GB357525A - Improvements in or relating to automatic calculating devices - Google Patents

Improvements in or relating to automatic calculating devices

Info

Publication number
GB357525A
GB357525A GB18912/30A GB1891230A GB357525A GB 357525 A GB357525 A GB 357525A GB 18912/30 A GB18912/30 A GB 18912/30A GB 1891230 A GB1891230 A GB 1891230A GB 357525 A GB357525 A GB 357525A
Authority
GB
United Kingdom
Prior art keywords
sliding
voltmeter
june
given
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.)
Expired
Application number
GB18912/30A
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.)
OSKAR ZELENKA
Original Assignee
OSKAR ZELENKA
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 OSKAR ZELENKA filed Critical OSKAR ZELENKA
Publication of GB357525A publication Critical patent/GB357525A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/24—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

357,525. C a 1 c u l a t i n gapparatus. ZELENKA, O., 19, L÷wengasse, Vienna. June 20, 1930, No. 18912. Convention date, June 20, 1929. [Class 106 (i).] The ratio of two quantities is given by an apparatus comprising two potentiometers 1, 2 connected in shunt to a source 3 of constant potential. A voltmeter 6 is connected to contacts 4, 5 sliding on the potentiometer windings, and reading against scales placed adjacent thereto The resistance y included between one end of a winding and the sliding connection when the latter is over a scale reading x is given by the formula y=log x<n>, n being an arbitrary constant. The voltmeter is graduated to indicate the ratio directly. The Specification as open to inspection under Sect. 91 (3) (a) states also that the sliding contacts 4, 5 may be set by hand to the values read off adjacent measuring instruments. This subjectmatter does not appear in the Specification as accepted.
GB18912/30A 1929-06-20 1930-06-20 Improvements in or relating to automatic calculating devices Expired GB357525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT357525X 1929-06-20

Publications (1)

Publication Number Publication Date
GB357525A true GB357525A (en) 1931-09-21

Family

ID=3672629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18912/30A Expired GB357525A (en) 1929-06-20 1930-06-20 Improvements in or relating to automatic calculating devices

Country Status (1)

Country Link
GB (1) GB357525A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803400A (en) * 1953-12-22 1957-08-20 William P Hickey Efficiency metering system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803400A (en) * 1953-12-22 1957-08-20 William P Hickey Efficiency metering system

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