In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7367128 | Scale reading apparatus A rotary ring system for use in scale reading apparatus comprises a rotary ring (12), provided with scale marks on its surface and at least one intermediate member (24). The at least one intermediate member (24) is fitted between the rotary ring... | 05/06/2008 |
| 7346993 | Rotary scale A rotary ring for use in scale reading apparatus, comprises a flexible ring (10) which has scale markings (14) provided on a surface thereof. The rotary ring is mounted onto a machine part (22) by providing the machine part with a region of incr... | 03/25/2008 |
| 7302842 | Method and device for measuring a path that has been covered A displacement measuring device measures a path of a moving object that can be displaced in a direction has at least one first component that is allocated to the moveable object and a second, stationary component. The components are interlinked for the purpose of co... | 12/04/2007 |
| 7246977 | Indicating device with large graduations for a plane An indicating device with large graduations for a plane is installed at a combining section of a main base and a worktable of the plane, including a graduation ruler, a pointer and a rack. The graduation ruler formed as an arc is provided with graduations with numbe... | 07/24/2007 |
| 7134177 | Method and device for applying a scale or scale support A device for applying a scale element to a first body, in relation to which a second body can be moved in a measuring direction, the device includes an alignment element displaceable on a scale element in a measuring direction, and applied transversely thereto in a ... | 11/14/2006 |
| 7013576 | Measuring device using multi-start threaded spindle Provided is a measuring device 1 for measuring the size of an object comprising a body 2, and a spindle 3 which is screwed into the body 2 and axially advances and retracts by screwing with respect to the body 2, the measurement be... | 03/21/2006 |
| 6732559 | Integrating device to detect and recover the deformation of shoulders in a press-bending machine Integrating device to detect and recover the deformation of shoulders in a press-bending machine, including an optical ruler joined to the beater and reading trolley, pulled back elastically, and stressed by the false shoulder. The device provided for the false shou... | 05/11/2004 |
| 6516534 | Measurable guide actuator A measurable guide actuator is used to integrate a driving mechanism, a guide mechanism, and a position measuring member so as to form an integral simplifying construction, thereby facilitating the usage and thereby reducing consumption of material. The m... | 02/11/2003 |
| 6447240 | Arrangement for determining the relative angular orientation between a first machine element and a second machine element An arrangement is provided for determining the relative angular orientation between an excavator bucket and the dipper stick of an excavator. The excavator bucket is mounted on a bucket linkage that is pivotally secured to the end of the dipper stick. An ... | 09/10/2002 |
| 6438861 | Armature slot radial clearance-gauging device A radial clearance measurement device includes a pair of opposed drive heads, connected by an adjustable strut. Each drive head is fitted with a radial distance measurement device including a plate adapted to slide within a dovetail groove in a radial sta... | 08/27/2002 |
| 6433875 | Measuring device for measuring the accuracy of the position and track of a moving machine element A measuring system for measuring the accuracy of the position and track of a machine element moved along a predetermined track. The system includes a predetermined track along which a machine element moves relative thereto and a measuring device for measu... | 08/13/2002 |
| 6327791 | Chain code position detector A position detector for sensing the position of a movable member which moves along an axis relative to a stationary member. A nonrepeating N bit chain code embodied in a scale on the movable member runs along the axis. A detector fixed to the stationary m... | 12/11/2001 |
| 6272760 | Damping device for a coordinate measuring equipment A damping device for vibration damping of components of a coordinate measuring equipment has a damping component which is frictionally connected to the component to be damped. The characteristic frequency of the damping component deviates from the charact... | 08/14/2001 |
| 6269546 | Head for the linear dimension checking of mechanical pieces A gauging or measuring head for the linear dimension checking of mechanical pieces, including a casing (1), an arm (49) carrying a feeler (67) for contacting a piece to be checked, a fulcrum (74), coupled to the casing (1) and the arm (49), for enabling d... | 08/07/2001 |
| 6253460 | Apparatus for position measurement and a system and a method for using the same An apparatus, system and method for determining the position for translating, rotating and complex motion generating shaft elements are provided. A layer may be deposited over an exterior surface of the shaft element containing a known surface geometry to... | 07/03/2001 |
| 6219927 | Manual adjuster for prestressing a differential gear and method of making a differential gear using same A differential gear housing includes grooves into which retaining rings are fitted which engage on races of tapered roller bearings. The width of the securing rings is determined in accordance with the desired tooth flank clearance between a ring gear and... | 04/24/2001 |
| 6185829 | Device for measuring the position of the plunger in a glassware forming machine A sensor structured as a two-part oscillator is employed in a device for measuring the position of a movable operating member of a machine, such as a plunger in a glassware forming machine. The plunger is attached on a piston rod of a piston/cylinder unit... | 02/13/2001 |
| 6108925 | Length measurement system A length measurement system for measuring the relative position of two objects in a given measuring direction comprises a scale carrier which carries a measurement scale and which is fastened to a first of the two objects and a scanning head which scans t... | 08/29/2000 |
| 6099235 | Arrangement for determining the relative angular orientation between a first machine element and a second machine element An arrangement is provided for determining the relative angular orientation between an excavator bucket and the dipper stick of an excavator. The excavator bucket is mounted on a bucket linkage that is pivotally secured to the end of the dipper stick. An ... | 08/08/2000 |
| 6088925 | Capture feature tang seal defect measurement tool An apparatus for measuring seal defects on a seal surface of a rocket motor case field joint is provided. The apparatus includes a base mountable onto the rocket motor case field joint. The base is sweepable circumferentially along the field joint. An axi... | 07/18/2000 |
