Patents Assigned to Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
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Patent number: 6181080Abstract: The invention relates to a circuit arrangement for operating at least one electrodeless discharge lams (LP1) having at least one voltage input (j10, j11) for supplying voltage to the circuit arrangement and electrical terminals (j12, j13) for at least one electrodeless discharge lamp (LP1). The circuit arrangement has supervisory means which ascertain the presence or the absence of the at least one electrodeless discharge lamp (LP1) at the electrical terminals (j12, j13) and enable the provision of the ignition or operating voltage for the at least one electrodeless discharge lamp (LP1) only when the at least one electrodeless discharge lamp (LP1) is connected to the electrical terminals (j12, j13).Type: GrantFiled: September 20, 1999Date of Patent: January 30, 2001Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Gotthard Schleicher
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Patent number: 6181081Abstract: The invention relates to a pulse starting device and a starting method for a discharge lamp, in particular a high-pressure discharge lamp for a motor vehicle headlamp. The starting device has a transformer which has either two primary windings which are connected in parallel and are both coupled inductively to the at least one secondary winding, or instead has a primary winding which consists of a wide metal strip and is wound, separated by an electric insulation, over the at least one secondary winding. The starting device according to the invention has a compact design which permits the complete starting device to be accommodated in the lamp cap.Type: GrantFiled: January 20, 1999Date of Patent: January 30, 2001Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Guenther Hirschmann, Juergen Becker, Gerhard Behr, Christian Wittig, Peter Helbig
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Patent number: 6181074Abstract: A circuit for operating a discharge lamp wherein a variable representing an operating state of the lamp is stored in an operating state storage device. A changeover device switches over between a plurality of operating states of the lamp. The operating state storage device is activated by each relatively short interruption of power to the operating circuit and switches over to an operating state other than that represented by the stored variable. A timer circuit separate from the operating state storage device is coupled to the voltage supply terminal of the operating state storage device and defines a specific time for distinguishing relatively long interruptions of the power supply from relatively short ones.Type: GrantFiled: March 26, 1999Date of Patent: January 30, 2001Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Klaus Fischer
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Patent number: 6172890Abstract: By adding a base bridging capacitor (C6, C6′) between the base connections of a bipolar transistor bridge oscillator, in particular of an electronic ballast for a low-pressure gas discharge lamp, the collector initial current peak is avoided, while ensuring that the switching transistors (T1, T2) are switched on, without any voltage, at the right time.Type: GrantFiled: December 27, 1999Date of Patent: January 9, 2001Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Felix Franck
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Patent number: 6172467Abstract: A method for producing pulsed-voltage sequences for the operation of discharge lamps (8) by means of a pulsed discharge which is impeded dielectrically provides that the pulsed-voltage sequence is composed of two partial voltage sequences in such a manner that the magnitudes of the peak values of each partial voltage sequence are less than the magnitudes of the peak values of the resultant pulsed-voltage sequence, for example half as large. This has the advantage that correspondingly less EMI is generated when the partial-voltage sequences are produced. In addition, the two partial voltage sequences contain rising flanks of opposite gradient with respect to a reference-earth potential, the two partial voltage sequences preferably being inverted with respect to one another. This provides ideal complete compensation for the electromagnetic interference (EMI) produced by the two partial voltage sequences, at least locally.Type: GrantFiled: April 12, 1999Date of Patent: January 9, 2001Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Frank Vollkommer, Lothar Hitzschke
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Patent number: 6161598Abstract: A method for producing helically wound filament elements, and filament elnts produced according to this method. The method is distinguished in that a thermal treatment of the incandescent wire at temperatures of over 1200.degree. C. takes place already before the winding of the incandescent wire, so that, after separation, the coil springs open and can easily be detached from the core wire.Type: GrantFiled: March 31, 1998Date of Patent: December 19, 2000Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbHInventors: Juergen Eder, Hans Liermann, Peter Schmidt, Reinhard Sprenger
