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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 4250372 | Process and apparatus for the heat treatment by high energy beams of surfaces of steel products A first high energy beam is projected against a first flank surface of a substantially V-shaped steel surface, and simultaneously thereto a second a high energy beam is projected against a second flank surface of the V-shaped surface. The high energy beam... | 02/10/1981 |
| 4250374 | Process and apparatus for the surface heat treatment of steel products by a laser beam A single laser beam transmitter directs a substantially parallel laser beam toward a substantially V-shaped steel surface including first and second flank surfaces. A convex lens has a focal length (f) which meets the condition of r/fࣙ0.268, wherein (r)... | 02/10/1981 |
| 4219721 | Marking of lenses A laser beam is used to provide rapid, clear and permanent marking of plastic lenses.... | 08/26/1980 |
| 4218606 | Apparatus for perforating webs with high intensity, coherent radiation A system is provided for controlling the porosity of a web or film as perforated by high intensity, coherent radiation. In particular, there is included a laser for providing at least one beam of high intensity, coherent radiation that is directed onto a ... | 08/19/1980 |
| 4172219 | Daylight projection screen and method and apparatus for making the same A layer of material which absorbs incident focussed laser light and undergoes a resultant heating is arranged in the focal plane of a lens matrix. Laser light is projected onto such layer through the lens matrix itself. The laser light is focussed by the ... | 10/23/1979 |
| 4144888 | Device for treatment by laser emission A wavebeam guide transmitting the laser emission to a selected region of a patient comprises only two mirrors; an input mirror and a output mirror, which mirrors are mounted in units of the device connected by a telescopic shaft. The input mirror is mount... | 03/20/1979 |
| 4136298 | Electrode-inlead for miniature discharge lamps An electrode-inlead assembly comprises a small tungsten pin which is joined on axis to a fine molybdenum wire adapted to sealing through fused silica. The join is effected by a laser butt weld which permits a symmetric compact seal thereby making possible... | 01/23/1979 |
| 4116542 | Method and apparatus for reducing coherence of high-power laser beams Method and apparatus for reducing the coherence and for smoothing the power density profile of a collimated high-power laser beam in which the beam is focused at a point on the surface of a target fabricated of material having a low atomic number. The ini... | 09/26/1978 |
| 4079230 | Laser working apparatus The laser light emitted from a laser generator is cast on two prisms which have the same angle of deflection and are supported rotatably by support members so as to be rotated about the optical axis of the laser light in the opposite directions at the sam... | 03/14/1978 |
| 4069080 | Method and apparatus of bonding superposed sheets of polymeric material in a linear weld A cylindrical lens system is used to focus a laser beam into a line upon thermoplastic sheets in their area of contact thereby linearly welding the sheets together. By this method flattened thermoplastic tubing may be converted into bags with either strai... | 01/17/1978 |
| 4057332 | Peripherally cooled laser lens assembly A fluid cooled lens assembly is provided which comprises a housing mounting a lens or window where a window is a lens with infinite radius of curvature therein and a cooling passage included in said housing for directing coolant fluid around the lens peri... | 11/08/1977 |
| 4042006 | Pyrolytic process for producing a band-shaped metal layer on a substrate A band-shaped metal layer useful as a resistance layer and/or a contact layer is pyrolytically deposited onto a cylindrical substrate by surrounding the surface of the substrate with a mixture of a thermally decomposable metal compound and a carrier there... | 08/16/1977 |
| 4027137 | Laser drilling nozzle A laser beam is applied to a workpiece by means of a spring-loaded metal nozzle which engages the workpiece. An aperture in the workpiece end of the nozzle accurately defines the size of the hole formed in the workpiece by the laser beam. A chamber locate... | 05/31/1977 |
| 4001840 | Non-photographic, digital laser image recording A non-photographic, digital laser image recording and reading method and apparatus for recording and reading visual, two-dimensional replicas or representations of objects, pictures, illustrations, computer outputs and the like. A flat-field twin objectiv... | 01/04/1977 |
| 3993402 | Apparatus for directing a laser beam Apparatus for directing a single laser beam to several predetermined positions on a workpiece. In a preferred embodiment of this invention, a laser beam is deflected from a plurality of rotating mirrors which sequentially intersect the laser beam thereby ... | 11/23/1976 |
| 3981705 | Method of making optical waveguides from glass fibers A procedure is described for drawing glass fibers which are particularly suitable for use in optical waveguides. A laser is used as a souce of heat and an optical system is provided for focusing an annular beam around a glass preform from which the glass ... | 09/21/1976 |
| 3941973 | Laser material removal apparatus A laser material removal apparatus and method of removing material from a workpiece wherein a laser forms a beam of radiation having a substantially circular cross-sectional configuration, and optical means is provided for compressing portions of the beam... | 03/02/1976 |
