Patents by Inventor Clemens Barthelmes

Clemens Barthelmes 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: 5831388
    Abstract: A projection lamp includes a metal halide discharge lamp (1) with a lightansparent discharge vessel (2) in which two electrodes (3) stand opposite one another, which are joined with current leads (5) led to the outside, whereby the discharge vessel contains an ionizable filling including mercury, at least one noble gas, at least one halogen, one rare-earth metal (RE) as well as another metal, niobium, for the formation of metal halides. The addition of metallic niobium provides the lamp with good color reproduction and good arc stability.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: November 3, 1998
    Assignee: Patent-Truehand-Gesellschaftfuer Elektrische Gluelampen mbH
    Inventors: Andreas Genz, Joachim Dirks, Hans Werner Golling, Clemens Barthelmes
  • Patent number: 5729091
    Abstract: A metal halide discharge lamp with a coaxial discharge vessel (2) and outer ulb (9) contains a fill of metals with a tendency to diffusion. Their specific content is less than 6 .mu.mols/cm.sup.3. The current supply leads (4, 5) are surrounded, over a large portion of their length, by a sheath (14) that is UV-shielded.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: March 17, 1998
    Assignee: Patent-Treuhand-Gesellschaft F. Electrische Gluehlampen mbH
    Inventors: Clemens Barthelmes, Andreas Hohlfeld, Jurgen Vom Scheidt, Dietrich Fromm
  • Patent number: 5691601
    Abstract: A metal-halide discharge lamp for photooptical purposes has a small electe spacing of less than 15 mm, preferably 2-8 mm, to provide an essentially pin-point light source, and a fill which contains AlI.sub.3 in an amount between 0.1 and 4.5 mg/cm.sup.3. Other filling components may in particular be halides of mercury, indium, thallium or cesium; up to 2 mg/cm.sup.3 of AlBr may be added. The lamp is particularly adapted for combination with a, preferably parabolic, reflector.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: November 25, 1997
    Assignee: Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbH
    Inventors: Anna-Maria Frey, Jurgen Maier, Manfred Pilsak, Ralf Seedorf, Clemens Barthelmes, Thomas Dittrich
  • Patent number: 5689154
    Abstract: A metal halide gas discharge lamp for projection purposes includes a discge vessel closed at both ends preferably has between the electrodes a central frosted partial area applied on the outer surface of the discharge vessel. The relationship 0.1<B.ltoreq.1, preferably 0.4<B/d<0.8, applies to the quotients of the width B of the frosted partial area by the inter-electrode gap d. The lamp is optionally provided on one or both sides with heat build-up coatings. The lamp advantageously forms a unit with an optical reflector.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: November 18, 1997
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Clemens Barthelmes, Thomas Dittrich, Ralf Seedorf
  • Patent number: 5369334
    Abstract: To optimize operating conditions with respect to overall size of a high-psure discharge lamp having a metal halide fill, the wall thickness (d) in millimeters is selected in accordance with a theoretical optimum relationship of d=1.5+0.1.times..cuberoot.P, in which P is the power rating of the lamp, in watts. The optimal theoretical thickness should not vary by more than .DELTA.d=.+-.0.2.times..sup.d, in millimeters, from the theoretical optimal value, with lower power ratings permitting a thinner wall thickness than higher power ratings. Optimizing the wall thickness improves the color rendition index and the light distribution of the emitted light, as well as decreasing the devitrification of the quartz glass of the discharge vessel.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: November 29, 1994
    Assignee: Patent-Treuhand-Gesellschaft F. Flektrische Gluehlampen mbH
    Inventors: Hans-Werner Goelling, Clemens Barthelmes
  • Patent number: 5144192
    Abstract: To prevent electrolytic current flow between adjacent sealing foils (6,7; 15) within a pinch seal (10, 13) at the operating temperature of the pinch seal, in operation of the lamp, the pinch seal is formed with a pinch seal section which has a thickness which is reduced with respect to the pinch seal outside of the region between the foils, for example in form of a slit or a notch or a thin quartz glass web of, at the most, 3 mm thickness. This reduced section, thus, has a resistance which is a multiple of the resistance which the pinch seal, between the foils, would have if the pinch seal would be of uniform thickness throughout its cross section; this reduced section (11, 18) starts at the outer terminal end of the pinch seal (10, 13) and extends up to at least about the ends of the foils (6, 7; 14, 15) proximate to said bulb portion.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: September 1, 1992
    Assignee: Patent Treuhand Gesellschaft fur elektrische Glunlampen m.b.H.