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Patent number: 6161694Abstract: The invention relates to a unit pack for a linear lamp. The pack is desig as a single-piece tubular folding box. It has four side walls (10, 11, 12, 13) which form a tubular sleeve of trapezoidal cross section. At its top end, the folding box is provided with an integrally formed hanging tab (15).Type: GrantFiled: February 7, 2000Date of Patent: December 19, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Horst Gedack
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Patent number: 6163114Abstract: In an operating circuit for a low-pressure discharge lamp, the lamp current is controlled depending on the lamp temperature or the luminous flux.Type: GrantFiled: July 29, 1999Date of Patent: December 19, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Klaus Fischer, Ludwig Reiser
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Patent number: 6160341Abstract: An electric incandescent lamp with a rotationally symmetrical lamp bulb and an IR radiation reflecting coating has an ellipsoidal partial contour. ellipsoidal partial contour of the lamp bulb is produced by an elliptical section, the semiaxis of which is oriented vertically to the longitudinal axis, i.e., vertically to the rotational axis of the lamp bulb, and is longer than the greatest radius of the lamp bulb. The length of the smallest semiaxis lies preferably in the range of R<b<R+5.multidot.w.sub.x, wherein R and w.sub.x denote the largest radius of the lamp bulb and the radius of the rotational symmetrical luminous element, respectively. The lamp is characterized by uniform back reflection of IR radiation onto the luminous element arranged centrally inside the lamp bulb, and thus by a uniform temperature distribution and increased efficiency.Type: GrantFiled: September 11, 1998Date of Patent: December 12, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Ulrich Binder, Sigbert Mueller
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Patent number: 6153982Abstract: The invention relates to a discharge lamp whose discharge vessel (1) is pided with a light-transmitting, electrically conductive layer (4) in order to improve the electromagnetic compatibility of the lamp when it is operated from an electronic operating unit. The light-transmitting, electrically conductive layer (4) is advantageously connected to the circuitry-internal ground potential of the operating unit.Type: GrantFiled: August 23, 1999Date of Patent: November 28, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Thomas Reiners
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Patent number: 6153974Abstract: As its filling, a halogen incandescent lamp contains noble gas, halogen additive, carbon as well as nitrogen and oxygen in the form of a nitrogen-oxygen compound, preferably N.sub.2 O.Type: GrantFiled: September 15, 1999Date of Patent: November 28, 2000Assignee: Patent-Treuhand-Gesellschaft fuer Elektrische Gluehlampen mbHInventors: Thomas Noll, Karlheinz Vogl, Rudolf Horndasch, Matthias Damm
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Patent number: 6144568Abstract: The invention relates to a circuit arrangement for operating electrical lamps which encompasses an invertor (WR) with oscillation build-up circuit (trigger generator), comprising diac (DC1) and drive circuit. The drive circuit comprises a high-pass filter, in particular an RC high-pass filter (R1, C1). As a result, the trigger initiation is shifted closer to the zero crossing of the supply voltage. This means, in turn, that a more sinusoidal power supply current consumption with a smaller proportion of harmonics is obtained. In addition, more stable lamp operation is achieved in combination with power supply segment control dimmers.Type: GrantFiled: May 12, 1999Date of Patent: November 7, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Felix Franck, Theodor Kiermeier
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Patent number: 6111344Abstract: An electric filament incandescent in lamp, in particular a halogen incandent lamp (9) with a rotationally symmetrical lamp bulb (10) and I.R. radiation reflecting coating (14), has an ellipsoidal partial contour. The ellipsoidal partial contour of the lamp bulb is produced by an elliptical section, the large semiaxis, and, consequently focal axis of which is oriented vertically to the longitudinal axis, i.e. vertically to the rotational axis of the lamp bulb (10). The length of the large semiaxis (a) lies preferably in the range R<a<R+5.multidot.w.sub.r, wherein R and w.sub.r respectively stand for the greatest radius of the lamp bulb (10) and the radius of the cylindrical luminous element (15). The lamp (9) is characterized by uniform back reflection of the I.R. radiation onto the cylindrical luminous element (15) arranged centrically on-axis inside the lamp bulb (10), and thus by a regular temperature distribution, as well as by increased lamp efficiency.Type: GrantFiled: September 11, 1998Date of Patent: August 29, 2000Assignee: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen mbHInventors: Ulrich Binder, Sigbert Mueller
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Patent number: 6107758Abstract: A circuit is described with which an operation circuit for a discharge lamp can be switched between operation states with different lamp currents by hort interruptions of the power supply. Long interruptions than a certain time threshold result in basic state operation.Type: GrantFiled: September 23, 1999Date of Patent: August 22, 2000Assignees: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH, STMicroelectronics S.r.l.Inventors: Klaus Fischer, Roberto Gariboldi, Giuseppe Cantone
