| Patent Number |
Title Of Patent |
Date Issued |
| 6446350 |
Method and arrangement for reducing temperature-related dimensional discrepancies in measurement |
September 10, 2002 |
| A measurement system is described having parts that are not joined directly to the machine being measured, so that a change in the geometry of the machine cannot result in a shifting of the measurement systems relative to one another. The shifting of the measurement systems with respect |
| 6349481 |
Device and method for attaching a scale |
February 26, 2002 |
| A device for the attachment of a scale component of a length measuring system to a mounting surface of a first body, wherein a second body is arranged to be displaceable in relation to the first body in a measuring direction, wherein an adhesive layer is provided between the scale co |
| 6163970 |
Linear encoder with a modular scale and a method of producing same |
December 26, 2000 |
| A linear encoder including a modular scale having at least one support and a plurality of graduation carriers mounted on the support and arranged one behind another in a longitudinal direction, with the support and the graduation carriers having substantially same coefficients of thermal |
| 6092296 |
Scale and scanning unit of a length measuring instrument, and method for attaching a scale |
July 25, 2000 |
| A scale or scanning unit of a measuring instrument for measuring the relative motion of two objects movable toward one another is secured to the one object and cooperates with a scanning unit or a scale to detect the relative location of the object. According to the invention, the scale |
| 5856668 |
Photoelectric position measuring encoder having scale formed of electrically non-conductive mate |
January 5, 1999 |
| A photoelectric position measuring encoder including a scale formed of an electrically non-conductive material and having a graduation, a scanner for photoelectrically scanning the graduation and displaceable relative to the scale in a measuring direction for generating a position-depend |
| 5793201 |
Position indicating encoder with magnetic end position determining elements |
August 11, 1998 |
| An encoder for determining a position of an object and including a measuring standard, a standard carrier, and a scanner displaceable relative to the measuring standard for scanning the measuring standard, with the limit positions switches being formed as magnetic stripes secured in |
| 5630283 |
Linear or angular encoder |
May 20, 1997 |
| An encoder including a measuring standard, a scanner for scanning the grating of the measuring standard, a measuring standard carrier having a groove for receiving the measuring standard, a relatively thin glue layer provided between one of the opposite surfaces of the groove and the |
| 5553390 |
Length measuring system |
September 10, 1996 |
| A length measuring system having a scale with a first portion and a second portion separated by a gap, wherein the first and second portions each have incremental graduations. The system further includes a scanner unit for scanning the incremental graduations of the first and second port |
| 5526706 |
Sealed encoder |
June 18, 1996 |
| A sealed encoder for measuring a relative position of two objects movable relative to each other and including a housing connected with one of the objects, an entrain member, which is located in a slot formed in the housing, for supporting a position-measuring device and connected with |
| 5511321 |
Linear encoder |
April 30, 1996 |
| A linear encoder for measuring a relative position of two objects and including a scale having a coefficient of thermal expansion between 2.5.times.10.sup.-6 K.sup.-1 and 3.5.times.10.sup.-6 K.sup.-1 approximately, and attachable to one of the objects, and a device for scanning the s |
| 5485680 |
Encapsulated measuring apparatus |
January 23, 1996 |
| An encapsulated measuring apparatus for determining the relative position of two objects is disclosed which comprises a measurement embodiment, a probing means, a hollow member, a seal, an entrainment member, an installation pedestal and at least one additional seal, wherein the meas |
| 5456021 |
Apparatus and method for measuring linear and angular displacements |
October 10, 1995 |
| An apparatus and method for measuring displacement by determining the relative speed between a scale and a scanning plate from reading out a first track twice at different times. From this, correction values for the other tracks are calculated, which represent values from those tracks th |
| 5375338 |
Length measurement device |
December 27, 1994 |
| A length measurement device for measuring the relative position of two objects is disclosed wherein a graduation on a scale carrier is scanned by a scanning unit for obtaining measured position values. The scale carrier is connected to a first fixed reference point within the measuring l |
| 5182867 |
Position measuring apparatus |
February 2, 1993 |
| A position measuring apparatus is described wherein a probing unit is connected with a first object and probes the graduation of a measuring scale which is arranged upon a support member. The support member is fastened to a second object. The support member and the second object have |
| 5142792 |
Position measuring device |
September 1, 1992 |
