GB2229525A - Improvements in and relating to scale rules - Google Patents

Improvements in and relating to scale rules

Info

Publication number
GB2229525A
GB2229525A GB9005974A GB9005974A GB2229525A GB 2229525 A GB2229525 A GB 2229525A GB 9005974 A GB9005974 A GB 9005974A GB 9005974 A GB9005974 A GB 9005974A GB 2229525 A GB2229525 A GB 2229525A
Authority
GB
United Kingdom
Prior art keywords
scale
measuring wheel
processing unit
rule apparatus
relating
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.)
Granted
Application number
GB9005974A
Other versions
GB9005974D0 (en
GB2229525B (en
Inventor
Anthony Richard Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB9005974D0 publication Critical patent/GB9005974D0/en
Publication of GB2229525A publication Critical patent/GB2229525A/en
Application granted granted Critical
Publication of GB2229525B publication Critical patent/GB2229525B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/12—Measuring wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00—Combinations of writing implements with other articles
    • B43K29/08—Combinations of writing implements with other articles with measuring, computing or indicating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/22—Pens with writing-points other than nibs or balls with electrically or magnetically activated writing-points
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G06M1/101—Design features of general application for actuating the drive by electric or magnetic means by electro-optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

In aiming to produce scale rule apparatus which is simple to use avoiding known computer based systems or the need to perform manual calculation on scale lengths, and yet to arrive at a conversion device which is accurate, the present invention provides scale rule apparatus comprising a self-contained (portable) electronic processing unit which receives scale length signals from a measuring wheel and automatically calculates and displays the actual length according to the selected scaling factor. Signal transmission from the measuring wheel to the processing unit is improved by filtration and amplification in the measuring wheel and resolution of the input signal is enhanced by use of processing techniques which respond to both positive and negative changes of state of the signal pulse.
GB9005974A 1987-10-16 1990-03-16 Improvements in and relating to counting and scaling devices Expired - Lifetime GB2229525B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB878724332A GB8724332D0 (en) 1987-10-16 1987-10-16 Scale rule
PCT/GB1988/000873 WO1989003502A2 (en) 1987-10-16 1988-10-17 Improvements in and relating to scale rules

Publications (3)

Publication Number Publication Date
GB9005974D0 GB9005974D0 (en) 1990-06-13
GB2229525A true GB2229525A (en) 1990-09-26
GB2229525B GB2229525B (en) 1991-11-06

Family

ID=10625450

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878724332A Pending GB8724332D0 (en) 1987-10-16 1987-10-16 Scale rule
GB9005974A Expired - Lifetime GB2229525B (en) 1987-10-16 1990-03-16 Improvements in and relating to counting and scaling devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878724332A Pending GB8724332D0 (en) 1987-10-16 1987-10-16 Scale rule

Country Status (2)

Country Link
GB (2) GB8724332D0 (en)
WO (1) WO1989003502A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027296A (en) * 1988-07-04 1991-06-25 Casio Computer Co., Ltd. Length measuring apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074312A (en) * 1980-03-19 1981-10-28 Integrated Process Eng Consult Measuring Surface Distances
GB2089988A (en) * 1980-12-23 1982-06-30 Electronic Modules Corp Length measuring instrument with tracing unit and switch arrangement
US4472881A (en) * 1981-09-15 1984-09-25 Electronic Modules Corporation Portable length probe with improved wheel pick-up arrangement
WO1985005175A1 (en) * 1984-05-03 1985-11-21 Cornelis Elizabeth Rijlaarsdam A tracking, measuring and calculating instrument for the determination of lengths, areas, peripheries and volumes
DE3602165A1 (en) * 1986-01-24 1987-07-30 Gerhard Freudenreich Distance meter for the direct measurement and determination of lengths and distances, in particular on reduced drawings, plans and maps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074312A (en) * 1980-03-19 1981-10-28 Integrated Process Eng Consult Measuring Surface Distances
GB2089988A (en) * 1980-12-23 1982-06-30 Electronic Modules Corp Length measuring instrument with tracing unit and switch arrangement
US4472881A (en) * 1981-09-15 1984-09-25 Electronic Modules Corporation Portable length probe with improved wheel pick-up arrangement
WO1985005175A1 (en) * 1984-05-03 1985-11-21 Cornelis Elizabeth Rijlaarsdam A tracking, measuring and calculating instrument for the determination of lengths, areas, peripheries and volumes
DE3602165A1 (en) * 1986-01-24 1987-07-30 Gerhard Freudenreich Distance meter for the direct measurement and determination of lengths and distances, in particular on reduced drawings, plans and maps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Advances in Instrumentation, vol 37,part 3,1982. Reserch *

Also Published As

Publication number Publication date
GB9005974D0 (en) 1990-06-13
GB8724332D0 (en) 1987-11-18
GB2229525B (en) 1991-11-06
WO1989003502A3 (en) 1989-05-18
WO1989003502A2 (en) 1989-04-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19971017