GB773494A - Improvements in or relating to apparatus for measuring dimensions or relative positions - Google Patents
Improvements in or relating to apparatus for measuring dimensions or relative positionsInfo
- Publication number
- GB773494A GB773494A GB14635/53A GB1463553A GB773494A GB 773494 A GB773494 A GB 773494A GB 14635/53 A GB14635/53 A GB 14635/53A GB 1463553 A GB1463553 A GB 1463553A GB 773494 A GB773494 A GB 773494A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- thread
- pulses
- counter
- scale
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003111 delayed effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
- G01D13/02—Scales; Dials
- G01D13/04—Construction
- G01D13/10—Construction with adjustable scales; with auxiliary scales, e.g. vernier
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/22—Analogue/digital converters pattern-reading type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Microscoopes, Condenser (AREA)
Abstract
773,494. Electric signalling systems. MULLARD RADIO VALVE CO., Ltd. May 17, 1954 [May 26, 1953], No. 14635/53. Class 40 (1). [Also in Group XL (b)] In apparatus for measuring a dimension or locating the position of an object such as a machine tool accurately the position of a coarse scale carried by the tool is optically compared with a fine scale by counting subdivision of the fine scale from a datum determined by the coarse. As shown (Figs. 7 and 8) the coarse scale is constituted by a screw-thread 18, the section of which is indicated by the line 5 (Fig. 8) the vertical edges constituting the datum marks the precise position of which is to be determined. This scale is traversed by a vertical line of light produced by a source 1, lens 2, mirror 3 and cylindrical lens 4, these last two elements being mounted on a reciprocating carriage. The line of light passes to the coarse thread through the lower half 5<SP>11</SP> of a mask of 5 and to a photo-cell 12 through the upper half. This upper half consists of alternately opaque and transparent divisions, one hundred of the divisions corresponding to the space between two vertical edges of the screw-thread. Thus as the light beam traverses the fine scale photo-cell 12 produces a series of pulses. Between the lower half of mask 5 and the screw thread is a microscope assembly, which images the beam or to the screw-thread with a reduction ratio of about 40 to 1. Photo-cell 22 behind the thread produces an output depending on the position of the screw-thread relatively to the traversing beam. In practice there are more fine subdivisions than correspond precisely to the spacing between two vertical edges of the thread. The output of cell 22 is also shown in Fig. 8, the vertical drop Q1 representing the crossing of one of the vertical edges by the scanning beam. A similar drop Q2 is produced during the return stroke but this is distinguished by differentiating the output of cell 22 when Q1 produces a negative and Q2 a positive pulse. Operation, Fig. 9.-A manual input unit 26 comprising switches 27, 28, representing hundredths and thousandths of an inch respectively is set up to represent table position, further switches 29 being provided if desired to give the coarse setting to a tenth of an inch. This unit determines the initial setting of a counter 34. As soon as scanning commences photo-cell 12 begins generating pulses but until output of cell 22, differentiated at 31, produces negative pulse 62, gate 32 does not open and pulses cannot pass to counter 34. This counter is so arranged as to count to 100 only and successive pulses are subtracted from the setting of the counter. Unit 30 detects the end of the forward scan and shuts gate 32 and triggers a transfer pulse generator 37. This generator closes transfer relays 35 and transfers the scanning count in counter 34 and it is finally displayed as to magnitude and sense on a meter 41. After a delay to allow transfer stages 35 time to open imposed by delay circuit 35, reset pulse generator 39 provides a delayed reset pulse which is fed through the manual input unit to restore counter 34 to the setting of that unit. Modification.-In the arrangement of Figs. 1 to 4 (not shown), an apertured screen is projected past the edge of a main sawtooth scale, the arrangement being that pulses produced by a scanning beam of light passing both the screen and sawtooth edge are counted. However, to take account of pulses produced when the end of the screen is overlapping a tooth other than that to be measured, a continuous train of pulses is generated by a second photo-cell and provided a pulse has been received from both trains simultaneously counting of the first train continues to the end of the train. Specification 777,935, [Group XIX], is referred to.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14635/53A GB773494A (en) | 1953-05-26 | 1953-05-26 | Improvements in or relating to apparatus for measuring dimensions or relative positions |
