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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8056250 | Rotary disk eccentricity measurement method, rotary encoder, and rotary member control device An eccentricity measurement method of measuring the eccentricity between a center of a connection portion of a rotary disk of a rotary encoder connected to a rotary shaft of a rotary member, and a center of a scale provided at the periphery of the rotary disk. The m... | 11/15/2011 |
| 8020309 | Circularity measuring apparatus A circularity measuring apparatus includes: a rotary table on which a measured object is loaded; a contact-type stylus configured to contact a substantially circular measured surface of the measured object with an inclination; a holder configured to hold the stylus ... | 09/20/2011 |
| 7937849 | Concentricity sensor and methods of use and application A method for measuring concentricity of one cylindrical member arranged in a second cylindrical member includes the steps of inserting a tool in the second cylindrical member, moving a first set of elements carried by the tool into engagement with the inner surface ... | 05/10/2011 |
| 7497026 | Method and system for detection of wafer centering in a track lithography tool A system for measuring substrate concentricity includes a substrate support member adapted to rotate a substrate around a substantially vertical axis. The substrate includes a mounting surface and a process surface. The system also includes a spin cup positioned bel... | 03/03/2009 |
| 7469484 | Device and method for the centrally tightening rotatingly drivable parts A device and a method are disclosed for centrally tightening rotatingly drivable parts. The device comprises at least three units for clamping and adjusting a part, wherein at least two of the units comprise an actuator allowing controlled adjustment in radial direc... | 12/30/2008 |
| 7461462 | Device, method, computer program product, and carrier for indicating at least one of an orbit of, and a deviation from a nominally round surface A device is provided for measuring roundness of a mechanical object even if the mechanical object performs an orbit movement. The orbital movement and the surface roundness are separated. It is even possible to divide the orbital movement into an x component and a y... | 12/09/2008 |
| 7461463 | Eccentricity gauge for wire and cable and method for measuring concentricity A device for measuring the location of a conductor within an insulating sheath using three measuring planes, in which at least one measuring plane is able to locate the conductor and at least one is able to locate the periphery of the outer sheath. ... | 12/09/2008 |
| 7412778 | Apparatus for dimensional and/or geometric checking of mechanical parts A checking apparatus, for example a plug gauge, for checking diameters and/or geometrical features of mechanical parts includes a support structure (1) and checking means (20,21) coupled to the support structure, with mutually movable feelers (36 | 08/19/2008 |
| 7392595 | Device for measuring the roundness of a railroad wheel A measuring device on at least one rail of a railway track for measuring the roundness of an individual railway vehicle wheel during running thereof on the rail as a difference of the circumferential radius of the wheel flange top and the radius of the running tread... | 07/01/2008 |
| 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 |
| 7350309 | Extendable spacer device A spacer device for laser-optical measurement of hollow cylinders has at least two, preferably three arms which are coupled or interlaced with one another and which can be moved relative to one another. Each of the arms has a measurement roller on one end which is b... | 04/01/2008 |
| 7346997 | Validating device for validating formed parts This invention provides a validating device for validating at least one dimension of a part as being at least a minimum magnitude. It may also validate a dimension of a part as being no greater than a maximum magnitude or between a minimum magnitude and maximum magn... | 03/25/2008 |
| 7325324 | Method for the in-process dimensional checking of orbitally rotating crankpins An apparatus for checking the diameter of crankpins of a crankshaft in the course of the machining in a grinding machine includes a Vee-shaped reference device, a measuring device associated with the reference device and including a feeler axially movable along the ... | 02/05/2008 |
| 7310890 | Apparatus for automatically measuring external and internal profile of a pipe at the end thereof An apparatus for automatically measuring the internal and external profile of pipes (1) at the ends thereof is described, wherein sensors (11a, 11b) measure for each angle of rotation of their support (10) the distance of th... | 12/25/2007 |
| 7290348 | Device for measuring circularity and cylindrical shape The invention provides a circularity and cylindrical shape measuring device that can decrease the measurement errors generated due to the weight of a measured workpiece. A circularity and cylindrical shape measuring device (10) is configured such that a rotat... | 11/06/2007 |
| 7267018 | Steering lock system inspection device A steering lock system includes at least an ignition switch and a locking mechanism capable of inhibiting the turning of a steering shaft. In a state in which the steering lock system is retained by a retaining means on a support table, a movable table is moved towa... | 09/11/2007 |
| 7231314 | Method and apparatus for measuring wall thickness, ovality of tubular materials The wall thickness and ovality of a tubular are simultaneously determined. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device conventionally used to measure the wall thickness of tubulars is adapted to also mea... | 06/12/2007 |
| 7225554 | Apparatus and method for measuring a human head The invention relates to apparatus and methods for measuring a human head. The apparatus disclosed herein involve the use of linear rulers, or rotating contacting members, coupled to a support member. The apparatus disclosed herein can be positioned on a human head,... | 06/05/2007 |
| 7188429 | Dimensional gage with hollow spindle A dimensional gage adapted to make measurements on a workpiece has a fixed member, a spindle assembly comprising a hollow spindle which receives the fixed member and is rotatable with respect to the fixed member, a motor which rotates the spindle assembly, and a sen... | 03/13/2007 |
| 7187457 | Apparatus for measuring sizes of articles An apparatus for measuring sizes of articles including a light projecting device for projecting light toward an article placed on a stationary transparent plate from one side of the plate, a photo-sensor device arranged on the other side of the plate and having plur... | 03/06/2007 |