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Patent number: 6105759Abstract: A folding carton for an elongated object, such as a double ended electric mp is disclosed. The carton includes cut out retentions formed in the end flaps of the carton to position the elongated object.Type: GrantFiled: October 5, 1999Date of Patent: August 22, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Michael Fuchs, Herbert Roderwieser
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Patent number: 6104142Abstract: In the circuit arrangement for the high-frequency operation of a low-power ow-pressure discharge lamp (LP) having a mains rectifier (2) and a half-bridge circuit, a diode (D1) is connected in series and in the DC non-conducting direction in the connecting line between the second electrode (E2) of the lamp (LP) and the positive or negative pole of the rectifier (2). Moreover, the tap (M2) between the diode (D1) and the second electrode (E2) is connected to the other pole of the mains rectifier (2) via a capacitor (C1), and a resistor (R9) is connected in parallel with the diode (D1). The circuit thus created acts as a passive harmonic filter which fulfills for the circuit arrangement the IEC regulations of class D with reference to line current harmonic content.Type: GrantFiled: April 2, 1999Date of Patent: August 15, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Anton Zuchtriegel
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Patent number: 6097155Abstract: A fluorescent lamp (1) having a tubular discharge vessel (2), filled with ert gas, and a fluorescent layer (6) has elongated electrodes (3; 4; 12; 14a-14d) arranged parallel to the longitudinal axis of the tubular discharge vessel (2), at least one electrode (4; 12; 14a-14d) being arranged on the inner wall of the discharge vessel (2). The tubular discharge vessel (2) is sealed in a gas-tight fashion at one or at both ends with a stopper (8) and by means of solder (9), the at least one inner wall electrode (4) being guided to the outside in a gas-tight fashion through the solder (9). Alternatively or also in addition, at least one electrode (16) is arranged inside the wall of the discharge vessel (2). Up to a maximum of the entire inside diameter can be used as striking distance, depending on the positioning of the associated counterelectrode(s). High luminous densities are achieved because of the large and, at the same time, constant striking distance along the discharge tube.Type: GrantFiled: December 18, 1998Date of Patent: August 1, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Frank Vollkommer, Lothar Hitzschke, Simon Jerebic
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Patent number: 6095866Abstract: The invention relates to an electric lamp, more particularly to a lamp for motor vehicle, the cap of which is provided with a metal support sleeve (53) constructed in the shape of a ring and at least one pressure spring (1) for securing the lamp in the lampholder. The at least one pressure spring (1) is constructed as a cambered leaf spring whose ends (11, 12) bear against the inner wall of the support sleeve and which has a V-shaped region (100) which reaches through a cutout (53b) in the support sleeve (53).Type: GrantFiled: August 18, 1998Date of Patent: August 1, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventors: Peter Helbig, Hermann Steiner, Hans Wild
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Patent number: 6082873Abstract: The present invention relates to a connecting accessory 10 for fluorescent amps, comprising two lampholders 16 constructed separately from one another and mutually spaced for holding the corresponding connecting ends of the fluorescent lamp 14. In this case, the lampholders 16 are each arranged in a holder receptacle 18. Moreover, the holder receptacles 18 each have an integrated device for the strain relief of electric connecting lines 22 leading to a ballast or coming therefrom.Type: GrantFiled: July 15, 1998Date of Patent: July 4, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Claus Schmidt
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Patent number: 6078144Abstract: The electronic ballast has a rectifier arrangement (1)--which is fed by AC power supply voltage (U)--with active step-up converter (SW2), a storage capacitor (C2), a network for limiting an inrush current and two outputs, at which a stabilized DC voltage (U+) referred to housing ground as reference potential (Uref) is output. An inverter (2) is connected to the rectifier arrangement, a load circuit (3) with at least one fluorescent lamp (La1 and/or La2) being assigned to said inverter on the output side. The inverter has a converter network (T1/1, T1/2, C1, SW3, SW4), preferably designed as a push-pull circuit, with two bridge paths, which, in the steady-state operating condition, are alternatively switched through to the reference potential. In this case, the switching network for limiting the inrush current comprises a limiting resistor (R1), which, in series with the storage capacitor (C2), is connected to reference potential.Type: GrantFiled: July 2, 1999Date of Patent: June 20, 2000Assignee: Patent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbHInventor: Rene Twardzik