ES363799A1 - A calculator - Google Patents

A calculator

Info

Publication number
ES363799A1
ES363799A1 ES363799A ES363799A ES363799A1 ES 363799 A1 ES363799 A1 ES 363799A1 ES 363799 A ES363799 A ES 363799A ES 363799 A ES363799 A ES 363799A ES 363799 A1 ES363799 A1 ES 363799A1
Authority
ES
Spain
Prior art keywords
curves
cursor
give
base
slot
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
Application number
ES363799A
Other languages
Spanish (es)
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 ES363799A1 publication Critical patent/ES363799A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/0005—Hand manipulated computing devices characterised by a specific application
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G1/00—Hand manipulated computing devices
    • G06G1/14—Hand manipulated computing devices in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

A calculating device consists of a stiff box member on which a plurality of graphs is printed, and through which a slot 2 is cut, and a cursor 3 having one or more projections 4 engageable with said slot. Thus one of a family of curves on the cursor can be positioned relative to the plurality of curves on the base to give the required correlation. In a particular embodiment the slot 2 is disposed between two printed scales on a cardboard base 1. Curves b give a nozzle characteristic for a refrigeration plant, while curves a give the specific performance of that plant. Ordinates c give a specific condensation pressure, and the family of curves d on the cursor represent specific evaporation temperatures. Each different refrigerant has a different base card, although the cursor fits all such cards. Holes 5 are used to retain the cards in a ring binder. The base may have two spaced parallel slots.
ES363799A 1968-02-21 1969-02-19 A calculator Expired ES363799A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0033794 1968-02-21

Publications (1)

Publication Number Publication Date
ES363799A1 true ES363799A1 (en) 1970-12-01

Family

ID=7095253

Family Applications (1)

Application Number Title Priority Date Filing Date
ES363799A Expired ES363799A1 (en) 1968-02-21 1969-02-19 A calculator

Country Status (6)

Country Link
BE (1) BE728586A (en)
ES (1) ES363799A1 (en)
FR (1) FR2002302A1 (en)
GB (1) GB1207798A (en)
LU (1) LU57950A1 (en)
NL (1) NL6901686A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1207529B (en) * 1982-07-23 1989-05-25 Indesit REGULATOR CALCULATOR FOR THE CALCULATION OF THE OPERATING PARAMETERS AND FREEZING OF APPLIANCES FOR THE PRODUCTION OF COLD
GB2210185A (en) * 1987-09-02 1989-06-01 Crane Ltd A chart

Also Published As

Publication number Publication date
NL6901686A (en) 1969-08-25
FR2002302A1 (en) 1969-10-17
LU57950A1 (en) 1969-05-22
GB1207798A (en) 1970-10-07
BE728586A (en) 1969-08-01

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