GB2229535A - Electronic distance measuring calculator - Google Patents

Electronic distance measuring calculator Download PDF

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Publication number
GB2229535A
GB2229535A GB8902105A GB8902105A GB2229535A GB 2229535 A GB2229535 A GB 2229535A GB 8902105 A GB8902105 A GB 8902105A GB 8902105 A GB8902105 A GB 8902105A GB 2229535 A GB2229535 A GB 2229535A
Authority
GB
United Kingdom
Prior art keywords
calculator
sensor unit
interfaced
map
measuring calculator
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.)
Withdrawn
Application number
GB8902105A
Other versions
GB8902105D0 (en
Inventor
Alan Stewart Philpott
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
Priority to GB8902105A priority Critical patent/GB2229535A/en
Publication of GB8902105D0 publication Critical patent/GB8902105D0/en
Publication of GB2229535A publication Critical patent/GB2229535A/en
Withdrawn legal-status Critical Current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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The electronic measuring calculator is an instrument similar to a conventional pocket calculator but which has an interfaced wheel driven pulse generating sensor unit which can be moved over a surface such as a map or plan to give a distance readout directly on a digital display or to a printer. The sensor unit can be built into the instrument or it may be demountable for ease of use, whilst still connected to and interfaced with the measuring calculator circuit. It may include an optical shutter or reflector or have a series of pulses recorded in a magnetic coating and sensed by a record/replay head. The number of pulses from the sensor unit are directly related to the distance covered by the external wheel. After a sample run over the scale of a map or plan the instrument is programmed to display any further movement of the sensor as the actual distance it represents.

Description

ELECTRONIC IBASURING CALCULATOR This invention relates to an electronic measuring calculator.
Small electronic calculators, pocket or desktop, simple or complex are well known instruments. The user inputs data and instructions by means of a keypad and the answer is given on an electronic display. Some versions also allow a paper print out to be made.
Using a normal calculator to calculate measurements from a map or plan. for example a route between places on a map, the usual.
procedure would be to first use a ruler, dividers or other mechar.i~al aid to measure the distances on the map. Iher, by centering this information together with data from the maps scale an answer will be found.
According to the present invention there is provided an electronic measuring calculator comprising an instrument similar to a conventional calculator but which has an interfaced pulse generating sensor unit which can be moved over a surface such as a map or plan to give a distance readout directly on the electonic measuring calculator display or printer.
The sensor unit is built into the instrument but it may be deinountable for ease of use, however it is connected to and interfaced with the measuring calculator circuit.
The sensor unit in its basic form consists of an external wheel which drives an internal rotor which acts as the optical shutter or reflector for an opto-electronic switch. The opto electronicswitch and its associated amplifier and output stage are then linke to and interfaced with the calculators processing circuit that the number of switched pulses from the sensor unit may be county and either manually or automatically stored into the mern Tb sensor unit in it mDre sophisticated high resolution form cons sts of an external wheel which drives an internal rotor which has a magnetic film coating. The magnetic film coating on the rotor rubs against a magnetic recording/replay head. Recorded ont. this film are a series of pulses, which when the rotor turns are detected by the replay head and fed to an amplifier and output stage. This is then linked to and interfaced with the calculators processing circuit so that the number of switched pulses f the sensor unit may be counted and either manually or automatically stored into the memory.
It should be noted that the number of pulses from the sensor units described above are directly related to the distance covered by the external wheel if it is rotated by friction contact when the sensor unit is pushed across a surface.
h specific use of the invention will now be described by way of an example, how to find the distance between points on a map.
The sens@r is run over the maps scale markings and sends a series of pulses relative to the distance covered@ to the calculators memory.The distance the maps scale markings represent is now entered tV means of the keypad. By comparing the number of pulses I in memory ard the figure entered by the keypad, a calculation is obtained of the precise distance represented by each pulse from the sensor.
9'its, this information entered into memory, the sensor can now be rut over any part of the map in question and the display will show the actual distance this represents.

Claims (3)

PLAITS
1 An electronic measuring calculator comprising a hand held instrument similar to a conventional calculator but which has an interfaced wheel driven pulse generating sensor unit which can be moved over a surface such as a map or plan to give a distance readout directly on the electonic measuring calculator display.
2 An electronic measuring calculator as claimed in Claim 1 wherein the sensor unit may be demountable for ease of use, however it is connected to and interfaced with the measuring calculator circuit.
3 An electronic measuring calculator as claimed in Claim 1 or Claim 2 wherein the display is output to a printer as well or instead zf to the digital readout,
GB8902105A 1989-01-31 1989-01-31 Electronic distance measuring calculator Withdrawn GB2229535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8902105A GB2229535A (en) 1989-01-31 1989-01-31 Electronic distance measuring calculator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8902105A GB2229535A (en) 1989-01-31 1989-01-31 Electronic distance measuring calculator

Publications (2)

Publication Number Publication Date
GB8902105D0 GB8902105D0 (en) 1989-03-22
GB2229535A true GB2229535A (en) 1990-09-26

Family

ID=10650893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8902105A Withdrawn GB2229535A (en) 1989-01-31 1989-01-31 Electronic distance measuring calculator

Country Status (1)

Country Link
GB (1) GB2229535A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1255194A (en) * 1968-03-13 1971-12-01 Romay Ag Improvements in or relating to apparatus for analytical evaluation of designs, drawings or patterns
GB2074312A (en) * 1980-03-19 1981-10-28 Integrated Process Eng Consult Measuring Surface Distances
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
GB2169712A (en) * 1985-01-11 1986-07-16 Gen Electric Method and apparatus to generate angular velocity signals by magnetic recording and playback
GB2189316A (en) * 1986-04-16 1987-10-21 Kingdery Liu Electronic calculator with distance-measuring device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1255194A (en) * 1968-03-13 1971-12-01 Romay Ag Improvements in or relating to apparatus for analytical evaluation of designs, drawings or patterns
GB2074312A (en) * 1980-03-19 1981-10-28 Integrated Process Eng Consult Measuring Surface Distances
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
GB2169712A (en) * 1985-01-11 1986-07-16 Gen Electric Method and apparatus to generate angular velocity signals by magnetic recording and playback
GB2189316A (en) * 1986-04-16 1987-10-21 Kingdery Liu Electronic calculator with distance-measuring device

Also Published As

Publication number Publication date
GB8902105D0 (en) 1989-03-22

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)