    Inventor: Clemens Barthelmes
  • Patent number: 5107177
    Abstract: With high-pressure discharge lamps, and, more specifically, ultra high-prure discharge lamps, the electrode shafts (4, 5) are located within cylindrical elongated necks (2, 3) of quartz glass extending from the arc tube (1). To prevent adhesion of quartz from the cylindrical elongated necks (2, 3) of the arc tube (1) upon melt-sealing the necks (2, 3) to the electrode shafts (4, 5), the electrode shafts (4, 5) are surrounded by flexible tissue or fabric hoses, tubes or braids (21, 22), made of highly heat-resistant, electrically insulating inorganic material, for example made of quartz fibers. The tissue hose has an inner diameter which corresponds at least to the outer diameter of the eletrode shaft (4, 5) and is not more than 0.5 mm greater than the electrode shaft.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: April 21, 1992
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Clemens Barthelmes, Andreas Hohlfeld
  • Patent number: 5037342
    Abstract: To make a lamp of quartz or hard glass which has a bulb (10, 22) which does ot have an exhaust tip, for example a metal halide high-pressure discharge lamp or a halogen incandescent lamp, the glass bulb is formed by blow-molding the bulb to the desired shape, then retaining an electrode system having electrodes (14, 14a) to be placed in the bulb, current supply leads (12, 24) extending externally of the bulb, and sealing foils (13, 23) connecting the current supply leads to the electrodes in a holder die (11, 25), introducing the electrodes by moving the holder die towards the bulb, flushing the bulb by introducing and selectively removing flushing gas through an open end of the tube, introducing a measured quantity of a fill substance, such as mercury, an iodide or the like, into the bulb through the open end thereof, and then heating the bulb in the region of the position of the sealing foils and pinch-sealing the bulb. Excess glass is then cut off and the bulb can be supplied with a base.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: August 6, 1991
    Assignee: Patent Treuhand Gesellschaft fur Elektrische Gluhlampen m.b.h.
    Inventors: Clemens Barthelmes, Axel Bunk
  • Patent number: 5001395
    Abstract: To protect tungsten electrode shafts (2, 3; 15, 16) extending into the a rtz glass discharge chamber (13, 27) of a high-pressure discharge lamp from attack by metal halides included in the fill to improve the color rendition of the discharge, the electrode shafts (2, 3; 15, 16) are tightly surronded by small tubes (11, 12; 25, 26) of electrically insulating material, which is highly temperature resistant, located in part within the press seal (10; 23, 24) and fitted against the ends of sealing foils (6, 7; 19, 20) which face the discharge chamber. The tube elements extend at least about 0.5 mm beyond the inner ends of the press seal (10; 23, 24) into the discharge chamber (13, 27) and are formed of a material which has a thermal coefficient of expansion which is not lower than that of quartz glass and not higher than that of tungsten.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: March 19, 1991
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen m.b.H.
    Inventors: Clemens Barthelmes, Axel Bunk
  • Patent number: 4948530
    Abstract: In the method for making a reflective coating at the ends of the discharge essel of a high-pressure discharge lamp, the suspension for making the coating includes from 0.5 to 5% by weight of a highly dispersed pyrogenic silicic acid - aluminum oxide mixture, 0 to 5% by weight of acetic acid, 0 to 1% by weight of boric acid, 24 to 55% by weight of water, and zirconium oxide to make up 100% by weight. By using the novel suspension, the previously required process steps of baking and white-burning can be omitted.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: August 14, 1990
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen m.b.H.
    Inventors: Clemens Barthelmes, Andreas Hohlfeld, Lothar Vollmer