| A position measuring device for measuring the relative positions of two objects. A scanning unit for scanning a graduation carrier is mounted on a bed of a processing machine through a coupling which is stiff in measuring direction. The coupling includes a first coupling part in the form |
| 4982508 |
Position measuring device |
January 8, 1991 |
| A position measuring device including a scale carrier member and a scanning device for scanning the scale. A temperature difference is generated between the scale carrier member and/or the scanning device, on the one hand, and a housing surrounding the scale carrier member and the scanni |
| 4776098 |
Length measuring apparatus with temperature compensation |
October 11, 1988 |
| In a length measuring apparatus for measuring the relative position of two objects movable relative to each other a scanning unit fastened to the first object scans the graduation of a scale fastened to the second object. The scale is connected to the second object at both ends by means |
| 4573000 |
Measuring instrument |
February 25, 1986 |
| In an incremental measuring instrument for measuring the relative position of two objects, of the type including reference marks absolutely positioned with respect to a graduation of a scale, a first scanning plate with scanning fields for the graduation is provided in a scanning unit |
| 4527056 |
Error correction system for position measuring device |
July 2, 1985 |
| A length or angle measuring system is provided in which for the purposes of error correction the graduation of the measuring scale is scanned on both sides of the graduation axis which runs along the measuring direction. The weighting given to the two sides of the measuring graduation is |
| 4519709 |
Photoelectric incremental length or angle measuring device |
May 28, 1985 |
| A photoelectric incremental length or angle measuring device capable of alternate embodiments using transillumination or reflected-light arrangements and having a scanning grid slidable with respect to a spaced measuring scale grid. The ratio of the widths of the photopermeable to the |
| 4492032 |
Coupling arrangement for length measuring device |
January 8, 1985 |
| 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 object movable relative to the |
| 4479716 |
Incremental measuring instrument |
October 30, 1984 |
| An incremental length or angle measuring instrument includes a scale having a line grid and a plurality of reference marks. A scanning unit is provided with a plurality of photosensors to scan both the line grid and the reference marks. A reference mark selecting arrangement is described |
| 4479304 |
Fastening element for length measuring device |
October 30, 1984 |
| A length measuring device is disclosed which includes a housing which encapsulates a measuring scale and a scanning unit. This housing is fastened by means of fastening elements to one of the objects, the position of which is to be measured. One of the two fastening elements directly |
| 4400880 |
Precision measuring apparatus |
August 30, 1983 |
| A precision measuring apparatus (10, 10') includes a measuring scale (12, 12'), a scanning unit (15, 15') for scanning the scale (12, 12'), and a housing (11, 11') for supporting the scale (12, 12') and the scanning unit (15, 15'). The scanning unit (15, 15') rides on guide surfaces (16, |
| 4400651 |
Method and circuit for operating an incandescent lamp |
August 23, 1983 |
| A method and circuit for operating an incandescent lamp are disclosed in which the operating voltage applied to the lamp alternates in a regular and abrupt manner between forward and reverse polarities. The magnitude of the voltage is substantially the same for the two polarities and, |
| 4329736 |
Lamp support apparatus |
May 11, 1982 |
| A lamp support apparatus is disclosed for mounting an incandescent lamp to an electro-optical measuring device mountable on a machine tool. This apparatus includes a spring element for resiliently mounting the lamp to the measuring device and a damping element for damping the oscillation |
| 4297033 |
Incremental photoelectric measuring device |
October 27, 1981 |
| An incremental photoelectric measuring device is described including a measuring scale having a line grid and a scanning plate having a line grid, wherein the grid spacings of the two line grids are unequal such that one is an integral multiple of the other. Preferably the scale is p |
| 4295742 |
Longitudinal measuring device |
October 20, 1981 |
| A guiding apparatus for guiding and positioning a scanning unit in a longitudinal measuring device is disclosed wherein the measuring device includes a measuring scale, a driving unit for connecting the device to an object whose position is to be measured, and first and second guide |
| 4273447 |
Pivotable mount for scanning unit |
June 16, 1981 |
| A scanning unit for a measuring instrument including a measuring scale is pivotably mounted to a mounting member by a strip of material which forms a solid hinge which permits the scanning unit to pivot with respect to the mounting member about an axis substantially perpendicular to the |
| 4170829 |
Correction apparatus for longitudinal or angular measuring system |
October 16, 1979 |
| An apparatus for compensating for errors in a longitudinal or angular measuring device includes one or more adjustment members arranged to contact the measuring scale of the measuring device and to deflect the scale out of the graduation plane. The deflection of the scale is used to |