| 7159477 | Apparatus for inspecting deformation of pipes An apparatus is provided for measuring deformation of a surface of a pipe. The apparatus has a central portion to which a detector section is mounted. At each side, guides are connected to the housing via arms. The housing has a platform below which an inverted U-sh... | 01/09/2007 |
| 7137210 | Measuring head According to the measuring head, the zero point and the amount of front travel settings are facilitated. Firstly, the amount of front travel is set by allowing contacts 34, 34 to abut a master 50. Then, rotating the lever 42 in a direction indic... | 11/21/2006 |
| 7100265 | Method for aligning a drum assembly used in a video recording device Methods and apparatuses for aligning the component parts of a drum assembly are disclosed. One aspect of the invention relates to tools for measuring and aligning the component parts of the drum assembly. By way of example, the tools may include indicator tools for ... | 09/05/2006 |
| 7093373 | Displacement measuring instrument A displacement measuring instrument (1) has a spindle (25) penetrating a gauge body (11) to be slidably supported relative to the gauge body (11) to be displaced and a lifting lever (20) manipulated from the outside for forcibly sh... | 08/22/2006 |
| 7086169 | Method and apparatus for best fitting two or more items What is provided in one embodiment is a method and apparatus for confirming that one or more items in a universe of items fall within specified tolerances. In another embodiment various methods for determining best fit between items in a universe of items is provide... | 08/08/2006 |
| 7047658 | Apparatus and method to measure the dimensional and form deviation of crankpins at the place of grinding An apparatus and a relevant method for checking a crankpin (18) of a crankshaft (34) positioned on a numerical control grinding machine where it is worked includes a gauging head (39) with a Vee-shaped reference device (20) and a feeler (... | 05/23/2006 |
| 7043851 | Adjustable V-block A mechanical support device for assisting individuals in setting up, creating, and verifying concentricity and roundness of a step cylindrical feature. The mechanical support device comprises a base and an adjustable section that is removably coupled to the base. Th... | 05/16/2006 |
| 7024785 | Method for the in-process dimensional checking of orbitally rotating crankpins An apparatus for checking the diameter of crankpins of a crankshaft in the course of the machining in a grinding machine includes a Vee-shaped reference device, a measuring device associated with the reference device and including a feeler axially movable along the ... | 04/11/2006 |
| 7020974 | Apparatus for checking the dimensional and geometric features of pins An apparatus for checking diameter and roundness of crankpins (42) in the course of the machining in a grinding machine, includes a Vee-shaped reference device (70), a gauging device with a movable feeler (67) associated with the Vee-shaped devi... | 04/04/2006 |
| 6996913 | Circumferential measurement of tubular members An apparatus and method are provided for circumferentially measuring cross-sectional characteristics of a tubular member. The apparatus includes first and second template members that cooperably define an aperture for receiving the tubular member. At least one of th... | 02/14/2006 |
| 6954991 | Method and apparatus for measuring shape of tubular body A pair of reference portions 20 and 20 is brought into contact with an internal peripheral surface 11 of the vicinity of both side end portions of a tubular body 10. The tubular body 10 is rotated such that contact portions where t... | 10/18/2005 |
| 6952884 | Apparatus for checking dimensional and geometrical features of pins An apparatus for checking the diameter and the roundness of pins, for example crankpins and main journals of a crankshaft rotating about its main axis of rotation (8), includes a measuring device, coupled to a Vee-shaped reference device (20) and inclu... | 10/11/2005 |
| 6939199 | Method and apparatus for cutting semiconductor wafers Improperly mounted wafer saw blades can damage wafers cut or diced with the blades. Embodiments of this invention employ sensors to measure a distance to the blade to help indicate if the blade is improperly mounted. In one method of the invention, a the distance to... | 09/06/2005 |
| 6904690 | Pipe size identifier and measuring tool A pipe size measuring tool for identifying the pipe configuration, i.e., outer diameter and inner diameter, having a plurality of gauges, each gauge having an open mouth therein. The sizes of the open mouth in each gauge are different from each other. The gauges are... | 06/14/2005 |
| 6901676 | Eccentric bushing inspection device A device and method are provided for inspecting an eccentric bushing having interior and exterior surfaces. The device includes a fixed roller and a pair of movable rollers disposed in a triangular configuration. The eccentric roller is disposed between the fixable ... | 06/07/2005 |
| 6889541 | Apparatus for measuring bore distortion of a cylinder block Specific pressure and temperature conditions of an engine being measured are achieved by a compressor and a coolant controller, and bore distortion is measured as a gap between a rotation unit and a cylinder wall, wherein the measuring position may be vertically and... | 05/10/2005 |
| 6886264 | Reference fixture for roundness measuring instrument A reference fixture (20) for a roundness measuring instrument performs acquisition of origin information of a roundness measuring instrument (1) including a workpiece rotary mechanism (3) on which a workpiece is set and a probe (14) provi... | 05/03/2005 |
| 6883242 | Method and apparatus for aligning a drum assembly used in a video recording device Methods and apparatuses for aligning the component parts of a drum assembly are disclosed. One aspect of the invention relates to tools for measuring and aligning the component parts of the drum assembly. By way of example, the tools may include indicator tools for ... | 04/26/2005 |
| 6871416 | Eccentricity and wobble sensing device A wobble and eccentricity sensing device is provided for use with a planter blade. The device includes a stand having a shaft adapted to mount the planter blade thereon for rotational movement of the planter blade about the shaft. A wobble indicator is coupled to th... | 03/29/2005 |
| 6868618 | Gauge and method The invention is a gauge and method for measuring any circular object, but is most useful as a precision thread gauge for objects having either external or internal threads. A fixed gauge roll is supported in a stationary position. A first and second gauge rolls are... | 03/22/2005 |
