Patents by Inventor Helmut Waigand

Helmut Waigand 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: 5343020
    Abstract: A stove with pyrolytic self-cleaning includes an oven having an oven space, at least one wall region, a heating element disposed in the at least one wall region, a forced-air blower for venting the oven, a device for pyrolytic self-cleaning, and an optional forced-air heating device. A sensor system is disposed in the oven space for detecting operationally dictated oven soiling values and issuing input values. An evaluation circuit has an input connected to the sensor system for frequency-converting the input values, for digitizing the input values, for counting the input values, for storing the input values, and for concatenating the input values. The evaluation circuit has an output side signaling a degree of soiling and the evaluation circuit recommends and/or carries out an initiation of pyrolysis.
    Type: Grant
    Filed: August 19, 1992
    Date of Patent: August 30, 1994
    Assignee: Bosch-Siemens Hausgeraete GmbH
    Inventors: Helmut Waigand, Gottfried Wallner
  • Patent number: 4849597
    Abstract: A device for controlling electrical consuming devices in ovens includes a function control device which can be adjusted for the control of function cycles, an evaluation circuit, a manually operated function selector switch for adjusting the function control device through a binary code connection, special manually operated input elements directly assigned to the function control device also operating for adjusting the function control device, the evaluation circuit being disposed in the function selector device for receiving the binary signals provided by the function selector switch which, upon the change of at least one of the binary codes, causes a resetting criterion for the function commands entered through the input elements.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: July 18, 1989
    Assignee: Bosch-Siemens Hausgerate GmbH
    Inventor: Helmut Waigand
  • Patent number: 4493979
    Abstract: A control circuit assembly, includes a cooking plate having at least two individual cooking regions being electrically connectible in common for cooking together, heating elements being disposed in the cooking regions of the cooking plate and having inputs, current circuits connected to the heating elements, an electronic control device connected to the inputs of the heating elements for producing variable heating power outputs, heating power control devices respectively associated with the heating elements, and switching elements disposed in the current circuits for selectively connecting each of the respective heating elements in the individual cooking regions to one of the heating power control devices in a first switching mode, and for connecting the heating elements of the individual cooking regions together to one of the heating power control devices while disconnecting the other heating power control devices from the respective heating elements with which they are associated in a second switching mode.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: January 15, 1985
    Assignee: Bosch-Siemens Hausgeraete GmbH
    Inventors: Walter Bredel, Norbert Schenetin, Helmut Waigand
  • Patent number: 4430578
    Abstract: Multistage switching device for the input of adjustment values in electronic switching systems, including a counter circuit having counting stage inputs for counting orders of magnitude and oppositely counting directional inputs, an input switching part being movable into a plurality of adjustment positions, a plurality of contact points each being disposed at one of the adjustment positions and being connected to one of the counting stage inputs, and a changeover contact device of the input switching part being connected to the oppositely counting directional inputs.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: February 7, 1984
    Assignee: Bosch-Siemens Hausgerate GmbH
    Inventor: Helmut Waigand
  • Patent number: 4419653
    Abstract: Variable resistance switch of a continuously-variable resistance pressure-dependent measurement sensor for triggering a switching operation of an electrical evaluating circuit through a compressive loading, including an elastic layer being formed of elastomeric material interspersed with electrically conductive particles and being deformable with increasing application of force, and a conductive surface disposed opposite the elastic layer.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: December 6, 1983
    Assignee: Bosch-Siemens Hausgerate GmbH
    Inventor: Helmut Waigand