CH355618D CH355618A (en) | 1953-05-26 | 1954-05-24 | Method for measuring or adjusting the relative position of two bodies |
DEM23195A DE1159174B (en) | 1953-05-26 | 1954-05-25 | Device for measuring the mutual position of two objects |
FR1110708D FR1110708A (en) | 1953-05-26 | 1954-05-25 | Measuring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14635/53A GB773494A (en) | 1953-05-26 | 1953-05-26 | Improvements in or relating to apparatus for measuring dimensions or relative positions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB773494A true GB773494A (en) | 1957-04-24 |
Family
ID=10044803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14635/53A Expired GB773494A (en) | 1953-05-26 | 1953-05-26 | Improvements in or relating to apparatus for measuring dimensions or relative positions |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH355618A (en) |
DE (1) | DE1159174B (en) |
FR (1) | FR1110708A (en) |
GB (1) | GB773494A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1082744B (en) * | 1958-03-28 | 1960-06-02 | Feinmechanik | Method for measuring or controlling movements and device for carrying out the method |
US3153111A (en) * | 1958-06-26 | 1964-10-13 | Nat Res Dev | Measurement of displacements |
DE1185831B (en) * | 1960-09-16 | 1965-01-21 | Siemens Ag | Arrangement for maintaining a constant weight mixing ratio of several substances to be continuously mixed with one another |
DE1191591B (en) * | 1958-01-17 | 1965-04-22 | Licentia Gmbh | Method for photoelectrically determining the relative position of at least one edge of an object |
DE1294048B (en) * | 1962-03-09 | 1969-04-30 | Pfister Marcel Charles | Device for determining the position coordinates of a measurement object |
DE1423837B1 (en) * | 1961-03-07 | 1970-06-25 | Zuse Kg | Device for automatic reading of the position of a pointer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115069325B (en) * | 2021-03-12 | 2023-10-31 | 平湖莱顿光学仪器制造有限公司 | Equipment for automatically taking and placing glass sheet disc |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE646509C (en) * | 1931-07-25 | 1937-06-19 | Carl Schenck Eisengiesserei | Device for photoelectric control of electromagnetically set display and printing units for measuring instruments, e.g. B. Inclination scales |
DE663931C (en) * | 1932-02-04 | 1938-08-17 | Int Standard Electric Corp | Photoelectric arrangement for displaying moving objects |
DE613082C (en) * | 1932-03-27 | 1935-05-13 | Losenhausenwerk Duesseldorfer | Length measuring device |
DE675842C (en) * | 1935-10-22 | 1939-05-19 | Emil Mogk Dipl Ing | Device for setting a numerical mechanism according to the position of a light-electrically scanned pendulum-like body which is adjusted by a measuring mechanism and provided with control points |
DE876162C (en) * | 1941-04-30 | 1953-05-11 | Genevoise Instr Physique | Photoelectric precision device for setting a moving object in a precisely predetermined position |
US2488351A (en) * | 1947-02-19 | 1949-11-15 | Firm Soc Genevoise D Instr De | Optical device for the measurement of relative displacements of a carriage slidable on a machine bed |
DE844076C (en) * | 1949-11-11 | 1952-07-17 | Genevoise Instr Physique | Reading device for photoelectric microscopes |
DE942720C (en) * | 1952-04-02 | 1956-05-09 | Ciba Geigy | Self-indicating scales with a movable scale for indicating the weight of gas bottles and with a device for automatically displaying or registering the speed of the weight changes or the gas flow caused by gas extraction |
-
1953
- 1953-05-26 GB GB14635/53A patent/GB773494A/en not_active Expired
-
1954
- 1954-05-24 CH CH355618D patent/CH355618A/en unknown
- 1954-05-25 DE DEM23195A patent/DE1159174B/en active Pending
- 1954-05-25 FR FR1110708D patent/FR1110708A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1191591B (en) * | 1958-01-17 | 1965-04-22 | Licentia Gmbh | Method for photoelectrically determining the relative position of at least one edge of an object |
DE1082744B (en) * | 1958-03-28 | 1960-06-02 | Feinmechanik | Method for measuring or controlling movements and device for carrying out the method |
US3153111A (en) * | 1958-06-26 | 1964-10-13 | Nat Res Dev | Measurement of displacements |
DE1185831B (en) * | 1960-09-16 | 1965-01-21 | Siemens Ag | Arrangement for maintaining a constant weight mixing ratio of several substances to be continuously mixed with one another |
DE1423837B1 (en) * | 1961-03-07 | 1970-06-25 | Zuse Kg | Device for automatic reading of the position of a pointer |
DE1294048B (en) * | 1962-03-09 | 1969-04-30 | Pfister Marcel Charles | Device for determining the position coordinates of a measurement object |
Also Published As
Publication number | Publication date |
---|---|
CH355618A (en) | 1961-07-15 |
FR1110708A (en) | 1956-02-16 |
DE1159174B (en) | 1963-12-12 |
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