Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5050185 | Process and apparatus for measuring the instability of an arc in an electrical arc furnace for processing liquid metal According to this process and this device: a signal representing the derivative of the intensity of the current in the arc is sensed, the sensed signal is amplified, the amplified signal is directed simultaneously into two band pass filters (6, 7) respectively... | 09/17/1991 |
| 4903278 | Electrode holding and positioning A consumable electrode is positioned in a furnace under utilization of radially outwardly projecting ribs, at least one wheel with projection engages one of the longitudinal ribs and provides a deformation thereof in terms of indentation and thereby is an... | 02/20/1990 |
| 4797897 | Apparatus for controlling the distance of a melting electrode from the surface of the melted material in a vacuum arc furnace Apparatus for controlling the distance of a melting electrode from the surface of melted material in a vacuum arc furnace which uses short circuits caused by the droplets between the melting electrode and the surface of the melted material as a control cr... | 01/10/1989 |
| 4742528 | Compensation for power feed line weight in weight measurement devices A compensation device for the influence of the weight of a power feed line on a weight measurement device determining the weight of an electrode and/or the melting rate in an electro-slag remelting process, in a vacuum arc furnace or the like. When an x-y... | 05/03/1988 |
| 4701932 | Method for regulating the electrodes in a furnace having freely burning electric arcs A method for the optimum regulation of the electrodes of a three-phase electric arc furnace wherein each electrode has an associated arc voltage regulator which receives the associated arc voltage as its actual value and a desired arc voltage value as its... | 10/20/1987 |
| 4683577 | Method and apparatus for regulating arc discharge furnace A method and apparatus for regulating an arc discharge furnace having a lining, a plurality of electrodes disposed above a bath of conductive material, an adjustable transformer for applying to each electrode a voltage which causes an arc current proporti... | 07/28/1987 |
| 4677643 | Device for feeding one or a plurality of electrodes in an electrothermal furnace Operation control system for an electrothermal furnace having one or more electrode and a transformer unit for each electrode for supplying heating current to its associated electrode. The or each transformer unit includes a main transformer having a prim... | 06/30/1987 |
| 4646318 | Crucible furnace with adjustable electrodes A crucible furnace including a furnace vessel in which a graphite electrode and a metal contact electrode are vertically and horizontally movable.... | 02/24/1987 |
| 4620308 | Arc furnace electrode control An arc furnace electrode control includes phase angle measuring devices connected respectively for producing a phase angle signal functionally related to the phase angle between the primary electrode voltage and current. A bias circuit is coupled to the p... | 10/28/1986 |
| 4607373 | Control system for a DC arc furnace A control system for a DC arc furnace having a hearth adapted to contain a scrap or metal charge, an arcing electrode, a thyristor converter having a connection with the electrode and charge to form a circuit, current comparing comparator for comparing cu... | 08/19/1986 |
| 4586187 | Control apparatus for controlling movements of an electrode in an electric arc furnace The electrode of an electric arc melting furnace is adjusted in height by a hydraulic cylinder having an operating chamber which is connected via a servo valve to a hydraulic pressure source or, respectively, to a reservoir. The servo valve is actuated by... | 04/29/1986 |
| 4578795 | Drop short control of electrode gap During vacuum consumable arc remelting the electrode gap between a consumable electrode and a pool of molten metal is difficult to control. The present invention monitors drop shorts by detecting a decrease in the voltage between the consumable electrode ... | 03/25/1986 |
| 4549301 | Direct-current electric-arc furnace and method of operating same An electric arc furnace comprising at least one pair of electrodes extending through the roof of the furnace for the creation of electric arcs between each of the electrodes and the charge to be melted, and a source for applying direct current to each of ... | 10/22/1985 |
| 4530102 | Lancing in electric arc steelmaking A method of controlling the depth of immersion of an oxygen lance in a molten bath within an electric arc furnace where noise emitted from the furnace during lancing in an acoustic spectrum ranging between 1 kHz and 15 kHz defined by a plurality of select... | 07/16/1985 |
| 4435631 | Method and device for controlling the length of an electrical arc in an arc generating machine In accordance with the method, the arc supplying current is modulated if necessary for generating an acoustical signal. The acoustical signal generated by the arc is detected and its amplitude which, in practice, is a direct function of the actual length ... | 03/06/1984 |
| 4422173 | Electrode column snubber for electric arc furnace electrodes A snubber device for preventing the uncontrolled fall of a column supporting an electrode and crosshead structure in an electric arc furnace upon failure of the hoisting mechanism or cable. Clamp plates containing serrated surfaces are positioned on eithe... | 12/20/1983 |
| 4399545 | Method of lowering electrodes of an electric-arc furnace A method of lowering graphite electrodes which are supported vertically displaceable electrode holders and extend through the cover of an electric arc furnace is disclosed. In accordance with the disclosed method, the furnace cover is completely laterally... | 08/16/1983 |
| 4397028 | Electrode support mechanism An electrode support mechanism for use in electric arc melting or smelting furnaces wherein a pair of horizontal, superimposed arms are each provided with clamping devices at their outer end for supporting a vertically disposed electrode depending into an... | 08/02/1983 |
| 4394765 | Electro-slag remelting furnace for consumable electrodes and having an electrode drive An electro-slag remelting furnace having consumable electrodes and a mold for receiving a melt formed from the electrode material; at least one drive motor and at least one spindle and an associated stationary spindle nut for vertical movement of the elec... | 07/19/1983 |
| 4349912 | Electrode positioning control An electrode positioning control for electric arc furnaces includes a first circuit for producing an electric error signal functionally related in magnitude and sense to the electrical parameters in the electrode. The error signal is used to control the f... | 09/14/1982 |
| 4349911 | Safety device for electrodes of an electric steel-making furnace An electronic safety device for the electrodes of an electric steel-making furnace in which the position of the electrodes is controlled by a position-regulating device. The safety device is adapted to detect when an electrode has been brought to a stop a... | 09/14/1982 |
| 4324944 | Arrangement for controlling the electrodes of an arc furnace An impedance controller is used for controlling electrode-to-bath spacing in an arc furnace. Measured quantities proportional to the electrode voltage and the electrode current are determined and an actual impedance value is formed from the measured value... | 04/13/1982 |
| 4096344 | Electric arc furnace control system This disclosure relates to an electric arc furnace control system for positionally displacing the consumable furnace electrodes. Each electrode is coupled to an electric motor and arranged for vertical height displacement in relation to the material in th... | 06/20/1978 |
| 4075414 | Apparatus for regulating the immersion depth of electrodes in electrode-melting furnaces The invention relates to a system for regulating the depth of immersion of melting electrodes in electrical slag remelting furnaces, consisting of an apparatus for the detection of the resistance and for changing this resistance upon the spatial displacem... | 02/21/1978 |
| 4029888 | Arc furnace control system An electric arc furnace control system is provided for positioning the furnace electrodes in accordance with the resistance of the arc. This is accomplished by balancing the arc current signal against a voltage signal multiplied by a signal representing t... | 06/14/1977 |
| 3937869 | Force sensing control apparatus and method for electric arc furnaces A force sensing control apparatus and method is disclosed for detecting forces which resist movement of a motor driven electrode system in an electric arc furnace. Force sensing circuitry monitors forces applied to an electrode system as it is positioned ... | 02/10/1976 |
