of the stirrer.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: October 19, 1976
    Assignee: Karl Fischer Apparate u. Rohrleitungsbau
    Inventor: Horst Rothert