| 6073358 | Arrangement and method for measuring a distance An arrangement and method for measuring a distance between rotating and stationary parts of a device, such as a turbine. The arrangement and method allow for the measurement of a distance between the tip of the rotating bodies arranged on a rotor of the t... | 06/13/2000 |
| 6035541 | Method and apparatus facilitating the measurement of a clearance in a hemispherical dynamic pressure bearing A hemispherical dynamic pressure bearing comprises a bushing in which a hemisphere/shaft unit is mounted with clearance, enabling the unit to move relative to the bushing between first and second terminal positions. In order to measure the size of the cle... | 03/14/2000 |
| 5918493 | Sensor support A contour measuring devices for measuring the contour of hot-strip rolls installed in a roll stand during a rolling process includes a plurality of distance sensors that extend along the length of the hot-strip roll in a perpendicular and non-contacting m... | 07/06/1999 |
| 5837981 | Signal outputting device of optical ruler A signal outputting device of optical ruler is disclosed. It includes a first guide seat formed with an internal axial chamber for receiving a reflecting plate therein, a second guide seat including a slide block axially movable within the chamber and a r... | 11/17/1998 |
| 5566463 | Servo system A servo system includes a driven body (C), a hydraulic driving unit (A) for moving the driven body (C), a mechanical hydraulic servo valve (1), a sheave (31), a flexible measuring tape (33), a rotary driving source (M) and an adjusting unit (4,5,6,7). The... | 10/22/1996 |
| 5457892 | Gauge for forming die keeper pin assemblies A gauge for determining pertinent dimensions to which portions of die keeper pin assemblies are to be machined prior to insertion of the latter into a stamping die assembly. The gauge includes a body having a partial circular extension formed on one end t... | 10/17/1995 |
| 5367748 | Location determining device for a travelling bale opener A bale opener for removing fiber tufts from top surfaces of fiber bales assembled in a series includes a carriage for travelling back-and-forth along a generally horizontal, first path of travel along the fiber bale series; a tower mounted on the carriage... | 11/29/1994 |
| 5272927 | Anti-backlash spline coupling for use in a position measuring system An anti-backlash spline coupling configured to have the identical rotation as a spline shaft with which it is engaged. The coupling includes two plates and tensioning means which bias the rotary movement of each plate against the other. The coupling may b... | 12/28/1993 |
| 5216819 | Method of detecting long and short rivets A method of detecting rivets which are outside of a predetermined length tolerance includes holding a rivet in a first reference position with its head in a rivet hole countersink, and moving a probe, in the form of a rivet tail die, into contact with the... | 06/08/1993 |
| 5171584 | System for determining the distance between two solid bodies A nozzle for a gap measuring system includes a short outlet passageway defined by a smooth, cylindrical wall terminating in an outlet orifice and having an entrance orifice surrounded by a wall portion that is substantially perpendicular to the outlet pas... | 12/15/1992 |
| 4969274 | Displacement measuring and remote control apparatus with a sheave and a flexible belt A displacement measuring and remote control apparatus includes a sheave having a helical groove therein, a flexible belt wound on the sheave along the helical groove and connected securely to a movable member, an azimuth identification device connected to... | 11/13/1990 |
| 4903750 | Continuous caster roll monitor A gap monitor for rolls of a continuous casting machine characterized by sets of rolls disposed in opposed pairs separated by spaced gaps and defining a path of travel for a workpiece, each roll comprising aligned roll segments, a roll gap monitor includi... | 02/27/1990 |
| 4731930 | Enclosed measuring device An enclosed measuring device for measuring the relative position of two objects which are movable relative to each other includes a housing provided with a longitudinal slot. The slot is closed by means of cover members mounted in a chamber of the housing... | 03/22/1988 |
| 4700483 | Position detection device for movable head A device for detecting the position of a wheel head of a grinding machine is provided with a housing secured to the wheel head and a support rod secured at its opposite ends to a stationary base in parallel relation with the moving direction of the wheel ... | 10/20/1987 |
| 4676127 | Tool holding apparatus having cutting edge moving function The invention has as an object to provide a reliable, failure-free tool holding apparatus which allows digitization of a tool holding apparatus having a tool moving function, is free from various problems encountered upon digitization, and does not cause ... | 06/30/1987 |
| 4548105 | Method and arrangement for observing a position In a method for determining, by means of an observing and recording measuring device the exact position of a movable member and/or for determining a corrective movement to be performed from a position of the member, a measuring device having a datum posit... | 10/22/1985 |
| 4492032 | Coupling arrangement for length measuring device A coupling apparatus for a length measuring instrument is disclosed. The length measuring instrument includes a scale, which defines a division, and a scanning unit. The scale is connected to a first object and the scanning unit is connected to a second o... | 01/08/1985 |
| 4490914 | Error correction system for position measuring instruments An error correction system for correcting machine errors or division errors in a position measuring instrument for precision machines is disclosed. The system is usable, for example, in conjunction with instruments for measuring the relative position of t... | 01/01/1985 |
| 4457072 | Crosshead and bolster spacing control for servo controlled press A transducer arrangement provides a feedback signal which indicates the position of a first part relative to a base and when a second movable part is positioned adjacent the first part the transducer provides a signal indicating the spacing between the tw... | 07/03/1984 |
| 4437240 | Telemetry gage system An optically coupled in-process gaging system is disclosed for use with numerically controlled machine tools wherein a battery-powered gage unit is enclosed in a housing adapted for retention in an automatic NC program controlled selection from the NC too... | 03/20/1984 |