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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 5300983 | Image shifting by control patch Method and apparatus for control of cross-track registration of a web member in an image forming apparatus, such as a photocopier or printer. A control patch is laid down on the web member and toned. After toning, the amount of toner for a particular sect... | 04/05/1994 |
| 4975697 | Measuring arrangement In a measuring arrangement for the spacing between a marking (32) on a displaceable marking carrier (30) and a reference line, to produce a high degree of resolution and a low scanning frequency, at least two electrodes (17, 18) defining a measuring gap (... | 12/04/1990 |
| 4777482 | Finger-touch coordinate input apparatus including a supply of air for dust removal A finger-touch coordinate input apparatus according to the present invention comprises printed circuit boards provided between a display screen and its front frame and having light-emitting and light-receiving element groups thereon, and LED filters provi... | 10/11/1988 |
| 4517559 | Optical gating scheme for display touch control A touch-operated display for a CRT faceplate includes a plurality of optical gates for energizing light-emitting diodes in response to generation of the CRT raster thus eliminating the need for external switching of the beam generating means to produce th... | 05/14/1985 |
| 4484179 | Touch position sensitive surface A touch sensitive device is arranged with substantially parallel surfaces which are at least partially transparent to light. A flexible membrane is supported above the top surface of the screen and when the overlay is flexed into contact with the screen, ... | 11/20/1984 |
| 4459476 | Co-ordinate detection system The invention is directed to an X-Y co-ordinate detection system of the type which generates intersecting paths of radiation across a surface which may be, for example, a touch panel of the cathode ray tube type. Less expensive and more reliable operation... | 07/10/1984 |
| 4346376 | Touch position sensitive surface A touch sensitive device is arranged with substantially parallel surfaces inside which light from a synchronized source, such as a CRT, can become trapped by total internal reflection. The edges of the device are fitted with photodetectors which respond t... | 08/24/1982 |
| 4305071 | Touch sensitive screen signal detection arrangement In certain situations it is necessary to detect a slight change in a continuous wave signal and to be able to specifically determine the exact position of the change. This is especially necessary in situations where a continuously changing signal (with re... | 12/08/1981 |
| 4122438 | Position encoding arrangements A position encoding arrangement is provided having a position locating area from which the positioned co-ordinates of a probe in the area can be found. The invention provides for a change of magnification of the arrangement so that movement of the probe p... | 10/24/1978 |
| 4073586 | Arrangement for projecting images of markers on to a photosensitive surface in a telecine equipment In a telecine equipment of the flying spot cathode-ray tube type with an oscillatory mirror, markers associated with the frames of a film are illuminated with a light spot of small dimensions, which substantially follows the motion of the marker associate... | 02/14/1978 |
| 4021724 | Apparatus for use in determining a characteristic of a cathode ray tube Test apparatus for a cathode ray tube has optical elements disposed along two optical paths from the screen of a cathode ray tube to two photosensors. One optical path passes through a graticule which has a pattern of light transmissive and non-transmissi... | 05/03/1977 |
| 3997891 | Light pen detection system A light pen detection system used for a display system using a cathode ray tube (CRT) in which the operation for detecting the character display position on the CRT face is started when the operation switch of the light pen is turned on, and repeatedly pr... | 12/14/1976 |
| 3941997 | Method and a device for localizing a light impact on the photocathode of a photomultiplier A light impact on the photocathode of a photomultiplier is localized by defocusing the beam of emitted photoelectrons, sweeping the surface of the photocathode by means of a localized electric field which is located in the vicinity of the photocathode and... | 03/02/1976 |
