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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7360318 | Apparatus for aligning female connector in fixture for use in reconditioning of articulated connector An apparatus for aligning a female articulated connector while it is still mounted to the end structure of a rail car in a reconditioning fixture is disclosed. The apparatus is a centering tool having a generally annular cylindrical arc shape for placement against t... | 04/22/2008 |
| 7356938 | Bore gauge apparatus for use in reconditioning articulated connector An apparatus for measuring a reconditioned portion of an articulated connector engaged in a reconditioning fixture while it is still mounted to the end structure of a rail car is disclosed. The gauge is a generally cylindrical arc with an inner side and outer side. ... | 04/15/2008 |
| 7350827 | Cam expansion ring assembly An expansion ring assembly and method for sealingly installing a gasket within an opening in a wall of a structure. The expansion ring assembly includes an expansion ring having first and second adjacent end portions, and first and second cam members are rotatably c... | 04/01/2008 |
| 7254896 | Inner bearing split axle assembly A split axle assembly for obtaining gage measurements of a track including a first wheel with a first split axle, a second wheel with a second split axle, a first bearing for rotatably receiving the first split axle, and a second bearing for rotatably receiving the ... | 08/14/2007 |
| 7181851 | Method of tracking a track geometry In a method of tracing a track geometry immediately ahead of a ballast pick-up device of a cleaning machine in a working direction, a first and a second measuring chord are guided on the track by a respective front and rear end point. A versine measured by a first v... | 02/27/2007 |
| 7164975 | Geometric track and track/vehicle analyzers and methods for controlling railroad systems Track and track/vehicle analyzers for determining geometric parameters of tracks, determining the relation of tracks to vehicles and trains, analyzing the parameters in real-time, and communicating corrective measures to various control mechanisms are provided. In o... | 01/16/2007 |
| 7152330 | Device and method for monitoring the state of the sub-structure of fixed tracks Device for monitoring the state of the substructure of fixed tracks, especially in the transition region of substructure supporting plates, measuring bolts, which, in vertical recesses, pass freely through the track plate above, being fastened at the ends of the sub... | 12/26/2006 |
| 7059062 | Pivot gauge apparatus for measuring male articulated connector An apparatus for measuring the dimensions of an articulated connector for reconditioning while it is still mounted to the end structure of a rail car is disclosed. The connector is measured to find areas and amounts of wear on portions of the connector. The measurem... | 06/13/2006 |
| 7036232 | Apparatus for monitoring the rails of a railway or tramway line A laser apparatus for monitoring the rails of a railway or tramway line, characterized by comprising at least two measurement units mounted on a railway or tramway carriage and operating at last on the inner part of the two rails, along with said carriage is made to... | 05/02/2006 |
| 7020977 | Method of confirming dimensions during reconditioning of an articulated connector A method for confirming the dimensions of an articulated connector while it is still mounted to the end structure of a rail car is disclosed. The connector is measured by use of a gauge secured to a reference point on portions of the connector. Another portion of th... | 04/04/2006 |
| 6976324 | Method of scanning a track bed profile A method for the contactless scanning of a track bed profile extending perpendicularly to a longitudinal extension of the track, comprises the steps of simultaneously effectuating the scanning and a measurement of any deviation from a desired track level at a locati... | 12/20/2005 |
| 6564467 | Railway wheel monitoring During use, a wheel of a railway vehicle may become out of round, which will be detrimental to both the vehicle suspension and the railway track. The shape of such a wheel may be monitored to detect any such out of roundness, while the wheel is rolling, b... | 05/20/2003 |
| 6292997 | Pre-plating of wooden railroad ties Methods are disclosed by which wooden railroad ties are pre-plated prior to use in constructing and/or repairing railroad lines. Methodology disclosed comprises placing two plates on top of each of a succession of wooden ties, temporarily positioning disc... | 09/25/2001 |
| 6272759 | Sideframe wheelbase gauge A gauge is provided that is useful in measuring the horizontal wheelbase of a railway freight car truck sideframe. The gauge itself is comprised of a main horizontal body section usually of a single piece of aluminum bar stock. A stationary depending leg ... | 08/14/2001 |
| 6230417 | Level crossing adjusting device The gauge and cess panels (3, 4) of a level crossing creep apart lengthwise of the track (1, 2) and need closing up again from time to time. A device (5, 24) for this consists of a member (8, 26) that engages under or over a rail (1) and has a portion (10... | 05/15/2001 |
| 6154973 | Method for correcting the track geometry of a track A method for correcting the track geometry of a track, includes measuring an initial track position of the track following lifting of the track and tamping under the track, and so computing a final desired track position as to eliminate long-wave alignmen... | 12/05/2000 |
| 5987979 | Method and apparatus for detecting railtrack failures by comparing data from a plurality of railcars A technique for monitoring anomalies in a railway system 400 to predict a future track behavior. The technique uses a motion sensor 207, 209 operably coupled to a chassis of a rail car 101 to detect a possibility of an event which may correspond to an ano... | 11/23/1999 |
| 5791063 | Automated track location identification using measured track data A method and apparatus is provided for accurately locating a train or a track repair vehicle along the track, or to locate accurately a track defect. When measuring track geometry, i.e. gage, cross level, warp, the measuring device moves foot by foot alon... | 08/11/1998 |
| 5746135 | Self-steering railway truck A railway truck includes a frame having a pair of side frames and laterally extending transoms therebetween. A plurality of journal boxes are resiliently suspended from the side frames and support a pair of longitudinally spaced apart end axles extending ... | 05/05/1998 |
| 5660470 | Rail mounted scanner A housing having a base having a cavity within which a temperature scanner module may be mounted and which is readily clamped to a rail of a railroad track so that a scanner may detect an over-heated wheel or wheel bearing. The base includes a rail clamp ... | 08/26/1997 |
| 5397083 | Rail guard A rail guard for monitoring the limits of transverse inclination and extension between the rails of a railroad track and transmitting an indication when these limits are breached. The rail guard has a plurality of tension switches, each switch being coupl... | 03/14/1995 |
| 5189798 | Alignment gauge An alignment gauge to facilitate the measurement of welded joints and the alignment of elongated structures including beams, pipes, rails, such as train rails and trolley car rails. The alignment gauge has five basic components, a base, an upright member ... | 03/02/1993 |
| 5181327 | Loadwidth gauge for railway cars A gauge for determining the maximum width of a load of material supported on a railway car has an elongated, upstanding boom and car side sill engaging feet extending transversely of one side of the boom. A gauge support is mounted on the opposite side of... | 01/26/1993 |
| 4965940 | Method and apparatus for aligning a sawmill guide rail A saw mill guide rail capable of being quickly, easily and accurately aligned to the saw blade, having two intersecting surfaces machined into the head of the rail, each parallel to the rail head length and extending for the length of the rail, one being ... | 10/30/1990 |
| 4958440 | Stacker alignment device A device for facilitating the field alignment of the drive and idler wheels of a rail supported S/R machine. Vertical alignment is determined by means of a spirit level at the end of a pivotally mounted bar which is initially set perpendicular to a surfac... | 09/25/1990 |
| 4904939 | Portable electronic wheel wear gauge A portable, battery powered, electronic wheel wear gauge is described for use in train wheel wear measurements. The gauge consists of a portable computer controller electrically connected to a portable gauge head. The gauge automatically determines proper... | 02/27/1990 |
| 4324048 | Locator for rail aligning device A horizontal locator for a rail alignment device engages the sides of the rail head only at points vertically remote from the running surface of the rail whereby deformation of the rail head adjacent the running surface does not adversely affect the accur... | 04/13/1982 |
